European Alternatives to SaneBox
Looking for a European alternative to SaneBox? SaneBox, Inc. is a US company that sorts your inbox by reading message headers on its own servers, under the laws of Massachusetts.
No European tool is an exact copy, but eleven cover parts of the job: a prompt-driven add-on, a sender screener, an email app with a Smart Inbox, an AI inbox assistant, and seven mail providers whose own filters sort mail for you.
How we rank these tools — 4-step process
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1
European ownership, verified
The company is headquartered and incorporated in the EU, EEA or Switzerland, and processes customer data in Europe. A US parent company disqualifies a tool from this page regardless of where its servers are.
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2
Category fit and hands-on review
What the tool actually does, who it suits, and where it falls short — checked against the vendor’s own documentation, changelog and pricing page rather than its marketing copy.
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Compliance and pricing check
GDPR posture, hosting location and the prices quoted on this page are verified against the vendor’s public pricing before publication, and re-checked when we revisit the category.
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Position on this page
Placement on this page can be paid, and that can affect which tools appear here and the order they appear in. It never buys a good review: a tool that fails the checks above is not here at any price, and payment does not change the shortcomings we write about. A vendor can ask us to correct a factual error — not to remove a criticism.
Vendors can pay for visibility on this page. It never changes what an entry says about a product, including the criticism, and we earn nothing when you click through to a vendor. Paid placement can affect which tools appear here and the order they appear in. Editorial policy
11 European Alternatives to SaneBox
Spark
Email app from Spark Mail Limited in Dublin, with a Smart Inbox and Gatekeeper on the free plan
Leave Me Alone
Screens unknown senders, bundles mail into digests and unsubscribes you, on any mailbox
Fyxer
London AI assistant that labels Gmail and Outlook mail and drafts replies
Infomaniak
Swiss mailbox that categorises promotional and social mail, with Sieve rules on top
Mailbox.org
Berlin mailbox with server-side Sieve rules that file mail on arrival
AI Email Filter
Sorts any IMAP mailbox into folders with prompts you write; bring your own LLM
Proton Mail
Encrypted Geneva mailbox with custom filters and Sieve, one active filter on the free plan
Runbox
Oslo mailbox with unlimited custom filters and spam control, running since 2000
Posteo
Berlin mailbox with sender and subject filters of up to 16 rules each
Tuta
Encrypted Hanover mailbox with simple sender, domain and subject inbox rules
Mailfence
Brussels mailbox with multi-condition filters on paid plans
Key takeaways
- SaneBox, Inc. is a US company under Massachusetts law; it says it reads message headers only and does not store message bodies.
- There is no European one-to-one replacement. This page lists eleven tools, and they are not interchangeable: four work on a mailbox you already have, and seven are mail providers whose own filters sort mail only after you move there.
- AI Email Filter (Zürich) is the only prompt-driven add-on: it sorts any IMAP mailbox with descriptions you write, with bring-your-own-LLM and self-hosting options.
- Spark (Spark Mail Limited, Dublin) puts a Smart Inbox in the free plan, but it means changing your mail app, not adding a folder service.
- Fyxer (Fyxer AI Limited, London) labels and drafts for Gmail and Outlook only, and is the most expensive tool here.
- Leave Me Alone (Squarecat OÜ, Estonia) screens unknown senders, bundles mail into digests and unsubscribes you, on any mailbox. The seven mail providers here (Infomaniak, Mailbox.org, Proton Mail, Runbox, Posteo, Tuta, Mailfence) sort with server-side rules you write yourself, which is transparent but does no learning, and only Infomaniak categorises promotions for you.
Why people leave SaneBox
SaneBox is one of the few email tools that does exactly one thing and has done it since 2010. It watches which mail you open and answer, decides what is unimportant, and moves that mail into a folder called SaneLater, with a daily digest so nothing vanishes. Because the sorting happens as an ordinary mail folder, it works in whatever app you already use.
It is also a US company, SaneBox, Inc., whose terms are governed by the laws of Massachusetts. SaneBox says it analyses message headers only and never stores the text of your messages, and there is no reason on this page to doubt that. Headers are still sender, subject and date for every message you receive, and the importance score behind SaneLater is learned from your behaviour rather than from rules you wrote.
This is a small market, and this page says so. There is no European copy of SaneBox, only eleven tools that cover parts of the job in different ways: a prompt-driven add-on, a screener and unsubscriber, an email app with a Smart Inbox, an AI inbox assistant, and seven mail providers whose own filters sort mail for you. Only the first four connect to a mailbox you already have.
- Your mail metadata passes through a US company SaneBox, Inc. states that it only reads headers, and that the body of a message is never stored. What that leaves is the shape of your correspondence: who writes to you, how often, and under which subject line. Its terms are governed by Massachusetts law with venue in Boston, and its privacy policy still describes transfers from the EU and EEA to the United States under Privacy Shield, a framework the Court of Justice struck down in 2020.
- Importance is inferred, not instructed SaneBox decides what matters by watching which emails you open, answer and how quickly. That is why it needs no setup, and also why you cannot read the rule that moved an email out of your inbox. SaneBox does offer custom filtering rules alongside the learning, but the headline behaviour is a model you cannot inspect.
- A paid subscription, tried for free first SaneBox offers a free trial with no credit card, and continuing means a subscription. The pricing table on its own site is rendered in the browser and could not be checked for this page, so no figure is quoted here. Check the current price before you compare.
- The Europeans each cover a different slice Nothing on this page is a drop-in replacement. Spark is an app you switch to, Fyxer works with Gmail and Outlook only, the mail providers (Infomaniak, Mailbox.org, Proton Mail, Runbox, Posteo, Tuta and Mailfence) need you to move your mailbox, Leave Me Alone screens and unsubscribes rather than learning, and AI Email Filter sorts by your own written descriptions rather than by learned importance. Which of those is a fair swap depends on which part of SaneBox you actually use.
What you have to replace, not just match
Decide which SaneBox feature you rely on, because they separate cleanly. Sorting unimportant mail into a side folder is the core, and Spark, AI Email Filter, Fyxer and server-side filters all do some version of it. Snooze, reminders when someone has not replied and one-click unsubscribe are the extras, and Spark covers snooze and reminders better than anything else here.
If you move, keep SaneBox running in parallel for a week. Its SaneLater folder is an ordinary mail folder, so you can compare what the new tool files against what SaneBox files before you cancel. Nothing in your mailbox is locked inside SaneBox, because the mail stays on your own mail server throughout.
The alternatives compared
| Position | Tool | Headquarters | Pricing | Jurisdiction |
|---|---|---|---|---|
| #4 | Infomaniak | Geneva, Switzerland | From CHF 5.75/month (kSuite); kDrive Solo free | Switzerland (adequacy decision, outside the EEA) |
| #5 | Mailbox.org | Berlin, Germany | From about €1/month (Light) to €9/month (Business) | EU (Germany) |
| #6 | AI Email Filter | Zürich, Switzerland | 200 free classifications (one-time trial), then $6/month or $60/year, two mail accounts included, +$2.50/month per extra account | Switzerland (adequacy decision, outside the EEA) |
| #7 | Proton Mail | Geneva, Switzerland | Free (500MB) / from about €4.99/month | Switzerland (adequacy decision, outside the EEA) |
| #8 | Runbox | Oslo, Norway | From €19.95/year | EEA, not EU (Norway) |
| #9 | Posteo | Berlin, Germany | €1/month flat rate | EU (Germany) |
| #10 | Tuta | Hanover, Germany | Free (1GB) / from about €3/month | EU (Germany) |
| #11 | Mailfence | Brussels, Belgium | Free (500MB) / from about €2.50/month | EU (Belgium) |
How each alternative compares to SaneBox
Spark
the one that also replaces your mail app
Best for: People who will switch app and want snooze, reminders and a smart inbox together
Spark is an email app run by Spark Mail Limited, registered in Dublin with Irish law governing its terms and a data protection officer in Hamburg. Its free plan includes a Smart Inbox, and its feature list adds Priority, Group by Sender and automated Newsletter and Notification inboxes, which together do most of what SaneLater does inside the app.
The difference is where it lives. SaneBox is a folder service that works in any app, while Spark asks you to use Spark on Mac, iOS, Android or Windows. That is a bigger change than adding a service, but it brings snooze, send later and follow-up reminders in the same app.
Spark says some features process data on its servers, and that its AI providers retain inputs for up to thirty days and do not train on them. Paid plans start from €8.25 per user per month on annual billing, with the free tier keeping the Smart Inbox.
What Spark does better than SaneBox
- Irish company under EU law, where SaneBox is a Massachusetts company
- Smart Inbox on the free plan, so you can test it without a card
- Snooze, send later and follow-up reminders in the same app
- Covers Mac, iOS, Android and Windows with one account
Where Spark is a step down from SaneBox
- It is a mail client you must adopt, not a service that works inside the one you have
- Sorting only happens in Spark, so other apps and webmail still show the full inbox
- Some features process mail on Spark servers rather than only on your device
- Paid tiers start from €8.25 per user per month on annual billing, with Pro well above that
Standout against SaneBox. It is the only option here with a Smart Inbox on a free plan, in exchange for changing your mail app.
Leave Me Alone
a screener, digests and unsubscribe for any mailbox, from Estonia
Best for: People whose inbox is mostly newsletters and unwanted senders, on Gmail, Outlook or any IMAP mailbox
Leave Me Alone is owned and operated by Squarecat OÜ, an Estonian company (registry number 14434179) whose terms are governed by Estonian law. It connects to Gmail, Google Workspace, Outlook and Microsoft 365 accounts, and to any other mailbox that works over IMAP, so it does not force a change of mail app or provider.
Three of its features overlap with SaneBox. The Screener holds mail from unfamiliar senders outside your inbox until you approve them, Rollups bundle chosen senders into a single digest on a daily, weekly or custom schedule, and the Unsubscriber removes you from mailing lists in bulk instead of just filing them. There is also a Spam Blocker and a Private Emails feature for disposable addresses.
It does not learn which of your mail is important, and it has no snooze or reminders.
The privacy page says the Unsubscriber and Screener use metadata only, while Rollups read the content of the senders you pick and keep it until three months after delivery, and the Spam Blocker reads message bodies. The company runs mostly on DigitalOcean, with some storage and Google document processing in the United States, so this is a European company but not an entirely European data path.
What Leave Me Alone does better than SaneBox
- Estonian company under EU law, where SaneBox is a Massachusetts company
- Works with Gmail, Outlook and any IMAP mailbox, with no change of app
- Rollups and the Screener cover SaneLater and the daily digest
- Can unsubscribe you from lists, where SaneBox only files the mail
- A free tier lets you unsubscribe from 10 emails without a card
Where Leave Me Alone is a step down from SaneBox
- No learned importance score: you choose the senders to roll up or screen
- No snooze or reminders when someone has not replied
- Some features read message content, and parts of the infrastructure are in the US
- Paid plans only after the free 10 unsubscribes, or a $19 seven-day pass
Standout against SaneBox. It is the only option here built around unsubscribing and screening senders, rather than sorting the mail you already get.
Fyxer
labels and drafts for Gmail and Outlook, at a higher price
Best for: Busy Gmail or Outlook users who want replies drafted as well as mail sorted
Fyxer is run by Fyxer AI Limited, registered in England and Wales under company number 15189973 with a London registered office, and its terms are governed by English law. It is a UK company, so outside the EU and under the UK adequacy decision.
It labels every new email and lifts the one that matters, which is the SaneBox job, and then goes further with drafted replies in your tone, meeting notes and a follow-up list. The sign-up pages offer Gmail and Outlook only, so a mailbox at an IMAP provider is out of scope.
Fyxer says it holds SOC 2 Type II and ISO 27001 certification and does not use your data to train third-party models, both its own statements. The Pro plan is listed at $37 per person per month on annual billing, or $49 monthly, with a free plan that uses credits and a 14-day trial.
What Fyxer does better than SaneBox
- Drafts replies and meeting notes as well as sorting, which SaneBox does not
- Company registered at Companies House in London, outside Massachusetts law
- Publishes SOC 2 Type II and ISO 27001 claims on its security page
- Labels mail inside Gmail and Outlook with no change of app
Where Fyxer is a step down from SaneBox
- Gmail and Outlook only, so Mailbox.org, Posteo and other IMAP providers cannot use it
- UK, not EU, so it relies on the UK adequacy decision
- Starts at $37 per person per month on annual billing, far above AI Email Filter
- Sorting is metered in credits, with five emails per credit
Standout against SaneBox. It does the most per mail of anything here, drafting your replies, and is the only one that works only with Gmail and Outlook.
- Which law reaches it. Switzerland (adequacy decision, outside the EEA). SaneBox is run from the United States, so the CLOUD Act obliges the provider to hand over data on a valid order regardless of which country the servers are in.
- Where the data sits. Switzerland (Geneva, Winterthur).
- Source code. Closed source, as SaneBox is.
- Independently checked. ISO 27001.
Best for: People who would move to a Swiss provider and want some automatic sorting without an add-on
Infomaniak is a Geneva hosting company whose Mail service (kMail) comes with its own sorting. Its help pages describe a spam folder, filters that sort promotional and social network messages into their own categories, and a Sieve editor for rules you write yourself, as well as block and allow lists for single addresses or whole domains.
That is the nearest any mail provider here gets to SaneBox without an add-on, because some of the sorting happens without you writing a rule. It is still category filtering, not a model that learns what you answer, and there is no digest, snooze or reminder feature in what we could verify.
It is a mailbox, so using it means moving your mail to Infomaniak, and the help pages we read did not state which plans include which filters, so check that before you commit.
What Infomaniak does better than SaneBox
- Promotional and social mail is categorised by the provider, with no rule to write
- Sieve rules for anything the categories do not cover
- Swiss company with Swiss hosting, outside US law
- Runs on the server that holds your mail, so no third party sees it
Where Infomaniak is a step down from SaneBox
- Category filters, not a learned importance score, and no digest
- No snooze or reminders in the filtering we could verify
- You must move your mailbox to Infomaniak to use it
- Plan limits for the filters are not clear from the help pages
Standout against SaneBox. It is the only mail provider here that sorts promotional and social mail by itself, before you write a single rule.
- Which law reaches it. EU (Germany). SaneBox is run from the United States, so the CLOUD Act obliges the provider to hand over data on a valid order regardless of which country the servers are in.
- Where the data sits. Germany (green energy).
- Source code. Closed source, as SaneBox is.
Best for: People ready to move mailbox and write a few rules once
Mailbox.org is the mailbox, not an add-on, run by Heinlein Support GmbH in Berlin and priced from about €1 a month. Its filtering is Sieve: server-side rules, set up under Rules in its web interface or with any client that speaks the Managesieve protocol, that file mail into folders as it arrives.
That is the opposite end of the spectrum from SaneBox. There is no learning and no digest, only rules you write, such as sender, subject or list header to folder. In exchange nothing leaves the server that already stores your mail, and the rule that moved a message is one you can read.
Its own help says Sieve rules apply to the inbox only, and that it cannot support individual filter configurations. If the sorting you need is a handful of senders and newsletters, a few rules do it with no third party at all.
What Mailbox.org does better than SaneBox
- Runs on the mail server itself, so no third party sees your mail
- Rules you can read, edit and move to other Sieve servers
- German company with German hosting, where SaneBox is under Massachusetts law
- Around €1 a month for the mailbox, filters included
Where Mailbox.org is a step down from SaneBox
- Rule-based only: no learning, no digest, no importance score
- You must move your mailbox to Mailbox.org to use it
- Sieve rules apply to the inbox only, and support does not help with individual rules
- No snooze, reminders or unsubscribe tooling in the filters
Standout against SaneBox. It is the only option here where the sorting runs on the same server as your mail, with rules you can read.
- Which law reaches it. Switzerland (adequacy decision, outside the EEA). SaneBox is run from the United States, so the CLOUD Act obliges the provider to hand over data on a valid order regardless of which country the servers are in.
- Where the data sits. Finland (Hetzner), as stated by the vendor; not published on its own site.
- Source code. Closed source, as SaneBox is.
Best for: IMAP users who want a sorter on top of Mailbox.org, Posteo or any mailbox
AI Email Filter is an add-on, like SaneBox: it connects to an IMAP mailbox, reads each incoming message and moves it to the folder whose plain-language description fits best. Mailbox.org, Posteo and Fastmail are named in its own documentation, so it fits the European providers this site lists. It is not a mail provider and does not host a mailbox.
It is run by Reto Odoni in Zürich, and Swiss law and the Swiss adequacy decision apply. The company form and a registry number are not published, and the vendor says hosting is with Hetzner in Finland, which the site itself does not state. You can bring your own language model, so mail content never leaves your infrastructure, or run the dockerised stack on your own server.
It is a free listing on this site, with no ranking boost. It sorts by what you write instead of what it learns, so it needs more setup than SaneBox and gives you a readable reason for every move, logged with a one-click undo. Pricing is $6 a month or $60 a year after 200 free classifications, described as a one-time trial.
What AI Email Filter does better than SaneBox
- Works on any IMAP mailbox, including self-hosted mail
- Prompts you write and can read, instead of importance learned from your behaviour
- Bring your own language model or self-host, so content can stay with you
- Every move is logged and can be undone in one click
- Swiss, with an adequacy decision, where SaneBox is under Massachusetts law
Where AI Email Filter is a step down from SaneBox
- Needs setup: you describe every folder, where SaneBox needs nothing
- No snooze, reminders or one-click unsubscribe, which SaneBox bundles
- A one-person operation with no company form or registry number published
- Outlook sign-in is still listed as coming, and the 200 free classifications are a one-time trial
Standout against SaneBox. It is the only option here that sorts any IMAP mailbox from descriptions you write, and lets you keep the language model under your own control.
- Which law reaches it. Switzerland (adequacy decision, outside the EEA). SaneBox is run from the United States, so the CLOUD Act obliges the provider to hand over data on a valid order regardless of which country the servers are in.
- Where the data sits. Switzerland, Germany.
- Source code. Open source, where SaneBox is not: you can read what it does rather than take the description on trust.
- Independently checked. Independently audited, open source.
Best for: Proton users who want a few filters, or a full Sieve script, and accept that nothing learns
Proton Mail is run by Proton AG in Geneva, under Swiss law with courts in the Canton of Geneva for non-US users. Its filtering has three levels: an always-move or always-label action on any sender, custom filters with conditions and actions you set, and Sieve for advanced scripts.
The free plan lets you create as many filters as you like but keep only one active at a time. Paid plans allow up to 250 active filters. None of it learns from your behaviour, so it covers the SaneLater folder only for senders you name.
Proton is a mailbox, so using these filters means moving there, and third-party IMAP apps and add-ons can reach it only through the Proton Mail Bridge, which is for paid subscribers on desktop.
What Proton Mail does better than SaneBox
- Swiss company and end-to-end encryption between Proton accounts
- Simple filters, custom filters and Sieve in one place
- Up to 250 active filters on paid plans
- Rules you can read, where SaneBox decides by inference
Where Proton Mail is a step down from SaneBox
- No learning, digest, snooze or reminders
- Only one active filter on the free plan
- You must move your mailbox, and IMAP add-ons need the paid desktop Bridge
- Auto-replies are for paid plans only
Standout against SaneBox. It is the only option here that pairs filters with an encrypted mailbox, at the cost of the free plan allowing just one active filter.
- Which law reaches it. EEA, not EU (Norway). SaneBox is run from the United States, so the CLOUD Act obliges the provider to hand over data on a valid order regardless of which country the servers are in.
- Where the data sits. Norway (renewable hydroelectric).
- Source code. Open source, where SaneBox is not: you can read what it does rather than take the description on trust.
- Independently checked. Runbox 7 webmail open source.
Best for: People who want a long-running independent mailbox and are happy to write their own sorting rules
Runbox is run by Runbox Solutions AS in Oslo (organisation number 996877027) and has operated since 2000. Norway is in the EEA, so GDPR applies, though it is not an EU member state.
Its features page describes spam filtering and manual filters that sort incoming mail into folders, forward it or block senders, with no stated limit on the criteria or the number of filters. The page does not mention Sieve, so we do not claim it.
Like the other providers here, it sorts by rules you write rather than by learned importance, and it is a mailbox you would have to move to. It supports IMAP and SMTP, so standard clients work.
What Runbox does better than SaneBox
- Unlimited custom filters to sort, forward or block mail
- Norwegian company with Norwegian hosting, outside US law
- IMAP and SMTP support, so any standard client works
- Spam filtering and virus scanning on every incoming message
Where Runbox is a step down from SaneBox
- No learning, digest, snooze or reminders
- You must move your mailbox to Runbox
- Norway is EEA, not EU, so EU law applies through the EEA agreement
- No dedicated mobile apps, so you use the mobile web or an IMAP app
Standout against SaneBox. It is the oldest independent mailbox here, and the one that states plainly that its filters have no cap.
- Which law reaches it. EU (Germany). SaneBox is run from the United States, so the CLOUD Act obliges the provider to hand over data on a valid order regardless of which country the servers are in.
- Where the data sits. Germany (100% green energy).
- Source code. Closed source, as SaneBox is.
Best for: Posteo users with a few senders and subjects to file
Posteo is a Berlin mailbox at €1 a month, and its filters are the simplest here. You build a filter in the settings from up to 16 rules, matching on sender, subject or other headers, and tell it which folder to use. It applies to newly arriving mail only, so the existing inbox is not reshuffled.
It is the least like SaneBox and the most private. Nothing is learned, nothing leaves the Posteo servers, and there is no third party in the path. Choose it only if your sorting problem is a short list of senders, because there is nothing to scale up to a large inbox.
Like Mailbox.org it is a mailbox, so using its filters means moving your mail there, and Posteo offers no custom domains, so the address changes too.
What Posteo does better than SaneBox
- Filters run on the Posteo server, with no third party involved
- Plain, readable rules of up to 16 per filter
- German company with German hosting, outside US law
- A flat €1 a month, anonymous payment accepted
Where Posteo is a step down from SaneBox
- Only applies to newly arriving mail, not what is already in the inbox
- No learning, digest, snooze or reminders
- You must move to a posteo.de address, as custom domains are not supported
- Needs a rule per sender, which does not scale to a busy inbox
Standout against SaneBox. It is the cheapest and most private option here, and the one with the least capability to sort mail you have not named in advance.
- Which law reaches it. EU (Germany). SaneBox is run from the United States, so the CLOUD Act obliges the provider to hand over data on a valid order regardless of which country the servers are in.
- Where the data sits. Germany.
- Source code. Open source, where SaneBox is not: you can read what it does rather than take the description on trust.
Best for: Tuta users who want a few senders and domains filed automatically
Tuta is run by Tutao GmbH in Hanover (Hanover district court, HRB 208014). Its inbox rules send new mail into a folder based on a sender address or domain, or on keywords in the subject. Inbox rules are a paid feature.
That is the narrowest toolset on this page: two kinds of condition and one action, with no digest, no learning and no snooze. It is also the only option here that cannot be combined with an outside sorter, because Tuta does not support IMAP, POP3 or SMTP, and mail is read only in its own web, desktop and mobile apps.
Choose it for the encryption and the German jurisdiction, not for sorting. If sorting is the main goal, a provider with Sieve or an add-on on top of an IMAP mailbox does more.
What Tuta does better than SaneBox
- German company with German hosting, outside US law
- End-to-end encrypted mailbox with open-source apps
- Inbox rules are simple enough to set up in a minute
- Free plan available to try the mailbox
Where Tuta is a step down from SaneBox
- Rules match only sender, domain or subject keywords
- No learning, digest, snooze or reminders
- No IMAP, so no third-party sorter or client can connect
- Inbox rules need a paid plan
Standout against SaneBox. It is the only option here that is fully closed to outside tools, which protects the mail and rules out an add-on sorter.
- Which law reaches it. EU (Belgium). SaneBox is run from the United States, so the CLOUD Act obliges the provider to hand over data on a valid order regardless of which country the servers are in.
- Where the data sits. Belgium.
- Source code. Closed source, as SaneBox is.
Best for: Mailfence users with a defined set of senders and conditions, on a paid plan
Mailfence is a Belgian mailbox, with a Brussels address in its help pages. Its filters let you set multiple conditions, decide whether all or any must match, and attach several actions. Its knowledge base says the free plan includes no filters, the Base, Entry and Pro plans allow 50, and Ultra allows 100.
We could not read the full list of conditions and actions, and could not reach the main site when checking, so this page makes no claim beyond what the knowledge base states. It supports IMAP, POP3 and SMTP, so clients and add-ons can connect.
It sorts by rules you write, not by learned importance, and it has no digest or snooze. It is the weakest SaneBox substitute on this page, included because its multi-condition filters beat the single-rule sorting of some mailboxes here.
What Mailfence does better than SaneBox
- Several conditions and actions per filter, with all-or-any matching
- Belgian company, inside the EU
- IMAP, POP3 and SMTP support for outside clients
- Up to 50 filters on paid plans, 100 on Ultra
Where Mailfence is a step down from SaneBox
- The free plan has no filters at all
- No learning, digest, snooze or reminders
- You must move your mailbox to Mailfence
- We could not verify the exact conditions and actions offered
Standout against SaneBox. It lets you combine several conditions and actions per filter, but only on a paid plan.
What actually breaks when you switch
The hard part of leaving SaneBox is not the mail, which never left your mail server, but the habit. SaneLater has taught you to ignore one folder, and a new sorter will file different mail, so expect a fortnight of checking the side folder for things that matter.
Moving to a prompt-based sorter means writing the folder descriptions yourself. Start with three or four folders, run the preview before you let it move anything, and watch the history for a week before you add more.
Giving any add-on access means handing it a mailbox credential or an OAuth grant, so check what it stores. AI Email Filter says it encrypts IMAP credentials at rest and does not keep message bodies, and it can be self-hosted. Spark and Fyxer use the sign-in of your provider.
Is there a European tool that works exactly like SaneBox?
Not that we could verify. SaneBox learns from your behaviour, sits on any mailbox as a folder service and has been doing it for sixteen years. The nearest in architecture is AI Email Filter, which also sits on any IMAP mailbox, but it sorts by prompts you write rather than by importance it learns. Leave Me Alone covers the digest and the unwanted senders, and Infomaniak is the only mail provider that categorises promotional and social mail without a rule.
Spark and Fyxer sort by model as well, but each ties you to an app or to a Gmail or Outlook account. Every tool here is a partial answer, and each entry says which part. We left out the ones that do not do the job.
How does a prompt-based filter differ from SaneBox?
SaneBox asks you to do nothing and infers importance from what you open and answer. AI Email Filter asks you to describe each folder in plain language, for example invoices, newsletters or things a client sent, and a language model files each incoming message accordingly. You get control and a readable reason, and you give up the zero-setup learning.
Both move mail with ordinary IMAP actions, so the mailbox stays the source of truth. AI Email Filter logs every move in a history tab and lets you undo it in one click, and it keeps only subject, sender, date and the chosen category long term.
Do I give up my mail provider if I use one of these?
No for AI Email Filter, Leave Me Alone and SaneBox, which sit on top of the mailbox you already have, and partly for Spark and Fyxer, which connect to it. The seven mail providers (Infomaniak, Mailbox.org, Proton Mail, Runbox, Posteo, Tuta and Mailfence) are the exception: they are the mailbox, so using their filters means moving your mail there.
That is a reasonable trade if you were going to leave Gmail anyway, because their filters then replace SaneBox entirely. It is a poor trade if you only wanted a sorter.
Where does my mail go when an AI tool sorts it?
To the tool's servers, and for the AI ones to a language model.
AI Email Filter sends subject, sender and a short preview of the body to the model, lets you point it at your own model so that content never leaves your infrastructure, and can be self-hosted. Spark processes some features on its servers and says its AI providers keep inputs for at most thirty days and do not train on them. Fyxer says your data is not used to train third-party models.
The server-side filters at the mail providers (Infomaniak, Mailbox.org, Proton Mail, Runbox, Posteo, Tuta, Mailfence) are the exception: they run on the mail server that already holds your mail, so no third party sees anything. Leave Me Alone says its Unsubscriber and Screener use metadata only, while its Rollups and Spam Blocker read message content, and part of its infrastructure is in the United States.
Which one to pick
If you want an add-on that sorts any IMAP mailbox by what each folder is for, AI Email Filter is the one, and it suits Mailbox.org and Posteo users well. Expect to write your own folder descriptions. If the problem is newsletters and unknown senders rather than ordinary mail, Leave Me Alone is aimed at exactly that.
If you also want snooze, reminders and a better mail app, Spark does more than SaneBox in one place, as long as you are happy to change app.
If your inbox is Gmail or Outlook and replies are the real time sink, Fyxer is aimed at that, at a higher price. If you only have a few senders to file, a provider such as Infomaniak, Mailbox.org, Proton Mail, Runbox or Posteo does it with plain rules and no third party. Tuta and Mailfence are the weakest sorters here and worth choosing for other reasons.
Be realistic about the gap. SaneBox is a mature, narrow product, and none of these eleven reproduces it exactly. Switch if the US jurisdiction of your mail metadata bothers you, and keep SaneBox if what you want is the learned importance it does with no setup.
Frequently Asked Questions
Spark is the best all-round answer if you will change mail app, because its Smart Inbox is free and it adds snooze and reminders.
Leave Me Alone suits a newsletter-heavy inbox on any mailbox, and AI Email Filter sorts any IMAP mailbox into folders by prompts you write rather than by learned importance. If you are happy to write plain rules and move your mailbox, Infomaniak, Mailbox.org, Proton Mail, Runbox, Posteo and Mailfence all file mail on the server. None is a drop-in copy.
Yes. Its privacy policy and footer name SaneBox, Inc., its terms are governed by the laws of the Commonwealth of Massachusetts, and disputes go to the courts in and around Boston. SaneBox says it analyses only message headers and never stores message bodies.
By its own description it analyses headers, meaning sender, subject and date and patterns such as what you open and answer, to decide what is important. It says optional features that retrieve the body never store it, and that its employees do not look at message content. What it does see is the metadata of every message.
Yes, any tool that connects over IMAP can. AI Email Filter names Mailbox.org, Posteo and Fastmail in its own documentation. Mailbox.org and Posteo also have their own server-side filters, so you may not need an add-on at all if the rules you want are simple.
The first 200 classifications are free, and the site describes that as a one-time trial. After that it is $6 per month or $60 per year, with two mail accounts included and $2.50 per month for each extra account. You can bring your own language model.
Spark has a free plan that includes its Smart Inbox, and its pricing page lists Plus at €8.25 per user per month on annual billing, with Pro above that. Fyxer lists a free plan that uses credits, and Pro at $37 per person per month on annual billing, or $49 billed monthly, with a 14-day trial. Prices are shown in euros and dollars respectively and can change.
No. Its sign-up and pricing pages offer Gmail and Outlook only, so it cannot sort a mailbox at Mailbox.org, Posteo or any other IMAP provider. If you use one of those, AI Email Filter or a server-side filter is the practical option.
It is Swiss, not EU. Its imprint names Reto Odoni as owner, with an address in Zürich, and no company form or registry number is published. The vendor says its servers are with Hetzner in Finland, which is inside the EU, but that statement is not on the website itself. Switzerland has an adequacy decision from the European Commission.
Leave Me Alone does, and is run by Squarecat OÜ in Estonia. Its Unsubscriber removes you from mailing lists in bulk, the Screener holds mail from unfamiliar senders outside your inbox until you approve them, and Rollups bundle chosen senders into a digest. It works with Gmail, Outlook and any IMAP mailbox. It does not learn importance the way SaneBox does, and part of its infrastructure is in the United States.
Any that offers IMAP, which we verified for Mailbox.org, Runbox, Posteo and Mailfence (check Infomaniak's IMAP settings before relying on it). Tuta does not support IMAP, so no outside tool can connect to it, and Proton Mail allows IMAP only through its Bridge app for paid subscribers. For those two, the built-in rules are the realistic choice.
Yes in every case here. All of these tools move mail with standard mail operations, so your mail stays in your mailbox. AI Email Filter keeps a history and an undo for each move, and with any of them you can simply move the messages back and disconnect the account.
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