European Alternatives to Microsoft To Do
Looking for a European alternative to Microsoft To Do? The Microsoft Services Agreement states that for services other than Skype you contract with Microsoft Corporation, One Microsoft Way, Redmond, WA 98052, U.S.A. The Microsoft To Do product pages themselves could not be read when we checked, so no feature or price claims are made here.
The European to-do list apps below are run from Germany, Switzerland, Poland and the United Kingdom, publish their prices in dollars, euros or pounds, and cover personal lists, day planning, open-source apps and team task boards.
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, the UK, Switzerland or Israel, and processes customer data in Europe or Israel. 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. Vendors can pay for more visibility, higher up on the review pages; it never affects which tools are listed. Editorial policy
12 European Alternatives to Microsoft To Do
Things
Stuttgart task manager for Apple devices with Things Cloud
Superlist
Berlin list app with notes, shared lists and a free plan
Super Productivity
Free open-source task app with time tracking and local data
Structured
Berlin day planner that puts tasks on one visual timeline
Nozbe
Gdynia task and project app with a free plan
Amazing Marvin
Swiss customisable task manager built for ADHD workflows
Vikunja
Open-source to-do app you can host yourself
Morgen
Swiss planner that joins calendars and tasks with AI
Zenkit
Task and project suite with list, board and calendar views
MeisterTask
Kanban-style task board for teams from Munich
Nextcloud
Self-hosted cloud suite that includes a Tasks app
Kanbanchi
UK kanban boards inside Google Workspace and Microsoft 365
Key takeaways
- Microsoft To Do is contracted with Microsoft Corporation, One Microsoft Way, Redmond, WA 98052, U.S.A., according to the Microsoft Services Agreement, which covers every service other than Skype.
- Of the twelve European to-do tools on this page, nine have their seat in the EU: eight in Germany and Nozbe in Poland; Amazing Marvin and Morgen are Swiss and Kanbanchi is British.
- Super Productivity is free with no premium tier, needs no account and keeps data on your device by default, and Vikunja is AGPLv3 with a free self-hosted edition.
- Things runs only on Apple devices, while Amazing Marvin, Superlist, Super Productivity and Morgen cover Windows, Mac and mobile platforms between them.
- Pricing on this page is mostly in dollars: Superlist, Nozbe, Amazing Marvin, Morgen and Kanbanchi quote dollars, whereas Vikunja, Zenkit and MeisterTask quote euros.
Why people leave Microsoft To Do
Microsoft To Do is a task list application from Microsoft Corporation of Redmond, Washington. The Microsoft Services Agreement, the one Microsoft document we could read, says that for services other than Skype you contract with Microsoft Corporation, One Microsoft Way, Redmond, WA 98052, U.S.A. That is the legal fact this page rests on: for To Do your counterparty is a US company, whichever country your laptop or phone sits in.
The To Do product pages themselves were out of reach when we checked. The address todo.microsoft.com and the Microsoft product page returned an error or an empty page to our fetch, so we state nothing about To Do's features, platforms, limits or prices. What follows about the incumbent is limited to the contracting party and to what a task list app does in general. Everything about the twelve European tools comes from their own pages.
People look past a US task list for reasons that have little to do with checkboxes. A list ends up holding client names, medical appointments, half-formed plans and the occasional password pasted into a note. Some want that under a European contract and a regulator who answers in their language. Some want the list on their own server. Some are tired of a flat list and want the day laid out on a timeline or a calendar.
- The contracting party is a US corporation Under the Services Agreement the party behind To Do is Microsoft Corporation in Redmond, not a European subsidiary. For a private list that may not matter to you. For a freelancer who keeps client tasks in it, or a school or clinic that lets staff use it informally, the question of which law governs the data and which authority hears a complaint has a plain answer: US company, US contract.
- Nine of the twelve European tools sit in an EU member state Things, Superlist, Super Productivity, Structured, Vikunja, Zenkit, MeisterTask and Nextcloud are German, and Nozbe is Polish. Amazing Marvin and Morgen are Swiss, and Kanbanchi is registered in England and Wales, so those three fall under adequacy decisions instead of EU law directly. The page tells you which is which, so you can choose the legal seat deliberately.
- You can pick where the data lives, or keep it off a vendor server Super Productivity keeps data on your device unless you switch on Super Sync, whose servers the privacy policy places in Germany. Vikunja and Nextcloud can run on hardware you control. MeisterTask names Frankfurt and Zenkit names Germany. Morgen names Switzerland, though on Google Cloud. Several others do not state a location at all, and we say so in each comparison.
- The planning model is not the same everywhere A flat checklist is only one design. Structured puts tasks and calendar events on one timeline, Morgen blocks time around several calendars, Amazing Marvin lets you assemble your own workflow, and Nozbe, Zenkit and MeisterTask turn the list into shared projects. If the real reason you are leaving is that a plain list no longer fits how you work, the alternatives differ more than the logos suggest.
What you have to replace, not just match
Because we could not read what To Do offers, we cannot give you a feature checklist to match. Open your own account and write down what you actually use: due dates and reminders, recurring tasks, shared lists with other people, the daily planning view, attachments, mobile apps. Then check each item against the tool you are considering. The cards on this page list platforms and plan limits, and those are the usual places where a switch hurts.
Think about people as much as features. A list that only you read can move to Things, Structured or Super Productivity in an afternoon. A list shared with a partner, a team or a client needs the other side to accept a new app, and then the plan matters: Superlist's free plan allows up to 5 people per shared list, MeisterTask's free tier stops at three project members, and Nozbe's free plan limits sections and tags.
Finally, decide where your calendar lives. Structured imports calendar events, Morgen is built around several calendars, and Nextcloud brings its own calendar and contacts. Moving tasks without deciding how they meet your calendar is the most common reason people drift back to the app they left.
The alternatives compared
| Position | Tool | Headquarters | Pricing | Jurisdiction |
|---|---|---|---|---|
| #1 | Things | Stuttgart, Germany | Price set in US dollars on the App Store and converted by Apple per country; no amount shown on the pages we read | EU (Germany) |
| #2 | Superlist | Berlin, Germany | Free $0 with up to 5 lists; Basic $5 per person a month ($59 yearly); Super $21 per person a month ($249 yearly) | EU (Germany) |
| #3 | Super Productivity | Berlin, Germany | Free; the pricing page states no trials, no premium tiers and no hidden costs | EU (Germany) |
| #4 | Structured | Berlin, Germany | Free start stated; paid plan prices not shown on the pages we read | EU (Germany) |
| #5 | Nozbe | Gdynia, Poland | Free plan with no time limit; Premium $9 per user a month (+taxes) | EU (Poland) |
| #6 | Amazing Marvin | not stated on the pages we read, Switzerland | Marvin Pro $8 a month, or $96 billed yearly; 14-day free trial, no credit card | Switzerland (adequacy decision, outside the EEA) |
| #7 | Vikunja | Lübeck, Germany | Free self-hosted / €4 per month personal, €5/user/month for an organisation | EU (Germany) |
| #8 | Morgen | Rapperswil SG, Switzerland | Individuals $30 a month or $15 a month billed yearly; Teams $25 per seat monthly or $10 yearly, minimum 2 seats; 14-day free trial | Switzerland (adequacy decision, outside the EEA) |
| #9 | Zenkit | Karlsruhe, Germany | Free plan / from about €9/user/month | EU (Germany) |
| #10 | MeisterTask | Munich area, Germany | Free tier / from about €6.50/user/month | EU (Germany) |
| #11 | Nextcloud | Stuttgart, Germany | Free self-hosted / Enterprise plans on request | EU (Germany) |
| #12 | Kanbanchi | Dartford, United Kingdom | Essential $5.99 a month billed monthly or $3.97 a month billed annually; free trial offered | United Kingdom (adequacy decision, outside the EEA) |
How each alternative compares to Microsoft To Do
Best for: Individuals on Mac, iPhone and iPad who plan alone and want one tidy app
Things comes from Cultured Code GmbH & Co. KG, Dieselstraße 28 in Stuttgart, and its Things Cloud terms apply German law to customers with a seat in an EU member state. Where Microsoft To Do names a Redmond corporation, Things names a Stuttgart company and the Baden-Wuerttemberg data protection authority as the place to complain.
The price is the awkward part. Cultured Code sets it in US dollars on the App Store and Apple converts it per country, so we cannot give an amount. Things Cloud syncs between devices, and Mail to Things turns forwarded emails into tasks. There is no sign of shared lists, so a household list needs another app.
What Things does better than Microsoft To Do
- Names a German legal entity and an authority for complaints
- Mail to Things converts forwarded email into tasks
- Apps for Watch and Vision Pro as well as Mac, iPhone and iPad
Where Things is a step down from Microsoft To Do
- Does not run on Windows or Android
- Shows no price and no hosting location on the pages we read
- No shared lists or team features seen
Standout against Microsoft To Do. Things is the only tool here that ships an app for Apple Vision Pro.
Best for: Individuals and small groups who keep tasks and meeting notes together on several platforms
Superlist Software GmbH sits at Joachimstraße 7 in Berlin, and its Terms of Service use German law with Berlin as the venue for business customers. The homepage says it is made by the creators of Wunderlist. Compared with a Microsoft contract, this gives you a German counterparty for lists and notes in the same place.
The free plan allows 5 lists, up to 5 people per shared list, and unlimited tasks and notes. Basic at $5 per person a month lifts the list limit; Super at $21 adds the AI meeting notes. The privacy policy lists Hetzner Online GmbH for storage but also several US providers, such as DigitalOcean, LLC, so processing is not purely European.
What Superlist does better than Microsoft To Do
- German contract with a Berlin seat and a data processing agreement on request
- Free plan with unlimited tasks and notes
- Talk captures a task by voice
- Apps for Mac, iOS, Android and web
Where Superlist is a step down from Microsoft To Do
- US sub-processors named in the privacy policy
- Free plan stops at 5 lists
- AI features cost $21 per person a month
Standout against Microsoft To Do. Superlist is the only tool here that merges meeting notes and task lists in one document.
Best for: Developers and privacy-minded individuals who want free software and optional sync in Germany
Super Productivity is published by one person, Johannes Millan, at Hauptstraße 4H in Berlin. There is no company register entry behind it. Against Microsoft To Do that is a different kind of counterparty: nobody large, but a named German individual and a privacy policy stating that data stays on your device by default.
The pricing page promises no trials, no premium tiers and no hidden costs. Tasks, projects, a Pomodoro timer, time tracking and a schedule planner come without an account. Super Sync servers are in Germany, and you can use Dropbox or WebDAV instead. Team features are not described, and the licence name is not stated on the pages we read.
What Super Productivity does better than Microsoft To Do
- Free with no premium tier, trial or account
- Data stays on your device by default
- Time tracking and a Pomodoro timer built in
- Apps for Windows, macOS, Linux, Android, iOS and web
Where Super Productivity is a step down from Microsoft To Do
- Publisher is an individual with no stated support contract
- No shared lists or team features described
Standout against Microsoft To Do. Super Productivity is the only tool here that works offline with no account and no price.
Best for: People who think of their day as a sequence of time slots and not as a list
Structured is run by unorderly GmbH, Mainzer Strasse 22 in Berlin, registered as HRB 245195 B at the Amtsgericht Charlottenburg. Instead of a flat list it lays tasks along a visual timeline for the day and imports calendar events onto it, with weekly and monthly views and AI planning.
That suits a person whose workday is mostly meetings. It suits a person with a long backlog less, since the app is built around one day at a time. The pages show no paid prices and no hosting location, and the privacy policy sits on a Notion page we did not read in full. The usage figures on the homepage are vendor claims we did not check.
What Structured does better than Microsoft To Do
- Tasks and calendar events share one timeline
- German GmbH with its register number published
- Web app plus phone, computer and watch views
Where Structured is a step down from Microsoft To Do
- Long project backlogs and team boards are not its focus
- No paid prices or hosting location visible
- Privacy policy not fully read
Standout against Microsoft To Do. Structured is the only tool here whose main screen is a timeline, not a list.
Best for: Small teams that want comments on tasks and a free plan with no time limit
NOZBE sp. z o.o. operates from ul. Spacerowa 31/5 in Gdynia, with KRS number 0000987269 and EU tax ID PL5862383639. The terms are governed by Polish law and Polish courts. That puts Nozbe in the EU, and its homepage argues that email is the wrong place for team work and that comments on a task are the right one.
The free plan has no time limit but gives 500MB, 3 project sections, 3 tags and 7 days of history for completed tasks. Premium costs $9 per user a month plus taxes. The terms say EU companies with a valid VAT number outside Poland are not charged VAT. Platforms and hosting location are not stated on the pages we read.
What Nozbe does better than Microsoft To Do
- Polish company with register and tax numbers published
- Comments on each task keep team talk out of email
- Free plan with no time limit
Where Nozbe is a step down from Microsoft To Do
- Free plan caps sections, tags and history
- Premium is priced per user in dollars
- Platforms and hosting not stated
Standout against Microsoft To Do. Nozbe is the only tool here that argues task comments should replace email threads for a team.
Best for: People with ADHD or strong views on how their task system should work
Amazing GmbH is described in its privacy policy as a Swiss company, and the terms say it operates the site and the apps. Switzerland is outside the EEA but has an EU adequacy decision. The city is not stated on the pages we read, and the privacy policy we read is dated January 19, 2020.
Marvin offers lists, a day planner, a calendar, habits and goals, with more than 100 features according to the vendor. Where Microsoft To Do hands you one structure, Marvin asks you to build yours. One plan holds everything at $8 a month or $96 billed yearly, after a 14-day trial without a credit card. No free plan follows the trial.
What Amazing Marvin does better than Microsoft To Do
- Custom workflows and views
- Habits and goals alongside tasks
- Single plan with every feature
- Web, Mac, Windows, iOS and Android apps
Where Amazing Marvin is a step down from Microsoft To Do
- No free plan after the 14-day trial
- Many features mean setup time
- City, hosting and a current privacy policy not visible
Standout against Microsoft To Do. Amazing Marvin is the only tool here designed around choosing your own task system.
Best for: Technical users and small teams who want to own the list and its server
Vikunja is published by Konrad Langenberg Software, a sole proprietorship in Lübeck, since 2018. The code is AGPLv3. Against a Redmond corporation that is the opposite end of the scale: no large vendor, but code you can read and run on a Raspberry Pi or a VPS, with no seat limit when self-hosted.
A hosted version in the EU costs €4 a month for a person and €5 per user for an organisation. The feature set is deliberately small: lists, kanban, gantt, a calendar, labels, filters and a documented API. There is no portfolio view, reporting or goals. Whoever self-hosts also owns the upgrades and the backups, and a one-person business is a continuity question to ask.
What Vikunja does better than Microsoft To Do
- AGPLv3 code you can inspect and run anywhere
- Free self-hosted with no seat limit
- Hosted EU option priced in euros
- Documented API for your own integrations
Where Vikunja is a step down from Microsoft To Do
- Self-hosting means you handle upgrades and backups
- Sole proprietorship with no enterprise support contract
- No reporting, portfolio view or goals
Standout against Microsoft To Do. Vikunja is the only tool here that runs for free at any team size with no provider involved.
Best for: People whose day is shaped by meetings across multiple calendar accounts
Morgen AG is at Gotthelfstrasse 28 in Rapperswil SG, with UID CHE-216.439.443 in its terms. The pricing page calls the product Swiss-hosted. The privacy policy explains that Google LLC hosts the data in Switzerland through Google Cloud Platform, so the data location is Swiss while the infrastructure provider is American.
Morgen offers an AI planner for time blocking, unlimited calendars and task integrations, calendar automations and booking pages. Individual plans cost $30 a month or $15 a month billed yearly. A 14-day trial needs no card, and a 30-day money-back guarantee is stated. No free plan is shown after the trial, which makes it dear for a simple list.
What Morgen does better than Microsoft To Do
- Merges several calendars with tasks in one view
- AI time blocking and booking pages
- Data located in Switzerland, with a UID published
- Windows, macOS, Linux, mobile and browser apps
Where Morgen is a step down from Microsoft To Do
- $30 a month on the monthly plan
- Hosting runs on Google Cloud Platform
- No free plan after the trial
Standout against Microsoft To Do. Morgen is the only tool here built to schedule tasks across several calendars at once.
Best for: Teams that want personal tasks and project data in one German-hosted suite
Zenkit is developed by Axonic Informationssysteme GmbH in Karlsruhe, and its pages state that data is stored in German data centres. Its suite includes Zenkit To Do, a simpler app with due dates, reminders, recurring tasks and smart lists, so it overlaps directly with what Microsoft To Do is known for, alongside Base, Hypernotes, Projects and Zenchat.
The same data in Zenkit Base can appear as kanban, list, table, calendar or mind map. That flexibility costs setup time. A free tier exists for personal use, and the Plus plan is €9 per user a month. SSO and admin controls are reserved for the Business plan, and there is no self-hosting.
What Zenkit does better than Microsoft To Do
- German hosting and a Karlsruhe company
- A dedicated To Do app with smart lists and recurring tasks
- One dataset shown as board, table, calendar or mind map
- Prices in euros
Where Zenkit is a step down from Microsoft To Do
- Setup effort for a simple personal list
- Plus plan at €9 per user a month, above MeisterTask Pro at €6.50
- No self-hosting, and SSO only on Business
Standout against Microsoft To Do. Zenkit is the only tool here that bundles a task app, a wiki and team chat from one German company.
Best for: Teams that want visual boards, automations and time tracking from a certified vendor
MeisterTask is made by MeisterLabs GmbH near Munich, which has been around since 2006, and its pages put the servers in Frankfurt. They also state ISO 27001 certification. For a company that must show a supplier audit trail, that certificate is a concrete thing to put in a file, which a plain consumer list app usually cannot offer.
The core is a kanban board with automations, time tracking and an agenda view. The free tier covers unlimited projects but only three project members; Pro at €6.50 a month adds integrations, automations and timeline views. It is a project tool first, so a person who just wants a checklist will find it bigger than needed. No self-hosting is offered.
What MeisterTask does better than Microsoft To Do
- ISO 27001 certification and Frankfurt hosting
- Automations and built-in time tracking
- MindMeister link turns mind maps into boards
- Priced in euros from €6.50
Where MeisterTask is a step down from Microsoft To Do
- Free tier stops at three project members
- Timeline views need a paid plan
- Heavier than a plain checklist app
Standout against Microsoft To Do. MeisterTask is the only tool here that lists an ISO 27001 certificate.
Best for: Organisations that already run or want to run their own collaboration server
Nextcloud GmbH in Stuttgart, founded in 2016 by Frank Karlitschek, publishes AGPL software that you host yourself or buy from a managed provider. It is not a to-do app: the platform covers files, calendar, contacts, Talk and Office, with an app store where kanban and note apps can be added. Microsoft To Do would be one small piece of what Nextcloud replaces.
The advantage over any hosted list is that no provider needs to hold the data. The cost is that you, or someone you pay, own hosting, updates, backups and support, and setting it up is a project rather than a signup. Its own page says the mobile and desktop clients are less polished than commercial rivals, which matters for a daily task habit.
What Nextcloud does better than Microsoft To Do
- No provider holds the data when you host it yourself
- Calendar, contacts, files and chat on the same server
- AGPL licence and a large app store
Where Nextcloud is a step down from Microsoft To Do
- Setup and upkeep fall on you
- Kanban apps are add-ons, not the core product
- Clients less polished than commercial rivals
Standout against Microsoft To Do. Nextcloud is the only tool here where the list lives on a server that no vendor operates.
Best for: Teams already inside Google Workspace or Microsoft 365 who prefer boards to lists
Kanbanchi Ltd is registered in England and Wales under company number 10478311, with its office at CKR House, 70 East Hill, Dartford, Kent, and its terms apply the courts of England and Wales. The United Kingdom has an EU adequacy decision, but it is outside the EEA, so this is the only tool on the page under non-EU, non-Swiss law.
Kanbanchi works as kanban boards inside a Google or Microsoft account, with a Gantt chart and a time tracker that integrates with Google Calendar. Essential costs $5.99 a month, or $3.97 a month billed annually, with unlimited boards, cards and collaborators. No free plan or hosting location appears on the pages we read, and it does not describe a standalone checklist app.
What Kanbanchi does better than Microsoft To Do
- Gantt chart and a time tracker on top of boards
- Unlimited boards, cards and collaborators on Essential
- Works with both Google Workspace and Microsoft 365
Where Kanbanchi is a step down from Microsoft To Do
- A board tool, so heavier than a checklist
- No free plan or hosting location shown
- Priced in dollars and registered in the UK
Standout against Microsoft To Do. Kanbanchi is the only tool here that runs as an add-on inside your existing Google or Microsoft account.
What actually breaks when you switch
The first break is data. Check what Microsoft To Do lets you export before you commit, because we could not read its documentation, and plan to copy open tasks across by hand where no import exists. Recurring tasks, reminders and attachments are the items most likely to lose their detail. Run both apps side by side for two weeks, and keep the old lists read-only until you have stopped looking at them.
The second is shared lists. Everyone you share with has to create an account somewhere new, and the free limits bite quickly: 5 people on a Superlist list, three members on a MeisterTask project, 3 sections in the free Nozbe plan. The third is habit. Tools built around a timeline (Structured), calendars (Morgen) or your own workflow (Amazing Marvin) take longer to learn than a list, so budget a week before judging them.
Can I take my lists with me when I leave Microsoft To Do?
We cannot answer that from Microsoft's side, because the To Do pages were not readable for us. Look inside the app and your Microsoft account for an export or a way to download your data before you cancel or delete anything, and keep the original lists until the new tool has run alongside the old one for a couple of weeks.
On the European side we did not verify import features for every tool either, so treat any promise of one-click migration with caution. The safe path is to copy the active projects across by hand, which for most personal lists takes less than an hour, and to leave completed tasks behind. Nozbe and Zenkit are the ones to test first if you have long, structured projects.
Which of these apps run on Windows and Android?
Super Productivity lists Windows, macOS, Linux, Android, iOS and the web. Amazing Marvin lists web, Mac, Windows, iOS and Android. Morgen offers Windows, macOS, Linux, mobile and browser apps. Superlist covers macOS, iOS, Android and the web, so it reaches Android but has no Windows desktop app in its list, though the web version works there.
Things is the outlier: its apps exist for Mac, iPhone, iPad, Watch and Vision Pro, and a Windows or Android device cannot open the list at all. Structured names phone, computer, watch and web. Nozbe and Kanbanchi do not state their platforms on the pages we read; Kanbanchi works as a board inside a Google or Microsoft account.
Which one to pick
For a personal list on Apple hardware, start with Things; on mixed devices, Superlist or Super Productivity. For a day that is mostly meetings, Structured or Morgen fit better than a checklist. For a small team, Nozbe, MeisterTask or Zenkit give you shared work with a European seat, and Kanbanchi does if everyone already lives in a Google or Microsoft account.
If keeping the data out of any vendor's hands matters most, choose Vikunja for a focused task list or Nextcloud for a full server, and accept the maintenance. If you want to stay put because To Do does what you need, that is also reasonable: this page shows what the alternatives offer, but we could not verify what you would give up from the Microsoft side.
Frequently Asked Questions
It depends on the job. Superlist from Berlin is the closest match for a personal list with notes and shared lists, with a free plan. Things from Stuttgart suits an all-Apple household. Super Productivity from Berlin is free and local-first. Structured from Berlin plans the day on a timeline, and Nozbe from Gdynia suits small teams. Vikunja from Lübeck is the choice if you want to host the list yourself.
According to the Microsoft Services Agreement, for services other than Skype you contract with Microsoft Corporation at One Microsoft Way, Redmond, WA 98052, U.S.A. We could not read the To Do product pages, so we do not describe the app itself. The agreement is the only Microsoft document this page relies on.
Several have a free route. Super Productivity is free with no premium tiers, Superlist has a free plan limited to 5 lists, Nozbe has a free plan with no time limit, and Zenkit and MeisterTask both list a free tier. Vikunja and Nextcloud are free when you host them yourself. Things, Amazing Marvin, Morgen and Kanbanchi do not show a permanent free plan on the pages we read.
Yes, two tools here are built for it. Vikunja is AGPLv3 and free to self-host with no seat limit, and Nextcloud is an AGPL platform you run yourself or through a managed provider. Super Productivity is not a server product, but it stores data locally and lets you sync through WebDAV or Dropbox as an alternative to its own German servers.
Things is made in Stuttgart, so it is European, but it only exists for Apple devices. If any computer you use runs Windows, pick a tool with a web app or a Windows client instead, such as Super Productivity, Amazing Marvin, Morgen or Superlist's web version.
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