Should I buy an engine, a plug-in or a full commerce platform for site search?
The vendors on this list sell three different things under one label. Doofinder, Site Search 360 and AddSearch are closest to a plug-in: you point them at a catalogue or a website, they index it and a search box appears. Tweakwise, Prefixbox, Luigi's Box and FactFinder are search platforms with merchandising controls, where a shop team tunes ranking and category pages. Nosto and Relewise start from personalization and treat search as one module of it.
The choice follows who will touch the tool every week. A merchant with no developer and a catalogue on a standard shop platform is the audience Doofinder describes. A merchandiser who wants to pin products and write ranking rules is the audience Tweakwise describes, with rule-based control next to its AI vector search. A retailer with technical parts and long-tail codes should read what FactFinder says about exact matching before anything else.
If you pick a platform when a plug-in would do, you pay for modules and consultants you will not use. If you pick a plug-in when merchandisers need rules, they will ask for the platform within a year.
How do European site search vendors charge, and what makes the bill grow?
Four pricing mechanics appear on this list. Doofinder sells monthly plans with a request cap per product, so the bill grows in steps when a shop moves from Basic to Pro.
Prefixbox meters API requests and counts autocomplete keystrokes, filter changes and page changes as requests, so heavy search traffic climbs a tier faster than orders do. Luigi's Box adds pageviews, category pageviews, catalogue items, searches, autocompletes and recommendations into units. Relewise charges by personalization requests with unit prices that fall as volume rises.
Site Search 360 scales on two limits at once, indexed entries and monthly searches, so a growing catalogue and growing traffic both push the plan up.
AddSearch separates keyword search (from USD 119 a month on annual billing) from AI Answers (from USD 700 a month), so switching on the AI layer is a different budget line. Tweakwise lists starting figures per module, but its pricing page names no currency or period, so treat those as a prompt for a quote and not as a price.
FactFinder, Empathy.co and Nosto publish no prices at all. Whatever vendor you shortlist, convert one month of your own search logs into its unit before you compare totals, because a euro figure in one table and a unit in another cannot be set side by side.
Does choosing a European search vendor mean my query logs stay in Europe?
A European contracting company means a European contract, a European supervisory authority and GDPR applying to the vendor directly. It does not by itself say where the index sits. Doofinder, Luigi's Box, Prefixbox, Tweakwise, AddSearch and Site Search 360 do not state a hosting location on the pages reviewed, so the answer has to come from the vendor in writing.
The vendors that do say something give different answers. FactFinder's FAQ says it is hosted in the EU and that its vector search and Atlas AI are its own technology.
Relewise's privacy notice names Microsoft Azure North Europe and West Europe, which is a European region on a US-parented cloud. Empathy.co's documentation describes core AI services on dedicated hardware at its own headquarters in Gijon, with a self-hosted option. Nosto's published sub-processor list names Amazon Web Services, Inc. for hosting in the United States and Amazon Web Services Australia Pty Ltd, with no EU location named for primary storage.
Ownership is a second check. Tweakwise says it is part of Orisha Commerce, Site Search 360 is sold by ZOOVU (Germany) GmbH, and AddSearch's about page says it joined the saas.group family in 2023. None of those facts disqualifies a vendor, but each belongs in the due-diligence questionnaire.
How do I move from Algolia to a European search vendor?
Start from what your Algolia setup actually consists of. Algolia's pricing page lists Search, Recommendations, Personalization, Analytics and Browse as separate products, so a mature account may use several of them.
Each European vendor here maps onto part of that: Doofinder, Luigi's Box and Prefixbox cover search with recommendations, Tweakwise adds category pages, and Relewise and Nosto lean on personalization. The tools list Algolia among the products they replace, but the pages reviewed describe no importer for an Algolia index, so expect to rebuild from your own catalogue source.
The work that takes time is rarely the data. Rules, synonyms and ranking tweaks made in Algolia's dashboard have to be re-entered, front-end code that calls the Algolia API has to be rewritten or swapped for a plug-in, and your analytics history will not move across. Run both systems in parallel for a trial period and compare zero-result queries before you cut over.
Contract terms differ in a way that is easy to miss. Algolia's terms assign a customer domiciled in Europe to Algolia SAS in Paris under French law, so a European company already has a French counterparty today. The reason to leave is therefore more likely price metering, feature fit or the parent company than the contract's location.
When is it better not to switch away from your current site search?
Stay where you are when the search works and the invoice is predictable. A migration costs developer weeks and a period of lower relevance while synonyms and rules are rebuilt. If your pain is a single price jump, ask your current vendor for a quote on the next tier first.
Do not buy a retail-specialised platform for a documentation site. Prefixbox, Luigi's Box and Empathy.co are described as retail and e-commerce products, and Tweakwise as a web-shop product. AddSearch and Site Search 360 are the two on this list that do both. Likewise, a team that wants an engine its own developers control should not expect that from a managed platform with a demo-led sales process.
Also pause if data location is the only reason. Six of the ten tools here do not state a hosting location on the pages reviewed, so a switch to them may change the contracting company without changing where the index is stored.
Which of these tools connect to my shop platform, and which also search content sites?
Doofinder lists dedicated pages for Magento, Shopify, BigCommerce and WooCommerce, with a script or API for anything else. Prefixbox has a self-service Shopify app next to its managed service and a headless API for custom storefronts. Site Search 360 says setup takes about five minutes through a script, an API or a plug-in, and it ingests a product feed in its e-commerce mode. Empathy.co's release notes mention a VTEX integration announced in June 2026.
For documentation, blogs and marketing sites, the choice narrows. AddSearch started as a replacement for Google Site Search and still centres on hosted website search with facets, synonyms and ranking controls. Site Search 360 has a content mode with cross-domain search and 19 languages. Tweakwise is the exception among the commerce tools in that its suggestions can include blogs, FAQs and pages, though it is built for web shops.
Developer-led teams should ask each platform vendor for API documentation before a demo. Relewise advertises developer SDKs, FactFinder works through its Discovery Practice consultants, Prefixbox has search specialists who tune results, and Luigi's Box sells guided integration at the Growth plan and custom integration at Enterprise.
