8 European Feature Flagging & Experimentation vendors.
Feature Flagging & Experimentation: Runtime feature toggles, gradual rollouts and A/B testing infrastructure for software teams. Below, every vendor in the knowledge base headquartered in the EU or the EEA, each checked by us for headquarters, owner, hosting and licence. Non-European vendors are listed at the bottom with a link to their European alternatives.
24 vendors in total: 8 European, 12 American, 4 other; 8 open source. Last checked: 5 October 2026.
Why this matters for digital sovereignty
Feature-flagging and experimentation platforms sit in your application's runtime path and can influence behaviour and user data in real time, while user attributes are often sent to the vendor's infrastructure to evaluate targeting rules. Check what user data is sent to evaluate flags, where that processing happens, and whether a self-hosted variant exists.
European vendors
- AB TastyEU sovereign
French A/B testing and experimentation platform with CNIL certification and EU-only data processing.
France
- Bucket (Reflag)EU sovereign
Danish B2B-focused feature-flagging and experimentation platform, rebranding to Reflag.
Denmark
- Confidence (Spotify)EU sovereign
Swedish warehouse-native experimentation platform from Spotify, offered externally as a distinct product.
Sweden
- ConfigCatEU sovereign
Feature flag and configuration management platform with open-source SDKs and GDPR-compliant EU hosting by default.
Hungary · open-source
- FeatBitSelf-hosted / open source
French open-source (MIT) AI-native feature-flag and A/B-testing platform, founded 2021.
France · open-source
- KameleoonEU sovereign
Paris-based web and feature experimentation platform with CNIL certification and EU-only hosting.
France
- TGGLEU sovereign
French feature-flag, A/B-testing and release-management platform with EU data storage (GDPR), founded 2022.
France
- UnleashSelf-hosted / open source
Norwegian open-source feature-management platform with gradual rollouts, A/B testing and kill switches; commonly self-hosted so evaluation stays local and no data leaves the customer's own infrastructure.
Norway · open-source
Non-European vendors in this category
For each vendor, the page with European alternatives and the sovereignty profile.
- Non-EU vendorAmplitude ExperimentUnited States · 8 EU alternatives
- Self-hosted / open sourceConfiguIsrael · 8 EU alternatives
- Non-EU vendorConvert.comUnited States · 8 EU alternatives
- Non-EU vendorDevCycleCanada · 8 EU alternatives
- Non-EU vendorEppoUnited States · 8 EU alternatives
- Non-EU vendorFlagsmithUnited Kingdom · 8 EU alternatives
- Self-hosted / open sourceFliptUnited States · 8 EU alternatives
- Non-EU vendorGrowthBookUnited States · 8 EU alternatives
- Non-EU vendorHarness Feature FlagsUnited States · 8 EU alternatives
- Non-EU vendorLaunchDarklyUnited States · 8 EU alternatives
- Non-EU vendorOptimizely Feature ExperimentationUnited States · 8 EU alternatives
- Non-EU vendorSchematicUnited States · 8 EU alternatives
- Non-EU vendorSplitUnited States · 8 EU alternatives
- Non-EU vendorStatsigUnited States · 8 EU alternatives
- Self-hosted / open sourceSwitchboxUnited States · 8 EU alternatives
- Non-EU vendorVWO (Visual Website Optimizer)India · 8 EU alternatives
Frequently asked questions
Which European Feature Flagging & Experimentation vendors are there?
The knowledge base lists 8 European Feature Flagging & Experimentation vendors, including AB Tasty, Bucket (Reflag), Confidence (Spotify) and ConfigCat. Every record is checked for headquarters, ultimate owner, hosting locations and licence.
Are there open-source options for Feature Flagging & Experimentation?
Yes. Open-source Feature Flagging & Experimentation software from Europe includes ConfigCat, FeatBit and Unleash; you can self-host it with the encryption keys under your own control.