Category: API Management
4 European alternatives to STOA — GDPR-compliant & EU-hosted.
French open-source (Apache 2.0) API gateway by CAB Ingénierie connecting legacy/SOAP APIs and AI agents via MCP, deployable on-premise for full EU sovereignty (DORA/NIS2/GDPR).
Facts
- Headquarters
- FR (EU)
- Category
- API Management
- Type
- Product
- GDPR-compliant
- Yes
- Open-source
- Yes
- Data hosting
- EU, self-host
Top EU-based & GDPR-compliant alternatives to STOA
- Frends↗
Finnish iPaaS and API management platform tracing its origins to 1988, spun out as an independent European company. Over 250 employees across Finland, Sweden, Germany and Poland, serving 6,000+ customers in 16+ countries as of 2026. Markets itself on GDPR-native, EU-based operations free of US CLOUD Act exposure.
FI · commercial
- Locoia↗
German low-code iPaaS and API integration platform headquartered in Hamburg (corrected from proposed Frankfurt, which is only the server-hosting location), with 1000+ connectors. Acquired by Aareon AG (also a German company) in February 2023; infrastructure hosted in Frankfurt, ISO 27001 certified, GDPR-compliant.
DE · commercial
Frequently asked questions
What is the best European alternative to STOA?
It depends on your use case. Strong EU alternatives to STOA include Axway, Frends and Fusio. On this page you can compare 4 EU alternatives by jurisdiction, data residency and open-source status.
Are there open-source alternatives to STOA?
Yes. Open-source EU alternatives to STOA include Fusio. These keep your data fully under your own control and let you self-host if you want to.
Is STOA GDPR-compliant and where is the data hosted?
STOA is headquartered in FR (EU) and hosts data in EU, self-host. It is also open-source, so you can self-host it. That makes STOA an EU-sovereign choice in its own right; the EU alternatives on this page are comparable European tools.