16 open-source API Management vendors.

Open-source software for API Management that you can self-host, with auditable source code — regardless of the developer's headquarters.

• Apache APISIXNon-EU vendor

  Open-source API gateway and management platform under the Apache Foundation

  United States

• ApimanNon-EU vendor

  Open-source API management platform with policy-driven governance and security

  United States

• BrunoSelf-hosted / open source

  Open-source, local-first API client (MIT) with no cloud component; stores collections as plain text files in your own Git repository.

  India

• Emissary-ingressSelf-hosted / open source

  CNCF Incubation project (community-governed, no single controlling company): Kubernetes-native API gateway on Envoy Proxy, originally by Ambassador Labs.

  United States

• FusioSelf-hosted / open source

  Open-source API management platform for building and managing REST APIs

  Germany

• Gloo EdgeNon-EU vendor

  Envoy-based API gateway by Solo.io (Cambridge, US) for microservice routing, traffic management and API lifecycle.

  United States

• Gravitee.ioNon-EU vendor

  Gravitee is a US-headquartered (Denver, CO) open-source API and event management platform, originally founded in Lille, France in 2015. It offers an API gateway, developer portal, and agentic API management capabilities. Raised $125M+ total, with a $60M Series C in May 2025 led by Sixth Street Growth.

  United States

• HoppscotchNon-EU vendor

  Open-source, self-hostable API development environment; commercial SaaS arm based in Thrissur, Kerala (India).

  India

• InsomniaNon-EU vendor

  API testing client for REST/GraphQL/gRPC; open-source core, owned by Kong Inc. (San Francisco) since 2019.

  United States

• Kong GatewayNon-EU vendor

  Open-source API gateway with high performance, available as cloud or self-hosted

  United States

• KrakenDSelf-hosted / open source

  Spanish high-performance API gateway built in Go with declarative configuration

  Spain

• MicrocksSelf-hosted / open source

  CNCF Incubating open-source platform (no single controlling company) for mocking and contract-testing APIs based on OpenAPI/AsyncAPI specifications.

  United States

• Ory OathkeeperEU sovereign

  Open-source Identity & Access Proxy (Germany) for API authentication, authorization and policy-driven request mutation; self-hosted or via Ory Network with EU data residency.

  Germany

• STOASelf-hosted / open source

  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).

  France

• TykNon-EU vendor

  British open-source API gateway and management platform with high scalability

  United Kingdom

• WSO2 API ManagerNon-EU vendor

  Open-source API management platform with gateway, developer portal and analytics

  United States · owner in Sweden