KrakenD
High-Performance Open Source API Gateway
Gravitee.io
Event-Native API & AI Agent Management Platform
Optic
OpenAPI Linting, Testing & Version Control Platform
Bruno
Open-Source & Git-Friendly API Client
Hoppscotch
Open-Source API Development Ecosystem
Zuplo
The Programmable API Gateway
Bump.sh
Automated API Documentation & Change Tracking Platform
Stainless
Automated SDK Generation & API Interface Platform
Scalar
Modern Open-Source API Platform & Client
Inkeep
AI Agent Builder & Customer Support Copilot