18.4
Scalar is a collection of API products for documentation, client generation, API management, requests, and MCP server use.
Free planOpen sourceWebAPILinux
Best API 1 in 2026
28.2
Amazon API Gateway is a managed service for creating, publishing, maintaining, monitoring, and securing APIs that connect applications with backend services.
Free planAndroidiOSWeb
38.1
Bruno is a Git-native API client for exploring and testing REST, GraphQL, gRPC, and WebSocket APIs.
Free planOpen sourceAPIExtensionLinux
- 4
Apidog
Apidog is an API platform for designing, debugging, mocking, testing, and documenting APIs, with GraphQL and SOAP support.
Free planWebAPIExtensionLinux8.0From $9 a month - 5
Fern
Fern Docs builds interactive documentation websites from Markdown and API specifications, while Fern also generates strongly typed client libraries.
Free planOpen sourceWebAPILinuxmacOS7.8Free plan - 6
Postman
Postman is a platform for designing, testing, distributing, documenting, and monitoring APIs.
Free planWebExtensionLinuxmacOS7.6From $9 a month - 7
Insomnia
Insomnia is an API collaboration platform for designing, testing, debugging, mocking, and governing APIs.
Free planLinuxmacOSSelf-hostedWindows7.2From $12 a month - 8
SwaggerHub
SwaggerHub is a toolkit for API design, testing, documentation, and governance.
Free planWebSelf-hosted7.1From $740 a year - 9
Redocly
WebAPIExtension7.0From $10 a month - 10
Mockoon
Mockoon is a free, open-source tool for designing and running mock APIs locally.
WebAPILinuxmacOS6.8From €10 a month - 11
ReadMe
Free planWeb6.7From $250 a month - 12
Bump.sh
Bump.sh is a paid web, API, and self-hosted service for publishing API documentation and providing MCP servers that update with API releases.
WebAPISelf-hosted6.4From $50 a month - 13
KrakenD API Gateway
KrakenD API Gateway is a stateless, distributed gateway for connecting, protecting, combining and transforming APIs and AI workloads.
Free planLinuxmacOSSelf-hostedWindows6.4Free plan - 14
Stoplight Elements
Free planWebSelf-hosted6.4Free plan - 15
Fusio
Fusio is a free, open-source API management platform for connecting business logic and infrastructure to APIs.
Free planWebAPILinuxSelf-hosted6.3Free plan - 16
Kong Konnect
WebLinuxmacOSWindows6.2From $25 a month - 17
Tyk API Management
Tyk API Management is a platform for developing, operating, governing, and publishing APIs.
WebAPILinuxSelf-hosted6.1 - 18
Gravitee API Management
WebLinuxWindows5.9From $2,500 a month - 19
Speakeasy
Speakeasy is an AI control plane for connecting, securing, and observing agents and MCP servers from one entry point.
WebAPILinuxmacOS5.9 - 20
Apache APISIX
Apache APISIX is an open-source gateway for routing, securing, and managing traffic to APIs, microservices, and LLM workloads.
APILinuxSelf-hosted5.8 - 21
5.8From $365 a month - 225.8From $83 a month
- 23
WSO2 API Manager
WebLinuxmacOSWindows5.3 - 24
5.2 - 25
Spectral
LinuxmacOSWindows4.9