Postman is the leading API development platform offering tools for API design, testing, documentation, and collaboration across teams of all sizes.

Postman offers a comprehensive API development platform with Free plan for single users, Solo plan at $9/month for individuals, Team plan at $19/user/month for collaboration, and Enterprise plan at $49/user/month with advanced governance. The platform includes API governance tools, private API networks, mock servers, collection runs, and AI credits.
Developer-friendly API documentation platform
Starting Price
ReadMe helps teams build and manage interactive API documentation that is completely customizable and collaborative. It serves as a dynamic platform for API and product documentation with enterprise-grade features.
JavaScript runtime built on Chrome's V8 JavaScript engine
Node.js is an open-source, cross-platform JavaScript runtime environment that executes JavaScript code outside a web browser.
Documentation and knowledge management platform
Starting Price
GitBook is a dual-billing documentation platform that combines per-site and per-user pricing to provide flexible documentation solutions for teams of all sizes.