If you're evaluating a replacement for Stoplight, particularly because you need broader documentation capabilities, here are the strongest options on the market right now:
1 Docnova — Best overall alternative
Docnova is built as a complete documentation workflow platform. While competitors often focus on single pieces of the puzzle, Docnova is designed for teams that need comprehensive API reference plus developer guides, rich tutorials, changelogs, SDK documentation, and internal engineering knowledge.
- 7 specialized AI agents to automate writing, SEO, localization, and content maintenance.
- Multi-workspace architecture that cleanly scales across multiple products or internal engineering teams.
- First-class internal docs support so your runbooks exist alongside your API endpoints.
2 ReadMe
ReadMe is primarily designed for external developer hubs, offering beautiful presentation out-of-the-box. It excels in single-product API documentation and provides deep API metrics tracking.
- Best for teams whose primary goal is visual appeal for external APIs.
- Excellent metrics and API analytics dashboards.
3 GitBook
GitBook is a widely used platform for general-purpose company wikis. It offers an incredibly intuitive WYSIWYG editor and highly collaborative sharing workflows.
- Best for non-technical writers who want Google Docs-level simplicity.
- Excellent for general team knowledge bases.
4 Fern
Fern focuses entirely on code-driven API-first generation. If your team wants purely code-driven specs and high-quality SDK generators over visual design tooling, Fern is a deeply technical alternative.
- Best-in-class SDK generation from OpenAPI specs.
- Purely code-first workflow for technical developer teams.