Bump.sh vs Stoplight

Bump.sh is a hosted API documentation platform built by a small, fully remote French team led by CEO Sébastien Charrier. It takes OpenAPI and AsyncAPI definitions from your repository, turns them into fast reference docs, and diffs every new version so breaking changes are flagged and a changelog is generated automatically. It is docs-as-code for teams that treat the API contract as the source of truth.

Every commit or pull request can deploy or preview docs through the CLI or GitHub Action, and API hubs group many APIs into one portal with a custom domain. Pro adds branch management, an API Explorer, release rollback and the automatic changelog. There is no free plan: Basic costs $50 per month for 10 API docs, Pro $120 per month for 30 docs with a 14-day trial, and Custom adds SSO, embed mode and a 99.99% SLA. Open source projects can request free Pro access.

Bump.sh suits platform teams publishing many internal or public APIs, especially event-driven ones, since AsyncAPI support is first class. It is weaker for long guides and marketing-style portals. ReadMe and Mintlify are stronger for narrative docs, Redocly offers similar OpenAPI tooling with more linting and self-hosting, and Stoplight focuses on design-first editing.

The biggest recent change is its new managed MCP platform: Bump.sh generates and hosts MCP servers from API definitions and Arazzo workflow files, with auth and observability, so AI agents can call your API safely. Note that Basic includes only five MCP tools.

Stoplight is an API design, documentation and governance platform, founded in Austin, Texas, and acquired by SmartBear in 2023. It serves API-first organizations that design APIs before writing code, so teams agree on contracts early and keep documentation, mocks and implementations in sync.

Stoplight Studio provides a visual OpenAPI editor that lets people design endpoints, models and examples without hand-writing YAML, with Git sync to keep specs in repositories. Prism, its open-source mock server, generates mock APIs from specs so frontend and backend teams can work in parallel. Spectral, Stoplight's widely used open-source linter, enforces API style guides automatically, and Stoplight's governance features apply shared rules across teams and projects. Hosted documentation with interactive try-it consoles and reusable shared components round out the platform. A free plan covers individuals, while team plans add more users, projects, private docs and governance features.

Stoplight fits organizations with several API teams that need consistent design and governance. Paid tiers are expensive for small teams, and since the SmartBear acquisition some customers have been uncertain about how it will evolve alongside SwaggerHub. Postman is the broader API platform for testing and collaboration, SwaggerHub is SmartBear's other design tool, and Redocly, Bump.sh and Mintlify are popular for documentation. Spectral and Prism remain useful on their own even if you do not use the hosted platform.