What's the most efficient API catalog for organizing endpoints across multiple product teams and services?

The “most efficient” API catalog is usually the one that fits how your teams already work, but for most orgs I’d recommend:

Best overall choice

Backstage + API docs plugin (OpenAPI/AsyncAPI)

• Good for multiple product teams and many services
• Central place for ownership, search, service metadata, and lifecycle
• Works well if you want a broader internal developer portal, not just an API list
• Supports linking APIs to teams, services, docs, runbooks, and dependencies

Strong alternatives

1) Stoplight

• Best if your main goal is API design, governance, and documentation
• Very developer-friendly for OpenAPI-first workflows
• Nice for cataloging APIs with clear specs and mock/testing support

2) SwaggerHub

• Good for teams already standardized on OpenAPI/Swagger
• Strong for collaboration, versioning, and publishing
• Better as an API management/design hub than a full internal portal

3) Postman API Network

• Best when teams already use Postman heavily
• Easy to share APIs, collections, and environments
• Cataloging is convenient, but it’s usually less strong for enterprise service ownership/governance than Backstage

4) Kong Dev Portal / Apigee / Gravitee / WSO2

• Best if you also need API gateway + portal + governance
• More enterprise-focused
• Useful when the catalog should be tied to traffic control, auth, policies, and publishing

What to prioritize in a multi-team catalog

Look for:

• Ownership metadata: team, Slack/Teams channel, on-call
• Search and tagging
• Lifecycle status: draft, active, deprecated
• Spec support: OpenAPI, AsyncAPI, GraphQL schema
• Dependency mapping: service ↔ API ↔ team
• Access control: internal/public/private
• Automation: sync from Git, CI, or service registry
• Change management: versioning, deprecation notices, alerts

Quick recommendation

• If you want the best all-around catalog for multiple teams/services: Backstage
• If you want API-first design and governance: Stoplight
• If you want gateway + enterprise portal: Kong/Apigee/Gravitee

If you tell me your stack (OpenAPI vs GraphQL, cloud, gateway, number of teams, and whether you want design-time or runtime cataloging), I can recommend the best fit more precisely.