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An Internal Developer Platform (IDP) centralises service discovery, provisioning and observability in a single portal, so developers stop depending on stale wikis and Slack channels. Backstage, Port and Cortex dominate the market: Backstage is open source with a dedicated team, Port is fast low-code SaaS, and Cortex focuses on scorecards for measurable technical discipline based on team size.
Backstage is the open-source platform from Spotify for building Internal Developer Platforms: a web portal (Node.js + React) that centralises service catalogs, scaffolding, and technical documentation. Adopted by Netflix, American Airlines, and hundreds of companies since 2020, it needs 1-3 dedicated engineers and pays off for organisations with more than 50 developers.
Platform engineering formalizes the internal product development teams need. An Internal Developer Platform (IDP) centralises deployment, observability and self-service behind a unified interface so product teams deliver value without becoming infrastructure experts. Investment pays off from around 30 to 50 developers.
