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A curated, opinionated breakdown of the open source tools worth building a platform engineering stack on in 2026. Covers the full IDP layer with Backstage and OpenChoreo, GitOps with ArgoCD and Flux, infrastructure provisioning via Crossplane, observability with OpenTelemetry and the Grafana stack, secrets management with External Secrets Operator and OpenBao, CI/CD with Dagger and Tekton, service mesh options, and developer environment tooling. Includes a starter stack table and a decision tree for choosing between Backstage, OpenChoreo, and Port based on team size and needs.

The Open Source Platform Engineering Stack You Actually Need in 2026

🚀 Daily Open Source Tools Squad delivers daily articles, open-source projects, and technical resources for Developers & DevOps pros. Stay updated with the latest trends & insights!

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