10 GitHub repos that replace your $99/mo internal developer portal in 2026:
1. grafana (74.3K stars)
Composable observability and dashboard platform that replaces the monitoring layer in tools like Datadog or Dynatrace.
github.com/grafana/grafana
2. nocodb (63.3K stars)
Self-hostable Airtable alternative you can use to build service catalogs and internal data layers without touching a SaaS subscription.
github.com/nocodb/nocodb
3. gitea (56.2K stars)
Self-hosted Git service with code review, CI/CD, and a package registry that cuts GitHub Enterprise or GitLab's paid portal tiers entirely.
github.com/go-gitea/gitea
4. sentry (44.1K stars)
Developer-first error tracking and performance monitoring you can self-host instead of paying for Sentry Business or Rollbar.
github.com/getsentry/sentry
5. appsmith (40.0K stars)
Low-code platform for building admin panels and internal tools that replaces Retool at a fraction of the per-seat cost.
github.com/appsmithorg/appsm…
6. backstage (33.5K stars)
Spotify's open-source developer portal framework that directly replaces Cortex, OpsLevel, or any paid Backstage-as-a-service tier.
github.com/backstage/backsta…
7. windmill (16.7K stars)
Open-source platform that turns scripts into webhooks, workflows, and UIs, replacing Retool or
Airplane.dev for internal tooling portals.
github.com/windmill-labs/win…
8. openproject (15.2K stars)
Open-source project management suite that replaces Jira or Azure DevOps as the team coordination layer inside a developer portal.
github.com/opf/openproject
9.
readthedocs.org (8.4K stars)
Self-hostable documentation platform that replaces Confluence or Notion for the technical docs layer of an internal portal.
github.com/readthedocs/readt…
10. devtron (5.5K stars)
Kubernetes-native developer platform with a software catalog and CI/CD pipeline that replaces paid portals like Humanitec or Cortex.
github.com/devtron-labs/devt…
The pattern here: every expensive line item in your internal developer portal stack, from dashboards to docs to deployments, has a self-hostable open-source replacement that's been production-ready for years.
Bookmark this. Most people are still paying $99/mo for what these do for free.