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Three self-hosted observability backends that all claim to be open source. We read the licence files, opened the enterprise directories and measured every container image on September 8, 2026, and the licence, the visibility and the footprint each land in the opposite place to the reputation.
Metabase, Apache Superset and Lightdash all call themselves open-source BI, but they disagree about where a metric definition is allowed to live. We read the licence files, the dockerfiles and the driver lists directly to find out what that costs you.
Three self-hosted identity providers that all call themselves open source. The licence boundary sits in a different place in each one, and where it sits decides which you can actually use. Measured from the licence files, the container registries and the shipped config defaults.
