Best Freemium Open Source

Ranked by community votes · Freemium only

Eclipse

Open-source software framework for building and integrating applications

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Open-source natural language processing library based on the BERT model

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Traces, evals, and metrics to debug and improve your AI agents

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API first electronic health record (EHR) that is open source

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nao is the analytics agent builder for context engineering

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Open source agentic BI for founders

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BuildBuddy provides enterprise features for Bazel — the open source build system that allows you to build and test software 10x faster

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Your codebase as a knowledge graph your AI assistant queries instead of grepping: no embeddings, just a graph it can trace

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Port Zero eliminates port conflicts in local development by routing random OS-assigned ports through stable virtual domains

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Open-source product analytics with unified profiles — autocapture, trends, funnels, retention, and user flows