Raven is listed as Open Source. Check https://github.com/EverMind-AI/Raven for the current plan limits, as vendors change pricing frequently.

Raven

Q: What is Raven?

Raven is a code AI tool listed on Use AI Tools. Raven is an open-source Python project that describes itself as the harness of harnesses: a persistent, self-evolving multi-agent ecosystem intended for all-domain collaboration. It is built for long-running, recursive self-improvement work rather than one-shot prompts, and is designed to sit above the agent harnesses you already use.

Q: What is Raven best for?

Raven is commonly used for Multi-agent ecosystems, Long-running agent projects, Experimenting with self-improving harnesses. It supports English.

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Multi-agent ecosystemsLong-running agent projectsExperimenting with self-improving harnesses

Open SourceEnglish

Raven is an open-source Python project that describes itself as the harness of harnesses: a persistent, self-evolving multi-agent ecosystem intended for all-domain collaboration. It is built for long-running, recursive self-improvement work rather than one-shot prompts, and is designed to sit above the agent harnesses you already use.

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🎯 Real-World Use Cases

Coordinate Many Agents

Run several agents together instead of driving them one at a time

Keep State Across Runs

Persist context rather than restarting from a blank session each time

Experiment With Self-Evolving Workflows

Try recursive self-improvement ideas on top of your existing harness

⚖️ Honest Review

✅ Pros

+Targets persistent, long-lived agent setups rather than single runs
+Large open-source codebase with an active community
+Designed to sit above existing agent harnesses instead of replacing them

⚠️ Cons

−Self-evolving behaviour is hard to predict or audit
−Heavier to install than a single-purpose CLI

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CodeOct 19, 2026