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Free & open source
ActiveGraph
Free alternative to: proprietary agent orchestration frameworks
License: Apache-2.0
Free terms: Free and permissively licensed; self-host on your own infra.
What it does
Yohei Nakajima's reactive object-graph runtime for Python that builds auditable, event-sourced AI agents — every state change is an event in a persistent log that can be replayed, forked, and diffed.
Heads-up: Licensed Apache-2.0 per the repo README (early public phase, ~v1.0 as of mid-2026). Complementary activegraph-packs repo (pack library, demo server, Inspector UI) also Apache-2.0.
Get it
The project lives with its maintainers — we don't distribute it and we can't provide support for it.
Filed under: Free AI Agents & Automation Tools
Last verified: September 17, 2026 · Official source ↗
Heads-up: licenses and free tiers change. This page summarizes what the project's official source published on the verified date — confirm the details on the official page before you build on it. We never invent pricing or limits.
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