Detect AI-generated text and fingerprint which LLM wrote it. Open-source GPTZero alternative. Zero dependencies, works offline.
In the AI & ML space, lmscan takes a focused approach. It focuses on identifying AI-generated text and determining which LLM produced it, even offline. lmscan is an open-source project aimed at educators, researchers, and content verifiers. The project is open source (Apache-2.0). The product ships for the web and the command line.
Behind lmscan is stef41, and the product first shipped in 2026. The project is developed in the open on GitHub with 18 stars and 26 commits in the last 90 days. Across PulseGate's embedding index, lmscan has few near neighbours, marking it as relatively distinct. Among its 5 catalogued features are AI text detection, LLM fingerprinting, and offline mode.
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