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Inspect vs TruLens: catalog facts
Inspect	TruLens
Free Free and open source.	Free Free and open source.
Web, Command line	Windows, macOS, Linux
Over 200 pre-built evaluations ready to run Sandboxed execution in Docker, Kubernetes and other systems	OpenTelemetry-native tracing of every agent step Judges explain their scores, not just give numbers
Writing new evaluations requires Python Aimed at researchers rather than casual users	Aimed at developers comfortable writing code LLM judges add their own model calls and cost
Downloadable app	Downloadable app
Open source	Open source
License not stated	License not stated
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 1, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.