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

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