Pick Lunary if
app teams who will pay Team $20/user/month (or self-host the AGPL repo) to open a first Generations table — not Langfuse first unless they want that OSS trace warehouse.
Read the Lunary pageLunary vs Opik
Our take
Pick Lunary if you're on a app team who will pay Team $20/user/month (or self-host the AGPL repo) to open a first Generations table — not Langfuse first unless they want that OSS trace warehouse. Pick Opik if you're on a agent team who will stay on OSS $0 or Free Cloud $0 (25k spans, 10 members), then buy Pro Cloud at $19/month when they need 100k spans and 50 seats.
Opik
agent trace + eval desk
Best for
Lunary See what the model just did and edit that prompt
Opik Spans you can self-host at $0 or rent from $0 Cloud / $19 Pro
Free plan
Lunary $0 · you bring compute. Existing Free cloud workspaces stay grandfathered; new ones do not start at $0
Opik $0 · self-host. Full observability + agent testing. Same codebase as hosted. Agent Playground included
Lowest paid
Lunary Team $20/user/mo
Opik Not published by the vendor
Coding agent
Lunary
Opik Experiments + datasets
Runs where
Lunary Local or hosted
Opik Local; you host it
Watch out
Lunary New cloud starts at $20/user
Opik Free Cloud is 25k spans
Last checked
Lunary 2026-10-27 · lunary.ai/pricing
Opik 2026-10-22 · comet.com/site/pricing
Which one, then?
Pick Opik if
agent teams who will stay on OSS $0 or Free Cloud $0 (25k spans, 10 members), then buy Pro Cloud at $19/month when they need 100k spans and 50 seats.
Read the Opik page