Pick Braintrust if
aI teams who will write a scorer and pay when processed data or scores blow past Starter.
Read the Braintrust pageBraintrust vs Opik
Our take
Pick Braintrust if aI teams who will write a scorer and pay when processed data or scores blow past Starter. 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. Skip Braintrust if developers who only want a $0 request table (Helicone).
Opik
agent trace + eval desk
Best for
Braintrust Measure the agent before you ship
Opik Spans you can self-host at $0 or rent from $0 Cloud / $19 Pro
Free plan
Braintrust $0 · /month. $10 model credits + token rates. 1 GB processed data, then $4/GB. 10k scores, then $2.50/1k. 14-day retention. Unlimited users, projects, datasets, playgrounds, experiments. No credit card
Opik $0 · self-host. Full observability + agent testing. Same codebase as hosted. Agent Playground included
Lowest paid
Braintrust Pro $249/mo
Opik Not published by the vendor
Coding agent
Braintrust Loop agent
Opik Experiments + datasets
Runs where
Braintrust
Opik Local; you host it
Watch out
Braintrust $0 is the platform fee
Opik Free Cloud is 25k spans
Last checked
Braintrust 2026-10-22 · braintrust.dev/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