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 LangWatch
Our take
Pick Braintrust if aI teams who will write a scorer and pay when processed data or scores blow past Starter. Pick LangWatch if agent teams who will pay a core seat and send events from production. Skip Braintrust if developers who only want a $0 request table (Helicone). Skip LangWatch if teams that only want a $0 request proxy (Helicone).
Best for
Braintrust Measure the agent before you ship
LangWatch Watch the agent and score it
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
LangWatch $0 · €0. 50k events / month. 14-day data access. 2 users. 3 scenarios, 3 simulations, 3 custom evals. GitHub / Discord support. No credit card
Lowest paid
Braintrust Pro $249/mo
LangWatch Growth €29
Coding agent
Braintrust Loop agent
LangWatch Agent simulations
Runs where
Braintrust
LangWatch Hosted
Watch out
Braintrust $0 is the platform fee
LangWatch €29 is per core-seat
Last checked
Braintrust 2026-10-22 · braintrust.dev/pricing
LangWatch 2026-10-22 · langwatch.ai/pricing
Which one, then?
Pick LangWatch if
agent teams who will pay a core seat and send events from production.
Read the LangWatch page