Our take
Pick GrowthBook if product/eng teams who will stay on Starter Free $0 (1 project, 1M warehouse events, no card) while they ship a first flag, then buy Pro at $40 per seat / month when they need 3 projects, 2M events, and advanced experiment stats. Pick Langfuse if teams shipping LLM apps who need traces and a cost tile, not another chat UI. Skip Langfuse if people who only want a gateway (LiteLLM) or a framework
Best for
GrowthBook Flags and A/B tests you start at $0 (1 project, no card)
Langfuse Debug and cost-track generations
Free plan
GrowthBook $0 · 1 project. Bring your own warehouse. Managed warehouse option. 1M events/mo. 1M CDN requests/mo. 5 GB CDN bandwidth/mo. No card
Langfuse $0 · for the MIT core. ee/ is not the community license
Lowest paid
GrowthBook Overage (Pro) $30
Langfuse Enterprise $2/mo
Next step up
GrowthBook Pro $40/mo
Langfuse Core $29/mo
Runs where
GrowthBook
Langfuse Local or hosted
Watch out
GrowthBook Starter is 1 project and 1M events
Langfuse Hobby is two users and 30-day retention
Last checked
GrowthBook 2026-10-22 · growthbook.io/pricing
Langfuse 2026-10-19 · langfuse.com/pricing
product/eng teams who will stay on Starter Free $0 (1 project, 1M warehouse events, no card) while they ship a first flag, then buy Pro at $40 per seat / month when they need 3 projects, 2M events, and advanced experiment stats.
Read the GrowthBook pageteams shipping LLM apps who need traces and a cost tile, not another chat UI.
Read the Langfuse page
