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 Windmill if platform teams who will run Community Edition at $0 (≤50 users, 3 workspaces) and only buy EE when they need SAML, audit, or more than 10 SSO users.
Best for
GrowthBook Flags and A/B tests you start at $0 (1 project, no card)
Windmill Scripts → endpoints / workflows / UIs you can self-host
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
Windmill $0 · /month. Unlimited executions. 3 workspaces. Max 50 users. 10 SSO users. 4 groups. 10 GiB object storage. 100 email triggers/day. 100 app guests / 30 days. Discord support
Lowest paid
GrowthBook Overage (Pro) $30
Windmill Enterprise Edition $20/mo
Next step up
GrowthBook Pro $40/mo
Windmill Compute units $100/mo
Runs where
GrowthBook
Windmill Local; you host it
Watch out
GrowthBook Starter is 1 project and 1M events
Windmill Community caps SSO at 10 and workspaces at 3
Last checked
GrowthBook 2026-10-22 · growthbook.io/pricing
Windmill 2026-10-22 · windmill.dev/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 pageplatform teams who will run Community Edition at $0 (≤50 users, 3 workspaces) and only buy EE when they need SAML, audit, or more than 10 SSO users.
Read the Windmill page
