Our take
Pick Flagsmith if app teams who will stay on Cloud Free at $0 (50k requests/month, 1 member) or self-host while they ship a first Features table, then move to Start-Up at $40/month billed yearly ($45 monthly) when they need 1M requests, 3 members, scheduled flags, and email support. 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
open-source feature-flag desk
Best for
Flagsmith Flags you start at $0
GrowthBook Flags and A/B tests you start at $0 (1 project, no card)
Free plan
Flagsmith $0 · up to 50,000 requests/month. Up to 100,000 users in experiments. 1 team member. Unlimited feature flags, environments, identities, and segments (fair-usage). Additional API calls start at $50/million/month and decrease with volume
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
Lowest paid
Flagsmith Overage $7
GrowthBook Overage (Pro) $30
Next step up
Flagsmith
GrowthBook Pro $40/mo
Watch out
Flagsmith Free is 50k requests/month and 1 member
GrowthBook Starter is 1 project and 1M events
Last checked
Flagsmith 2026-10-23 · flagsmith.com/pricing
GrowthBook 2026-10-22 · growthbook.io/pricing
app teams who will stay on Cloud Free at $0 (50k requests/month, 1 member) or self-host while they ship a first Features table, then move to Start-Up at $40/month billed yearly ($45 monthly) when they need 1M requests, 3 members, scheduled flags, and email support.
Read the Flagsmith pageproduct/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 page