Best Feature Flags · head-to-head
Flagsmith vs GrowthBook
A sourced, side-by-side comparison for feature flags. Flagsmith has the lower entry price. Every figure links to the vendor's own page and the date we captured it.
At a glance
- Price: Flagsmith $0/mo vs GrowthBook $0/mo — Flagsmith is cheaper to start.
- Free tier: Flagsmith Yes; GrowthBook Yes.
- HIPAA: Flagsmith —; GrowthBook Yes.
Side by side
| Flagsmith | GrowthBook | |
|---|---|---|
| Entry price | $0/mo (Free) | $0/mo (Starter) |
| Free tier | Yes | Yes |
| HIPAA (BAA) | — | Yes |
| SOC 2 | Yes | Yes |
| GDPR | Yes | Yes |
| Best for | Teams wanting open-source self-hosted control | Data teams wanting warehouse-native experimentation without vendor data access |
Sources — Flagsmith: flagsmith.com (verified 2026-06-14). GrowthBook: growthbook.io (verified 2026-06-14).
Key features
Flagsmith: Open-source self-hosted option (full feature parity); OpenFeature provider support for vendor-agnostic evaluation; Multi-variate flags with A/B and MVT testing built in; Scheduled flag changes on paid plans
GrowthBook: Warehouse-native architecture — aggregate data only, no PII ever leaves customer's data warehouse; Advanced statistics: CUPED variance reduction, sequential testing, multi-arm bandits; Visual A/B test editor (no-code experiment creation); Open-source self-hosted option with full feature parity; SOC 2 Type II + ISO 27001 certified