Flagsmith vs GrowthBook
Updated June 2026 · A structured head-to-head comparison.
Open-source flags and A/B testing.
The verdict
Both Flagsmith and GrowthBook are credible feature flags tools, and the right pick comes down to your priorities.
Flagsmith — Open-source feature flags.
GrowthBook — Open-source flags and A/B testing.
Flagsmith vs GrowthBook: side by side
| Dimension | Flagsmith | GrowthBook |
|---|---|---|
| Starting price | Free – $45/mo | Free – $20/user/mo |
| Free plan | Yes | Yes |
| Pricing model | Freemium | Freemium |
| Best for | Developers | Product Teams, Data Teams |
| Platforms | Web, Self Hosted, Api | Web, Self Hosted, Api |
| Rating | 4.5/5 | 4.6/5 |
Flagsmith key facts
- Vendor
- Flagsmith
- Pricing
- Freemium — Free – $45/mo
- Free tier
- Yes
- Platforms
- Web, Self Hosted, Api
- Best for
- Developers
- Editor rating
- 4.5 / 5
- Founded
- 2018
- Headquarters
- London, UK
GrowthBook key facts
- Vendor
- GrowthBook
- Pricing
- Freemium — Free – $20/user/mo
- Free tier
- Yes
- Platforms
- Web, Self Hosted, Api
- Best for
- Product Teams, Data Teams
- Editor rating
- 4.6 / 5
- Founded
- 2020
- Headquarters
- San Francisco, CA, USA
Frequently asked questions
Is Flagsmith better than GrowthBook?
Neither is universally better — GrowthBook edges ahead on overall rating, but the best choice depends on price, platforms, and your use case. See the side-by-side table above.
Is Flagsmith or GrowthBook cheaper?
Flagsmith is the more affordable of the two to get started, at free – $45/mo. Flagsmith starts at free – $45/mo; GrowthBook starts at free – $20/user/mo.
Can Flagsmith replace GrowthBook?
Yes for most teams — both are feature flags tools with heavily overlapping features. The main trade-offs are pricing and platform support, covered in the comparison above.