Head to head
ConfigCat vs Flagsmith
As a feature flag API, ConfigCat rates higher on the APIbenchmarks Index, 83.2 to 79.1, a 4.1-point gap. Here is how they compare on each criterion.
Criterion by criterion
| Criterion | ConfigCat | Flagsmith |
|---|---|---|
| Documentation & DX | ||
| Reliability | ||
| Ecosystem & SDKs | ||
| Accessibility | ||
| APIbenchmarks Index | 83.2 | 79.1 |
Specifications
| ConfigCat | Flagsmith | |
|---|---|---|
| Best for | Simple flat-priced feature flags for any team size | Open-source, self-hostable feature flags + remote config |
| Free tier | Free: 10 flags, unlimited seats, unlimited flag reads | Free cloud: 50k requests/mo, 1 seat, unlimited flags (self-host fully free) |
| Pricing | Flat tier (config fetches) | Per request (API calls) |
| Official SDKs | 12 languages | 12 languages |
Is ConfigCat better than Flagsmith?
On the APIbenchmarks Index, ConfigCat rates higher (83.2 vs 79.1). It leads on the four weighted criteria, but price is reported separately, so the best choice still depends on your budget.
Verdict in one line
ConfigCat leads by 4.1 points (83.2 vs 79.1) and wins 4 of 4 criteria.
Winner by criterion
| Criterion | Winner | ||
|---|---|---|---|
| Documentation & DX | 84 | 78 | |
| Reliability | 78 | 74 | |
| Ecosystem & SDKs | 82 | 80 | |
| Accessibility | 90 | 86 |
Choose ConfigCat if… / choose Flagsmith if…
- →documentation & dx matters most to you (84 vs 78)
- →reliability matters most to you (78 vs 74)
- →ecosystem & sdks matters most to you (82 vs 80)
- →accessibility matters most to you (90 vs 86)
- →your use case matches its focus: simple flat-priced feature flags for any team size
- →your use case matches its focus: open-source, self-hostable feature flags + remote config
Pricing side by side
- Model
- Flat tier (config fetches)
- Free tier
- Free: 10 flags, unlimited seats, unlimited flag reads
- Forever Free$0/mo
- Pro$110/mo
- Smart$325/mo
- Enterprise$900/mo
- Dedicated$4,500/mo
- Model
- Per request (API calls)
- Free tier
- Free cloud: 50k requests/mo, 1 seat, unlimited flags (self-host fully free)
- Free$0
- Start-Up$40-45/mo
- Scale-Up$250-300/mo
- EnterpriseCustom
- Open Source (self-hosted)Free
Vendor-published pricing, verified 2026-06-27 (ConfigCat) and 2026-06-27 (Flagsmith).
SDK and language coverage
Both · 4
JavaScript (Browser/Node/Deno/Bun)GoPythonPHP
Only ConfigCat · 8
.NETReactCloudflare WorkerJava / AndroidKotlin MultiplatformRuby / Rust / Elixir / C++Swift (iOS) / Dart (Flutter)Unity / Unreal Engine
Only Flagsmith · 8
React / React NativeFlutterSwift/iOSKotlin/AndroidNode.jsJavaRuby.NET / C#
Strengths and weaknesses
- +Flat pricing with unlimited team members, MAUs/contexts and flag reads on every tier (including Free), no per-seat or per-MAU charges
- +Genuinely simple to adopt; many teams self-serve in hours without sales contact
- +Generous Forever Free plan with unlimited seats
- –No built-in experimentation/A-B test result analytics, intentionally not an experimentation platform
- –Segment and target-user management can become messy as flag count grows
- –UI has a learning curve for newcomers
- +Fully open-source (BSD-3) core that can be self-hosted with no request limits or per-seat fees
- +Broad official SDK coverage: 15+ client- and server-side languages/platforms
- +Genuinely usable free SaaS tier (50k req/mo) plus low Start-Up pricing vs LaunchDarkly
- –No built-in experimentation stats engine; needs Amplitude/Mixpanel/Statsig to determine winners
- –Lacks advanced safety features like automated rollbacks and guardrail-metric monitoring
- –On-prem/private hosting and SCIM/LDAP gated behind custom-priced Enterprise tier
ConfigCat vs Flagsmith: questions
- Which has better documentation, ConfigCat or Flagsmith?
- ConfigCat scores higher on documentation and developer experience: 84 vs 78 out of 100.
- Which is more reliable, ConfigCat or Flagsmith?
- ConfigCat scores higher on reliability: 78 vs 74 out of 100.
- Do ConfigCat and Flagsmith have a free tier?
- ConfigCat: yes (Free: 10 flags, unlimited seats, unlimited flag reads). Flagsmith: yes (Free cloud: 50k requests/mo, 1 seat, unlimited flags (self-host fully free)).
- How are ConfigCat and Flagsmith priced?
- ConfigCat: Flat tier (config fetches). Flagsmith: Per request (API calls).
- Which has more official SDKs?
- Both list 12 official SDKs.