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featflags vs Flagsmith
Open source and self-hostable. The hosted plans bill API requests and team members. Every claim about Flagsmith below links to its own docs or pricing, read on 12 and 15 October 2026.
Who Flagsmith is for
Teams that want an open-source flag service they can run themselves, from a small app up to air-gapped enterprise installs. Its pitch is “Ship Fearlessly with Feature Flags.”
HomepageOpen sourcePricingPricing
featflags
Unlimited seats and flags on every plan, and no per-user pricing. Free has fixed limits and no overage. Team ([PRICE]/month) and Business ([PRICE]/month) include a monthly traffic allowance and charge [PRICE] per million above it.
Prices aren’t final yet; see pricing.
Flagsmith
Free covers 50,000 requests a month and 1 team member. Start-Up is $40/month billed yearly ($45 monthly) for 1M requests and 3 members. Scale-Up is $250/month billed yearly ($300 monthly) with 5 members included. Extra requests start at $50 per million. Calls that fetch flags or identities count, and Flagsmith’s FAQ says a single-page app generally makes one each time a user loads it, so the bill grows with your traffic.
PricingBilling and API usageFeatures
| Feature | featflags | Flagsmith |
|---|---|---|
| Targeting | Rules on any attribute, individual targets, segments, prerequisites and uploaded lists of customer IDs | Segments on traits with regex and semver operators, plus per-identity overridesSegmentsOperators |
| Percentage rollouts | Percentage rollouts, time-based ramps and release templates on every plan; on Team and Business, templates that advance on their own and guarded releases that pause or roll back when a metric gets worse | Percentage splits; you raise them by handPercentage rollouts |
| Approvals | Team and Business | Change requests on Scale-Up and EnterpriseChange requestsPricing |
| Scheduled changes | Team and Business | Start-Up and up on the pricing page; Scale-Up and up in the docsPricingScheduled flags |
| Audit history | Every change with its diff and a restore; kept 7 days on Free, 1 year on Team, 3 years on Business. On Business, an organization-wide audit log with sign-ins, tokens and support access, exported or streamed to Datadog, Splunk or any HTTPS endpoint | Audit log on Scale-Up and EnterpriseAudit logsPricing |
| Experiments | A/B/n tests on any flag with Bayesian or sequential frequentist results: 1 running at a time on Free, 20 on Team, unlimited on Business. Bandits on Business. No CUPED, holdouts or warehouse analysis | In beta: A/B tests with Bayesian results and guardrail metrics, with events from the JavaScript and Python SDKs only; plan not statedExperimentationExperiment statistics |
| AI assistants (MCP) | Hosted, on every plan. It reads and changes flags as you, or read-only if you choose, and its changes go through your approvals | Official, in early access, hosted or run locally. It changes flags, segments and overrides; its change-request and release tools need a paid planMCP server |
| SDKs | 14: TypeScript (on Cloudflare Workers and Vercel Edge too), React, React Native, Go, Python, Java, Rust, .NET, Ruby, PHP, Elixir, iOS, Android and Flutter | 15: 6 client-side and 9 server-sideSDKs |
| OpenFeature | Providers for Go, Python, Java, .NET, Ruby, PHP, Elixir, iOS, Android and Flutter | Providers for 10 languagesOpenFeature |
| Self-hosting | No, hosted only | Yes, under BSD-3-Clause; change requests, audit logs and SSO need an Enterprise licenceLicenceOpen sourceEnterprise Edition |
| SSO | Google and GitHub sign-in on every plan; SAML or OpenID Connect through your identity provider on Business. No SCIM | SAML on Scale-Up on the pricing page; Enterprise in the docsPricingSAML |
Moving from Flagsmith
There’s no importer for Flagsmith yet. Recreate your flags and segments in the dashboard, or script the move with the featflags CLI, the API or the Terraform provider.
When to pick Flagsmith instead
You want to self-host under an open-source licence.
LicenceYou want to choose the cloud provider and region it runs in, with Private Cloud on Enterprise.
Private cloudPricingYou’re on Enterprise anyway and want changes pushed to clients in real time.
Real-time flags
Other comparisons
- featflags vs LaunchDarklyBoth have unlimited seats. LaunchDarkly also bills each server connection and each client-side user.
- featflags vs UnleashOpen source and self-hostable, priced per seat on the paid plans.
- featflags vs ConfigCatClosest to us on pricing: unlimited seats and a usage meter, with flag caps on the cheaper plans.
- featflags vs PostHogFlags inside an analytics suite, billed per flag request, with no seat charge.
- featflags vs StatsigAn experimentation platform where flag checks are free. Now part of Amplitude.
- featflags vs GrowthBookOpen-source experimentation and flags, priced per seat plus metered requests.
Try featflags with your own flags
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