ConfigCat vs Flagsmith
An independent, review-free comparison compiled by the SaaSTracker editorial team. Both products are profiled in full, and neither can pay for placement here.
Still shortlisting? Browse the best in Product Analytics & Session Replay for every option we track, with award winners called out.
The short answer
Both sides assessedConfigCat compared with Flagsmith
Flagsmith is cheaper for a small team that needs nothing but flags: unlimited flags even on its free tier and Start-Up at $40 a month billed yearly for three seats, against ConfigCat Pro at $110 with a 100-flag cap. ConfigCat wins once the team grows or security enters the picture, with unlimited seats on every plan and SSO, SAML, and SCIM included free where Flagsmith starts them at $250 a month. Flagsmith also has a free open source self-hosted build; ConfigCat's on-premise edition is a commercial $4,500 a month tier.
Flagsmith compared with ConfigCat
ConfigCat is the closest hosted rival without an open source core. It gives unlimited seats on every plan and puts SSO, SAML, and SCIM on its free tier, where Flagsmith starts SSO at the $250 Scale-Up tier, but it caps flags at 10 per product on Free and 100 on the $110 a month Pro plan, while Flagsmith's flags are unlimited everywhere and Start-Up costs $40 billed yearly. Small teams that want cheap, unlimited flags and a free self-hosted build take Flagsmith; larger teams that want flat billing and SSO without the governance jump should price ConfigCat.
Choose ConfigCat if
Small and mid-sized development teams who want a hosted feature flag service with flat, predictable billing, where adding engineers, product managers, or users never changes the price, and who need SSO and a clean ISO 27001 answer without paying for an enterprise tier to get them.
Choose Flagsmith if
Engineering teams at small software companies who want a dependable feature flag and remote config service with published pricing that starts at zero, and especially teams who want the option to self-host the same product on their own infrastructure rather than take a hard runtime dependency on a vendor.
Side by side
13 attributes| Attribute | ConfigCat | Flagsmith |
|---|---|---|
| Category | Product Analytics | Product Analytics |
| Starting price | $0 (Forever Free), then $110 per month billed annually or $120 billed monthly (Pro) | $0 (Free), then $40 per month billed yearly (Start-Up) |
| Pricing model | Freemium subscription with flat plan prices, metered on config JSON downloads and network traffic, with unlimited seats, monthly active users, and service connections on every plan. Extra quota is sold in fixed blocks, and a Dedicated plan covers private cloud or on-premise deployment. | Freemium subscription metered on API requests per month with a seat cap per tier, plus a free open source self-hosted edition and an Enterprise tier for private or on-premises hosting. |
| Free plan | Forever Free, no card: 5 million config JSON downloads and 20 GB of traffic a month, 10 flags and 2 environments per product across 2 products, 2 segments, unlimited seats, SSO and SAML, 1 webhook, and 7-day audit log retention. | Free covers 50,000 API requests a month for one team member, with unlimited feature flags, environments, identities, and segments plus API access, subject to a fair usage policy. |
| Free trial | No | 14 days on Start-Up and Scale-Up |
| Best for | Small and mid-sized development teams who want a hosted feature flag service with flat, predictable billing, where adding engineers, product managers, or users never changes the price, and who need SSO and a clean ISO 27001 answer without paying for an enterprise tier to get them. | Engineering teams at small software companies who want a dependable feature flag and remote config service with published pricing that starts at zero, and especially teams who want the option to self-host the same product on their own infrastructure rather than take a hard runtime dependency on a vendor. |
| Setup time | Under an hour to a first flag in production: sign up with an email, create a flag, install the SDK for your language with the environment's SDK key, and wrap a code path. Choosing polling intervals and, for EU customers, setting the dataGovernance option in every SDK to match the dashboard are the two decisions worth getting right on day one. | An hour to a first flag in production. Create a project and environments, install the SDK, wrap one code path, and ship. The work that takes longer is deciding on naming conventions and who is allowed to change production. |
| Learning curve | Low. The model is products, environments, configs, and flags, with targeting rules, segments, and percentage options on top, and the dashboard is usable by product managers as well as developers. The concept that trips people up is that updates arrive on the next poll rather than instantly, which is a tradeoff between speed and download count that you control. | Low for developers and effectively unavailable to non-developers. The mental model is small: environments hold values, identities carry traits, segments are rules over traits. The subtlety worth learning early is the difference between remote and local evaluation, because it determines both your latency and your bill. |
| Platforms | JavaScript, React, Angular, and Vue, Node.js, Bun, Deno, and Cloudflare Workers, .NET and ASP.NET Core, Java and Spring Boot, Go, PHP and Laravel, Python, Ruby, Elixir, Android and Kotlin Multiplatform, iOS and macOS (Swift), Flutter and Dart, React Native, C++ and Rust, Unity and Unreal Engine, Chromium extension, OpenFeature providers, ConfigCat Proxy | JavaScript and React, React Native and Flutter, iOS and Swift, Android and Kotlin, Node, Python, Java and Spring Boot, .NET, Go, PHP, Ruby, Rust, OpenFeature providers |
| Compliance | ISO/IEC 27001:2022, GDPR | GDPR, Enterprise security review supported; confirm the current SOC 2 and ISO 27001 scope with the vendor during procurement |
| Founded | 2018 | 2018 |
| Headquarters | Budapest, Hungary | London, United Kingdom |
| Ownership | Bootstrapped, privately held (legal entity ConfigCat Kft) | Bootstrapped, privately held (legal entity Bullet Train Ltd) |
Strengths and limitations
ConfigCat
Strengths
- Unlimited seats, monthly active users, service connections, and flag reads on every plan, so neither headcount nor user growth changes the bill.
- SSO, SAML 2.0, SCIM provisioning, and two factor authentication appear on the pricing table for every plan including free, where Flagsmith gates SSO at $250 a month and LaunchDarkly gates SCIM behind Enterprise.
- Local evaluation in every SDK means no per-check network call, no user data uploaded for targeting, and cached values that keep working if the CDN is unreachable.
- Broad SDK coverage, from Cloudflare Workers, Bun, and Deno to Unity, Unreal Engine, C++, and Elixir, with all SDKs open source on GitHub.
Limitations
- No analytics and no experiment statistics. Percentage options split traffic and integrations send evaluations to Amplitude, Mixpanel, Google Analytics, or Segment, but ConfigCat never tells you whether a variation won.
- Tight flag and environment limits on the cheaper plans: 10 flags and 2 environments per product on Free, 100 flags and 3 environments on Pro, so structure rather than traffic forces the upgrade to $325 a month.
- Approval flow and scheduled changes only shipped on August 27, 2026, work only on V2 configs, and the pricing page does not say which plans include them.
- The service itself is closed source; the only self-hosted path is the commercial on-premise edition priced with the Dedicated plan at $4,500 a month billed annually, not a free community build like Flagsmith or Unleash.
Flagsmith
Strengths
- Unlimited flags, environments, identities, and segments on every tier including free, so the plan limit is a request meter rather than an artificial cap on how you model your product.
- A genuine open source self-hosted edition with Docker, Helm, and Kubernetes operator paths, which gives you an exit and satisfies data residency requirements no hosted-only vendor can meet.
- The Edge API is real infrastructure rather than a marketing claim: eight AWS regions, Lambda@Edge, DynamoDB global tables, latency routing, and regional failover.
- Local evaluation in server-side SDKs removes Flagsmith from your request path entirely, which is the correct answer to the availability objection every engineer raises about flag services.
Limitations
- No experiment analysis engine. Flagsmith splits traffic and stops there; there is no sequential testing, no CUPED, no automatic significance calculation, and no guardrail metrics, so measurement lives in another vendor.
- The free tier is limited to a single team member, which means any collaboration at all requires the paid plan regardless of how few requests you make.
- SSO, change requests, role based access control, and audit logs are gated to the $250 Scale-Up tier, a six times price increase over Start-Up for governance features rather than product capability.
- The self-hosted edition is free to license but requires you to run and upgrade Postgres, Redis, and the API, and some enterprise governance features are not in the open source build.
Pricing compared
ConfigCat
Freemium subscription with flat plan prices, metered on config JSON downloads and network traffic, with unlimited seats, monthly active users, and service connections on every plan. Extra quota is sold in fixed blocks, and a Dedicated plan covers private cloud or on-premise deployment.
- Forever Free$0
- Pro$110
- Smart$325
- Enterprise$900
- Dedicated$4,500
ConfigCat's pricing is easy to model once you stop thinking about users. A backend service polling once a minute uses about 43,000 downloads a month per running instance, so ten instances sit comfortably inside the free 5 million. Browser and mobile clients are the variable: if each of 100,000 monthly users triggers ten downloads, that is a million downloads, still inside Free, and 1 million users on the same pattern fits Pro's 25 million with room to spare. For most small businesses the download meter will never bind; the flag and environment limits will. Ten flags per product on Free and 100 on Pro push a flag-heavy team to Smart at $325 a month well before traffic does. Against the neighbors the arithmetic is simple: Flagsmith's Start-Up is $40 a month billed yearly for three seats, cheaper for a small team that does not need SSO; Unleash is $75 per seat, so ConfigCat Pro is cheaper for any team of two or more; LaunchDarkly's free tier gives more flags but meters client-side monthly active users above 1,000, which ConfigCat never does. The real value is SSO, SAML, and SCIM at no extra cost, which elsewhere costs $250 a month or an enterprise contract.
Flagsmith
Freemium subscription metered on API requests per month with a seat cap per tier, plus a free open source self-hosted edition and an Enterprise tier for private or on-premises hosting.
- Free$0
- Start-Up$40
- Scale-Up$250
- EnterpriseCustom
- Open source self-hosted$0
At $40 a month for a million requests and three seats, Flagsmith is among the cheapest credible flag services available, and the free tier is a real product rather than a teaser. Modelling a bill is straightforward once you understand the meter. A product with 10,000 monthly users evaluated through server-side SDKs in local evaluation mode generates almost no billed requests at all and sits comfortably on Start-Up at $40. The same product at 100,000 monthly users, evaluated from the browser at a handful of requests per user per month, plausibly lands between 1 and 5 million requests, which means Start-Up plus overage at $50 per million or a move to Scale-Up at $250. The uncomfortable part of the curve is not volume, it is governance: SSO, change requests, and audit logs all sit behind the $250 tier, so a team that needs approvals pays six times more for the same flags. Compared with LaunchDarkly's per-seat and per-connection model the total is usually far lower, and compared with GrowthBook you are paying less but getting no statistics engine.
Editorial verdict on each
ConfigCat
ConfigCat is the flag service to pick if you want billing that ignores your team size and your user count. Unlimited seats and monthly active users on every plan, a download meter that local evaluation keeps small, SSO, SAML, and SCIM without an enterprise tier, an EU-only CDN, and ISO 27001 add up to a strong offer from a small, bootstrapped Budapest company that keeps shipping. Pro at $110 a month billed annually is fair for a team of any size, and for teams of three or more it undercuts Unleash's per-seat model outright. Be clear about what it is not. It is not product analytics despite the shelf it sits on, and it will not tell you whether an experiment won; pair it with Mixpanel, Amplitude, or PostHog for that. Watch the structural limits more than the traffic ones, because 10 flags on Free and 100 on Pro push a busy codebase to Smart at $325 before downloads ever matter, and if you need a free self-hosted build or long-established approval workflows, Flagsmith and Unleash are the better fits.
Read the full ConfigCat profileFlagsmith
Flagsmith is the sensible feature flag purchase for a small engineering team that wants release control without an enterprise contract. Unlimited flags and environments on every tier, a real Edge API across eight regions, local evaluation that keeps the vendor out of your request path, and an open source codebase you can run yourself add up to more infrastructure quality than the $40 a month price suggests. Buy it if your problem is shipping safely: dark launches, percentage rollouts, kill switches, remote config for mobile. Do not buy it expecting experimentation, because the statistics simply are not there and pretending otherwise leads to teams shipping on gut feel with a flag as decoration. Watch two things during evaluation: whether your integration is chatty enough to blow past the request meter, and whether you will need SSO and approvals soon, because that governance jump takes you from $40 to $250 without adding a single product capability.
Read the full Flagsmith profileConfigCat profile last reviewed 2026-09-26; Flagsmith last reviewed 2026-08-22. Pricing is compiled from public sources and can change without notice. See our methodology.
The best in Product Analytics & Session Replay
15 trackedProduct analytics tools track what users do inside an application, funnels, retention, feature adoption, and session replay, so teams can see where activation breaks rather than guessing.
Product analytics that kept buying the rest of the stack: experiments, session replay, and a CDP under one roof, with 2 million free events a month.
A free plan covering one million events a month with unlimited seats means a 10,000 user product pays Mixpanel nothing for genuinely deep analytics.
Relaunched in 2025 around autocapture, autoconfiguration, and Ask AI, with a 2026 LLM Acquisition report, Kissmetrics is the roster's genuine comeback story.
Agent Analytics, generally available in December 2025, measures how AI agents behave inside products, a capability nothing else in this roster ships.
Autocapture records every interaction from one snippet in under an hour, so teams define events after the fact instead of instrumenting anything first.
Frequently asked questions
6 questionsWhat is the difference between ConfigCat and Flagsmith?
Flagsmith is cheaper for a small team that needs nothing but flags: unlimited flags even on its free tier and Start-Up at $40 a month billed yearly for three seats, against ConfigCat Pro at $110 with a 100-flag cap. ConfigCat wins once the team grows or security enters the picture, with unlimited seats on every plan and SSO, SAML, and SCIM included free where Flagsmith starts them at $250 a month. Flagsmith also has a free open source self-hosted build; ConfigCat's on-premise edition is a commercial $4,500 a month tier.
Is ConfigCat or Flagsmith cheaper?
ConfigCat starts at $0 (Forever Free), then $110 per month billed annually or $120 billed monthly (Pro). Flagsmith starts at $0 (Free), then $40 per month billed yearly (Start-Up). The billing models differ, so the entry price is rarely the whole cost. ConfigCat pricing model: Freemium subscription with flat plan prices, metered on config JSON downloads and network traffic, with unlimited seats, monthly active users, and service connections on every plan. Flagsmith pricing model: Freemium subscription metered on API requests per month with a seat cap per tier, plus a free open source self-hosted edition and an Enterprise tier for private or on-premises hosting.
Does ConfigCat or Flagsmith have a free plan?
ConfigCat has a free plan. Forever Free, no card: 5 million config JSON downloads and 20 GB of traffic a month, 10 flags and 2 environments per product across 2 products, 2 segments, unlimited seats, SSO and SAML, 1 webhook, and 7-day audit log retention. Flagsmith has a free plan. Free covers 50,000 API requests a month for one team member, with unlimited feature flags, environments, identities, and segments plus API access, subject to a fair usage policy. Trial terms: 14 days on Start-Up and Scale-Up.
Who should choose ConfigCat?
Small and mid-sized development teams who want a hosted feature flag service with flat, predictable billing, where adding engineers, product managers, or users never changes the price, and who need SSO and a clean ISO 27001 answer without paying for an enterprise tier to get them.
Who should choose Flagsmith?
Engineering teams at small software companies who want a dependable feature flag and remote config service with published pricing that starts at zero, and especially teams who want the option to self-host the same product on their own infrastructure rather than take a hard runtime dependency on a vendor.
What are the best alternatives to ConfigCat and Flagsmith?
SaaSTracker profiles 15 products in Product Analytics & Session Replay. The Summer 2026 awards in the category went to Amplitude (Category Leader), Mixpanel (Best Value), Kissmetrics (Momentum). Every profile is compiled from primary sources, so a shortlist can be built from pricing, limitations, and fit rather than from star ratings.
