# Alternatives to Flagsmith Flagsmith is an open-source feature flag, remote config, and A/B testing platform; self-hostable or cloud. Flagsmith ranks #1 of 8 in Feature flag platforms, with an Alt Score of 100. It is licensed under BSD-3-Clause, open source with paid hosting from $45/month and available on the web. 13 of 13 checklist rows are verified against a public source. Source: https://altcatalog.com/alternatives/flagsmith/ Category: Feature flag platforms ## Where Flagsmith stands out - **Open source** — 3 of 8 apps with a verified answer have this - **Self-hostable** — 4 of 8 apps with a verified answer have this ## Overview - **Who it's for**: Engineering teams that want feature flags, remote config, and progressive rollouts without vendor lock-in, including regulated organizations (banking, healthcare, government) that need to self-host or keep flag data in their own infrastructure. - **What you get**: Boolean and multivariate feature flags with remote configuration, user segmentation and identity-level overrides, percentage-based staged rollouts and kill switches, A/B/MVT testing, audit logs, change-request approval workflows, SDKs for 15+ languages/frameworks with local (in-process) flag evaluation, and integrations with tools like Datadog, Amplitude, Segment, Jira, and Slack. - **How it works**: Teams create flags and segments in the Flagsmith dashboard (cloud SaaS, private cloud, or self-hosted via Docker/Kubernetes/Helm), then evaluate them from client and server SDKs; server SDKs can run in Local Evaluation Mode using a ported flag-evaluation engine so decisions happen in-process without a network call, while an Edge API/Edge Proxy provides low-latency global evaluation for cloud deployments. ## Profile - **License**: BSD-3-Clause (verified 2026-07-17) - **Pricing model**: OSS + paid hosting (verified 2026-07-17) - **Starts at**: $45/month (verified 2026-07-17) - **Platforms**: Web - **Status**: active (verified 2026-07-17) ## Ranked alternatives | # | App | Alt Score | Licence | Platforms | |---|-----|-----------|---------|-----------| | 1 | [Unleash](https://altcatalog.com/alternatives/unleash.md) | 100 | AGPL-3.0-or-later | Web | | 2 | [GrowthBook](https://altcatalog.com/alternatives/growthbook.md) | 96 | MIT (with GrowthBook Enterprise License for enterprise-only directories) | Web | | 3 | [DevCycle](https://altcatalog.com/alternatives/devcycle.md) | 86 | Proprietary | Web | | 4 | [LaunchDarkly](https://altcatalog.com/alternatives/launchdarkly.md) | 86 | Proprietary | Web | | 5 | [ConfigCat](https://altcatalog.com/alternatives/configcat.md) | 83 | Proprietary (platform); MIT (SDKs) | Web | | 6 | [Split](https://altcatalog.com/alternatives/split.md) | 83 | Proprietary | Web | | 7 | [Reflag](https://altcatalog.com/alternatives/bucket.md) | 72 | Proprietary (platform); MIT (SDKs) | Web | Alt Score = Verified coverage (90%) + Visibility (10%). See https://altcatalog.com/how-alt-score-works/ ## Feature comparison Legend: Yes / No / Partial / ? (not verified). | Feature flag platforms checklist | Flagsmith | Unleash | GrowthBook | DevCycle | LaunchDarkly | ConfigCat | |---|---|---|---|---|---|---| | Pricing model | OSS + paid hosting | OSS + paid hosting | OSS + paid hosting | Freemium | Freemium | Freemium | | Starts at | $45/month | $75/seat/month (USD) | $40/seat/month | $500 USD/month (Business plan, billed annually; $625/month billed monthly) | $10/mo per Service Connection (Foundation plan) | $110/month | | License | BSD-3-Clause | AGPL-3.0-or-later | MIT (with GrowthBook Enterprise License for enterprise-only directories) | Proprietary | Proprietary | Proprietary (platform); MIT (SDKs) | | Platforms | Web | Web | Web | Web | Web | Web | | Open source | Yes | Yes | Yes | No | No | No | | Self-hostable | Yes | Yes | Yes | No | No | Yes | | Percentage / gradual rollouts | Yes | Yes | Yes | Yes | Yes | Yes | | User targeting & segments | Yes | Yes | Yes | Yes | Yes | Yes | | A/B testing / experimentation | Yes | Yes | Yes | Yes | Yes | Partial | | Kill switches | Yes | Yes | Yes | Yes | Yes | Yes | | SDKs (server + client) | Yes | Yes | Yes | Yes | Yes | Yes | | Local evaluation / edge | Yes | Yes | Yes | Yes | Yes | Yes | | Audit logs | Yes | Yes | Yes | Yes | Yes | Yes | | Approval workflows | Yes | Yes | Yes | Yes | Yes | ? | | Analytics integration | Yes | Yes | Yes | Yes | Yes | Yes | | Free tier flag limit | Yes | Yes | Yes | Yes | Yes | Yes | | SSO / SAML | Yes | Yes | Partial | Yes | Yes | Yes | ## Sources Sources for Flagsmith. Each alternative is sourced on its own page. - **License**: BSD-3-Clause — (verified 2026-07-17) - Note: LICENSE.md's text is the standard BSD 3-Clause license; README.md names it explicitly in prose (not just a badge): 'The majority of our platform is open source under the BSD-3-Clause license. A small - Quote: “Redistribution and use in source and binary forms, with or without modification, are permitted provided that the following conditions are met: 1. Redistributions of source code must retain the above c” - **Pricing model**: OSS + paid hosting — (verified 2026-07-17) - Quote: “With our core functionality being open, you can use our open-source feature flag and remote config management platform no matter what. Enterprise-level governance and management features are available” - **Starts at**: $45/month — (verified 2026-07-17) - Note: $45/mo billed monthly, or $40/mo if billed annually; this is the cheapest paid cloud tier above Free. - Quote: “Start-Up Feature flags for small teams $ 45 /mo 14 Day Free Trial” - **Platforms**: Web — (verified 2026-07-17) - Note: mainEntity": { "@type": "SoftwareApplication", "name": "Flagsmith", "applicationCategory": "DeveloperApplication", "operatingSystem": "Web, Cloud, Self-Hosted"" — Flagsmith is a web-based SaaS/self-hosted dashboard plus client & server SDKs across many languages; SDKs aren't part of the platforms enum so only Web is recorded. - **Status**: active — (verified 2026-07-17) - Note: pushed_at": "2026-07-17T01:58:15Z", "archived": false" — Repository is not archived and had a commit pushed the same day as this research (2026-07-17); 6,452 stars. - **Open source**: Yes — (verified 2026-07-17) - Quote: “Core functionality—feature flags, remote configuration, user targeting, multivariate flags, and targeting rules—is BSD-3-Clause licensed, free to use in production, and available to inspect, fork, and” - **Self-hostable**: Yes — (verified 2026-07-17) - Quote: “Flagsmith is an open-source feature flag service you can self-host on your premises or in your cloud.” - **Percentage / gradual rollouts**: Yes — (verified 2026-07-17) - Quote: “For example, test a new feature by showing it to 5% of your user base Gradually increase the percentage of users that see the feature based on results” - **User targeting & segments**: Yes — (verified 2026-07-17) - Quote: “Use segments to group users based on a set of rules Control feature flags and remote config for your segments” - **A/B testing / experimentation**: Yes — (verified 2026-07-17) - Note: A/B and multivariate testing (percentage-split variant flags) is a native, paid feature from the Start-Up tier ($45/mo) up; not included on Free. A separate 'Experimentation' add-on with a built-in Ba - Quote: “Everything in Free, plus: ... Scheduled Flags Two-Factor Authentication (2FA) A/B and MVT Testing 3rd Party Integrations” - **Kill switches**: Yes — (verified 2026-07-17) - Quote: “Wrap high-profile features in flags so you can disable buggy code at its source with the flip of a (kill) switch” - **SDKs (server + client)**: Yes — (verified 2026-07-17) - Quote: “Android / Kotlin ... Javascript ... React ... Next.js ... Flutter ... React Native ... iOS / Swift ... Java ... NodeJS ... Python ... .NET ... Ruby ... PHP ... Go ... Rust ... Elixir” - **Local evaluation / edge**: Yes — (verified 2026-07-17) - Quote: “Server Side Local Evaluation Our Server Side SDKs can operate in Local Evaluation Mode. We have ported our Flag Evaluation Engine to every Server Side language SDK that we support. Local Flag Evaluati” - **Audit logs**: Yes — (verified 2026-07-17) - Note: Audit logs ship as part of 'Governance Features' starting on the Scale-Up tier ($300/mo); not included on Free or Start-Up. - Quote: “Everything in Start-Up, plus: ... SAML/SSO Authentication Governance Features – Roles, Permissions, Change Requests, Audit Logs” - **Approval workflows**: Yes — (verified 2026-07-17) - Note: Change Requests (approval workflow) is a full feature, gated to the Scale-Up/Enterprise tiers. - Quote: “Change Requests Prevent accidental changes to critical flags with a built-in approval workflow. Before a flag goes live, another team member must sign off, keeping releases controlled without creating” - **Analytics integration**: Yes — (verified 2026-07-17) - Quote: “You can automate AB tests by connecting the Flagsmith platform with Amplitude. ... Send your Identity flag states into Mixpanel for further downstream analysis. ... Send your Identity flag states into” - **Free tier flag limit**: Yes — (verified 2026-07-17) - Note: Free tier has no cap on the number of feature flags (limit is on monthly API requests, not flag count). - Quote: “Free plan includes: Up to 50,000 Requests Per Month* ... 1 Team Member Unlimited Feature Flags ... Unlimited Environments Unlimited Identities and Segments” - **SSO / SAML**: Yes — (verified 2026-07-17) - Note: SAML/SSO Authentication is available starting on the Scale-Up cloud tier ($300/mo); Enterprise additionally offers LDAP + SCIM. - Quote: “Everything in Start-Up, plus: ... SAML/SSO Authentication Governance Features – Roles, Permissions, Change Requests, Audit Logs” --- Ranked by verified data, never by who paid. https://altcatalog.com/trust/