Flagsmith alternatives

3 tools to consider instead of Flagsmith, shown against it.

Flagsmith Unleash LaunchDarkly Harness Feature Management & Experimentation (formerly Split)
Vendor Flagsmith Unleash LaunchDarkly Harness
Pricing model Free tier + paid plans Free tier + paid plans Subscription Quote only
Free tier Yes Yes Yes —
Deployment Cloud, Self-hosted Cloud, Self-hosted Cloud Cloud
Open source Yes (BSD-3-Clause) Yes (AGPL-3.0) No No
Best for Engineering teams wanting a fully open-source, self-hostable flagging system with light A/B testing. Engineering teams wanting an open-source flagging system with basic rollout experimentation, self-hostable under AGPLv3. Engineering teams that want feature-flag-driven releases with built-in experiment analysis on the same flags. Teams already using or evaluating Harness for delivery pipelines who want flagging and experimentation in the same platform.
Pricing

Free tier up to 50,000 requests/month; Start-Up from $40/month; Scale-Up from $250/month; Enterprise custom.

Free $0/month
Start-Up from $40/month (annual)
Scale-Up from $250/month (annual)
Enterprise custom ("Contact Sales")

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Free self-hosted open source (1 project, 2 environments, 5,000 flags); Pay-As-You-Go cloud is $75/seat/month; Enterprise is custom.

Open Source $0
Pay-As-You-Go $75/seat/month
Enterprise custom

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Free Developer plan with 100K experimentation MAU/month; paid Foundation plan bills per service connection and per 1K client-side MAU; Enterprise is custom.

Developer $0/month
Foundation $10 per service connection/month + $8.33 per 1K client-side MAU/month
Enterprise custom

Prices read from the vendor's own page on September 21, 2026. Vendors change prices; check the source before you budget.

Bundled only in Harness's Enterprise plan; no standalone public pricing.

Checked on the vendor's own page on September 21, 2026: no prices are published. Expect to be quoted.

Features
  • Feature flags and remote configuration
  • User and segment targeting rules, multivariate flags
  • A/B testing on flagged rollouts
  • Open-source core (BSD-3-Clause), self-hostable
  • 2FA and SAML/SSO on higher tiers
  • REST API and SDKs across major platforms
  • Feature flags with targeting rules and gradual rollouts
  • Rollout-based experimentation on flagged traffic
  • 25+ official SDKs
  • Self-hosted (AGPLv3) or managed cloud
  • Multi-region edge and private-instance add-ons
  • Unlimited flags, projects, and experiments on paid plans
  • Feature flags across server, client, and mobile SDKs
  • Progressive rollouts, targeting rules, and kill switches
  • Experimentation with a choice of frequentist or Bayesian analysis
  • Sequential analysis for continuous monitoring
  • Guardian add-on for automatic rollback on regressions
  • Audit logs and RBAC for release governance
  • Feature flags with targeting rules and progressive delivery
  • Built-in impact monitoring against flag rollouts
  • Statistical experimentation on flag-exposed cohorts
  • SDK-based event collection
  • Bundled with Harness CI/CD and delivery platform
  • Alerting on metric regressions during rollout

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