Open-source feature flag and remote config
Visit WebsiteWhat is Flagsmith?
Flagsmith is a a/b testing tool. Flagsmith is an open-source feature flag and remote configuration service for web, mobile, and server-side applications. It lets teams toggle features on or off without redeploying, roll out changes to specific user segments or percentages, and run multivariate A/B tests with analytics integrations. Key capabilities: Feature flags with instant toggle — no redeploy required, Remote configuration to change app behavior in real time, User segmentation and trait-based targeting, Percentage-based canary and staged rollouts, Multivariate flags for A/B/n testing and experimentation. Flagsmith ships a free plan plus paid tiers that unlock as usage grows. Buyers most often compare Flagsmith against LaunchDarkly, ConfigCat, GrowthBook.
TL;DR - Flagsmith
- Open-source feature flag platform with remote config, segmentation, and built-in A/B testing
- Deploy as SaaS, private cloud, on-prem, or self-hosted with SDKs for 12+ languages
- Free tier includes 50K requests/month; paid plans start at $40/month with up to 1M requests
Pros & Cons
Pros
- Open-source core with a generous free tier of 50K requests/month
- Flexible deployment: SaaS, private cloud, on-prem, or fully self-hosted
- Broad SDK coverage across all major platforms and languages
- Built-in A/B testing with analytics integrations avoids separate tooling
- Audit log and change tracking make compliance and rollback straightforward
- Segmentation and trait storage enable precise per-user targeting
Cons
- Free tier limited to 1 team member — impractical for even small teams
- Start-Up plan caps at 3 team members and 1M requests/month
- Overage pricing at $50 per million requests can add up at scale
- Enterprise features like SAML/SSO and approval workflows require custom pricing
- Self-hosted deployment demands Kubernetes expertise and ongoing maintenance
Ratings Across the Web
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Key Features
Pricing Plans
Free
$0/month
- Up to 50,000 API requests/month
- 1 team member
- Unlimited feature flags
- Unlimited environments and identities
- Segments and 3rd-party integrations
- A/B testing and API access
Start-Up
$40/month (annual) or $45/month (monthly)
- Up to 1,000,000 API requests/month
- 3 team members
- Unlimited projects
- Email support
- Scheduled flags
- Two-factor authentication
- 14-day free trial
Enterprise
Custom
- 5,000,000+ API requests/month
- 20+ team members
- Roles, permissions, and change requests
- SAML, Okta, ADFS, LDAP authentication
- On-premise or private cloud deployment
- Onboarding, training, and enterprise SLA
- Priority real-time chat and Discord support
About Flagsmith
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Flagsmith FAQ
Is Flagsmith open source?
What is the difference between feature flags and remote config in Flagsmith?
How does Flagsmith pricing work for overages?
Can I self-host Flagsmith?
Does Flagsmith support A/B testing?
Which SDKs does Flagsmith provide?
Source: flagsmith.com