Open-source feature flag and remote config
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37 reviews trackedThe Bottom Line
Entry price
Free plan available, paid tiers above
Biggest pro
Open-source core with a generous free tier of 50K requests/month
Biggest con
Free tier limited to 1 team member, impractical for even small teams
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
Pricing: Free plan available
Best for: Growing teams
4.8/5 across review platforms
What is Flagsmith?
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. Flagsmith tracks every flag change in an audit log for easy rollback and supports user trait storage for targeting. Deployment options include SaaS cloud across eight regions, private cloud in your own infrastructure, on-premises with Kubernetes or OpenShift, or fully self-hosted from the open-source repository. SDKs cover React, Node, Python, Go, Ruby, .NET, iOS, Android, Flutter, Rust, PHP, and a REST API.
Available on: Web
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
4.8(37 reviews)
Ratings aggregated from independent review platforms. Learn more
Key Features
Feature flags with instant toggle, no redeploy requiredRemote configuration to change app behavior in real timeUser segmentation and trait-based targetingPercentage-based canary and staged rolloutsMultivariate flags for A/B/n testing and experimentationFull audit log with change tracking and rollbackScheduled flags for timed feature releasesSDKs for 12+ languages including React, Python, Go, and FlutterSelf-hosted, private cloud, and SaaS deployment optionsThird-party integrations with analytics and monitoring tools
Pricing Plans
Pricing checked Jul 7, 2026
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
Reviews
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4.8/5
Across 37 verified user reviews on G2
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Flagsmith FAQ
How does Flagsmith support A/B testing?
Flagsmith includes built-in A/B testing capabilities, allowing teams to run multivariate tests directly within the platform. It integrates with analytics tools to help evaluate test results and inform feature rollout decisions. This eliminates the need for separate tooling for A/B testing.
Which teams benefit most from Flagsmith?
Development teams, QA teams, and operations teams can all benefit from Flagsmith. Its feature flagging and remote configuration capabilities are particularly useful for those needing to manage feature releases, test in production, and deploy applications across various environments.
How is Flagsmith priced?
Flagsmith offers a free tier for basic usage, and paid plans are available for organizations requiring higher request volumes, more team members, and advanced features. Overage pricing applies for requests exceeding plan limits. Enterprise features like SAML/SSO require custom pricing.
What kind of deployment options does Flagsmith offer?
Flagsmith provides flexible deployment options including a SaaS cloud service across eight regions, private cloud deployment within a user's own infrastructure, and on-premises installation using Kubernetes or OpenShift. Users can also fully self-host the open-source repository.
Can Flagsmith be used to manage features for different user groups?
Yes, Flagsmith allows for precise per-user targeting through segmentation and user trait storage. This enables teams to roll out features to specific user segments or percentages, ensuring controlled and targeted releases.
What are the trade-offs of using Flagsmith's free tier?
The free tier of Flagsmith is limited to one team member, which can be impractical for even small development teams. Additionally, the Start-Up plan caps at three team members and one million requests per month, and overage pricing can accumulate at higher scales.
How does Flagsmith compare to LaunchDarkly?
Flagsmith offers an open-source core and flexible deployment options including self-hosting, which differentiates it from proprietary solutions like LaunchDarkly. Both platforms provide feature flagging and remote configuration, but Flagsmith's open-source nature allows for greater transparency and control over the underlying infrastructure.
Source: flagsmith.com