FeatBit
Best for self-hosting
Why teams pick it
Self-host anywhere with Docker, Kubernetes, or Helm for full data control
Open-source alternatives to LaunchDarkly
Compare community-driven replacements for LaunchDarkly in feature flags workflows. We curate active, self-hostable options with transparent licensing so you can evaluate the right fit quickly.
LaunchDarkly
LaunchDarkly enables feature flag management with real-time targeting, A/B testing, and gradual rollouts. Provides safe deployment controls, experimentation platform, and operational insights for software teams.Read more
Key stats
- 16Alternatives
- 8Support self-hosting
Run on infrastructure you control
- 15Active development
Recent commits in the last 6 months
- 13Permissive licenses
MIT, Apache, and similar licenses
Counts reflect projects currently indexed as alternatives to LaunchDarkly.
Start with these picks
These projects match the most common migration paths for teams replacing LaunchDarkly.
Unleash
Privacy-first alternative
Why teams pick it
Organizations needing GDPR‑compliant, privacy‑first flagging
All open-source alternatives
Unleash
Feature flag platform enabling safe, incremental releases
Active developmentPermissive licensePrivacy-firstTypeScript
Why teams choose it
- API‑first flag management with full automation
- 15+ official SDKs covering major languages
- Granular activation strategies (canary, kill‑switch, A/B testing)
Watch for
Open‑source version requires own infrastructure to run
Migration highlight
Canary release of a new UI
Expose the UI to a small user segment, monitor performance, and roll back instantly if issues arise.
Flipper
Beautiful, performant feature flags for Ruby and Rails
Active developmentPermissive licenseFast to deployRuby
Why teams choose it
- Enable features for everyone, specific actors, groups, percentages of actors, or percentages of time
- Works with Active Record, Redis, Memcached, Mongo, and other storage adapters
- Includes web UI and console access for runtime configuration
Watch for
Advanced features like audit history and permissions require paid Cloud subscription
Migration highlight
Gradual Feature Rollout
Enable a new search feature for 2% of users, monitor performance, then gradually increase to 100% without redeploying.
Togglz
Dynamic runtime feature toggles for Java applications
Active developmentPermissive licenseIntegration-friendlyJava
Why teams choose it
- Runtime toggling of features without redeploying
- Per-user, group, or environment activation strategies
- Extensible storage backends (in‑memory, JDBC, etc.)
Watch for
Limited to JVM languages; not applicable to non‑Java stacks
Migration highlight
Gradual rollout to 10% of users
Enable a new UI component for a subset of users, monitor performance, then increase exposure without redeploying.
FeatBit
Self-hosted feature flag platform for safe deployments
Self-host friendlyActive developmentPermissive licenseC#
Why teams choose it
- Self-host anywhere with Docker, Kubernetes, or Helm for full data control
- Progressive rollouts and instant rollback without redeployment
- Reusable user segments and targeted feature releases
Watch for
Self-hosting requires infrastructure management and maintenance
Migration highlight
Progressive Feature Rollout
Release new algorithms to 1% of users, monitor performance, then expand gradually to mitigate risk and enable instant rollback without redeployment
Flagsmith
Open-Source Feature Flagging and Remote Config Platform
Self-host friendlyActive developmentPermissive licensePython
Why teams choose it
- Feature flags with remote toggling—no code deployments required
- User segmentation and A/B testing for targeted rollouts
- 15+ SDKs for popular languages and frameworks
Watch for
Enterprise governance features require a commercial license
Migration highlight
Progressive Feature Rollout
Release new features to 10% of users, monitor performance, and gradually expand to 100% without redeployment
Flipt
Git-native feature management platform for modern development teams
Self-host friendlyActive developmentPrivacy-firstGo
Why teams choose it
- Store feature flags in Git repositories with full version control and blame history
- Multi-environment support via Git branches, directories, or separate repositories
- Zero-dependency deployment as a single binary with no database required
Watch for
Git-native approach requires teams comfortable with Git-based workflows
Migration highlight
Trunk-Based Development with Feature Flags
Merge incomplete features to main branch behind flags, enabling continuous integration without blocking releases or requiring long-lived feature branches
Flagr
Deliver targeted experiences with feature flags and A/B testing
Self-host friendlyActive developmentPermissive licenseGo
Why teams choose it
- Feature flag management with real-time evaluation
- Built-in A/B testing and experiment tracking
- Dynamic configuration via Swagger REST API
Watch for
Requires self-hosting and operational overhead
Migration highlight
Gradual rollout of new UI component
Enable the component for a subset of users, measure conversion, and roll back instantly if needed.
GO Feature Flag
Lightweight, multi-language feature flag service with relay proxy
Self-host friendlyActive developmentPermissive licenseGo
Why teams choose it
- Supports multiple flag storage backends (HTTP, S3, Kubernetes, etc.)
- Configuration in JSON, TOML, or YAML formats
- Complex rollout strategies: percentage, A/B testing, scheduling
Watch for
Cross-language usage requires running a separate relay proxy
Migration highlight
Gradual rollout of a new API endpoint
20% of users receive the new endpoint, allowing safe validation before full release
Bucketeer
Feature flag management and A/B testing platform
Active developmentPermissive licenseIntegration-friendlyGo
Why teams choose it
- Feature flags with dark launch and staged rollout capabilities based on user segments
- Bayesian A/B testing for faster experimentation with smaller sample sizes
- Trunk-based development support to reduce merge conflicts and accelerate releases
Watch for
Documentation is still a work in progress
Migration highlight
Progressive Feature Rollout
Deploy new features to production behind flags, then gradually release to user segments while monitoring performance and rolling back instantly if issues arise.
Split
Rack‑based A/B testing framework for Rails, Sinatra, and more
Active developmentPermissive licenseIntegration-friendlyRuby
Why teams choose it
- Rack‑compatible, works with Rails, Sinatra, or any Rack app
- Redis‑backed storage with support for Redis 4+
- Weighted alternatives and URL‑based overrides for fine‑grained control
Watch for
Requires a Redis server
Migration highlight
Landing page button color test
Identify which button image drives higher click‑through rates
FeatureHub
Cloud Native feature flags, A/B testing, and remote configuration platform
Self-host friendlyActive developmentPrivacy-firstDart
Why teams choose it
- Unlimited users, features, applications, and environments with cloud-native scalability
- A/B testing with percentage rollouts and multi-attribute targeting strategies
- Native analytics integration and webhook support for real-time feature updates
Watch for
SaaS offering requires 30-day trial evaluation before commitment
Migration highlight
Progressive Feature Rollout
Release new features to 10% of users, monitor analytics, then gradually increase exposure while maintaining rollback capability through the admin console.
FeatureProbe
Open source feature management for confident, low-risk deployments
Self-host friendlyPermissive licensePrivacy-firstTypeScript
Why teams choose it
- Feature toggles with progressive rollout and instant rollback via UI
- Built-in A/B testing with metric analysis and traffic monitoring
- Multi-language SDK support: 11+ server and client-side libraries
Watch for
Documentation primarily targets teams already familiar with feature management concepts
Migration highlight
Trunk-based development without branch chaos
Development teams merge to main continuously, using feature toggles to gate incomplete work and eliminate costly branch-merge cycles.
Rollout
Redis-backed feature flags for Ruby with granular rollout control
Active developmentPermissive licenseAI-powered workflowsRuby
Why teams choose it
- Percentage-based gradual rollouts with consistent user hashing (CRC32)
- Custom group definitions with arbitrary Ruby logic for targeting
- Individual user activation for beta testing and VIP access
Watch for
Requires Redis infrastructure and operational knowledge
Migration highlight
Phased Feature Launch
Roll out new chat functionality to 5% of users, monitor error rates, then gradually increase to 20%, 50%, and 100% based on performance metrics.
Featurevisor
Git-based feature flags and experimentation for developers
Active developmentPermissive licenseIntegration-friendlyTypeScript
Why teams choose it
- Declarative YAML definitions in Git with full version control and code review
- Static JSON datafiles served from your CDN—no runtime vendor dependencies
- Consistent bucketing across devices and sessions for reliable experimentation
Watch for
Requires CI/CD pipeline setup and CDN configuration
Migration highlight
Gradual Feature Rollout
Deploy a new checkout flow to 10% of users, monitor metrics, then ramp to 100% over two weeks—all via pull requests and automated datafile builds.
Flagger
Progressive delivery automation for Kubernetes with canary deployments
Active developmentPermissive licenseIntegration-friendlyGo
Why teams choose it
- Automated canary, A/B testing, and blue/green deployment strategies with gradual traffic shifting
- Built-in metrics analysis with Prometheus integration and custom metric template support
- Webhook-driven conformance and load testing during rollout with automatic rollback on failure
Watch for
Requires Kubernetes and familiarity with service mesh or ingress controller concepts
Migration highlight
Canary Deployment with Automated Rollback
Gradually shift 5% traffic increments to a new version, automatically rolling back if request success rate drops below 99% or latency exceeds thresholds
GrowthBook
Open Source Feature Flagging and A/B Testing Platform
Self-host friendlyActive developmentPrivacy-firstTypeScript
Why teams choose it
- Advanced A/B test statistics: CUPED, sequential testing, Bayesian analysis, and SRM checks
- Native integrations with BigQuery, Redshift, Snowflake, Mixpanel, and Google Analytics
- Feature flags with gradual rollouts, advanced targeting, and experiment capabilities
Watch for
Self-hosting requires Docker and MongoDB infrastructure management
Migration highlight
Gradual Feature Rollout
Release new features to 5% of users, monitor metrics in real-time, and scale to 100% with confidence using built-in targeting rules.
Choosing a feature flags alternative
Teams replacing LaunchDarkly in feature flags workflows typically weigh self-hosting needs, integration coverage, and licensing obligations.
- 8 projects let you self-host and keep customer data on infrastructure you control.
- 15 options are actively maintained with recent commits.
Tip: shortlist one hosted and one self-hosted option so stakeholders can compare trade-offs before migrating away from LaunchDarkly.