What's the best feature flag platform for gradual rollouts across web and mobile apps?

If your main goal is gradual rollouts across both web and mobile, the “best” platform usually depends on whether you want speed/ease, enterprise controls, or open-source/self-hosted flexibility.

Top picks

1. LaunchDarkly — best overall for mature gradual rollouts

• Very strong targeting, percentage rollouts, kill switches, experiments
• Excellent SDK coverage for web, iOS, Android, backend
• Reliable at scale, good audit/compliance story
• Best if you want the safest, most established option

2. Statsig — best value if you also want experimentation/analytics

• Great for feature flags plus A/B testing and product analytics
• Strong rollout controls and mobile/web support
• Often cheaper/more product-analytics oriented than LaunchDarkly
• Best if you want flags and experiments in one place

3. CloudBees Feature Management / Unleash — best for self-hosted or more control

• Unleash is popular open-source, good gradual rollout support
• Better if you need to host yourself or want lower vendor lock-in
• More operational work than managed SaaS

My recommendation

• Choose LaunchDarkly if you want the most proven, polished rollout platform.
• Choose Statsig if you want strong rollouts and experimentation/product analytics.
• Choose Unleash if you need self-hosting or open-source.

What to look for specifically

For web + mobile gradual rollouts, make sure the platform supports:

• Percentage-based rollouts
• User/device targeting
• Stable bucketing across sessions/devices
• Offline caching / local fallback for mobile
• Kill switches
• SDKs for iOS, Android, React Native/Flutter if relevant
• Environment separation (dev/staging/prod)
• Audit logs and RBAC

If you want, I can give you a side-by-side comparison table for LaunchDarkly vs Statsig vs Unleash based on your stack (e.g. React web + iOS/Android + backend).