About 20; min
LaunchDarkly invented feature flags as a service. Split.io and Statsig entered as competitors with different pricing approaches. And now open-source options like Unleash and PostHog feature flags offer the same capability at a fraction of the cost — or free.
Feature flags are one of those tools where pricing varies by 100x between providers. Here’s what each one costs in 2026.
Quick Pricing Comparison
| Tool | Free Tier | Paid Starting At | Pricing Model |
|---|---|---|---|
| LaunchDarkly | 14-day trial | $10/seat/mo (Pro) | Per seat + MAU-based |
| Split.io | Up to 10 seats | Custom (~$500+/mo) | Per seat + MTK |
| Statsig | Free (unlimited flags) | $150/mo (Pro) | Event-based |
| PostHog | 1M flag requests/mo | Usage-based | Per request |
| Unleash | Free (self-hosted, unlimited) | $80/mo (Pro cloud) | Flat + seats |
| Flagsmith | Free (self-hosted) | $45/mo (cloud) | Flat + seats + requests |
LaunchDarkly: The Enterprise Standard
LaunchDarkly’s Pro plan starts at $10/seat/month, which sounds reasonable. But the real cost driver is MAU (Monthly Active Users) — how many unique users evaluate feature flags. Pro includes 1M client-side MAUs. Above that, overages apply.
For a SaaS with 500K MAU and 10 engineering seats: $100/month (seats) + MAU within limits = ~$100/month total. For a consumer app with 5M MAU: $100 (seats) + significant MAU overages = $500–$2,000+/month depending on contract.
LaunchDarkly’s Strengths
- Reliability: 99.99%+ uptime with edge CDN for flag evaluation. Flags still work if LaunchDarkly’s API is down (local caching)
- SDK coverage: 25+ official SDKs covering every language and platform
- Targeting: The most advanced targeting rules — user attributes, segments, percentage rollouts, multivariate flags
- Experimentation: Built-in A/B testing tied to feature flags (Enterprise only)
- Enterprise maturity: Used by thousands of companies, SOC2 and HIPAA compliant
Statsig: Free Flags + Built-in Experiments
Statsig’s free tier is remarkably generous: unlimited feature flags AND unlimited A/B experiments at $0 for up to 1M events/month. LaunchDarkly charges Enterprise pricing for experiments. Statsig gives them away free.
The catch: Statsig’s event-based pricing means costs scale with how much data you send, not how many users evaluate flags. A feature flag that fires an event on every evaluation at 10M evaluations/month would exceed the free tier quickly. But if you’re strategic about which events you track, the free tier covers most growing startups.
PostHog Feature Flags
PostHog bundles feature flags with product analytics, session replay, and A/B testing in one platform. 1M flag requests/month free, then $0.0001 per additional request. At 10M monthly requests: $0.90/month in overage. At 100M: $9.90/month. This is orders of magnitude cheaper than LaunchDarkly.
The trade-off: PostHog’s feature flag SDK coverage is narrower (JavaScript, Python, Ruby, Go, PHP, React Native). LaunchDarkly supports 25+ platforms including iOS native, Android native, C++, Lua, and embedded systems.
Open-Source: Unleash and Flagsmith
Both Unleash and Flagsmith are fully functional self-hosted at $0 with no feature limits. Unleash has a larger community and more integrations. Flagsmith includes remote config (dynamic configuration values, not just boolean flags) that Unleash doesn’t offer natively.
Cost Comparison: 10 Engineering Seats
| Tool | 5M Flag Requests/mo | 50M Flag Requests/mo |
|---|---|---|
| LaunchDarkly Pro | $100/mo (within MAU limits) | $500–$2,000/mo (MAU overages) |
| Split.io | ~$500+/mo (custom) | ~$2,000+/mo (custom) |
| Statsig Free | $0 (within event limits) | $150/mo (Pro) |
| PostHog | $0.40/mo | $4.90/mo |
| Unleash Cloud Pro | $80/mo | $80/mo (flat) |
| Unleash Self-Hosted | $0 + hosting (~$20) | $0 + hosting (~$50) |
| Flagsmith Cloud | $45/mo | Custom |
| Flagsmith Self-Hosted | $0 + hosting | $0 + hosting |
The cost range is staggering. PostHog at $4.90/month for 50M flag requests vs LaunchDarkly at $500–$2,000 for the same volume. That’s up to a 400x price difference for the same core functionality.
Feature Comparison
| Feature | LaunchDarkly | Statsig | PostHog | Unleash |
|---|---|---|---|---|
| Feature flags | Best | Excellent | Good | Good |
| A/B experiments | Enterprise only | Free (all plans) | Included | Basic |
| SDK coverage | 25+ (best) | 10+ | 8+ | 15+ |
| Targeting complexity | Best | Good | Good | Good |
| Edge evaluation | Yes (CDN-backed) | Yes | No (server-side) | Yes (Edge SDK) |
| Approval workflows | Enterprise | Pro | No | Pro |
| Self-hosting | No | No | Yes | Yes |
| Open source | No | No | Yes | Yes |
| Analytics bundled | No | Yes (experiments) | Yes (full product analytics) | No |
| Compliance | SOC2, HIPAA, FedRAMP | SOC2 | SOC2 | SOC2 (Pro) |
Who Should Pick What
Pick LaunchDarkly If:
- You need the most reliable flag evaluation with edge CDN and local caching
- Your team uses niche platforms (C++, Lua, embedded) that only LaunchDarkly’s SDKs cover
- Regulatory compliance (HIPAA, FedRAMP) is a hard requirement
- Approval workflows for flag changes are needed in your release process
- Budget isn’t the primary concern and you want the most battle-tested platform
Pick Statsig If:
- You want feature flags AND A/B experiments for free
- Experiment-driven development is central to your product culture
- Your flag request volume is under 1M events/month (free tier covers you)
- You prefer one tool for flags + experiments instead of separate platforms
Pick PostHog If:
- You already use PostHog for analytics or session replay
- Cost is critical — $5/month for 50M flag requests is absurdly cheap
- You want flags + analytics + replay + experiments in one open-source platform
- Self-hosting is an option for your team
Pick Unleash/Flagsmith If:
- Self-hosting at $0 is your target (unlimited flags, no vendor dependency)
- Your team has DevOps capacity to manage the deployment
- Data sovereignty requires flags to run on your infrastructure
- You want open-source with a strong community behind it
Best enterprise reliability: LaunchDarkly — the most SDKs, best edge evaluation, and strongest compliance certifications. Worth the premium for teams where flag reliability is mission-critical.
Best free offering: Statsig — unlimited flags AND experiments at $0. The best deal in feature management for startups.
Best value at scale: PostHog — $5/month for 50M flag requests plus analytics, replay, and experiments bundled. Up to 400x cheaper than LaunchDarkly.
Best self-hosted: Unleash — the most mature open-source feature flag platform with 15+ SDKs and active community.
FAQ
Do I really need a feature flag service?
If you deploy more than once a week and want to decouple deployment from release, yes. Feature flags let you push code to production without exposing features to users until you’re ready. For continuous deployment workflows, they’re essential.
Can I build my own feature flags?
A simple if/else with a config value takes 10 minutes. But managing flags at scale (targeting rules, percentage rollouts, audit logs, SDK consistency across platforms) takes months of engineering. Use a service or open-source tool instead of building from scratch.
What’s the difference between feature flags and remote config?
Feature flags are typically boolean (on/off) or multivariate (A/B/C). Remote config stores any key-value pair (strings, numbers, JSON). Most feature flag tools support both. Flagsmith explicitly markets remote config as a core feature alongside flags.
How many feature flags should a team have active?
Most teams maintain 20–50 active flags at any time. Long-lived flags (kill switches, permission flags) stay permanent. Short-lived flags (feature rollouts) should be removed within 2–4 weeks after full rollout. Stale flags create tech debt — clean them up regularly.
