GrowthBook and Statsig both combine feature flags, experimentation, and product analytics on a warehouse-native architecture, and the core capability overlap…
Best for GrowthBook: Teams that want a free, unlimited-user open-source self-hosted option, or that prefer per-seat pricing and want AI-assisted experiment building via GrowthBook's AI Visual Editor and AI Data Analyst.
Best for Statsig: Teams that want session replay bundled in from the free Developer tier, unlimited seats even on paid plans, and a flat monthly baseline rather than per-seat billing — useful for larger teams with many collaborators.
At a Glance
GrowthBook
Statsig
Primary category
Analytics
Analytics
Rating
Not documented
Not documented
Pricing model
Open Source, Freemium (free self-hosted or Starter cloud, paid Pro and Enterprise)
freemium subscription (usage-based)
Starting price
Free (Pro from $40/seat/month)
Free (Developer tier); Pro from $150/month
Free plan
Yes
Yes
Free trial
Not documented
Not documented
Platforms
Web
Web
Team collaboration
Not documented
Not documented
AI features
Yes
Not documented
Public API
Yes
Yes
Key Differences
Pricing structure
GrowthBook: GrowthBook Pro is billed per seat at $40/seat/month for up to 50 users.
Statsig: Statsig Pro is a flat $150/month baseline (covering 5M events) with overages billed per additional event.
Per-seat pricing scales with headcount while flat-plus-overage pricing scales with usage volume — teams with many users but modest event volume, or vice versa, will see very different costs.
Self-hosting
GrowthBook: GrowthBook offers a free open-source self-hosted version with unlimited users, plus a self-hosted Enterprise tier.
Statsig: Statsig's facts don't document a self-hosted or open-source option.
A free self-hosted option removes both per-seat and usage costs entirely for teams willing to operate their own infrastructure.
Session replay
GrowthBook: GrowthBook's facts don't document session replay as a feature.
Statsig: Statsig includes session replay (50,000 replays/month on the free Developer tier, 100,000 on Pro) linked to experiments and feature flags.
Session replay tied to experiment results helps teams see exactly how users experienced a given variant.
Free tier limits
GrowthBook: GrowthBook's free Starter plan covers up to 3 users with unlimited feature flags and experiments.
Statsig: Statsig's free Developer tier covers unlimited seats with 2M events/month and unlimited flag/config checks.
GrowthBook's free tier caps by user count while Statsig's caps by event volume, so the right free tier depends on team size versus traffic volume.
AI tooling
GrowthBook: GrowthBook includes an AI Visual Editor for building experiments and an AI Data Analyst for querying product analytics data.
AI-assisted experiment building and querying can reduce the technical lift needed to design tests or explore data.
Feature-by-Feature
Experimentation & Flags
Feature
GrowthBook
Statsig
A/B testing
Available
Available
Feature flags
Available
Available
Warehouse-native architecture
Available
Available
Multi-arm bandits
Available
Not documented
Analytics & Replay
Feature
GrowthBook
Statsig
Product analytics
Available
Available
Session replay
Not documented
Available
AI-assisted analytics/authoring
Available
Not documented
Pricing & Hosting
Feature
GrowthBook
Statsig
Free self-hosted open-source version
Available
Not documented
Free cloud tier
Available
Available
SSO/SCIM (Enterprise)
Available
Available
Pricing Compared
Starting price reflects the lowest paid tier, not the full cost for every team size or usage level.
GrowthBook
Starter (Cloud) — Free Monthly
Pro (Cloud) — $40/seat/month Monthly
Enterprise (Cloud) — Custom Custom
Open Source (Self-Hosted) — Free N/A
Enterprise (Self-Hosted) — Custom Custom
Statsig
Developer — $0/month monthly
Pro — $150/month monthly
Enterprise — Custom custom
Pros & Cons
GrowthBook
Pros
Genuinely open source MIT-licensed core with a free, fully functional self-hosting option, not just a limited trial.
Warehouse-native design avoids duplicating event data into a separate proprietary analytics store, reducing vendor lock-in.
Combines feature flags, experimentation, and product analytics in one tool instead of three separate point solutions.
Free tiers exist on both the cloud and self-hosted paths, lowering the barrier to trying the full statistics engine.
Backed by a large and active GitHub community with thousands of stars and thousands of reported companies using the platform.
Cons
The warehouse-native model requires a company to already have a modern data warehouse set up, which can be a barrier for smaller teams without one.
Self-hosting requires engineering resources to deploy, maintain, and upgrade the platform over time.
Advanced features like SSO, SCIM, and audit logs are gated behind Enterprise pricing that requires a custom quote rather than being self-serve.
Pro plan is priced per seat, which can get expensive quickly for larger product and engineering organizations.
As a warehouse-dependent tool, real-time experiment results can be slower than platforms that use a dedicated, purpose-built event pipeline.
Statsig
Pros
Generous free Developer tier with unlimited flag checks and unlimited seats
Combines feature flags, experimentation, and analytics in one platform instead of separate tools
Backed by rapid growth and, since 2025, OpenAI's resources following its acquisition
Advanced experimentation and analytics on paid tiers support rigorous statistical testing
Session replay is included even on the free tier
Cons
Event-based pricing on Pro can grow with product usage, adding cost as event volume increases
Enterprise-grade capabilities like warehouse-native deployment and SSO require a custom contract
Recent OpenAI acquisition (2025) may bring product direction changes for existing customers
Advanced analytics retention and change review workflows are gated behind paid tiers
Use Cases
Choose GrowthBook: Teams that want a free, unlimited-user open-source self-hosted option, or that prefer per-seat pricing and want AI-assisted experiment building via GrowthBook's AI Visual Editor and AI Data Analyst.
Choose Statsig: Teams that want session replay bundled in from the free Developer tier, unlimited seats even on paid plans, and a flat monthly baseline rather than per-seat billing — useful for larger teams with many collaborators.
Need both: Organizations evaluating experimentation platforms during a migration, or that want deeper session-replay-linked analysis alongside their existing flagging setup, might pilot both since session replay is a native Statsig feature not documented for GrowthBook.
GrowthBook
Gradual feature rollouts — Engineering teams use GrowthBook's feature flags to release new functionality to a subset of users, monitor for issues, and roll back instantly without a redeploy.
Warehouse-native A/B testing — Product and data teams run A/B tests and multi-armed bandit experiments directly against their existing data warehouse without duplicating event data into a separate system.
Self-hosted experimentation for cost control — Startups and engineering-led companies self-host GrowthBook's open source edition to run unlimited feature flags and experiments without paying per-seat SaaS fees.
Statsig
Safe feature rollouts — Engineering teams use Statsig's feature flags to gradually roll out new features and instantly roll them back if issues arise.
Product experimentation and A/B testing — Product teams run A/B tests and more advanced experiments through Statsig to measure the impact of changes before a full rollout.
Unified product analytics and experiment impact analysis — Teams use Statsig's integrated analytics to see how feature flags and experiments affect real product usage metrics in one place.
Frequently Asked Questions
Is GrowthBook or Statsig free?
Both offer free tiers: GrowthBook's Starter plan is free for up to 3 users (plus a fully free open-source self-hosted version), and Statsig's Developer tier is free with 2M events/month and unlimited seats.
Which tool includes session replay?
Statsig includes session replay linked to experiments and feature flags; this isn't documented as a GrowthBook feature.
Can GrowthBook be self-hosted for free?
Yes, GrowthBook offers a free open-source self-hosted version with unlimited users, in addition to its cloud plans.
How is Pro pricing structured for each?
GrowthBook Pro is $40 per seat per month for up to 50 users; Statsig Pro is a flat $150/month baseline covering 5M events, with additional events billed at $0.05 per 1,000.
Which companies use these platforms?
GrowthBook cites 3,000+ companies as users; Statsig cites customers including OpenAI, Brex, and Notion.