Quick answer
Statsig - Statsig wins for most builders because its free tier is much broader, with far higher event limits, unlimited seats, and extra surfaces like analytics and session replays.
How the free tiers compare
Abby is the narrower tool here: it is built around type-safe feature flags and remote config, with a small free tier that is enough for a few flags, one A/B test, and light traffic. Statsig’s free Developer tier covers more of the product development stack, including experimentation, feature flags, product and web analytics, session replays, and unlimited seats, with much larger usage caps. The difference is not just scale, but scope: Abby is better if you want a compact flags service with simple project pricing and tight limits. Statsig is better if you want one free platform that can carry a real prototype or small product team farther before you pay. Abby’s paid path stays simple and flat until contact sales, while Statsig’s Pro tier starts higher and is more feature-rich.
Abby vs Statsig free tier, side by side
| AbbyFTV 51 | StatsigFTV 71 | |
|---|---|---|
| Events per monthStatsig’s free cap is much higher. | 1,000 | 2 million |
| A/B testsStatsig explicitly includes experimentation, but no free quota is specified. | 1 | Included on free tier |
| Feature flags / remote configsStatsig’s free tier is unlimited for checks, not necessarily for all workflows. | 3 | Unlimited flag and config checks |
| EnvironmentsStatsig input does not provide an environment quota. | 5 | Not specified |
| Session replays per monthOnly Statsig includes replays on the free tier. | Not included | 50,000 |
| SeatsStatsig explicitly includes unlimited seats. | Not specified | Unlimited |
| Analytics retentionStatsig includes retention on the free tier. | Not included | 1 year |
After you outgrow the free tier
Abby uses flat per-project pricing on the paid side, starting at $12/mo for Starter and $89/mo for Startup, then moving to contact sales at Pro and Enterprise. Statsig’s first paid tier is Pro at $150/mo, with a usage-based model on that plan and Enterprise custom pricing. For small teams, Abby is cheaper if you just need flags and can stay within its small quotas. Statsig costs more up front, but it bundles more product surface area before you have to add separate tools.
Cost at real usage
| Usage | Abby | Statsig |
|---|---|---|
| light launch, under free limitsBoth fit within their free tiers. | Free | Free |
| 1 project, needs 10 A/B tests and 10k events/moAbby’s free tier will not fit 10 tests or 10k events. | $89/mo on Startup | Free |
| 1 project, 100k events/moAbby’s Pro plan lists 100,000 events/month but no public price. | Contact sales | Free |
| 5M events/moStatsig Pro includes 5M events; Abby has no public self-serve price at this level. | Contact sales | $150/mo on Pro |
Estimates, not quotes. Usage-based rates change - verify with the vendor's pricing page before committing.
When to pick each one
Pick Abby when…
- You only need feature flags and remote config, not analytics or session replay.
- You are testing a small product with up to 3 flags or configs and 1 A/B test.
- You want simple per-project pricing once you outgrow the free tier.
- You need SSR and SSG-focused SDK support for React or Next.js.
- You are happy with a very small starter limit and plan to upgrade early.
Pick Statsig when…
- You want a free tier that includes experimentation, analytics, and session replay in one place.
- You need unlimited seats for a team without paying first.
- Your app may grow past 1,000 events quickly and you want room to breathe.
- You want to keep working on the free tier while handling real product traffic.
- You prefer a broader product platform rather than a specialized feature-flag service.
Bottom line
For the most common builder case, Statsig is the better free tier because it gives you more room to experiment and measure without paying, and it does so with unlimited seats plus analytics and replays. Abby makes sense when you want a focused feature-flag and remote-config tool and are fine with tight limits. If you expect to stay small and simple, Abby is workable. If you want the free tier to cover more of your product workflow, Statsig is the clearer winner.
Read the full listings: Abby and Statsig. Scores use the FTV methodology at /ftv. Browse more head-to-heads on /compare, or see the top-ranked free tiers on /top.