Feature checklists rarely decide anything. What decides it is the pricing metric, who has to write the tests, and which limitation you can live with.
Entry price
Free tier available
Free tierFree tier available
Free tierWhat drives the bill
The metric that actually scales your invoice.
One of the most generous free tiers in developer tooling; paid usage is billed on analytics events, not seats.
Paid tiers are quote-based, priced by monthly tracked keys.
Free tier
Generous free tier including unlimited feature flags and a large monthly event allowance.
Free tier with limited monthly tracked keys.
Open source
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Widely used
Statsig (OpenAI) · since 2020
Established
Harness · since 2015
Strengths
Limitations
Best for
Product teams that want experimentation and analytics to share one source of truth.
Teams that want every release measured, not just deliberate experiments.
All of these integrate with: Snowflake, Segment, Slack, Datadog.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.