Best A/B Testing · FREE
Best free A/B Testing (2026)
3 a/b testing that offer a genuine free plan, ranked by entry price. Every figure links to the vendor's own page and the date we captured it.
Key takeaways
- Cheapest: GrowthBook at $0/mo.
- Qualifying: GrowthBook, LaunchDarkly, Statsig.
- Data current through: 2026-06-14.
Comparison
| # | A/B Testing | Entry price | Free | HIPAA | SOC 2 | Best for | Source |
|---|---|---|---|---|---|---|---|
| 1 | GrowthBook | $0/mo | Yes | Yes | Yes | Engineering and data teams wanting warehouse-native experimentation without vendor data lock-in | growthbook.io |
| 2 | LaunchDarkly | $0/mo | Yes | Yes | Yes | AI engineering teams needing runtime control of agent behavior without redeploys | launchdarkly.com |
| 3 | Statsig | $0/mo | Yes | Yes | Yes | Product and engineering teams at scale (OpenAI, Brex, Microsoft, Atlassian, Notion) | statsig.com |