Split vs VWO

Free tier available

From $314 per month (indicative, growth tier by traffic)

Paid tiers are quote-based, priced by monthly tracked keys.

Priced by monthly tracked users across modules; buying testing plus insights raises the total substantially.

Free tier with limited monthly tracked keys.

Free starter plan with limited monthly tracked users.

Established

Harness · since 2015

Widely used

Wingify · since 2010

• Automatic metric impact on every flag catches regressions nobody thought to measure.
• Guardrail alerts stop a bad rollout before it reaches everyone.
• Strong data-platform integrations.

• Observation and experimentation in one place shortens the hypothesis loop.
• Visual editor is capable and marketer-friendly.
• Cheaper than Optimizely at comparable traffic.

• Post-acquisition roadmap now sits inside Harness's broader platform strategy.
• Requires meaningful event instrumentation before the impact analysis is useful.
• Opaque enterprise pricing.

• Module-based pricing means the useful configuration costs much more than the headline.
• Client-side flicker on complex single-page applications.
• Server-side capability lags the flag-first platforms.

Teams that want every release measured, not just deliberate experiments.

Conversion-optimisation teams that want testing and behavioural insight from one vendor.