Split vs VWO
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.
Paid tiers are quote-based, priced by monthly tracked keys.
Priced by monthly tracked users across modules, so buying testing plus insights raises the total substantially. The Wingify rebrand has moved pricing behind Growth/Pro/Enterprise tiers without published figures — get a quote rather than relying on an old VWO list price.
Free tier
Free tier with limited monthly tracked keys.
Free starter plan with limited monthly tracked users.
Open source
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Established
Harness · since 2015
Widely used
Wingify (VWO + AB Tasty) · since 2010
Strengths
- 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.
Limitations
- 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.
Best for
Teams that want every release measured, not just deliberate experiments.
Conversion-optimisation teams that want testing and behavioural insight from one vendor.
All of these integrate with: Segment, Slack.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.