Split vs AB Tasty
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 tierQuote on request
Quote onlyWhat drives the bill
The metric that actually scales your invoice.
Paid tiers are quote-based, priced by monthly tracked keys.
Quote-based annual contracts priced by traffic volume, now sold as part of the merged Wingify platform.
Free tier
Free tier with limited monthly tracked keys.
No free tier; demo on request.
Open source
Self-hostable
No-code authoring
Languages
Platforms
Fits teams
Adoption
Established
Harness · since 2015
Established
Wingify (VWO + AB Tasty) · since 2009
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.
- EU hosting and GDPR posture simplify European procurement.
- Good balance between marketer-friendly editing and server-side flags.
- Strong support reputation in European markets.
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.
- Less well known outside Europe, with a smaller partner ecosystem.
- Quote-based pricing with no self-serve entry.
- Statistics engine is less differentiated than the warehouse-native platforms.
Best for
Teams that want every release measured, not just deliberate experiments.
European e-commerce and media companies with GDPR-driven vendor requirements.
All of these integrate with: Segment, Slack.
Pricing last reviewed August 2026 and is indicative only — confirm on each vendor’s own page.