ABTestly gives you more for your budget.

Heatmaps: experiment heatmaps are part of Pro and Business at no extra cost rather than a separate line item, covering the pages your tests run on. The Signals add on reads that behaviour as evidence when it writes hypotheses, and brings heatmaps to Starter, where they are not otherwise included.

Prices at the 100,000 tracked user tier, annual billing, checked 6 September 2026 on vwo.com/pricing, convert.com/pricing and optimizely.com/plans. ABTestly Pro annual is $199 and Convert Growth annual is $299. Convert's page opens on the annual toggle, so $299 is the first number you see there rather than its $399 monthly rate. VWO publishes no price at any volume, in any currency, so ask VWO for a quote; Optimizely is custom.

Two things the table above does not show. VWO runs a 30 day trial that starts without payment details, which is a longer and looser evaluation than our 14 days with a card. And VWO and AB Tasty are now one company, so a shortlist holding both is one vendor rather than two.

Capabilities checked August 2026. Edge execution: VWO, Convert, and Optimizely each offer it through a separate edge or full stack SDK (Optimizely Performance Edge on Cloudflare Workers, VWO FME edge SDK, Convert Full Stack SDK), while ABTestly serves per version config from the edge in its standard snippet. Snippet size: Convert documents about 60 KB; VWO and Optimizely do not publish a comparable figure, and an Optimizely edge microsnippet can be smaller. Ledger: Optimizely documents its results as complete rather than estimated while its event export is preprocessed rather than a raw event ledger; VWO and Convert do not publish how their result data is aggregated, and both offer raw data exports.