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Varify.io vs. the market:A/B testing tools compared

AB Tasty, Convert, Optimizely and VWO side by side with Varify — on G2 ratings and the features that actually differ.

15-day trial, no credit card, no setup fees.

Over 2,700 teams rely on Varify.

G2 Momentum Leader Fall 2026 G2 High Performer Fall 2026 G2 Best Usability Small Business Fall 2026 G2 Best Results Small Business Fall 2026 G2 Regional Leader Europe Small Business Fall 2026

What only Varify combines

  • ✓Flat price per domain available
  • ✓Evaluation in your own analytics possible
  • ✓Company and hosting in Germany
  • ✓Cookieless — no cookies, no personal data

Five tools on G2

Reviews from verified users, taken from the G2 comparison report Fall 2026.

G2
VarifyAB TastyConvertOptimizelyVWO
Reviews5741398411929
Likelihood to recommend97%89%93%85%87%
Meets requirements93%85%90%84%85%
Quality of support98%92%92%80%90%
Ease of use93%85%87%82%84%
Ease of setup95%83%89%80%86%
Ease of admin94%89%92%82%87%
Good partner in doing business98%91%94%79%89%
Product direction100%92%94%81%91%
Share of positive answers. Source: G2 comparison report Fall 2026, category A/B testing, reviews collected through 2 August 2026. See the full report on G2 →

Where the tools actually differ

The rows that separate the vendors, plus the basics they all share.

✓available –not available ?no public information
FeatureVarifyAB TastyConvertOptimizelyVWO

Flat price per domain available

The other four bill by traffic: monthly tracked, tested or active users.

✓––––

Pricing published

Convert publishes plans and overage; AB Tasty publishes its plan table without amounts.

✓–✓––

Works without cookies

Varify stores the variant assignment in local storage.

✓––––

No personal data stored

Convert states its cookie is non-PII; Optimizely uses a random visitor ID.

✓–✓✓?

Company and hosting in the EU

Varify is a German company hosting in Germany. Convert and Optimizely offer EU hosting but are US-based companies.

✓✓––?

Automatic import of existing analytics goals

✓??––

Visual editor without developers

✓✓✓✓✓

AI writes variant code from a prompt

At Varify as Prompt Based Experimentation.

✓✓?✓✓

Server-side and feature-flag experiments

Varify via API; dedicated SDKs are not available yet. Convert from its Pro plan, Optimizely in a separately licensed product.

✓✓✓✓✓

Source: Claude Research, September 2026. All competitor information comes from publicly available sources: vendor websites, product documentation and review platforms, as checked for our one-on-one comparisons in September 2026. Feature sets change constantly and the vendor's own statement always takes precedence. If a row is out of date, email us at info@varify.io and we will correct it.

Where new Varify customers come from

Websites that replaced their previous testing tool with Varify, for the four vendors compared on this page.

Source: BuiltWith, Customer Gain Totals. The VWO row read 18 September 2026, the other rows retrieved 21 Nov 2025.

VWO447
Optimizely176
Convert132
AB Tasty26

Switching to Varify in three steps

Whichever tool you come from. The AI CRO Audit supplies the idea, Prompt Based Experimentation builds the variant.

0115 minutes

Add the snippet

Via your tag manager or straight into the head.

0230 minutes

Launch your first experiment

Goals come from your analytics. Build in the editor or describe it as a prompt.

03runs alongside

Analyse and learn

In Varify or your own analytics, with the goals you use today.

Results from real experiments

See all success stories →
AlpacaCamping Camping · Germany

+57%

A preview of available pitches on the search page raised booking intent.

Read the success story →
Carglass® Auto glass · Germany

+33.7%

A before-and-after of the repair replaced the list of USPs.

Read the success story →
Buhl Software · Germany

+16%

Real user numbers and star ratings in the hero built trust.

Read the success story →

Frequently asked questions

The ratings come from the G2 comparison report Fall 2026 in the A/B testing category, with reviews collected through 2 August 2026. The feature rows come from each vendor's website, product documentation and review platforms — the same research as our one-on-one comparisons. Where a vendor publishes nothing, the table says so instead of guessing.