Companies Using VWO

Seven years reading technology adoption data for go-to-market teams, and VWO is one of the clearer install bases I've seen. As of our September 2026 crawl we detect its SmartCode on 47,565 domains and match 21,958 of them to a company record.

Growth trajectory

The chart runs from 37,770 domains in June 2026 to 47,565 in September. That is not a 26% adoption surge. The set of domains we crawl turns over every month, with dead sites dropping out and newly found ones coming in, and our detection signals widen over time.

What changed underneath is the useful part. Of the 17,004 domains that first showed VWO in May, 16,600 were new to our crawl within three days. By September only 351 of 2,245 new sightings were domains new to us, so recent growth is the SmartCode landing on sites we already watch.

Sales Signal: This market is expanding on adoption, not on our index catching up. Late-2026 additions just bought experimentation software, so they have a budget line, an owner and no incumbent habits. Good timing for session replay and CRO services.

"Every experimentation vendor claims growth. The number I trust is what share of new detections are domains we already knew about, and for VWO that went from 2.4% in May to 84.4% in September." - Sophie Clarke, Product Marketing Manager at TechnologyChecker.io

Customer profile

37.23% of matched VWO companies have ten employees or fewer and 83.36% sit at 200 or under. The age data agrees: 37.91% founded in the 2010s, only 7.85% before 1960. Experimentation is bought by companies that grew up measuring things.

The enterprise tail is thin at 6.12% over 1,000 staff, but it isn't decorative. HCLTech, Genpact, Schneider Electric and ICICI Bank all carry live SmartCode. Read the detection host before the logo, though. Home Depot's sits on careers.homedepot.com, Expedia's on partner.expediagroup.com.

The script URL settles a question that usually needs hedging. VWO's SmartCode carries an account id, and across the 2,882 domains exposing one we count 1,825 distinct accounts, about 1.58 domains each. These distributions are close to buyer-shaped.

Sales Signal: Two plays. In the 11-to-200 band VWO is the primary testing tool and the buyer is a growth lead you can reach directly. For enterprise detections on a single subdomain, pitch consolidation: one department pays for testing, the rest of the estate has none.

Industry and geographic concentration

No industry clears 8%. Software Development leads at 7.08%, Retail follows at 6.42%, and Financial Services (4.28%) plus Insurance (2.97%) make 7.25% of regulated, high-value traffic. VWO is horizontal, as any tool that tests conversion pages would be.

Geography is more interesting. The US takes 46.12% and the UK 10.98%, but the Netherlands sits third at 8.03%, well clear of Canada (3.69%) and Australia (3.49%) on a far smaller domestic market. It isn't one hosting fleet either: the 658 Dutch domains we observed load the SmartCode from VWO's own script host, no shared platform underneath.

Sales Signal: The Dutch cluster is 1,700 real companies and the market least likely to be on your prospect list already. Brazil (2.98%) is the other one worth working: Itau Unibanco, Natura, Claro and Magazine Luiza all run VWO.

Why there is no migration table

Most profiles here carry a migration section. VWO's doesn't. We took 8,824 domains that dropped VWO and asked what they run now: Statsig appears on 1.43% of leavers against 1.02% of stayers, a 1.4x lift, and Convert on 1.48% against 1.1%, so 1.35x. Our publication gate is 2x.

Two candidates ran the wrong way. Optimizely is on 0.66% of leavers and 3.32% of stayers, Google Optimize 0.63% against 2.29%. Both are more common among companies that kept VWO, the signature of tools that stack rather than replace. We also left out 108 domains where Google Optimize disappeared, since Google shut it down on 30 September 2023.

Sales Signal: Don't buy a leaver list expecting a migration. The 10,037 domains that dropped VWO since we began tracking in March 2026 are mostly programmes that went quiet, and 50.8% of those rows were seen only once. We tested consent gating as the explanation and it failed: consent managers are less common among leavers (24.95%) than stayers (35.36%). Treat it as dormant CRO budget.

"The absence of a migration table is the finding. Experimentation tools don't replace each other, they pile up and then go quiet together. A churned VWO domain is a company that stopped testing." - Sophie Clarke, Product Marketing Manager at TechnologyChecker.io

Technology ecosystem

Google Tag Manager is on 93.65% of the 46,986 live VWO domains, with Google Analytics at 83.54%. The pairing is structural: the SmartCode must fire before the page renders, and a container is how a marketing team ships that without a release cycle.

The consent layer is the number sales teams skip. OneTrust (14.71%), Cookie Control (8.62%), Cookiebot (8.48%) and CookieYes (4.53%) put roughly a third of the base behind a managed consent tool, a sampling problem inside the customer's own results. WordPress carries 29.02%, and Adobe's stack stays thin.

Sales Signal: The 5.87% on an Adobe tag manager are the enterprise slice, with budget and a competing vendor already in place. The consent overlap is the sharper wedge: helping a testing team reason about consented versus unconsented traffic is a named problem with a third of this base behind it.

G2 review signals

The pro list and the con list describe two stages of one relationship. Pros: ease of use (180 mentions), responsive support (146), intuitive interface (138), easy setup (111), analytics integration (92). Cons: limited features (50), missing features (47), reporting and integration limits (45), learning curve (34), slow performance (34).

That is 667 positive mentions against 210 negative, roughly 3:1, and every pro is about starting while every con is about scaling. Our data explains where the split lands. Only 6.12% of matched companies employ more than 1,000 people, so most reviewers never reach the reporting limits. The 1,276 large companies do.

Sales Signal: Selling against VWO, the opening is the ceiling, not the entry. Target the 51-200 and 201-1,000 bands, where a team has outgrown the visual editor but still ships through a tag manager.

Key takeaways

1. VWO is second by footprint among live experimentation platforms, at 47,565 domains against Statsig's 62,557 and Optimizely's 45,448.

2. Growth turned real in the second half of 2026. 97.6% of May's additions were domains new to our crawl; by September, 15.6%.

3. The base is digital-native and small. 37.23% under ten staff, 37.91% founded in the 2010s, 7.85% before 1960.

4. There is no migration corridor. Nothing cleared our 2x gate against 8,824 leavers.

5. The stack is a Google stack. 93.65% Google Tag Manager, 83.54% Google Analytics, a third behind a managed consent tool.

6. The vulnerability is the ceiling. G2 pros are about setup, cons about limits, and the 6.12% above 1,000 staff is where limits bite.

Sales applications

Outreach template. "I noticed [Company] runs VWO on [detection host]. Teams your size, and 46% of VWO's base sits between 11 and 200 staff, hit the same reporting wall past their first dozen tests. Worth 15 minutes?" Name the actual subdomain; it reaches whoever owns it.

Targeting strategy. Filter our VWO list on TechnologyChecker.io for 51 to 1,000 employees plus Google Tag Manager, then exclude anyone on an Adobe tag manager. What's left has a testing habit, no enterprise vendor, and enough traffic for the reporting complaints to be real.

Competitive angle. Skip the churn list. Those 10,037 dropped domains are dormant programmes, not buyers in market. Target the Dutch cluster instead.

It all comes from one place: 47,565 VWO domains and 21,958 enriched companies in our September 2026 crawl, filterable on TechnologyChecker.io.