evolveAB vs VWO
Short version: VWO is a conversion optimization suite built for marketers. Its visual editor lets a non-developer change any page, and the same account has heatmaps, session recordings, surveys and personalization. VWO and AB Tasty have since combined under the Wingify name, and vwo.com now redirects there. It fits teams that want to test pages no developer has touched, or want testing and behaviour analytics in one tool. evolveAB is narrower. It runs A/B tests and bandits on Next.js App Router pages, picks the variant in proxy.ts before the page renders, keeps raw events in your Postgres, and sends winners back as pull requests.
We make evolveAB, so read this with that in mind. Every VWO claim below links VWO's or Wingify's own pages, checked on November 12, 2026. If something has changed, write to hello@evolveab.com and we'll fix it.
#Side by side
| VWO (Wingify) | evolveAB | |
|---|---|---|
| What it is | Experimentation, personalization, analytics (heatmaps, session recordings, funnels, surveys), feature management and more; "VWO and AB Tasty have come together" (Wingify) | A/B tests and bandits for UI regions in a Next.js App Router app |
| Price | Growth, Pro and Enterprise tiers with "Schedule a Demo" buttons and "custom pricing tailored to your needs"; 30-day free trial, no card (pricing) | Free (1 site, 1 user). Pro $149 per site per month. Growth $499 per month for 3 sites and 5 team members, then $20 per seat. 30-day free trial, no card |
| How web tests run | The SmartCode script, which "must be placed before the </head> tag" (help); it hides changed elements until the variation loads, and asynchronous loading can cause flicker (help) |
Variant chosen in proxy.ts and rendered on the server; no client-side changes |
| Next.js | An npm package for adding SmartCode to Next.js apps (help); for server-side tests, the Feature Experimentation SDK for Node and the browser (SDK README) | npx next-evolve init sets up the proxy, routes and tables; App Router only |
| Server-side settings | The SDK polls VWO for settings, every 10 minutes by default (SDK README) | A signed config held in memory, refreshed within 60 seconds or at once through a webhook |
| Plan features | Web Experimentation Pro adds multivariate testing, guardrail metrics and sample ratio mismatch detection; multi-arm bandits are on Feature Experimentation Pro (pricing) | Bandits, guardrail goals and Core Web Vitals rollback on every paid plan; bandits and guardrails on Free too |
| Where event data lives | VWO stores it; tiers set a quota of 50, 100 or 200 "events stored per MAU" (pricing) | Your Postgres; our cloud receives per-variant counts and sums |
| Self-hosting | Listed on Enterprise (pricing) | The SDK runs in your app; the cloud is hosted only |
| Ending a test | You change the page yourself, or keep the variation running in VWO | A pull request commits the winner; the experiment archives itself after the deploy (Growth plan and trial) |
#A script in the head, or a decision in the proxy
Like most visual tools, VWO loads a script in the page head that fetches the campaign and changes the page in the browser. Its help pages describe the trade-off: the SmartCode hides the elements a variation changes until it loads, custom JavaScript changes can briefly show the original, and async loading through a tag manager can cause flicker. VWO recommends loading it synchronously, high in the head, which works but means a script runs before your content can show.
evolveAB skips the browser step. The proxy assigns the visitor and the server renders that variant (in static mode, each variant is a cached page). The cost is on the other side: a developer has to mark a component as testable and say which props may change, so a marketer can't edit any element the way VWO's visual editor allows.
VWO's Feature Experimentation SDK also runs server-side, called from your own code. That avoids the script, but you wire assignment, rendering and tracking into your app yourself.
#What we don't do
- A visual editor. You can only change the props a developer has exposed, within their schema.
- Heatmaps, session recordings or surveys. We measure the goals you define for experiments.
- Multivariate tests. We run A/B/n tests and bandits, up to 6 variants including control.
- Anything outside the Next.js App Router. No Pages Router, no WordPress or Shopify themes, no mobile.
- A long track record. Sign-up opened in November 2026, so there are no large customers or case studies yet.
#When to pick VWO
- Your marketers want to test pages without a developer, on any site or platform.
- You want heatmaps, recordings and surveys in the same tool as your tests.
- You need multivariate testing or personalization campaigns.
- Your site isn't a Next.js App Router app.
#When to pick evolveAB
- Your site is a Next.js App Router app and you don't want a testing script in the head or an anti-flicker step.
- Visitor-level data has to stay in your own database.
- You'd like published prices on a page instead of a demo call.
- You want an AI to write challengers within your forbidden claims and brand profile, and the winner back in your code as a pull request.
Start a 30-day free trial, no card needed, or read the quickstart. Background on server-side testing with any tool: our Next.js A/B testing guide.
#Questions
#How much does VWO cost?
VWO, now sold under the Wingify name, doesn't list prices. Its pricing page shows Growth, Pro and Enterprise tiers with a "Schedule a Demo" button and says pricing is custom, with a 30-day free trial and no credit card needed (checked November 12, 2026).
#Is VWO now Wingify?
Wingify is the company behind VWO, and vwo.com now redirects to wingify.com. Wingify's site says "VWO and AB Tasty have come together," and its help pages and SDKs now use the Wingify name.
#Does VWO cause flicker in Next.js?
It can. VWO's web tests run through the SmartCode script, which changes the page in the browser and hides changed elements until the variation loads. Its help page says asynchronous loading can cause flicker and recommends loading the script synchronously in the head. evolveAB picks the variant in proxy.ts and renders it on the server, so the first paint is the variant.
#When is VWO the better choice?
When marketers need a visual editor, you want heatmaps and recordings next to your tests, you need multivariate tests, or your site isn't on the Next.js App Router.