# Otter vs VWO

Full-stack optimization platform for enterprises. Looking for a VWO alternative? Here's an honest, fact-checked look at how the two A/B testing tools compare.

## About VWO

VWO (Visual Website Optimizer), made by Wingify, is one of the most established A/B testing platforms — web experimentation plus separate products for behavior analytics (VWO Insights) and personalization (VWO Personalize). In January 2026, Wingify merged with AB Tasty in an Everstone Capital-backed deal, creating a combined optimization vendor with reportedly more than $100M in revenue.

## Which should you pick?

**Choose Otter if:**

- You want focused A/B testing with published, flat per-project pricing and no MTU meter
- You want GA4 events as experiment goals, not just a GA4 data push and audience import
- You want a REST API and MCP server included on every plan, not gated to enterprise tiers
- You want to know the price without scheduling a demo

**Choose VWO if:**

- You want heatmaps, session recordings, and surveys from the same vendor (VWO Insights)
- You need multivariate (factorial) testing or a dedicated personalization product
- You're an enterprise that values a 30-day full-suite trial and a sales-supported rollout

## Feature comparison

| Feature | Otter | VWO |
| --- | --- | --- |
| Starting price | $39/mo flat, published | Not published — demo-gated (third-party estimates: Growth ~$314+/mo annual at 50K MTU) |
| Free plan | No — 14-day full trial, no credit card | No — 30-day full trial, no credit card |
| Visitor limits | Unlimited on all plans | MTU quota purchased upfront, by tier |
| Cost as traffic grows | Unchanged | Scales with MTU tier |
| A/B and A/B/n testing | Yes | Yes |
| Split URL testing | Yes | Yes |
| Multivariate (factorial) testing | No | On Pro plan and above |
| Visual editor | Yes | Yes |
| Content personalization | Targeted personalization test type | Separate product (VWO Personalize) |
| Heatmaps & session recordings | No | Separate product (VWO Insights) |
| Revenue tracking | Built-in, with multi-currency conversion | Yes |
| GA4 integration | GA4 events usable as experiment goals | Data push and audience import; not usable as test goals |
| Statistical engine | Frequentist or Bayesian, per test | SmartStats (Bayesian) |
| Anti-flicker | Snippet hide, auto-removed (3s failsafe) | SmartCode body-hide (built-in) |
| REST API access | All plans (+ MCP for AI agents) | Enterprise plan |
| Setup | One script tag, self-serve | Script tag + dashboard configuration |

Information based on publicly available data as of July 2026, including third-party pricing estimates labeled as such. Features and pricing may change — check VWO's website for the latest.

## Suite vs focused tool



VWO is a mature, full-featured platform: web experimentation with a strong visual editor, plus VWO Insights for heatmaps, recordings, and surveys, and VWO Personalize for personalization — each a separate product sharing an MTU quota. If you want one vendor for all of that, VWO is a credible choice; Otter doesn't offer heatmaps or session replay and won't pretend otherwise.

Otter is deliberately narrower: visual A/B/n tests, split URL tests, and targeted content personalization, with the measurement stack — goals, revenue, statistics — built around making one decision well. Teams that already have analytics and replay tooling often don't want to buy a second copy of it to get testing.

## Pricing: a demo gate vs a price list



As of July 2026, VWO no longer publishes prices — its earlier public calculator is gone, and all three plans (Growth, Pro, Enterprise) route through a demo. Billing is per monthly tracked user, with quota purchased upfront by tier. Third-party estimates of the last published rates put Growth at roughly $314+/mo billed annually at 50K MTU, with Pro around triple that — treat those as estimates, because the official number now requires a sales conversation. VWO also discontinued the free plan it launched for Google Optimize refugees; evaluation is a 30-day full-suite trial (genuinely generous, no card required).

Otter publishes everything: $39/mo for one project, $79/mo for five, $149/mo for unlimited, all features on all plans, unlimited visitors, 14-day trial with no card. If knowing the price of software before talking to sales matters to you, that's the structural difference.

## The 2026 AB Tasty merger



In January 2026, Wingify (VWO's maker, majority-owned by Everstone Capital since early 2025) merged with AB Tasty — vwo.com now carries a co-branded "joining forces" banner. The combined company reportedly exceeds $100M in revenue. Both products currently continue side by side, but buyers signing multi-year contracts should ask how roadmaps and pricing will consolidate.

Otter is independent and month-to-month; the trade-off runs both ways — VWO offers enterprise procurement, compliance breadth (GDPR, HIPAA, CCPA, ISO, with US/EU/India data residency), and a large partner ecosystem, while Otter offers a bill you can start and stop without a contract.

## Statistics and GA4



VWO's SmartStats is a well-documented Bayesian engine using exact posterior distributions, framing decisions around potential loss. Otter lets you choose per test: Bayesian analysis reporting chance-to-beat, or frequentist analysis using a two-proportion z-test (Fisher's exact for small samples) at 80/90/95/99% confidence, with thresholds automatically Bonferroni-adjusted for multi-challenger tests. Both approaches are defensible; Otter simply lets you pick the one your team can best reason about, per experiment.

On GA4: VWO's integration pushes campaign data into GA4 and imports GA4 audiences for targeting — analysis of GA4 metrics happens in GA4, not on VWO's results page. Otter uses GA4 conversion events directly as experiment goals, so conversions you already trust are the ones your test is scored on.

## The bottom line

VWO is a strong full-suite choice — mature testing plus heatmaps, recordings, and personalization as separate products — now part of the merged VWO/AB Tasty company, with pricing that requires a demo and scales per tracked user.

Otter wins on focus and transparency: flat published pricing with unlimited visitors, GA4 event goals, per-test choice of statistical engine, and API/MCP automation on every plan rather than enterprise tiers.

If you need the whole optimization suite, evaluate VWO seriously — its 30-day trial makes that easy. If you need excellent A/B testing without an MTU meter or a sales cycle, Otter is the faster path.

## Try Otter free for 14 days

No credit card required. No visitor limits. Set up in under 5 minutes.

- [Start Free Trial](https://www.otterab.com/signup)
- [View Pricing](https://www.otterab.com/pricing)

## Frequently asked questions

### What's the main difference between Otter and VWO?

VWO is a full optimization suite — testing plus separate Insights (heatmaps, recordings) and Personalize products — priced per monthly tracked user via sales. Otter focuses on A/B testing with flat per-project pricing starting at $39/mo, published on the website, with no visitor caps.

### Is VWO's pricing public?

No — as of July 2026 VWO's pricing page lists no prices; all plans route through a demo. Third-party estimates put the Growth plan at roughly $314+/mo billed annually at 50K monthly tracked users, but those are estimates. Otter publishes every plan's exact price: $39, $79, or $149 per month.

### Does VWO have a free plan?

Not anymore. VWO discontinued its free Starter plan and now offers a 30-day all-inclusive trial instead (no credit card required — genuinely one of the better trials in the category). Otter's trial is 14 days, also with no card, and paid plans start at $39/mo.

### Does Otter have heatmaps or session recordings?

No. Otter focuses on A/B testing only. If you need heatmaps or session replay alongside testing, VWO sells them as VWO Insights; if you only need experimentation, Otter avoids paying for a second product.

### Can Otter replace VWO for A/B testing?

For visual A/B/n tests, split URL tests, revenue tracking, and goal-based reporting — yes. VWO additionally offers multivariate (factorial) testing on its Pro plan and a dedicated personalization product that go beyond Otter's scope.

### What happened with VWO and AB Tasty?

In January 2026, VWO's parent company Wingify merged with AB Tasty, backed by Everstone Capital. Both products currently operate side by side while the companies integrate.