Optimizely VS VWO VS Google Optimize: Which one to choose? (2026)

Scouring the market for the best A/B testing tool can be a daunting task, given the number of choices. In this article, we compare three frequently searched contenders: Optimizely, VWO (Visual Website Optimizer), and the now-retired Google Optimize.

We'll compare their offerings, pros and cons, and help you decide which one suits your needs. We've also added Mida as the fourth option — since Google Optimize's shutdown, it has become the most commonly recommended free replacement.

Optimizely

Typically dominating enterprise-grade A/B testing conversations, Optimizely stands tall with its feature-rich toolset and intuitive interface. Its pedigree is evident with many Fortune 500 companies being regular patrons.

Price:

• Undisclosed. Minimum contracts reportedly start at $36,000 per year — see our detailed breakdown: how much does Optimizely cost?

Pros:

• Exceptional user interface and experience.
• Advanced statistical modeling allowing robust data analysis.
• Fantastic feature management, enabling comprehensive control over your testing and optimization landscape.
• Server-side experimentation and feature flags for engineering-led teams.

Cons:

• Pricing suits larger corporations better — not cost-effective for teams that only need client-side A/B testing.
• The setup process can be intricate and require significant effort, particularly for complex web ecosystems.
• Percentage-of-revenue pricing reported by some users creates unpredictable costs.

VWO (Visual Website Optimizer)

VWO is a highly versatile and comprehensive A/B testing tool, attracting businesses of all sizes with features like heatmaps, session replays, and multivariate testing. 2026 update: VWO merged with AB Tasty in January 2026 under Everstone Capital's ownership. Its free Starter Plan has been discontinued.

Price:

• Former free starter plan: $0/mo below 50,000 MTU — now discontinued
• Paid plans range from approximately $7,000 to $21,000 per year for 100K MTU and above
• Advanced features require higher-tiered plans; check current VWO pricing directly

Pros:

• Extensive A/B testing features let businesses execute sophisticated testing strategies.
• Behavioral targeting and heatmap analysis aid in obtaining deep user insights.
• User-friendly interface for visual testing workflows.

Cons:

• Free plan discontinued — no self-serve entry point below paid contracts.
• Script can cause CLS issues and adds 2-3 seconds of variation loading time.
• Advanced features gated behind higher tiers, making mid-market pricing steep.
• VWO + AB Tasty merger signals further upmarket pricing pressure.

Google Optimize

Google Optimize was known for its clean, efficient way of allowing businesses to conduct A/B testing for free. Despite this, it lacked the dynamism the competition offered and has since been retired.

Price:

• Forever free $0 — but permanently shut down September 30, 2023

Pros:

• Was free and accessible for everyone.
• Deep native integration with Google Analytics.

Cons:

• Permanently shut down — no longer accessible.
• Didn't keep up with advancement rates of competitors before closure.

Check out the 5 free Google Optimize alternatives in 2026 — the only guide that limits its list to platforms with ongoing free plans, not just trials.

Mida: The Lightweight Alternative

Since Google Optimize's shutdown, many teams have replaced it with Mida — the only free tool in the market that combines a visual editor, native GA4 integration, and an ongoing free tier with no credit card required.

Price:

• Free Sandbox: up to 100,000 MTU per month, forever
• Growth: from $399/month, or $299/month billed annually

Pros:

• Free up to 100,000 MTU — double VWO's former free tier.
• 15KB compressed script — measurably lighter than Optimizely or VWO.
• Native GA4 integration, no custom setup required.
• No-code visual editor and MidaGX AI experiment generation.
• Transparent self-serve pricing published at mida.so/pricing.

Cons:

• No heatmaps or session recordings — pure A/B testing focus.
• No server-side experimentation or feature flag management.

Which Tool Should You Choose?

• Choose Optimizely when you need enterprise server-side feature flags, deep CDP integrations, and have a budget of $36,000+/year.
• Choose VWO when you need heatmaps, session recordings, and A/B testing under one contract, and have budget for paid plans.
• Choose Mida when you want fast client-side A/B testing, a visual editor, GA4 integration, and the most generous free tier in the category (100,000 MTU free forever). See the full Mida vs VWO breakdown, or follow the migration guide if you're moving from an existing platform.
• Google Optimize is not an option — it shut down permanently in September 2023.

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