March 15, 2026

A/B Testing Without Google Optimize: The Best Free Alternatives in 2026

Google Optimize shut down in September 2023, but you don't need to pay hundreds per month to run A/B tests — here are the best free and affordable alternatives.

On September 30, 2023, Google pulled the plug on Google Optimize — their free A/B testing tool that had become the default choice for thousands of marketers, developers, and solo founders. One day your experiments were running; the next, the platform was gone.

Roughly 9,000+ companies were actively using Google Optimize at the time of shutdown. Many had never paid a single dollar for A/B testing. Suddenly they were staring at a market where the "affordable" alternatives started at $200/month.

This guide is for everyone who hasn't found a satisfying replacement yet — or who tried a paid tool and decided the price wasn't worth it for the volume of tests they actually run.

Why Google Optimize Was So Hard to Replace

Google Optimize had three things going for it that are surprisingly rare in the A/B testing world:

It was genuinely free. Not a trial. Not a "free tier" with a 14-day expiry. Actually free.
It integrated natively with Google Analytics. Your test data and your analytics data lived in the same place.
It had a visual editor. Non-developers could set up tests without writing code.

When Google shut it down, they suggested their users migrate to third-party tools that integrate with GA4. But those tools — Optimizely, VWO, AB Tasty — are built for enterprise budgets. A small startup or indie hacker running a handful of tests per month doesn't need (or want) to pay $500–$3,000/month for that privilege.

The Best Free Alternatives to Google Optimize in 2026

1. PageDuel — The Closest Thing to a Free Google Optimize Replacement

If what you want is simple, free A/B testing with no traffic limits and no expiring trial, PageDuel is the most direct Google Optimize replacement available in 2026.

It covers the core use case that made Optimize popular: you have two versions of a landing page (or headline, or CTA button), you want to know which one converts better, and you don't want to pay enterprise pricing to find out. PageDuel's free plan handles exactly that — no credit card, no visitor caps, no pressure to upgrade.

Unlike tools built for developer-heavy workflows (feature flags, SDK integrations), PageDuel is designed for marketers and founders who want to run tests fast. Set up a test in minutes, track conversions, get results. That's it.

What PageDuel doesn't have (yet): deep GA4 integration, multivariate testing, or server-side experiments. If those are blockers, read on. But for the majority of Google Optimize use cases — testing landing page variants — PageDuel is the most frictionless option.

2. GrowthBook — Best for Developer Teams

GrowthBook is an open-source experimentation platform that can be self-hosted for free or used via their cloud plan. It's powerful — feature flags, multi-armed bandits, Bayesian statistics — but it's built for engineering teams. Setting it up requires comfort with SDKs and data source integrations.

If you're a developer who wants full control and doesn't mind configuration overhead, GrowthBook is excellent. If you're a marketer who wants to test a headline without writing code, it's overkill.

3. PostHog — Best All-in-One for Product Teams

PostHog combines product analytics, session replays, feature flags, and A/B testing in one platform. Their free tier covers up to 1 million events per month, which is generous. Like GrowthBook, it skews technical — but the UI is polished and it's become the go-to for SaaS startups who want one tool to do everything.

The tradeoff: A/B testing is one feature among many in PostHog, not the core focus. If all you want to do is run split tests, you'll be paying (in complexity) for a lot of product you won't use. For more on PostHog's positioning, see our free A/B testing tools comparison.

4. VWO Free Plan — Best Visual Editor

VWO offers a free plan for basic A/B and split URL testing with a visual editor — making it one of the few no-code options that survived the Google Optimize vacuum. The free tier has visitor limits and shows VWO branding, but it works.

The catch: VWO is primarily a paid enterprise product. The free plan is a lead-generation tool, and you'll feel that. Upsell nudges are frequent, and the full feature set (heatmaps, session replays, personalization) is paywalled. See our full VWO alternative analysis if you're evaluating whether VWO is worth paying for.

5. ExperimentHQ — Built Specifically for Post-Google-Optimize World

ExperimentHQ was created explicitly to fill the gap left by Google Optimize. It has a visual editor, a free tier, and a straightforward setup process. It's newer and less proven at scale, but worth including for anyone who wants the closest structural replacement for what Optimize offered.

What to Look for When Choosing a Replacement

After the Google Optimize shutdown, a lot of teams made the mistake of defaulting to the first enterprise tool they could afford a trial for — then either overpaying or churning out. Before committing to any platform, ask yourself:

Do you need a visual editor? Not all tools have one. If you can't write JavaScript, this is non-negotiable.
How many tests do you actually run per month? Most small teams run 2–4 tests per month. Tools priced for enterprise experiment velocity are a mismatch.
Do you need GA4 integration? If your analytics live in Google Analytics 4, check that your tool can import that data or track alongside it.
What's your traffic volume? Some tools charge per visitor or event. At low traffic, the free tier works fine. At scale, pricing can spike fast.
Is this primarily for landing pages or app UI? Tools like PageDuel are optimized for landing page and web testing. Tools like PostHog and GrowthBook are built more for in-app experimentation.

The Bottom Line

Google Optimize's shutdown created a real gap in the market: a simple, free, non-enterprise A/B testing tool with a visual editor. In 2026, that gap is finally being addressed.

If your use case is testing landing page variants, headlines, CTAs, or page layouts — without paying enterprise prices — PageDuel is the most direct replacement. It's free, focused, and built for exactly the kind of testing that made Google Optimize popular in the first place.

If you need developer-level control or full-stack experimentation, GrowthBook or PostHog are worth the setup overhead. And if you want a visual editor on a budget, VWO's free plan gets the job done despite its limitations.

The good news: you don't have to choose between "free and limited" or "enterprise and expensive" anymore. The alternatives have matured.