WordPress A/B testing, inside the block editor
WordPress A/B testing means showing two versions of a block to two shares of your visitors and keeping the one that converts. Accelerate does it inside the block editor: duplicate the block, edit the copy, publish. A live probability to win shows while the test runs. No code, no snippet, and the winner goes into the page with one click.
- Duplicate any block into a variant, edited like any other block
- A live probability to win, no fixed sample size
- Server-side rendering, so nothing flickers and your cache hit rate does not move
Free up to 1 million tracked page views a month. No credit card.
Works on any WordPress host, including:
How WordPress A/B testing works in Accelerate
No external tools, no tracking scripts to install. If you can edit a page, you can run a test.
Duplicate a block
Turn any block into a test, then duplicate it to create a variant. Edit it visually: headline, CTA, image, or the whole layout.
Run the test
Publish. Accelerate splits traffic, renders each variant server-side, and tracks conversions automatically.
Ship the winner
Bayesian statistics call the winner the moment the evidence is clear. Promote it in one click, or let it auto-declare.
Testing titles and featured images without a duplicate block
Some tests do not need a duplicated block. Run a title or featured-image experiment straight from the post itself, watch the numbers in the page HUD, and promote the winner without leaving the editor.
What you can test: any block, in any post, page or synced pattern
A/B testing lives where you already work: inside the block editor. Duplicate a block, change what you want, and Accelerate builds the experiment for you. No developer, no external dashboard, no copy-pasted snippets.
- Works with any WordPress block, theme, or page builder
- Test headlines, CTAs, images, or an entire section layout
Live test · 30 days
Variant winningBayesian results: a probability to win you can read at any time
Bayesian statistics give every variant a live probability of being the best and a credible interval for the lift, readable at any moment, with no fixed sample size to wait out and no peeking penalty that breaks classic tests.
- Probability-to-win and 95% credible intervals, per variant
- Results update live: check them whenever you want
The winner becomes the page, in one click
Most tools stop at a report telling you which variant won. Then you copy the change back by hand. Accelerate writes the winner straight into the page: promote it in one click, or let it auto-declare, and the variant that won becomes the published content every visitor sees.
- The winning variant becomes the live block: no manual copy-paste
- Auto-declare at your threshold, or promote with one click
A/B testing with full-page caching, and no flicker
WordPress renders each variant itself, on the server, before the page reaches the browser. No external JavaScript overlay swapping content after load, no flash of the original, no extra tag slowing the page down.
- Zero content flicker: visitors see the variant instantly
- No third-party script and nothing to slow your Core Web Vitals
Everything in A/B Testing.
Bayesian statistics
Probability-to-win you can read any time, so you call a winner with confidence, not a guess.
Adaptive allocation
Traffic shifts to the leading variant as evidence builds, so you lose fewer conversions mid-test.
Auto-declare winners
Promote the winner once it clears your threshold, so wins ship without you watching the dashboard.
Server-side rendering
Variants render natively, no flicker or external overlay, so testing never slows the page down.
Native block variants
Duplicate any block to make a variant, edited visually, so anyone can launch a test without a developer.
Experiments dashboard
Every running and finished test in one place, so you always know what is live and what won.
Native or bolted-on
| Accelerate | Snippet-based testing tools | |
|---|---|---|
| Where you edit | The WordPress block editor | A separate SaaS editor |
| Script on your pages | Accelerate's own, served from your site | The vendor's snippet |
| How variants render | Server-side, in the page | Client-side, swapped in after load |
| Winner into live content | One click in the editor | Rebuilt by hand in WordPress |
Weighing a specific tool? Side by side with Nelio A/B Testing, VWO and Optimizely.
Run and read tests from Claude Code or any agent
The Accelerate AI Toolkit turns your site into something you can talk to. Ask for a test: it plans the variant, applies your brand standards, creates it, and tells you when there is a winner.
/accelerate-testPlan, create, monitor & call tests/accelerate-optimize-landing-pageTurn a page’s data into a test/accelerate-evolveRun a multi-round optimization loop/accelerate-learnLearn from past test results
Common questions about WordPress A/B testing
Short answers to the questions people ask about A/B testing in WordPress.
- How does WordPress A/B testing work?
- Accelerate creates A/B tests by duplicating any WordPress block (like a headline, button, or image) and showing different versions to different visitors. The plugin automatically tracks which variant performs better based on your conversion goals, then helps you choose the winning version based on statistical significance.
- Do I need coding skills to run A/B tests?
- No coding required. Accelerate integrates directly into the WordPress block editor. Simply duplicate a block to create a variant, edit it visually, and the test runs automatically. All configuration happens through familiar WordPress interfaces, no JavaScript or technical setup needed.
- How long should I run an A/B test?
- Most tests need at least 1-2 weeks to reach statistical significance, depending on your traffic. Accelerate displays real-time confidence levels so you know exactly when you have enough data to make a decision. We recommend running tests until you reach 95% confidence or higher before declaring a winner.
- What can I test with Accelerate?
- You can test any WordPress block: headlines, images, buttons, call-to-action sections, entire page layouts, and more. Test one element at a time (A/B testing) or multiple elements simultaneously (multivariate testing). The plugin works with any block-based theme and all popular page builders.
- How much does Accelerate cost?
- Accelerate is free to download from the WordPress plugin directory with no hidden fees or credit card required. For advanced features like premium support and cloud analytics, we offer optional paid plans.
- Does A/B testing affect my site's SEO?
- No. Accelerate follows Google's A/B testing guidelines by serving all variants with the same URL and using JavaScript to show different versions to visitors. Search engines only see your default content, so there's no duplicate content penalty or SEO impact. Tests run client-side without affecting crawlability.
- What is Bayesian A/B testing, and why does Accelerate use it?
- Traditional (frequentist) testing makes you pick a sample size up front and wait until the test ends before reading results. Accelerate uses a Bayesian model instead: it continuously calculates the probability that each variant is the best, along with a credible interval for the lift. That means results you can read at any time, no minimum sample size, and a clear statement like "Variant B has a 97% probability of beating the control" rather than a p-value to interpret.
- Does running a test mean half my visitors see the losing variant?
- Only at the start. New tests run as multi-armed bandits: every test begins with an even split while evidence builds, then traffic shifts automatically toward the variant most likely to win, so fewer visitors see the weaker version. Guardrails keep each variant above a minimum share so the test keeps learning, and before a winner is declared the split returns to even for a clean confirmatory read. Classic fixed-split testing remains available if you prefer it.
One toolkit, not four plugins.
All featuresThe right message for each visitor.
Returning
Rotate campaigns, no deploy.
First-party traffic, native to WP.
Ask your data in plain English.
›Why did signups rise?
Returning visitors converted 27% better last week.
Run your first A/B test today
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Free up to 1 million tracked page views a month. Page updated 25 September 2026.