What is the difference between an A/A test and an A/B test?

An A/B test compares two or more different versions of a page. In an A/A test, both versions are identical. Optimizely's documentation says an A/A test typically serves to validate the experiment configuration, and that most A/A results should come out statistically inconclusive, because nothing changed. A difference can still appear by chance, since statistical significance is a probability.

What A/B testing tools integrate with Webflow, and which one fits your site?

Webflow's own Optimize add-on fits a site whose plan takes it, for text, image, and style tests. The Optibase app, from the Webflow app marketplace, suits a plan that can't take the add-on, and runs on a script. Optimizely, a script-based tool, fits a team that already runs it. Both scripts go into the site's custom code, which needs a paid site or Workspace plan. We recommend a tool on the first call and confirm it on Day 3.

How do you implement A/B testing on a Webflow site?

The plan comes first, with the pages worth testing and the tool for your site plan. Goals and tracking go live before any variant runs, so the test can track conversions such as demo requests and sign-ups from its first day. Then come the variants built in Webflow and the test itself. A split URL test needs its variant page set up for search before launch. Once traffic gives an answer, we read the result and plan the next test.

How do you use Webflow Optimize for split testing?

Through a redirect variation. Optimize sends part of your visitors to a second URL and compares the two. Its redirect variations avoid permanent 301 redirects, and we add a canonical tag on the second page that points to the original. Google's testing guidance gives these steps to keep a test's impact on your Google Search performance minimal. We switch the test off when it ends.

Can Webflow help teams optimize conversion rates?

Yes, when the tests are set up and read with care. For Setproduct, a UI-kit marketplace, we set up the analytics, conversion tracking, and A/B testing infrastructure on its new Webflow site. Setproduct got a +30% conversion rate improvement into product sales. The case credits that result to the marketplace rebuild together with iterating on what the tests revealed.

How much does A/B testing on Webflow cost?

The tool and our work are two separate costs. Webflow's pricing lists Optimize from $299/month for 25,000 monthly page views on yearly billing, following your site plan's billing cycle, and a marketplace app has its own plans. For our work, a one-time project starts at $60/hour, hourly packages at $900/month, and a monthly retainer at $3,000/month. You get a fixed quote before the work starts.

Which agency does A/B testing and CRO on Webflow?

Foursets does. We run it as a project that gets your first test live, then through a retainer or an hourly package that keeps tests running. Whichever team you pick, ask three things. Who sets up the goals before a test starts? How are split URL tests kept safe for search? Who builds the winner into the page when a test ends? At Foursets, one in-house team handles all three.

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Webflow Development

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A/B Testing

Webflow A/B Testing That Gets Your Test Plan Out of the Backlog

Traffic reaches your Webflow site, the demo rate stays flat, and every variant you want to try waits in the developers' queue. We plan the tests, pick the tool that fits your site, set up tracking before any variant runs, and make each variant in Webflow. When a test ends, we build the winner into the page.

Plan my first test

See our work

Trusted by 50+ B2B marketing teams across 25+ countries.

450+

CMS items migrated from WordPress to Webflow

see case study

+94%

Event registrations after the conference site redesign.

see case study

$50M+

Revenue tier of clients they attract.

see case study

2 weeks

PDF of ideas to live sales tool.

see case study

+20%

Organic traffic growth after migration.

see case study

EU-wide

Lead generation reach after B2B website launch.

see case study

+300%

Organic search traffic increase after redesign.

see case study

50%

Increase in qualified leads post-launch.

see case study

2x

Organic traffic increase after redesign.

see case study

4 weeks

Full website developed and launched twice over.

see case study

2x

ICP conversion increased.

see case study

5 weeks

Full website with SEO strategy delivered.

see case study

2-3 month

Full redesign, migration, and SEO delivered.

see case study

35%

Lead-to-client conversion rate from website.

see case study

50+

Enterprise clients signed from the website

see case study

75+

Blog articles migrated without a single loss.

see case study

1+year

Ongoing retainer after initial launch.

see case study

100%

URL coverage across both merged domains.

see case study

450+

CMS items migrated from WordPress to Webflow

see case study

+94%

Event registrations after the conference site redesign.

see case study

$50M+

Revenue tier of clients they attract.

see case study

2 weeks

PDF of ideas to live sales tool.

see case study

+20%

Organic traffic growth after migration.

see case study

EU-wide

Lead generation reach after B2B website launch.

see case study

+300%

Organic search traffic increase after redesign.

see case study

50%

Increase in qualified leads post-launch.

see case study

2x

Organic traffic increase after redesign.

see case study

4 weeks

Full website developed and launched twice over.

see case study

2x

ICP conversion increased.

see case study

5 weeks

Full website with SEO strategy delivered.

see case study

2-3 month

Full redesign, migration, and SEO delivered.

see case study

35%

Lead-to-client conversion rate from website.

see case study

50+

Enterprise clients signed from the website

see case study

75+

Blog articles migrated without a single loss.

see case study

1+year

Ongoing retainer after initial launch.

see case study

100%

URL coverage across both merged domains.

see case study

Webflow A/B Testing

WHO WE ARE

Foursets is a Webflow Premium Partner whose designers, developers, and SEO specialists all work in-house. We take on Webflow A/B testing as a project. Our team sets up the goals and the testing tool and makes the variants, so the work stays out of your engineers' queue.

Your team wants the next redesign decided on test results, and leadership wants that proof first. On your site, every variant for A/B testing with Webflow still waits for a developer.

Foursets has run design, development, and SEO under one roof since 2021, with zero outsourced freelancers.

PROBLEMS > SOLUTION

Common Problems, Uncommon Webflow A/B Testing Solutions

Challenge

Each headline or layout you want to test becomes a developer ticket, so the test plan sits in the backlog and conversion rates stay where they are.

Webflow Optimize, a marketplace app, and a script-based tool each come with their own plan, price, and limits, so the choice stalls and no test starts.

Nobody trusts the test results, because demo requests and sign-ups were never counted as conversions, or someone stopped a test once one version looked ahead.

Your team added a testing script, and its effect on load times and the site's security settings went unchecked.

A split URL test left a second copy of the page open to search engines, and the test kept running after the result was in.

Our Solution

Our developers build variants of headlines, CTAs, layouts, and whole sections in Webflow, so each test launches on the date your test plan gives it.

We pick the setup from your site plan, your traffic, and what each test has to change on the page. You hear the trade-offs on the first call.

We set up demo requests and sign-ups as goals before any test goes live, and we read a test once it has gathered enough data.

We install the script, measure page speed while tests run, and add the script to your Content Security Policy when the site has one.

We set up the variant page the way Google's testing guidance describes, with a canonical tag pointing to the original, a temporary redirect, and the test switched off when it ends. The winning version is then built into the original page.

WEBFLOW EXPERT & PARTNER

Webflow experts, Premium Partners, and template authors, all in one shop

Foursets has been a certified Webflow expert since 2019. It is also an official Webflow template author and a Premium Partner, the highest tier in Webflow's partner program outside of Enterprise. On a mission to become a Webflow Enterprise Partner.

Reviewed by Webflow

Webflow independently reviewed our work and certified it meets their standards. Our in-house developers build the variants on your site.

A line to Webflow

When an Optimize setting or a split URL test raises a platform question mid-test, we take it to Webflow's partner team through our Premium tier.

One owner for every layer

Goals, scripts, CMS templates, and SEO settings sit with the same in-house team.

Our Services

A/B Testing in Webflow Built, Tracked, and Shipped by One Team

Your fixed quote names which of the parts below your site needs.

(1/8)

Test plan for your highest-traffic pages

We choose the pages, the change that goes first, and what each test measures. The plan starts on the pages your visitors reach most.

(2/8)

Conversion tracking before the first test

Demo requests and sign-ups become goals before launch. Optimize tracks clicks, page views, and HubSpot or Marketo forms once connected. Our Webflow developers write a custom goal for anything else.

(3/8)

Testing tool setup

Optimize, a marketplace app, or a script-based tool, set up for your site plan. A third-party script tag goes into the site's custom code, and our developers own what it does.

(4/8)

Variants built in Webflow

Headlines, CTAs, layouts, and whole sections. Optimize edits the text, images, and styles of page elements in place. Its variations can't change the page structure or add a section, so we run those as split URL tests.

(5/8)

Split URL tests that stay safe for search

A new page structure or new Webflow CMS content goes on a second page with a canonical tag to the original. A temporary redirect sends part of the traffic there until the test ends.

(6/8)

Speed checked during every test

We measure page speed and Core Web Vitals on the tested pages before launch and again while each test is live.

(7/8)

Results read and the winner built in

When a test has enough data, we read the result, make the winner part of the page, and switch the test off. Then the next test on the plan starts.

(8/8)

Tests that keep running after launch

After the first result, testing continues on a retainer or an hourly package as part of Webflow maintenance, with the same team on the next tests.

Case Studies

Don't take our word for it, look at the results

Six B2B websites our team built and grew in Webflow. Each card opens the full case study.

A UI-kit marketplace migrated off Tilda and rebuilt for SEO and conversion.

Setproduct is a marketplace selling UI kits and templates to designers and developers. Their growth was capped by Tilda: SEO indexing issues, weak product-page conversion, and a publishing flow that took days per release. We migrated them to Webflow, fixed the SEO foundation, and rebuilt the marketplace for conversion.

Watch case study

2 years. 3 CMOs. One Webflow partner.

CIM is an Australian B2B SaaS company building AI-powered software for high-performance commercial real estate. They came to us with an unmaintainable Webflow build after their in-house specialist left. Two years later, we've shipped through three CMO transitions, doubled their mobile PageSpeed, and built a CMS component library that lets every new marketing leader move fast on day one. Same team. Same site. Same partner.

Watch case study

Built the brand from scratch. 35% of website leads convert into clients.

Momentum Studios is a strategy consultancy serving startups, top-tier companies, and social impact organizations. They came to us with sharp consulting work and no visible identity to wrap it in. We built the brand, the website, and the sales collateral. The CEO says about one in three website leads now convert into clients.

Watch case study

From 3 MQLs a month to 150, and 500% organic traffic growth.

Penti sells AI-powered pentesting to SaaS companies that need to clear enterprise security reviews fast. They came to us for a new Webflow site, and we found more underneath it: a brand that couldn't decide what it was, and a security architecture blocking their own analytics and SEO. We rebranded them, redesigned the site, and migrated off WordPress in under four weeks. Then we spent 18 months building the SEO engine that took them from 3 MQLs a month to 150.

Watch case study

From zero inbound leads to 50+ enterprise clients.

BD Emerson is a cybersecurity, privacy, and compliance consulting firm. They came to us on WordPress with zero inbound leads, a failed outbound experiment, and a tight budget. We migrated the website to Webflow, ran their SEO for years, then rebranded the whole company once the results earned it. They went from referrals-only to 50+ enterprise clients sourced through the site.

Watch case study

From zero inbound leads to 62 MQLs in 14 months.

CyberCrest is a cybersecurity and compliance firm whose website was a digital dead end. Outdated design, zero inbound leads, and a structure that buried whatever traffic showed up. We rebuilt the site on Webflow in 2 months, then ran SEO and content for the 14 months that followed. The result: 62 MQLs, 14.3x visibility growth, and 100+ keywords ranking in Google’s top 10.

Watch case study

Explore all case studies

22

Pricing

Deep expertise with simple, transparent pricing

One-time engagement

Fixed scope, fixed price

A full website redesign, migration, or SEO audit with everything defined upfront

No surprises on the invoice

Starting from

$60/hour

Discuss my project

Hourly packages

Prepaid hours valid for a month, quarter, or year

Use them when you need them

Starting from

$900/month

Browse packages

Monthly retainers

A dedicated design and development, or SEO team embedded in your Slack

Month-to-month, no lock-in contracts

Starting from

$3,000/month

Keep tests running

webflow integrations

Your existing stack stays intact

Webflow doesn't replace your tools. It connects to them. We wire every new Webflow site to the platforms you already run, from CRM to payments to analytics, so your data flows cleanly from day one and nothing breaks at launch.

Find the Page Worth Testing First

Nick Rybak

Founder & CEO

Before any project starts, our free website audit of your current site identifies where it loses demo requests and sign-ups. Those pages are where testing starts.

Get my free website audit

Nick Rybak

Founder & CEO

Advantages

Why Choose Foursets to Run Your Tests

We replaced the standard agency “trust me, bro” model with radical transparency and zero hidden risks.

Split URL tests set up the way Google describes

Each variant page gets a canonical tag to the original and a temporary redirect, and comes down when the test ends. Our in-house SEO specialists set this up with the developer who builds the page.

Variants and tracking from the people who build Webflow sites

The developers who build your test variants also set up the tracking behind them, so it is ready when the variants are.

Tests judged by pipeline

We judge each test by the demo requests and sign-ups it brings, the conversions that reach your sales team. Clicks and page views stay as supporting data.

A senior team, all in-house

Pods of 5 to 8 full-time Foursets employees each keep their own clients, so the people behind your earlier tests run the next ones.

Changes live in 48 hours on average

On a retainer, a request dropped in Slack or ClickUp reaches a live URL in 48 hours on average. The average covers all request types.

Radical transparency

A shared Slack channel and a ClickUp board show each test on the plan, what it changes, and where it stands.

PROCESS

How We Get Your First Test Live

Every A/B testing engagement follows this two-month plan, from the first call to the first result.

DAY 1

Discovery call with Nick

Nick, our founder, asks which pages matter, what counts as a conversion, and which tools are already on the site.

DAY 3

Tracking audit, fixed quote, and contract

We audit your tracking and visits by traffic source and device type, then send a fixed quote and contract. The quote lists what the site needs first, such as the Optimize add-on or a testing app. If visitors can opt out of tracking, or must agree to it first, the site needs a consent tool. A site with a Content Security Policy also needs an entry for the script.

DAY 7

Kickoff and the test plan

Your shared Slack channel and ClickUp board open. The test plan names the pages, the changes, and what each test measures.

DAY 14

Goals set and variants built

Goals and tracking go live, and our developers build the variants in Webflow. Any split URL page is set up for search.

DAY 21

The first test goes live

Goals count from the start, and the test shows on your ClickUp board.

DAYS 49

The test runs

A test's length depends on your traffic and how often visitors convert, so the result may be read later than Day 56. Webflow asks for an Optimize test to run from start to finish without edits, so we leave running tests alone.

DAY 56

Result read and the winner built in

We read the result, build the winner into the page, and switch the test off.

DAY 60

Handover and the next tests

You get the results and the next tests on the plan. Testing continues on a monthly retainer or prepaid hours, with the same team in your Slack.

INDUSTRIES

B2B companies we know inside out

We’ve built and grown websites for B2B teams at every stage and across every vertical. Real projects, real clients, not capability claims.

By company size:

Startups

First websites and full rebuilds for founders who need to look credible before the revenue proves it.

Scaleups

Companies past product-market fit that need their website to keep pace with an accelerating GTM.

Enterprise

Large organizations with security requirements, approval workflows, and multiple stakeholders. SSO, audit logs, and IT sign-off, without slowing marketing down.

By industry:

Agencies

Marketing, creative, and consulting firms that need a website as sharp as the quality of work they sell.

Conferences

Event sites with speaker listings, agenda systems, and third-party registration tools, built to launch before the deadline.

Construction

Tech companies selling software, platforms, and services to the construction industry.

Cybersecurity

From compliance platforms to pentest-as-a-service, cybersecurity clients need credibility fast.

E-Commerce

Custom Webflow and Shopify builds for B2B and DTC brands whose catalogs have outgrown a template.

Education

EdTech apps and institutions that need flexible CMS, event systems, and fast content publishing.

Fintech

Regulated industries where design trust signals and technical SEO foundations win deals before demos happen.

Healthcare

HIPAA-aware builds for health tech companies that need to convert enterprise buyers.

SaaS

Growth websites for SaaS teams that move fast, scale quickly, and need a CMS they can create and manage.

Tech Companies

Technical teams that need a website design matching the sophistication of their product and the expectations of their buyers.

Venture Capital

Portfolio and fund websites that project authority to LPs, founders, and the press.

AWARDS

We don’t have a trophy shelf (remote company). But if we did, it’d look like this

Clutch Top Web Agency
in Poland

HubSpot Solutions
Provider

Semrush Certified
Expert

CSS Design Awards Honorable Mention x2

Webflow Premium
Partner

Awwwards Honorable Mention x2

Testimonials

The nice things partners say about us

Burned CMOs and founders usually come to us highly skeptical and traumatized by past agencies or freelancers. Here’s what happens after they experience actual predictability.

50+

Enterprise clients signed from the website

"They have truly transformed our marketing landscape."

Drew Danner

Managing Director, BD EMERSON

Explore case study

+300%

Organic search traffic increase after redesign.

“Working with Foursets was a transformative experience for Setproduct."

Roman Kamushken

Founder, Setproduct

Explore case study

2x

ICP conversion increased.

"We are very happy with their service."

Kateryna Dmytriyeva

Growth Manager, CIM

Explore case study

35%

Lead-to-client conversion rate from website.

"They had a strong knowledge of all aspects and provided a great thought partner to execute the goals."

Jeff Reed

Founder & CEO, Momentum Studios

Explore case study

50%

Increase in qualified leads post-launch.

“Their white-glove service is impressive.”

Orit Benzaquen

CEO, Penti

Explore case study

4.9 stars, 30 reviews

Webflow Premium
Partner & Expert

A Site Where Tests Decide the Next Design Change

Tell Nick which pages matter and what counts as a conversion. By Day 3 you have a fixed quote, and the test plan follows at kickoff.

Get my test plan

The Stats

The Team Behind Your Tests

100+

Clients served.

48 hours

On average, from a request dropped in Slack or ClickUp to a live URL, for retainer clients.

96.8%

On-time delivery rate since 2021.

Zero

Outsourced freelancers on your project.

3

In-house departments, covering design, Webflow development, and SEO.

20+

Senior team members. The people who run your tests are the ones in your Slack channel.

OTHER SERVICES

Other Services

Webflow Development

SEO Services

Integrations

Webflow Maintenance

Web Design

What is Webflow Optimize, and does Webflow support A/B testing natively?

Yes, through Optimize, Webflow's own tool to run experiments. Our team or yours can create variants in the Webflow Designer. It runs A/B tests with a winner picked by statistical significance, redirect tests, rules-based personalization for audience segments, and an AI-optimized split. Those variants can't change CMS content, interactions, the order of sections, or the page structure. On non-Enterprise plans it is a paid add-on that Starter and Ecommerce site plans can't take. Enterprise plans can often include it.