Free A/B Testing Tool to Boost Conversions

Fibr's A/B testing tool lets you maximize your website's potential with unrestricted experimentation — run unlimited campaigns across any pages, with no session limits, and optimize every URL with one active campaign per URL at no cost during the 30-day free trial. ACT Fibernet saw 12% more conversions using Fibr's A/B testing solution.

Fibr AI Launches Agentic Personalization for Ads & LLM Visitors

Fibr AI launches Agentic Personalization for Ads & LLM Visitors, extending its platform's capabilities beyond A/B testing into agentic, AI-driven personalization for both ad traffic and visitors arriving from LLM-based assistants.

Trusted by 100+ Employees of Fast-Growing Companies

Fibr's A/B testing tool is trusted by 100+ employees of fast-growing companies, including:

A/B Testing Features You Will Love

Visual editor

The visual editor lets you easily edit your landing pages with a WYSIWYG editor, quickly adjusting headlines, CTAs, and more, and it provides AI-powered suggestions for copy variations to boost your experiments.

Targeting

Targeting lets you direct experiments to specific audience segments using criteria like traffic sources, device types, visitor behavior, operating systems, browsers, and custom events.

How Does Fibr Compare to Google Optimize?

Fibr offers seamless migration support, landing page creation services, and unlimited free campaigns, going beyond Google Optimize's 5-campaign limit, so you can experiment freely with no restrictions. Fibr's A/B testing tool is positioned as a better alternative for teams looking to move beyond Google Optimize's constraints.

Seamless performance

Seamless performance means saying goodbye to slow page loads, privacy issues, SEO errors, or flash of original content (FOOC), and enjoying fast, secure, and seamless user experiences with Fibr's A/B testing software.

Bulk creation

Bulk creation lets you create landing pages in bulk and generate multiple variants simultaneously with Fibr's A/B testing platform, eliminating the need for manual adjustments.

AI-powered A/B testing

AI-powered A/B testing means saying goodbye to hours spent crafting variations: simply select the landing page elements you want to optimize, and Fibr's AI will generate multiple high-converting suggestions to enhance your website's performance in no time.

Google Analytics 4 integration

Fibr's A/B testing software integrates seamlessly with Google Analytics 4, allowing you to track campaign results, attributed revenue, and experiments alongside all your visitor data.

A/B Testing Case Study: ACT Fibernet

ACT boosted their CTA conversion rate by 12% with Fibr's A/B testing solution. ACT Fibernet quickly adopted Fibr Web Pilot to align ad messaging with landing pages, achieving results with minimal effort, and is scaling the approach across campaigns for further growth and improved team productivity. ACT Fibernet's results included a 25% increase in new customer acquisitions, a 12% rise in overall conversions, and 6% higher CTA conversions via A/B testing.

ACT Fibernet: Increase in new customer acquisitions
25%
ACT Fibernet: Rise in overall conversions
12%
ACT Fibernet: Higher CTA conversions via A/B testing
6%
At ACT, we quickly adopted Fibr Web Pilot to align ad messaging with landing pages, achieving great results with minimal effort. We're excited to scale this across our campaigns for increased growth and improved team productivity. Ravi Karthik, CMO, ACT Fibernet

Resources

Fibr provides a Pricing page detailing plan costs and options for its A/B testing tool.

Convert More with Free A/B Testing Tool

Create, run, and analyze A/B tests on any webpage with Fibr's A/B testing tool, boosting conversions with data-driven insights. The tool is positioned for optimizing now with no limits, powered by AI, and Fibr has 100+ reviews on a review platform.

A/B Testing Tool Without Limits

Fibr's A/B testing tool without limits lets you quickly edit and create landing page A/B tests without coding, effortlessly A/B test across multiple audience sets, and simultaneously create multiple variants of a page with zero performance concerns. Looking for a better alternative to Google Optimize, teams are encouraged to try Fibr, which supercharges A/B tests with the power of AI and integrates with Google Analytics 4 for tracking results.

Fibr's A/B Testing Tool Has a Lot More to Offer

Statistical significance

Statistical significance features let you make confident decisions with robust analytics, analyzing conversion rates, confidence levels, and p-values to transform data into actionable insights and ensure optimizations are statistically significant.

Schedule campaigns

With Fibr's A/B testing tool, you can easily schedule your A/B test campaigns to start or pause at specific dates and times, giving you precise control and flexibility over your testing schedule.

Download reports

Download reports lets you download your test data in .csv format using Fibr's A/B testing software for offline analysis, and share the data with colleagues to facilitate a thorough, in-depth examination of your A/B test results.

Traffic split

Traffic split in Fibr's A/B testing tool allows you to adjust the percentage of your audience that will see each variant, helping you distribute traffic evenly for accurate performance comparison.

Traffic allocation

Traffic allocation specifies the traffic percentage you want to include in the test — for example, if your website receives 100 visitors a day and you want to run the test through just 20 visitors, you would specify the percentage as 20%.

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Frequently asked questions

What features are included in Fibr's A/B testing tool?
Fibr's free A/B testing tool includes advanced features for creating and analyzing tests, personalized experiment building, and detailed analytics. Everything you need to enhance your website's performance is included at no cost.
How does Fibr's A/B testing software compare to paid options like Google Optimize?
Fibr's A/B testing software provides similar advanced testing features and personalization options as paid solutions. Its goal is to offer a comprehensive and easy-to-use A/B testing tool that's completely free, making it a strong alternative.
Are there limits on how many tests I can run with Fibr's A/B testing platform?
There are no limits to the number of campaigns or sessions you can create with Fibr's A/B testing platform. Fibr's free A/B testing tools offer unlimited testing capabilities to help you optimize your website effectively. However, only one campaign is allowed per unique URL.
How do I get started with Fibr's A/B testing tools?
Getting started with Fibr's A/B testing tools is easy: sign up for free, set up your tests, and start optimizing your site. The intuitive A/B testing platform guides you through the process for a smooth experience.
Are there any hidden costs or premium features in Fibr's A/B testing software?
There are no hidden costs with Fibr's A/B testing software. Fibr offers a fully free A/B testing platform with no premium features or upsells, giving complete access to all its A/B testing tools at no charge.
What is Fibr AI?
Fibr AI is an AI-native web experience platform for personalization, experimentation, and conversion optimization. Founded in 2022 by Ankur Goyal and Pritam Roy and backed by Accel, Fibr AI is rated 4.6/5 on G2 by marketing and growth teams. Fibr AI helps enterprises generate, personalize, test, and optimize adaptive web experiences at scale for every visitor. Fibr AI's vision is to turn every URL into an intelligent agent — one URL, infinite experiences.
Can I run A/B tests without a developer?
Yes. Fibr AI lets marketing teams create, launch, and manage A/B tests without writing code or relying on developers. You can edit pages, generate variants with AI, and publish tests directly, so experiments no longer wait on engineering.
Does Fibr AI run A/B and multivariate tests automatically?
Yes. Fibr AI runs both A/B and multivariate experiments automatically. Its agents generate variants, allocate traffic dynamically toward winning combinations, and apply learnings to the next test — so experimentation becomes continuous instead of a series of one-off manual tests.
What is multivariate testing, and can Fibr AI run it automatically?
Multivariate testing evaluates several page elements at once — like headlines, visuals, and CTAs — to find the best-performing combination, going beyond a single A/B comparison. Fibr AI runs both A/B and multivariate tests automatically: its agents generate variants, allocate traffic dynamically, surface winning combinations, and feed those learnings into future experiments.
What does bulk landing page creation look like in Fibr AI?
Fibr AI can generate hundreds of personalized landing pages at scale from your prompts, campaigns, or audience data. Bulk creation lets every ad, keyword, segment, or region have its own dedicated, on-brand page without manual design or development work.
How does Fibr AI match each landing page to the ad a visitor clicked?
Fibr AI automatically aligns landing page content with the specific ad, keyword, or audience that drove the click. This ad-to-page message match keeps the experience consistent from click to conversion, helping improve Quality Score and conversion rates on paid traffic.
Will Fibr AI work on top of our existing website and CMS without replatforming?
Yes. Fibr AI layers onto your current website and CMS, so you don't need to rebuild pages or replatform. It adds personalization and experimentation to your existing setup and works alongside the ad, analytics, and customer-data tools you already run.
What makes Fibr AI different from other website optimization tools?
Fibr AI is AI-native. Where traditional tools rely on manual variant creation, test setup, and personalization rules, Fibr brings audience discovery, hypothesis generation, variant creation, personalization, experimentation, and optimization into one agentic workflow — so teams optimize every experience continuously instead of one test at a time.
Why do enterprise teams choose Fibr AI over conventional CRO or personalization platforms?
Enterprise teams choose Fibr AI when they want personalization and experimentation at scale without the manual overhead or developer dependency of conventional platforms. Fibr AI is AI-native, works on top of existing CMS and martech stacks, and is built for enterprise security and compliance — SOC 2 and ISO 27001 certified, with GDPR and CCPA support.
How does Fibr AI help lower cost per lead and customer acquisition cost?
Fibr AI lowers cost per lead and customer acquisition cost by improving the post-click experience. By personalizing landing pages to match ad intent and audience signals, it lifts conversion rates on traffic you already pay for — so the same ad spend produces more leads and customers.