
From the conversion glossary
Concepts referenced in this article, defined.
Discover why CustomFit.ai is a superior choice over Optimizely for A/B testing. Explore features like ease of use, real-time personalisation, and affordable pricing that make CustomFit.ai ideal for businesses seeking impactful and agile testing.

Concepts referenced in this article, defined.
Run rigorous A/B tests and personalize every visit on Shopify or any storefront โ no engineers required.
A/B testing has become central for companies trying to improve website efficiency, lift conversions, and improve the overall user experience. Comparing two of the better-known A/B testing platforms, CustomFit.ai and Optimizely, each has its own capabilities for different user types and business needs. This article covers the main differences between the two and explains why CustomFit.ai might be the better option for your business.
CustomFit.ai:
CustomFit.ai is a good option if speed, ease of use, and accessibility are your priorities. It lets businesses run tests quickly and effectively, regardless of technical skill.

Optimizely:
Optimizely also has a capable visual editor, but its setup is often more involved, especially for advanced users or anyone building custom experiments. It works well for tech-savvy teams or companies with in-house developers, though setup can take more time and technical expertise.
Why CustomFit.ai?
If you value speed, simplicity, and accessibility, CustomFit.ai is a strong choice. It lets businesses run tests quickly and easily, regardless of technical skill.
CustomFit.ai:
CustomFit.ai does well with AI-powered personalisation. The platform does more than A/B testing; it lets you target audience segments with dynamic, tailored content based on user behaviour, device, location, and demographics. With this level of in-the-moment personalisation, each visitor gets a customised experience that lifts engagement and conversion rates.
Optimizely:
Optimizely offers personalisation too, though at a more complex level. It supports customised experiences, but its main strengths are experimentation and enterprise-level functionality, which often make it a better match for larger businesses with the resources to manage that customisation.
Why CustomFit.ai?
It blends real-time personalisation with simplicity for businesses focused on building customised experiences for different audience segments. That makes it a good fit for eCommerce, SaaS, and DTC brands.
CustomFit.ai:
It focuses on A/B testing and split URL testing while offering deep personalisation. Its simplicity doesn't cost it flexibility: businesses can run targeted experiments on landing pages, headlines, calls-to-action, and more. It's best for companies that want high-impact, short-term tests without complex configurations.
Optimizely:
Optimizely offers a wider range of testing options, including multivariate testing (MVT) and server-side experiments, which suits enterprise users who need more complex, large-scale testing. That range can be a lot for businesses that don't need it.
Why CustomFit.ai?
For companies that value simplicity, agility, and fast optimisation, CustomFit.ai's focus on quick, high-impact A/B testing with personalised variations is a real advantage.
CustomFit.ai:
CustomFit.ai provides real-time analytics and AI-powered suggestions through an easy-to-use dashboard for instant performance tracking. Its AI flags top-performing variants and offers actionable insights, which helps marketers make data-driven decisions without sifting through complex data sets.

Optimizely:
Optimizely provides more detailed analytics, including session recordings, heatmaps, and other advanced features. That depth is valuable for larger enterprises, but it can be more than businesses that just want quick insights and simple analytics need.
Why CustomFit.ai?
For businesses that need real-time, actionable insights to make quick decisions, CustomFit.ai's lightweight analytics dashboard and AI-driven suggestions provide speed without sacrificing impact.
CustomFit.ai:
CustomFit.ai does well with targeting and segmentation, letting businesses personalise experiences for specific user groups based on demographics, user behaviour, and other criteria. That means each visitor sees the most relevant content, which improves conversion rates.
Optimizely:
Optimizely offers strong segmentation tools, but its strength lies more in broad, enterprise-level testing. It supports audience targeting yet focuses less on smooth personalisation than CustomFit.ai.
Why CustomFit.ai?
For companies that need tightly focused, segmented A/B tests that deliver personalised content to specific user groups, CustomFit.ai's emphasis on personalised testing for targeted audiences gives it the edge.
CustomFit.ai:
CustomFit.ai is built for speed and efficiency. Its quick setup lets businesses run tests and see results faster, which suits companies that rely on rapid iterations and agile testing.
Optimizely:
Optimizely's infrastructure is built for enterprises running large-scale, complex tests. That helps teams doing extensive experimentation, but the platform can feel too heavy for smaller businesses or anyone who wants faster test execution.
Why CustomFit.ai?
For companies that value agility and need fast results, CustomFit.ai's lightweight platform delivers quicker test execution without compromising performance.
CustomFit.ai:
One of CustomFit.ai's main advantages is affordable pricing, which keeps it accessible for businesses of all sizes, from startups to larger enterprises. Its competitive pricing provides strong value, especially for companies that want a cost-effective solution covering both A/B testing and personalisation.
Optimizely:
Optimizely's broad toolkit comes at a higher price point, which suits large enterprises with bigger budgets. It offers many features, but smaller businesses may find it too costly for routine A/B testing.
Why CustomFit.ai?
For businesses that want a more budget-friendly solution with solid A/B testing and personalisation features, CustomFit.ai offers the best balance of cost and performance.
Both CustomFit.ai and Optimizely are capable A/B testing platforms, but they suit different users and business needs.
CustomFit.ai is a good fit for businesses that want simple, fast, personalised A/B testing with AI-driven personalisation and real-time insights. Its affordability and ease of use work for small businesses through large enterprise organisations, as well as eCommerce, SaaS, and DTC businesses that need quick iterations and impactful tests.
Optimizely, with its advanced experimentation capabilities, is a strong choice for enterprise organisations that need multivariate testing, large-scale experiments, and in-depth analytics. Its complexity and higher cost may be too much for businesses that need a more agile, cost-effective solution.
In the end, CustomFit.ai is the better platform for companies that want to optimise their websites efficiently, without the technical complexity or high costs often tied to more enterprise-focused platforms like Optimizely.
Ready to optimise your Shopify store through personalised A/B testing? Download the CustomFit app today and start running experiments to increase conversions, engage customers, and drive growth, all without code. Click here to get started now.
Can CustomFit.ai integrate with popular eCommerce platforms?
Yes. CustomFit.ai integrates with platforms like Shopify, WordPress, and WooCommerce, which makes it easy to personalise and optimise your website.
Does Optimizely support multivariate testing?
Yes. Optimizely offers multivariate testing in addition to A/B testing and server-side experiments.
Which platform is easier for non-technical users?
CustomFit.ai is built for non-technical users, and its no-code interface makes it approachable for marketers and business teams.
Does CustomFit.ai offer real-time personalisation?
Yes. CustomFit.ai does well with real-time personalisation, letting businesses tailor user experiences based on real-time data.
Which platform is more affordable for small businesses?
CustomFit.ai's pricing is more accessible for small and large businesses, while Optimizely is more expensive and caters to larger enterprises.
Does CustomFit.ai require coding knowledge for A/B testing?
No. CustomFit.ai is a no-code platform, so you can set up and run tests without technical expertise.