5 Best CRO Agencies for B2B SaaS Companies

Picture the visitors behind a single B2B SaaS deal. An operations manager finds the site through a search and reads two product pages. A week later, her director arrives from a LinkedIn post and goes straight to pricing. Someone from IT opens the security page and the integrations list. Finance looks at a customer story. The manager comes back three more times before anyone fills in a form, and when the demo request finally arrives, it is submitted by someone the analytics have never seen before.

Most conversion advice is written as though one person arrives, decides, and converts in a single visit. That is how online shops work, and it is how many CRO tools report results. B2B SaaS rarely works that way. Purchases involve several people, several visits, and weeks of quiet research, and the website has to persuade each of them in turn, often without knowing who they are.

After analysing conversion data across more than 200 B2B SaaS accounts, the websites that convert best are seldom the ones with the cleverest landing page tricks. They answer each member of the buying group's questions clearly, make the next step obvious to whoever is ready to take it, and treat a return visit as progress instead of a failure to convert.

CRO agencies vary greatly in how well they understand this. This guide compares five that work with B2B SaaS companies, and explains which kind of conversion problem each is best placed to solve.

Why B2B SaaS Conversion Is a Group Decision

Four features of B2B SaaS buying change what conversion optimisation has to do.

Several people, several questions. The person who will use the product wants to know whether it solves their problem. Their manager wants to know whether it is worth the cost. IT wants to know whether it is secure and will integrate. Finance wants to know what it will really cost. A page that answers only one of these persuades only one of them.

Conversions are spread over time. A single buyer may visit five or ten times before acting, and the eventual form may be filled in by a colleague. Measuring a page by whether a visitor converted in that session understates what it contributed.

Small numbers, high values. Many B2B SaaS sites have modest traffic and few conversions, but each one may be worth tens of thousands in annual revenue. That changes which methods work: classic split testing struggles to reach reliable results, while research and well-reasoned redesigns often deliver faster.

The conversion is only the start. A demo request or trial signup is valuable only if it becomes a qualified opportunity. A change that raises form submissions but attracts poor-fit leads can make the sales team's results worse.

The agencies below deal with these features in different ways. Some are strongest at the page itself, some at the psychology behind decisions, and some at connecting conversion with what happens before and after it.

The Pages That Carry the Most Weight

On most B2B SaaS sites, a handful of pages do most of the persuading. A good CRO agency will look at these first.

Pricing. Often the most visited commercial page, and frequently the most confusing. Buyers want to know roughly what they will pay, which plan fits them, and what happens if they grow. Hiding prices entirely can push serious buyers to competitors who are clearer.

Demo request or contact. The point where interest becomes a sales conversation. Long forms, unclear next steps, and no indication of what the demo involves all cost conversions. So does asking for a meeting before the buyer is ready.

Comparison and alternatives pages. Buyers compare. Pages that honestly set out how the product differs from named alternatives help them build the case internally, and often attract high-intent search traffic.

Security, compliance, and integrations. Rarely seen as conversion pages, yet they often decide whether IT or procurement approve. Clear, findable answers remove late objections.

Customer stories. Proof from companies like the buyer's, with numbers, is what a champion forwards to colleagues. Weak or generic stories leave the champion to argue alone.

An agency that only optimises the homepage hero and the demo form is working on a small part of the decision.

How We Chose These Agencies

• B2B SaaS evidence: Published SaaS case studies, SaaS clients, or a stated SaaS practice.
• Method fit: An approach that works at the traffic levels typical of B2B SaaS.
• Coverage of the journey: Attention to pricing, demo, trust, and onboarding pages, not only the homepage.
• Quality of conversions: Some sign of concern for lead quality and revenue, not just conversion rate.
• Delivery: The ability to design and build changes, not only recommend them.

Each profile explains which kind of conversion problem the agency suits best.

The 5 Best CRO Agencies for B2B SaaS Companies

1. dimartec

Best for: B2B SaaS and fintech companies at €2M–€10M ARR whose conversion depends on who arrives, what they are told, and what happens after they act

dimartec builds Predictable Revenue Engines for B2B SaaS and fintech companies. Full-Funnel CRO is one of five connected pillars, with Performance Paid Media, GEO, Lead Gen & Nurturing, and RevOps & Automation. The CRO work covers funnel audits and diagnosis, landing page design, A/B testing and experimentation, user research and analytics, and tracking and configuration, with the aim of doubling the revenue earned from existing traffic.

The integrated model suits the way B2B SaaS buying works. Because dimartec also runs the paid campaigns, it can build pages for the specific roles and intentions those campaigns attract. Because it runs nurture, a buyer who visits pricing but is not ready to talk can be kept engaged instead of lost. Because RevOps tracks every lead into the CRM, conversion changes are judged on cost per SQL and lead-to-SQL rate, not on form submissions alone. AI search visibility through GEO also means more visitors arrive already familiar with the product.

Work typically begins with a free CRO audit of a key commercial page, delivered in three to five working days, or a two-to-four-week Diagnostic. The full Revenue Engine is built over six months, with first conversion tests running in the first two months, and handed over to the client's team with documented playbooks. dimartec's team has optimised funnels for more than 40 B2B SaaS companies, and reports a 24% average reduction in cost per SQL within 180 days.

dimartec suits B2B SaaS companies when:

• Paid spend is rising but conversion stays flat
• Pages convert but leads do not become opportunities
• Return visitors and buying groups are invisible in reporting
• Conversion, paid media, and CRM are managed by different people

Key services

• Full-Funnel CRO: audits, landing pages, testing, research, and tracking
• Performance Paid Media: campaigns matched to the pages they feed
• Lead Gen & Nurturing: keeping not-yet-ready buyers engaged
• RevOps & Automation: conversion measured through to pipeline
• GEO: more visitors arriving informed from AI search

Why dimartec stands out for B2B SaaS CRO

• Pages built for the traffic and buyers actually arriving
• Results judged on cost per SQL, not form fills
• Works at modest traffic levels
• Built only for B2B SaaS and fintech

Best fit: B2B SaaS companies where page performance cannot be separated from acquisition and lead handling.

2. Speero

Best for: Mid-market and enterprise B2B SaaS companies building a lasting experimentation programme

Speero is the experimentation agency associated with the CXL Institute, known for research-led testing, Bayesian statistics, and frameworks that client teams can adopt. Its clients have included Miro, eBay, Codecademy, and Monster. It combines behavioural research and heuristic analysis to decide what to test, then runs and documents experiments in a way designed to build internal capability.

For a B2B SaaS company with enough traffic to run experiments regularly, Speero offers one of the most rigorous approaches available, and its emphasis on research suits the multi-stakeholder questions B2B buyers bring.

Independent comparisons describe it as best suited to companies with significant traffic, and some note that it often recommends changes for the client's own team to build.

Key services

• Research and heuristic audits
• Experimentation strategy
• Bayesian A/B testing
• Programme design and training
• Analytics

Why Speero stands out for B2B SaaS CRO

• Highly respected methodology
• Research before testing
• Builds in-house capability
• Strong SaaS client record

Best fit: Larger B2B SaaS companies ready to make experimentation permanent. Smaller sites may need a research-led or integrated partner first.

3. Apexure

Best for: B2B SaaS companies that need high-converting demo and landing pages designed, built, and improved quickly

Apexure is a London-based conversion-focused landing page and CRO agency founded in 2015. It reports more than 3,000 projects and more than 800 A/B tests, with SaaS, fintech, healthcare, legal, and education as core verticals. It designs, builds, and optimises pages on any platform, uses its own EPIC framework to prioritise CRO work, and works without long-term contracts. Published B2B SaaS results include a 65% increase in demo conversions for cybersecurity SaaS company Flare.io after a redesign of its book-a-demo page.

For a B2B SaaS company running paid campaigns to demo or trial pages, Apexure's strength is speed of execution: strategy, copy, design, and development in one team, with pages built specifically for conversion. It holds a 5.0 rating on Clutch, where clients praise its responsiveness and the quality of its landing pages.

Its focus is the page and the landing experience. Companies needing deep buyer research, testing programmes at scale, or work on lead quality after the form should look for broader support.

Key services

• Landing page design and build
• Website CRO audits
• A/B testing
• Conversion copywriting
• Form and UX optimisation

Why Apexure stands out for B2B SaaS CRO

• Published B2B SaaS demo conversion results
• Design, copy, and build in one team
• No long-term contracts
• Platform agnostic

Best fit: B2B SaaS companies needing better demo and campaign pages fast. Less suited to full-funnel or programme-level work.

4. Convertize

Best for: B2B SaaS companies wanting behavioural science applied to their pages and onboarding

Convertize is a London-based CRO consultancy working across Europe and the US, advising on conversion since 2008. Its founders, Philippe Aimé and Jochen Grünbeck, wrote Smart Persuasion, a book on CRO and neuromarketing, and its approach combines analytics with behavioural psychology to reduce cognitive friction and ambiguity on a page. It offers CRO audits, landing page optimisation, SaaS onboarding work, and ongoing coaching. Its A/B testing platform was acquired by Glassbox.

For B2B SaaS, the behavioural focus is useful at moments of uncertainty: a buyer deciding whether to book a demo, a trial user deciding whether to continue, a finance reviewer deciding whether a price is justified. Convertize's SaaS onboarding work also addresses the stage after signup, which many CRO agencies leave alone.

Its published case studies lean towards ecommerce, so B2B SaaS buyers should ask for software examples.

Key services

• CRO audits and behavioural analysis
• Landing page and value proposition work
• SaaS onboarding optimisation
• Managed A/B testing
• CRO coaching and training

Why Convertize stands out for B2B SaaS CRO

• Grounded in behavioural science
• Covers onboarding after signup
• Coaching to build internal skills
• Long CRO track record

Best fit: B2B SaaS companies whose visitors hesitate at key decisions. Ask for SaaS-specific evidence.

5. The Good

Best for: B2B SaaS companies whose main conversion problems are usability and friction

The Good is a CRO and UX agency that bases its recommendations on user research: interviews, usability testing, behavioural analytics, and journey mapping. It tests where traffic allows and makes research-backed changes where it does not. It reports a 104% increase in trial starts for one SaaS client after rebuilding the signup journey, and has worked with software companies including Corel and Canopy.

For B2B SaaS, its research is especially useful for understanding why members of a buying group stall: a confusing pricing page, an integrations list that is hard to find, a signup flow that asks too much too soon. These problems are often obvious to real users and invisible in analytics.

It focuses on the site experience and is less involved in traffic quality or what happens to leads afterwards.

Key services

• User research and usability testing
• Conversion audits
• UX and journey design
• A/B testing
• Trial and signup optimisation

Why The Good stands out for B2B SaaS CRO

• Research works at low traffic
• Strong record on SaaS signup journeys
• Finds problems analytics cannot explain
• Clear, evidence-based recommendations

Best fit: B2B SaaS companies whose visitors struggle to complete the journey.

Why dimartec Approaches B2B SaaS CRO Differently

Each of the other four agencies is strong at part of the conversion problem. Speero brings rigorous experimentation. Apexure builds converting pages quickly. Convertize applies behavioural science. The Good uncovers usability problems through research.

What they share is a focus on the moment of conversion. In B2B SaaS, that moment is surrounded by things that decide whether it matters: which buyers the campaigns brought to the page, whether a visitor who was not ready gets another reason to return, and whether a demo request turns into an opportunity anyone can trace. An agency that improves the page but cannot see these things can raise the conversion rate and leave revenue unchanged.

dimartec treats the page as one part of a connected system. Full-Funnel CRO works with Performance Paid Media so pages match the audiences sent to them. Lead Gen & Nurturing keeps the rest of the buying group engaged until they are ready. RevOps & Automation follows every conversion into the CRM, so success is measured in qualified pipeline and cost per SQL. The system is built over six months and handed to the client's team to run.

See how the Revenue Engine works: https://www.dimartec.co.uk/services/revenue-engine

Three Things to Check Before Hiring a B2B SaaS CRO Agency

One: Ask which pages they would start with, and why. A good agency will want to see pricing, demo, comparison, and trust pages as well as the homepage, and will explain its priorities using your data. An answer that begins with button colours or hero images suggests a consumer mindset.

Two: Ask how they will judge success. Conversion rate alone can mislead in B2B SaaS. Ask whether the agency will report on qualified leads, opportunities, or cost per SQL, and how it will spot a change that brings more leads of lower quality.

Three: Ask what happens at your traffic level. If your key pages see a few thousand visitors a month, ask how long a typical test will take to reach a reliable result. Agencies that rely only on split testing may need many months; agencies that combine research and redesign can often move faster.

Frequently Asked Questions

How is B2B SaaS CRO different from ecommerce CRO?

Ecommerce usually involves one buyer making a quick decision in a single visit, with plenty of transactions to test against. B2B SaaS involves several decision-makers, repeated visits, fewer but more valuable conversions, and a sales process after the form. That makes research, page clarity for different roles, and lead quality more important than rapid split testing.

Can CRO work on a B2B SaaS site with low traffic?

Yes, but the method changes. With low traffic, research, expert review, and well-evidenced redesigns of key pages tend to deliver results faster than waiting for split tests to reach significance. Testing can follow as traffic grows.

Which pages should a B2B SaaS company optimise first?

Usually pricing, demo or contact, and the landing pages used by paid campaigns, because they sit closest to revenue. Security, integrations, comparison, and customer story pages often come next, since they remove objections from the wider buying group.

How should B2B SaaS conversion be measured?

Track form completion and conversion rate by traffic source, then follow conversions into the CRM: the share that become qualified leads and opportunities, and cost per SQL. Where possible, look at account-level engagement across visits, so that the contribution of earlier visits by the buying group is not missed.

Optimise for the Whole Buying Group

B2B SaaS conversion is rarely one person on one page. It is several people, across several visits, each looking for a different reason to say yes. The right CRO agency understands that, works at the traffic levels you actually have, and judges its work by the qualified pipeline it creates, not the forms it collects.

The Revenue Engine connects Full-Funnel CRO with Performance Paid Media, GEO, Lead Gen & Nurturing, and RevOps & Automation, so better pages turn into more revenue.

See how the Revenue Engine works: https://www.dimartec.co.uk/services/revenue-engine