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Wow, conversion rates DO matter!

We’re The Online Sales Company

The Online Sales Company are now re-branding as Proof Marketing - the full service Conversion Optimnisation experts

We’re a specialist consultancy, boasting a client list of global brands, that can help you realise more sales and leads from your website.

To us, you see, it’s all about results. If your website isn’t generating the leads/ sales you know it should be then you’ve come to the right place. We’re recognised as being among the world leaders in web ROI and conversion rate optimisation.

Do You Need Us?

Well, let’s ask that in another way: Do you want to convert more of your website visitors into leads or sales?

Okay, so that’s a loaded question! Of course you want to increase the number of leads/ sales coming through your site, but do you need our skills to help with that?

There are many reasons why visitors to your website don’t become a lead or a customer - and most of them are about your website and it‘s structure, rather than the fact that your “gut instinct’ on what to do is wrong.

This is where we can help. We can...

  • Identify why your website or approach is wrong and then help you put it right
  • Test what needs testing
  • Actually interpret your analytics to get out the messages the data is telling you
  • Really understand your visitors and build a web experience that’s right for them
  • Create the right ‘persuasion path’ that guides the user through to conversion
  • Help your marketing to drive extra ROI

Scary fact 1: 70% of your prospects won't talk to you before they've drawn up their shortlist. Source: Manticore

Still don't know if we can help? Take the quick test to find out >>

What do we actually do?

Conversion rate optimisation, analytics, landing page design, PPC, customer journey planning, SEO, split testing, usability and damn good project management

We're a digital agency - with one major difference from our peers: everything we do is centred around conversions. Yes, we do all the normal agency things: great design, coding, strategic input, SEO, PPC and so on. So do lots of companies.

What makes us different (and it's why our range of clients stay with us year after year) is that we don't care about awards, fancy offices in Soho or any of that: we believe, absolutely 110%, that we have a responsibility to turn our clients marketing investment into an increase in their sales. They pay us £X, we make them £X time 10 in return.

We are a strategic team that can be called upon whenever you need - some people just use us for a project or two, others have retained our services for several years to help hit long-term commercial goals.

However, all of our clients have several things in common: firstly, they know that they need to access and use the data on their website users better to deliver a web experience that will increase sales. Secondly, they need the cohesive expertise in all the skills that contribute to Conversion Rate Optimisation to really make a difference. Finally, they are serious about improving conversions, willing to invest the time and money involved in doing this right.


  • Conversion Rate Optimisation
  • Analytics Insight
  • Landing Page Design
  • PPC Management
  • SEO
  • Customer Journey Planning
  • Split-Testing
  • User Experience Audits

Our Clients

We are fortunate to work with a mixture of global brands and exciting start-ups. Click on the logos below to see what we did...