SEOTesting is a search engine optimisation testing and reporting platform built to help SEO professionals make data-led decisions. It is developed and maintained by SanityCheck.io Limited, a small, independent company founded in 2017 and based in Bude, Cornwall.
Our mission is straightforward: give SEO professionals, agencies, and in-house marketing teams the tools they need to test changes, measure results, and report outcomes with confidence – without hours of spreadsheet work.
SEOTesting was originally launched as SanityCheck in November 2016 as a basic SEO tool built to solve a simple but frustrating problem. At the time, Google Search Console only gave you access to three months of data. The first version simply archived that data using the Search Console API so you had more to work with.
Over time, and through close conversations with our users, the product grew. We added time-based SEO testing, SEO split testing, and a library of pre-built reports to help teams act on real performance data rather than gut instinct.
As the product evolved, so did our identity. In April 2020, we rebranded SanityCheck to SEOTesting and fully repositioned around what the tool had always been best at – helping SEOs test what works, prove what changes, and report it clearly. SEOTesting integrates with Google Search Console and Google Analytics, enabling users to run time-based SEO tests, SEO split tests, and LLM visibility tests on websites so that they can make data-led decisions, improve search rankings, increase organic traffic, and prove the value of SEO to stakeholders. SanityCheck.io Limited remains the legal entity behind the product.
Today, SEOTesting is trusted by SEO professionals, digital agencies, ecommerce teams, and in-house marketers around the world. We are proud to be an independent, bootstrapped product, built by a small team who genuinely care about SEO.
We are a team of three passionate SEO professionals. Every support reply, every new feature, every guide and tutorial – it all comes from one of us. If you have a support question, feature request, demo request, or even just a general SEO question, you’ll hear from someone on our core team – Nick, Faith, or Vicky. We write the code, support our users, document the product, and share SEO knowledge across the community. We believe in building useful tools, staying close to our users, and helping people get results.

Nick Swan is the founder of SEOTesting and the driving force behind the product. He designs and builds new features, supports customers, writes product documentation, and publishes SEO guides. Nick has been working in SEO since the days of AltaVista and Excite, and he founded SanityCheck.io Limited in October 2017 to turn what had started as an internal tool into a product the wider SEO community could use. He is passionate about making SEO measurable and proving that data-led decisions beat guesswork every time. When he is not working, Nick manages the local Under-14 Girls’ Football Team in Bude, spends time with his family, and can occasionally be found parked up somewhere scenic in his campervan. He also hosts the SEOTesting Podcast, where he discusses SEOTesting product updates, and the ups and downs of boostrapping a SaaS SEO tool.
Connect with Nick on LinkedIn, X or email him at nick.swan@seotesting.com
Find out more about Nick here.

Faith keeps SEOTesting running and growing. As a developer, she is happiest when she is building tools that genuinely make life easier for the people who use them and she brings that same focus to every feature she works on. Outside of work, she enjoys baking and exploring places off the beaten track.

Vicky is the person most likely to be on the other end when you get in touch. She handles customer support and keeps the day-to-day operations of the business running smoothly. Vicky takes genuine pride in making sure every customer gets a helpful, human response. Away from work, she enjoys cooking, walking her dogs, and cheering her children on from the sidelines of a football pitch. You can reach her at vicky@seotesting.com or connect with her on LinkedIn.
You may come across references to SanityCheck or SanityCheck.io in older content around the web. This was the original name of the product before we rebranded in April 2020. The legal entity – SanityCheck.io Limited (company number 11023704, registered in England and Wales) – has remained the same throughout. SanityCheckio Limited was founded by Nick Swan in October 2017 in Bude, Cornwall, UK.
If you are a charitable organisation, we are happy to offer you a free subscription to SEOTesting.
While Nick’s daughter was undergoing treatment for Leukaemia, his family was hugely helped by a number of great charities and organizations. This is a small way of being able to give back to charities that are helping other people.
If you work for a charity, and would like to take this offer up, please drop an email to hello@seotesting.com.
You can download our logos from this link: https://seotesting.com/logos.zip
Our registered office address is:
SanityCheck.io Limited
The Hive
15 Efford Farm Business Park
Bude
Cornwall
EX23 8LT