Had COVID - 19 symptoms in the last 2 days? Apply here to help us make testing accessible to all.

Saliva antigen tests for COVID-19

Our KnowNowᵀᴹ tests are a UK made infectiousness test for COVID-19. They work with patented technology to deliver true infectiousness results in under 15 minutes with just a saliva sample.
Works in 15 minutes

Know if you are currently infectious with COVID-19 in under 15 minutes with no other epuipment.

Accurate and sensitive

Our unique approach makes our test both accurate and sensitive, both in the lab or in the real-world.


Designed for scale our tests are easy to administer accurately and painless to receive.

True infectiousness test

Our tests only detect people with an active, infectious COVID-19 infection.

Equipment free

Can be used anywhere with no other equipment. The most accessible platform to house our assay technology.

Apply for a pilot of our KnowNowᵀᴹ screening

We are currently running pilots with partners across the UK so that we can provide the most efficient solution to companies' testing needs.

If you are interested in running a pilot with us please fill in the form and we will be in touch shortly.

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