Find your fit

Partner with Jack to make sperm testing easier to access, easier to talk about, and easier to act on.

Regulated and certified

Our kits are registered as In Vitro Diagnostic Medical Devices with the MHRA and UKCA marked.

Tested in our own Oxford lab

Every sample is analysed at Jack’s CL2 laboratory at the Wood Centre for Innovation in Oxford.

Built for data protection

ICO registered and built around UK GDPR, so customer data is handled carefully from the start.

We’re interested in the right partners, not just the obvious ones. Tell us what you’re working towards, who you’re trying to help, and let’s talk about how Jack can support you.

Employee benefits & wellness

A practical way to bring male fertility to employee benefits. A strong complement to existing female fertility offers, with a private and affordable from-home testing option.

Offer it

Longevity & health optimisation

Sperm is one of the most underutilised biomarkers of health. Jack makes it easy to add to any longevity panel, health MOT or optimisation programme.

Add it

Retail partners & B2C resellers

The only postbox Sperm Test on the market. Straightforward fulfilment with no cold chain. Built around a tried-and-tested workflow, not clinical logistics.

Stock it

Wellness practitioners & coaches

Give your clients a measurable baseline. A Jack Sperm Test before, during and after a lifestyle programme turns your coaching into progress they can see.

Recommend it

Researchers & academics

Nationwide reach. Collect semen parameter data without clinics or scheduling headaches. Flexible enough for bespoke studies and wider R&D work.

Study it

Healthcare providers & clinics

A lab-based test that does the groundwork before patients arrive. Useful sperm health data and a clinician-ready PDF, without using clinic time.

Refer it

Not seeing yourself here?

Not every partnership fits neatly into a category.


Maybe you offer something our users would value after they test. Maybe you have an audience we could genuinely help. Maybe you see where sperm health is heading and want to build something with us.


The best partnerships tend to run both ways, so chat to us about what you’re working on.

Tell us what you’re building

Giving back

We built Jack to make sperm testing easier to access, but we know price still puts it out of reach for some people who need it most.

If you work with a charity, community group, or organisation where sperm testing could have real impact, we’d love to hear how we might be able to support you.

Talk to us