Pays for itself with the first serious bug

HypoFuzz upgrades your testing workflow, from run-and-done to an ongoing search for bugs.
Ship faster without breaking things - or breaking the bank on your testing effort.


$99 / mo

Hypothesis helps you deliver reliable code. Save one hour, and HypoFuzz pays for itself.

Unlimited use for one user.

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$249 / mo

Works seamlessly across CI, shared fuzzing servers, and everyone's dev machines.

Unlimited use for up to 20 users.

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$999 / mo

What do you spend on testing every month? Smart fuzzing can move the needle.

Unlimited use for up to 250 users.
( get a quote for larger enterprises)
Concierge onboarding.

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We also offer a range of custom services to complement the HypoFuzz subscription:


As core developers of Hypothesis, we can help improve your testing at every stage from planning, to implementation, to code review - and that boosts developer productivity as well as the effectiveness of regression testing and fuzzing.


Zac often speaks at conferences, and can deliver anything from seminars to intensive one-on-one mentoring. Get in touch to discuss customised training for your team.


Our standard plans do not include an SLA for email support, or third-party source code escrow. If these services are important to you, contact us for a quote.


If you would like to use HypoFuzz on an open source or research project, please contact us for a noncommercial license.