From Mike Samuel · Creator of Google Calendar

Trust the build, not the review.

Temper is a new layer beneath the languages a system runs on. It keeps behavior identical across all of them, and makes whole categories of vulnerability impossible to write.

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§ 01The thesis

What if entire categories of mistakes simply couldn't be made?

One semantic model

Describe behavior, schemas, and policy once, in a form that has meaning independent of any target language.

II.

Every target runtime

Emit idiomatic, reviewable code in the languages a stack already runs, or migrate an existing system into one of them. Behavior stays identical, by construction.

III.

Secure by construction

Whole categories of vulnerability aren't flagged after the fact. They simply cannot be expressed.

One engine · two applications

The same engine secures AI-generated code and modernizes legacy systems in place. It works with today's AI tools where they help, and depends on none of them.

§ 02The founder

“The best fixes remove an entire category of mistake, so no one has to remember to get it right. Temper does that for the code itself.”

Mike Samuel, Founder & CEO

Mike SamuelFounder & CEO · 17 years at Google, Technical Infrastructure

CreatedGoogle CalendarBuilt the first frontend in 20% time. Now used by roughly 500M people a month.

DesignedGmail's XSS defenseContext-Sensitive Auto-Sanitization, the primary XSS defense across Google products.

ContributedW3C Trusted TypesMajor contributor to the standard that ends DOM-based XSS at the root. Native in Chrome 83+.

BuiltGoogle Code PrettifyThe syntax highlighter that powered StackOverflow for over a decade.

Supported10,000+ engineersOne of ten on Google's Common Infrastructure Team.

Honored2× Google's highest awardsThe Founders Award and the Outstanding Contributor Award.

§ 03Contact

We're speaking with a small group of partners.

Six years of compiler research, patents issued and pending. If there's a reason to talk, reach us directly.