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About

We got tired of being on bridges.

We built Stag to help teams make safe changes, prevent incidents, and get back to the work, and life, they planned.

Why we built Stag

“Before Stag, several of our founders ran backend data platforms and AI infrastructure at Tesla.”

We built security and observability platforms. We had testing, reviews, and procedures. And still, small, quiet changes kept creating loud incidents.

After a major incident, an engineer trolled our CEO to "stop all the dumb things from happening". That seemingly impossible request stuck with us. We realized to do it we needed to see many moves ahead. We needed simulation.

Making simulation practical and cost efficient at scale took a breakthrough in mathematics and computer science. That work became Stag: a way to see what a proposed change could affect, understand why, and get guidance on making it safely.

Simulation is going to change the way that people, and agents, work. And we’re just getting started.

What We Believe

  • [01]

    Simulation is the missing link in IT

    Teams and agents should be able to explore every change’s consequences before having to experience them. This isn’t just for the big projects: we’re making simulation practical for every change, every day.

  • [02]

    Tech debt is a feature. Not a bug.

    There is a point where best practices meet reality. Real infrastructure comes with history, trade-offs, and unexpected dependencies. We evaluate changes in that context, not against an idealized environment or a generic picture of what “good” should look like.

  • [03]

    Your time outside of work matters. You, as a person, matter.

    The cost of an incident includes the sleep, weekends, and family moments it takes away. Helping teams protect that time is part of why we built Stag.

  • [04]

    The “Why” matters.

    Knowing whether or not a change is safe is only a starting point. Teams need to understand what’s affected, why it matters, and how to make safe changes within the context of their greater environment.

Who we are

Meet the people behind Stag

We've built and operated some of the world's largest systems

  • YouTube
  • Tesla
  • Uber
  • Akamai
  • Pandora
  • Zenefits
  • Red Lambda
  • LendingClub

And the team building it

Our investors and advisors

  • John Cowgill, Partner at Costanoa Ventures
    Costanoa Ventures

    Partner

    John Cowgill

Let’s make safe changes.

See what your next infrastructure change could affect before you make it. Want to help us build Stag? We’d like to hear from you.

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