Carzo.com
Car shopping engine
Find new and used cars, explore your options and connect with dealers.
Built for
real questions.
The next car. A tax question. The compute behind your next build. Our brands bring useful tools to the decisions and work that matter.
Explore our brands
TaxMath.org
Everything Tax
Explore tax calculators, state comparisons and the explanations behind the numbers.
DiscountRunners.io
Cloud compute for agentic development
Managed compute for the builds, tests and checks behind the development loop.
From Bird Rock TradingSmall teams.
Small teams.
Useful things.
We build software around problems we understand. Each brand has its own focus, audience and experience, with the same belief that small teams can do huge things.
About Bird Rock