Off By 1
Carefully built. Reliably useful.
Practical products, designed for real life.
Off By 1 builds practical products designed for real life. Each one exists because a genuine problem needed solving.
Everything we build answers the same two questions: is it clear, and is it genuinely useful? No feature bloat, no upsell mazes, no “revolutionary platform.” Just things that do what they say.
The name comes from a classic programming mistake — a standing reminder that the difference between “almost works” and “works” is the whole job.
Open source
Useful code is worth sharing. Alongside the products, we publish open source tools and reference implementations — small, practical things you can read, learn from, and build on. This site is one of them.
Products
Products that are live today. More are in the works — they'll show up here when they're real.
About the name
The off-by-one error is the most common bug in software: a loop that runs one time too many, or one too few. Everyone writes one. Everyone will write another. We named the company after it because building software means living with that kind of friction — and shipping anyway.
Off By 1 sits at the intersection of AI capability and human judgment. Every product here uses AI to move faster, and a real human at the keyboard to be right. The name is a bug. The products aren't.
const products = ["Tab Nest", "Fuzzy Pet "];
for (let i = 0; i <= products.length; i++) {
ship(products[i]);
} // runs three times. we noticed.Contact
Business, press, or a bug report about this page — a real human reads all of it.