Tools for developers, data people and small teams.
Biz59 LLC is a small company in New York. We build and run eleven products, most of them with one sign-in, and we write about what we see in software, AI and startups.
A database client, plus free data tools in the browser.
iPaid, i Owe: track what you owe and what is owed to you.
Security tools for small sites and teams, with one sign-in.
Short links, QR codes and page-view tracking.
An email router for apps, developers and bots.
Privacy policies, terms and consent records for apps and sites.
Website, policies, support pages, sign-in and cloud sync for your mobile app.
Offline-first cloud sync for your app's data, with sign-in for your users built in.
Our build agent: describe your app in a chat and watch it get built. Coming soon.
A whiteboard that also draws the diagram from your outline.
Markdown notes and documents that look good on screen and on paper.
More articles
When the AI feature eats the margin: gross margin for a SaaS that calls a model
Every use of an AI feature costs the vendor money, and a tenth of the customers can take most of the margin. A worked example for a small SaaS at $30 a month, what prompt caching, a cheaper model, caps and usage pricing do to it, and how investors read AI gross margin in 2026.
What five developers spend on AI coding tools in a month, and how a small team caps it
Copilot, Cursor and Claude now charge a seat plus usage, and one developer running agents can be most of the bill. Current list prices, a month for an illustrative team of five, the caps each vendor offers and what happens when you hit them, and how to tell the founder what the spend bought.
Raising prices on customers you already have: how a small SaaS decides, writes the email and keeps them
What Slack, Atlassian and Unity did when they raised prices, and what a small software company can copy: who pays the new price and from when, how many customers you can afford to lose, the notice the law and your terms require, who to call first, an email that says it plainly, and how to measure it a quarter later.