FAQ
What Lambrary needs, where your documentation lives, and what (if anything) leaves your computer. If something isn't covered here, email hello@lambrary.com.
Windows desktop Excel only (not Mac, Excel on the web, or mobile), and it needs LAMBDA support: 64-bit Microsoft 365 or Excel 2024. Excel 2019 and 2021 don't have LAMBDA, so there's nothing for it to work with there. If you're on 32-bit Excel, email support@lambrary.com; a 32-bit build exists, but it isn't part of the beta.
Your documentation is stored inside the workbook itself, as hidden defined names, so it travels with the file and works for others without Lambrary. The add-in makes a network call in only two cases: an optional once-a-day check for a newer build (a plain fetch of a small file, no usage data sent, and you can turn it off), and when you click Share or Import from link, which uploads the selected LAMBDA(s) to lambrary.com. The diagnostic log records only counts and structural flags, never your formulas, names, or data.
Not during the beta, so Excel or Windows may warn about an unverified publisher. When that happens, choose "Run anyway" or "Trust".
It's a free closed beta right now, and I haven't settled on a pricing plan yet. My loose vision is that Lambrary stays free for personal use, with paid licensing for enterprise use further down the line. None of that is set in stone.
I'm Jeremy Freelove, and I built Lambrary to solve a problem I had myself. I maintain a large library of named LAMBDA functions for competitive Excel esports, and Excel gives my custom functions none of the IntelliSense it gives its own. Native functions get argument hints and descriptions as you type, so why not the ones I write? I built it for myself, demoed it to friends in the Excel esports community, and the feedback was overwhelmingly positive, so I turned it into an add-in that everyone could use. Questions and feedback are welcome at hello@lambrary.com.
The install guide walks through it (about two minutes), and the guide covers a first session start to finish.