ThinkBigger is a desktop app that turns the AI you already pay for into someone who does the work: documents, budgets, websites and apps, made in front of you.
Mac and Windows. Works with Claude and ChatGPT.
What it makes
Letters, contracts, invoices and reports as real document files, edited in place when you change your mind.
Budgets, trackers and lists with working formulas, in a grid you can type into.
See a working design first, pick with your eyes, then have the real thing built.
Compress, split, merge and convert PDFs and photos. Done for you, originals untouched.
How it works
Ask the way you would ask a capable colleague. It asks back only what it cannot work out itself.
The page it is writing paints on your screen as it goes, so you always know what it is doing.
Every reply ends with clear next moves. Pick one, or take anything back with one undo.
My friend Will is a realtor. He froze the moment he saw a code editor. There are millions of Wills. I am building the door.
Alson Niu, founder
Yes. You sign in with the Claude or ChatGPT plan you already have. ThinkBigger never resells or marks up AI usage.
In an ordinary folder on your own computer. You can open every file without ThinkBigger.
Every change is kept in a history. Undo one step, or rewind the whole project to an earlier point.
No. It was built for people who never will, and it keeps the technical layer out of your way.