Theo is an AI writing workspace where you draft documents — emails, articles, newsletters — and steer every line as it forms. When a draft is ready, send it as an email straight from your own Gmail.
Theo turns the blank page into something you shape line by line — pick what you're writing, draft it on a real document, steer every sentence as it forms, and keep every version.
Email, article, newsletter, social post, or a blank page. Tell Theo what you're working on and it opens a fresh document tuned to the job, so you're never starting from nothing. Written an email? Send it from your own Gmail without leaving Theo.
Your draft lives on a clean document with a cursor, real paragraphs, and formatting at hand — bold, italic, highlight, lists. Edit any line yourself; the AI's words and yours sit in the same page.
Focus mode puts a single document front and centre and tucks everything else — tools, settings, history — out of the way. It's just you and the page, so you can think clearly and write without the clutter. Open the tools the moment you need them, then send them back.
The moment a draft drifts, nudge it. Make it shorter, warmer, more formal, or change direction mid-sentence. Theo folds your steer into the text that's already forming — no stopping, no redo.
Each time you reshape a draft, Theo saves the path. Compare versions in place, read a quick summary of any one, and keep whichever reads best.
Start writing free and upgrade when you're ready. Paid plans run the models for you — no keys to manage, no daily window to wait on.
Start writing for free during our daily Hotlight window, or bring your own API key for unlimited access — no card, no commitment.
We run the models for you. No keys to manage, no daily window to wait on — just open Theo and go, across our full model lineup.
Everything in Pro with a far larger monthly allowance, plus multi-model compare — ask once and weigh several models side by side.
Theo is built for research — your subscription helps fund the work and unlocks premium models for everyone.