Software for novelists.
Free, forever.
Spex Opus is a native desktop writing app for novelists. No subscriptions. No cloud. No data harvesting. Just you, your manuscript, and the time you've set aside.
The salt houses
By the time she reached the bluff the wind had turned, and the houses below — the long row of them, weather‑silvered, leaning slightly into one another like guests at the end of a long evening — caught the light from the water and gave it back as a kind of pale humming.
She had not been to the bluff in nine years.
"You came," her brother said, when she reached him
Built for the long way around.
Opus is the smallest desktop writing app that still gets out of your way. We took years deciding what to leave out — and what to leave in.
A quiet editor
An editor that gets out of your way. No clutter, no inline AI, no slack ping. Type. That's the whole interface.
read more →A shape for your world
Series, books, chapters, scenes, characters. Organize the way your story actually fits in your head — not the way a folder tree does.
read more →Yours, on your machine
Native on macOS, Windows, and Linux. Your manuscript is a file on your disk. Open it in Vim if you want. We don't mind.
read more →Free, the actual way
No trial. No tier. No upsell. Spex Opus is funded by the writers who choose to support the studio — and nobody else.
read more →We don't want to sell you a subscription. We don't want your data. We want you to finish the book.
A small studio in Brooklyn, funded by the writers who choose to support it. No investors, no ads, no dark patterns.