Think freely.
A sentence in English. A phrase in Chinese. Start with the words you have.
A LITTLE COMPANION FOR YOUR WORDS
Change how you say it. Keep what you mean.
A thought shouldn’t have to wait for the right words. Write in the languages that come naturally. Let Sayo help you find your voice, right where you’re typing.
For macOS 14 and later · Public download coming later
A SMALL DEMONSTRATION 01 — 03
Language learning · Weekend plans
Natural Chinese · Language practice
这个周末，我想和朋友去海边散步，聊聊天，再拍几张照片。
Sayo Your thought, in a new language.
Missing a word? Start with the languages you know.
Core capabilities
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Across your inputs. Right where you type.
From messages and emails to documents, rewrite and replace in the input you’re already using.
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Your terminal. Your agents, too.
Connect Sayo to your shell, Codex CLI, Claude Code, and other supported agents. Refine your prompt before you send it.
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Your model. Your privacy.
Choose a cloud service or a local model. Run locally to keep text on your device, with zero model API fees.
Call on Sayo.
Use the little bubble or your shortcut. Rewrite a selection, or the whole thought.
Make it yours.
Read, replace, and carry on in the same input. Your train of thought stays with you.
MADE TO FIT, NOT INTERRUPT
Less switching. More saying.
BRING YOUR OWN MODEL
Your words. Your choice of model.
Use your preferred cloud service or a compatible local model.
A PLACE FOR YOUR PROMPTS, TOO
From a message to the command line.
Optional shell and CLI editor integrations bring Sayo to your terminal drafts. Rewrite, review, then send when you’re ready.
zsh · bash 4+ · fish
帮我解释这个函数, keep it concise
Explain this function and keep it concise.
A FEW THINGS TO KNOW
Before we say hello.
Can I download Sayo yet?
Sayo is currently in private beta. Public downloads are not available yet. This page will be updated when it is ready for more people.
Is Sayo only for Chinese and English?
No. You can mix languages in your draft and choose a target language in Sayo. Results depend on your chosen model. This website currently speaks English and Simplified Chinese, with room for more languages.
What do I need to get started?
A Mac running macOS 14 or later, Accessibility permission, and a configured model. You can connect a cloud service with your own API key or use a compatible local model.
Does it work in every app?
Sayo works with supported macOS text fields. Compatibility depends on what each app exposes through Accessibility. Some apps need the optional copy-and-paste compatibility mode; shell and CLI support require their own integrations.
Do I need a model subscription?
A local model runs without model API fees. If you choose a cloud service, its provider’s pricing applies.
Why a little chameleon?
A chameleon changes its colors, but stays itself. That is the spirit of Sayo: change how you say it, not what you mean.
a little change. still you. SAME YOU. A NEW WAY TO SAY IT.
Let your thoughts find their words.
You don’t have to find the perfect words before you begin. Sometimes, you find them by writing.
For macOS 14 and later · Public download coming later