AI email assistant for OutlookSelect the email text you want to improve, press a shortcut, and keep working in Outlook. Keystro never needs access to your mailbox, calendar, contacts, or files.
Hi Sarah,
A quick update: the analysis is nearly complete. We need one additional day to verify the final figures before sharing it with you.
I will send the completed analysis tomorrow afternoon. Best regards, John
The Outlook workflow
Keystro works on the text visible in your current draft or thread. It does not connect to the rest of your Microsoft account.
Choose a draft, rough note, paragraph, or visible thread content.
Draft an email, correct the text, or ask a specific question.
The result returns to Outlook. You review it and decide what gets sent.
Before
Hi Sarah, quick update, analysis almost done but need one more day to verify numbers. can send tomorrow afternoon. best, john
After
Hi Sarah, A quick update: the analysis is nearly complete. We need one additional day to verify the final figures before sharing them with you. I will send the completed analysis tomorrow afternoon. Best regards, John
Repeated email work
Transform a rough update into a structured professional message.
Correct grammar, improve clarity, or add a custom // instruction.
Select the relevant thread text and ask for decisions, actions, or a concise summary.
Make a message shorter, warmer, more direct, or more formal without rebuilding it.
Clear permission boundary
Keystro has a narrower role: process the text you select after you press a shortcut, return the result, and discard the content.
Read the Privacy PolicyYour professional context
Set your role, company context, preferred tone, vocabulary, and reusable prompts once. Keystro can apply them when an email task needs that context.
Role, company, tone
Names and professional terms
Reusable // instructions
Questions
No. Keystro does not connect to your mailbox, read your inbox, or request access to Outlook data. It processes only the text you deliberately select when you trigger a shortcut.
No. Keystro does not request access to your calendar, contacts, OneDrive, attachments, or other files.
Yes. Select the thread text visible in Outlook, press Ctrl+Shift+A, and ask for a summary, decisions, action items, or another specific output.
No. Keystro transforms selected text, but you remain responsible for reviewing and sending the email in Outlook.
Keystro can use the professional profile, vocabulary, and reusable prompts configured in your account to make recurring email work more consistent.
No. Selected text is not stored in Keystro databases, logs, or persistent caches. Every OpenAI request uses store: false.
Start with selected text and one shortcut. Keystro is free for your first 50 AI actions each month.
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