Draft a reply in your voice
Krater learns your tone and writes the reply you would.
AI in Microsoft Outlook
AI in Outlook — every model, one inbox
Microsoft Outlook with Krater
Use GPT-5, Claude Opus, and 350+ AI models inside Microsoft Outlook. Draft, reply, summarize threads, and triage your inbox from $20/mo — a real Copilot for Outlook alternative.
Krater pricing · AI model directory · Microsoft Teams integration
Microsoft 365 Copilot limitations
- Requires Microsoft 365 Business + Copilot add-on ($30/user/mo)
- OpenAI models only — no Claude, Gemini, or open-source
- Locked to Microsoft tenant
- No image, video, or cross-app generation
Krater
- 350+ AI models (GPT-5, Claude Opus 4, Gemini 3 Pro, Grok, DeepSeek)
- Image, video, voice, and document tools included
- Cross-app workflows, connect 300+ other apps
- Per-account pricing, not per-seat
- Plans from $20/month
Actions
Summarize a long thread
Turn a 40-message chain into a 5-bullet TL;DR.
Triage your inbox
Sort, flag, and surface what actually needs you today.
Translate any email
Read and reply in any language — formatting preserved.
Pull tasks out of email
Extract action items and push them to Teams or Planner.
Draft a cold outreach
Personalised first-touch emails written from a brief.
Search your inbox by intent
Ask a question; Krater answers from your real emails.
Generate images for newsletters
Hero images and inline graphics, ready to embed.
Starter prompts
Reply in my tone
Read the latest email in my Outlook thread with <name> and draft a reply in my voice.
Summarize this thread
Summarize my Outlook thread with <name> into 5 bullets and the next action.
Triage today
Look at my Outlook inbox from today and tell me which 3 emails actually need a reply.
Translate this email
Translate the latest email from <name> in my Outlook to English and draft a reply in their language.
Extract tasks
Pull every action item out of my Outlook thread with <name> as a numbered checklist.
Cold outreach to a prospect
Draft a 4-line cold outreach email in Outlook to <prospect> at <company> about <pitch>.
Find emails about …
Search my Outlook for everything about <topic> in the last 30 days and summarize what was decided.
Polish before sending
Tighten this draft email, fix grammar, and keep it warm:
Frequently asked questions
Is Krater a Copilot for Outlook alternative?
Yes. Microsoft 365 Copilot is $30/user/month on top of a Business plan. Krater is $20/month total, gives you 350+ models including GPT-5 and Claude Opus 4, and works with any Microsoft account.
Can Krater draft Outlook replies in my tone?
Yes. Krater can study your past sent items and match your voice, length, and sign-off. You always review before sending.
Which Outlook plans does this work with?
Microsoft 365 Personal, Family, Business, and Enterprise — anywhere the Microsoft Graph API is exposed. Copilot requires Business; Krater does not.
Will Krater send emails on my behalf?
Krater drafts replies for you to review and send. Automations (e.g. auto-reply to specific folders) only run when you set them up.
Will my email content be used to train AI?
No. Krater never trains on your data. Email content is sent only for the specific request and not retained for training.
How do I connect Outlook to Krater?
Open Krater, go to /additions, search Microsoft Outlook, click Connect, and sign in with your Microsoft account. Takes about 30 seconds.