Overview
Missive's AI assistant drafts replies, searches your emails and calendar, looks up contacts, and finds relevant canned responses. Powered by OpenAI, Anthropic Claude, or Google Gemini.
Missive has a built-in AI assistant that works directly inside your inbox. It reads your conversations, searches across all your connected accounts, checks your calendar, looks up contacts, and drafts replies. All without switching apps.
AI requires the Productive or Business plan and at least one AI provider API key. See pricing.
What the assistant can do
The assistant is not a simple chatbot. It has access to your Missive data and can take action on your behalf:
Search your emails
Searches across all connected accounts (Gmail, Outlook, IMAP, etc.) with filters for date, sender, recipient, and attachments.
Check your calendar
Reads events from Google Calendar and Microsoft Outlook. Can check availability, find conflicts, and suggest meeting times.
Look up contacts
Searches your contact books by name, email, or phone number. Returns full contact details including organization, job title, and custom fields.
Find canned responses
Performs semantic search across your canned responses to find relevant templates, policies, or pre-written replies.
Create and edit drafts
Writes reply drafts directly in the conversation. Handles recipients, subject lines, and signatures automatically. Can update drafts after feedback.
Ask clarifying questions
When your request is ambiguous, presents multiple-choice questions to clarify before proceeding.
Beyond the assistant, Missive offers additional AI features:
Quick, reusable AI actions you can run on messages or drafts: summarize, translate, fix grammar, generate a reply.
Trigger AI on incoming messages automatically. Classify, label, route, or draft replies based on content.
Define organization-wide behavior guidelines so the assistant responds consistently for your whole team.
How AI works in Missive
Missive uses a bring-your-own-key (BYOK) model. You connect your own API key from OpenAI, Anthropic, or Google, and Missive sends content to that provider only when you actively use an AI feature.
Each provider has its own data retention and privacy policies. By default, most providers do not use API data for model training, but you should review your account settings. See the data privacy section on each provider's setup page: OpenAI, Anthropic, Google Gemini.
If you don't connect any AI provider, AI features simply don't appear in Missive. There's nothing to disable.
Missive does not charge extra for AI features. You pay your provider directly based on token usage.
Choose your provider
You can connect one or more providers simultaneously. The assistant lets you pick which model to use per conversation.
OpenAI
GPT-5.2, GPT-5 Mini, GPT-5 Nano
GPT-5 Mini, GPT-5 Nano
Anthropic Claude
Claude Opus 4.6, Claude Sonnet 4.5, Claude Haiku 4.5
Claude Haiku 4.5
Google Gemini
Gemini 2.5 Pro, Gemini 2.5 Flash, Gemini 2.5 Flash Lite
Gemini 2.5 Flash
Anthropic Claude is what the Missive team uses daily. Claude excels at nuanced writing and careful reasoning, which makes it particularly strong for drafting customer-facing replies.
Model availability may change as providers release new versions. Missive updates supported models regularly.
Next steps
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