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.
Setup is flexible. Start in one click with Missive AI credits, or bring your own API key for provider-side control. Either path works with Anthropic Claude, OpenAI, and Google Gemini -- pick the provider and model you want per task.
AI requires the Productive or Business plan. Organizations on those plans start with $5 of free Missive AI credits. 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:
Connect the assistant to external tools like Notion, Linear, Attio, Stripe, or your own MCP server.
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.
Two ways to connect
You can connect an AI provider two ways, and you can use either or both at the same time.
Missive AI credits. Missive manages the provider connection for you. You pay Missive for usage from a single credit balance that works across every supported provider. No API key required, and you get per-user cost analytics inside Missive.
Bring your own key (BYOK). You create an API key with the provider (OpenAI, Anthropic, or Google) and paste it into Missive. Usage bills directly to your provider account at the provider's price.
Only organization admins can add or manage AI providers, and every provider is linked to the organization (not a single user).
Setup
Click Add provider in Settings > AI
Create an API key with the provider, paste it into Missive
Who you pay
Missive
The provider directly
Pricing
Provider price + 25% markup
Provider price, no markup
Free to start
$5 one-time for Productive and Business plans
Depends on the provider
Usage visible in Missive
Actions and cost per user
Actions per user
Cost monitoring
Settings > AI in Missive
The provider's own dashboard
When the balance runs out
Admins get a low-balance email; AI stops at $0 until an admin tops up
You manage billing and limits on the provider side
Advanced provider features
Limited (e.g., requests are routed through Missive's US provider account)
Full access (e.g., OpenAI EU data residency)
If ease of use matters most, pick Missive AI credits. If the 25% markup is a concern, or you need advanced provider features like OpenAI's EU data residency, bring your own key.
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. This applies to both Missive AI credits and BYOK.
If you don't connect any AI provider, AI features simply don't appear in Missive. There's nothing to disable.
Supported providers and models
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 4.7, Claude Sonnet 4.6, 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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