Artificial Intelligence

Use AI to draft replies, summarize threads, and analyze sentiment.

The OpenAI integration brings AI-powered features directly into Missive. Generate drafts, summarize long threads, translate messages, and more - without leaving your inbox.

AI requires the Productive or Business plan and an OpenAI account. See pricing.

What you can do

Feature	Description
Generate drafts	Create reply drafts based on message content. AI can reference your canned responses to give accurate, on-brand answers.
Summarize threads	Get quick summaries of long email threads. Useful when jumping into a conversation mid-stream.
Translate messages	Translate incoming messages to your language, or translate your draft to match the recipient's language.
Fix grammar and tone	Polish your drafts before sending. Adjust tone from casual to formal, or vice versa.
Extract information	Pull out key details like dates, names, or action items from messages.

Where AI appears

On messages: Click the AI icon on any message to summarize, translate, or generate a reply.

In drafts: Select text and use AI to rewrite, fix grammar, or change tone. Or generate an entire draft from scratch.

Via rules: Automate AI actions on incoming messages - auto-summarize, auto-label, or create draft replies. See AI Rules.

API key vs ChatGPT subscription

OpenAI offers two distinct services. You need an API key for Missive - a ChatGPT subscription won't work.

Service	Purpose	How you access it	Billing
ChatGPT subscription	Use ChatGPT through the web interface	chat.openai.com	Monthly subscription ($20/month for Plus)
OpenAI API	Integrate AI into applications like Missive	API key	Pay-as-you-go based on usage

Setup

1

Get your OpenAI API key

Create an OpenAI account if you don't have one.

Go to OpenAI Platform and navigate to Settings > API Keys.

Click Create new secret key and copy it somewhere safe - you won't be able to see it again.

(Optional) Find your Organization ID in Settings > General. You'll need this if your OpenAI account belongs to multiple organizations.

2

Add the integration in Missive

In Missive, go to Settings > Integrations > click on Add integration > search for and OpenAi and click Add to Missive.

Enter your:

• API key (required)

• Organization ID (optional)

Click Add.

3

Share with your team (optional)

To let your team use AI features or create AI rules, share the integration:

Go to Settings > Integrations > OpenAI and click Share integration at the top.

Shared integrations mean everyone uses the same OpenAI API key. All usage bills to your OpenAI account.

Cost and usage

OpenAI bills based on tokens processed (both input and output). Costs vary by model:

Model	Best for	Approx. cost per 1M tokens
GPT-5 mini	Most daily tasks, good balance of speed and quality	$0.15-$0.60
GPT-5	Complex reasoning, detailed analysis	$2.50-$10.00
GPT-4o mini	Previous generation, still reliable	$0.15-$0.60

Real-world example: At Missive, our team of 12 people averages under $7/month using AI for daily email tasks.

Set a monthly budget limit in OpenAI to prevent unexpected charges.

Managing costs

Add conditions to AI rules - Rules that check every email can rack up costs quickly. Use conditions to limit when AI runs (e.g., only unassigned conversations, only specific labels).

Choose the right model - GPT-5 mini works great for most tasks and costs significantly less than GPT-5. You don't always need the most powerful model.

Monitor usage - Check your OpenAI dashboard regularly to understand what's driving costs.

Looking to run AI automatically on incoming messages? See AI Rules.

See it in action

Blake from Earmark shows how his team uses AI rules to draft support replies automatically:

Next steps

• Create AI prompts - Build custom prompts for your workflows

• Manage AI shortcuts - Control which prompts appear in your quick actions