Vercel
AI Advisor
From clunky builders to email designed from a prompt
- Every event-driven email is a custom script, a queue, and a template that drifts off-brand.
- Transactional email is plain text that breaks the brand.
- Maintaining an email template engine pulls engineering off the product.
- Agents and LLM calls generate off-brand, inconsistent email.
- Point a webhook at Mailable and an on-brand email goes out, no glue code, no babysitting.
- A purchase or signup event triggers a branded, bulletproof email in seconds.
- Mailable is the design layer; you call an API and get rendered, tested HTML back.
- A locked brand kit constrains every generation, human or agent, so output stays on-brand.
A headless email API
Design, render, and send email programmatically with a clean, well-documented API.
- Design and send from code
- Bulletproof HTML returned, tested everywhere
- Idempotent sends with retries and logging
Centralize all customer communications in one shared inbox.
Triggers and webhooks
Fire the right email on any event from your stack, no middleware required.
- Event, time, and behavior triggers
- Inbound webhooks map straight to a send
- Works with Zapier, Make, and n8n
Track your sales pipeline stages. Get a detailed breakdown at a glance.
MCP and agent guardrails
Expose email design as a tool to your agents, constrained by your brand kit.
- Design email as an MCP tool call
- Brand rules locked for every generation
- Consistent output across humans and agents
Vercel
AI Advisor
Why developers trust Mailable
Email as an API call
No template engine to maintain. You send a request and get rendered, bulletproof HTML or a delivered send back.
Timely by default
Triggers turn events into sends, so the right on-brand email lands the moment something happens.
Brand-safe automation
A locked brand kit constrains every generation, so API and agent output never drifts off-brand.
MCP-native
Give your agents a real email-design tool instead of hand-rolled prompts and brittle HTML.
Reliable delivery
Idempotency, retries, and a full event log mean the right email goes out once, every time.
On-brand, bulletproof email sent from your product with a single API call.
Join the waitlistMailable is for everyone who sends email
Describe it. Ship beautiful email.
Start free, or talk to us about designing email at scale through the editor and the headless API.