A campaigns and sequences delivered same-day playbook for Agencies & Freelancers, built headless api. Starting from a client needs an ongoing program, Mailable designs every on-brand email in the flow and ships it through client esps and the tools you already use - inbox-ready in every client.
Trigger
A client needs an ongoing program
Agencies & Freelancers
Design engine

Mailable
prompt → on-brand email
Brand kit
colors · fonts · voice
Who runs it
Build mode
Built via the headless API + MCP
Account & strategy
team
Designers
team
Agency owners
team
Integrations
Synced via API & MCP
Sends to
Client ESPs
Client brand kits
Analytics
Trigger: A client needs an ongoing program
Build reusable sequences once per client
Mailable keeps every send on the client’s brand
Schedule recurring issues and promos
Branded, client-facing result summaries
Synced from your stack; designs stay on-brand by default.
Built via the headless API + MCP
Client ESPs
Client brand kits
Analytics
Headless API
Your product or an LLM agent calls the Mailable API (or MCP server) to design and send this flow programmatically - on-brand, inbox-ready HTML, no browser required.
Start free, or talk to us about designing email at scale through the editor and the headless API.