An on-brand email in minutes
Build a campaign from brand modules on the canvas, or hand it to the copilot or an agent in Claude and ChatGPT. Before sending, see how the email looks in Outlook, Gmail and Apple Mail.
What it does
Brand modules
Headers, banners, products, text and buttons come in your brand colours and fonts. Drag a module onto the canvas and swap the text and images.
Copilot and agent
Describe the email in plain words and the copilot builds it in the editor step by step. An agent in your Claude or ChatGPT does the same over MCP.
Inbox previews
Pick Outlook, Gmail, Apple Mail and mobile mail apps, and screenshots arrive in a few minutes. If a screenshot fails, the tokens come back.
Test and send
Send a test to yourself and your team, then send the campaign through Sender or export it to your sending platform.
How to start
- 1
Brand
Add your logo, colours and fonts, or order a master template.
- 2
Build
Build the email by hand, with the copilot or with an agent.
- 3
Check
Review inbox screenshots and send a test.
Creating and copying emails is free. An email is paid once: 100 tokens on its first test or export.
Works together with
One platform for sales, marketing and service
Every team works with one customer card. Communications go out by email, Telegram, WhatsApp, push, pop-ups and ad accounts.
- Sales CRMDeals by stage, companies and people. The customer’s campaigns and conversations show right on their card.Learn more
- Marketing CRMBase, segments, campaigns and flows. A flow writes to the customer on its own when they take the right action.Learn more
- Service and contact centreMessenger conversations in one feed, each with an owner. The agent sees the full customer history.Learn more
- Telegram
- Mobile push
- Web push
- Pop-ups
- In-app
- Retargeting
Try Letteros for free
Signing up through Telegram takes a couple of minutes. Once your request is approved, the project gets 2,000 tokens for 7 days.