A ready email in 15 minutes
Letteros is a platform for creating and sending email campaigns. Pick a template, fill it with content, test it, and send.
Need a setup for your team?
How Letteros works
Everything for email production — already inside
AI email audit
The email is checked against a 100-point checklist covering readability, creative, design principles, and technical criteria. You get concrete recommendations before sending.
Analytics
Track opens, clicks, and engagement right inside the platform. A click map shows which elements of the email perform best.
Image editor and GIF generator
Edit images right in the editor — remove the background, crop, adjust tone. Generate images with AI or build frame-by-frame GIF animations.
Code editor
Edit a module's code right in the editor or import ready-made markup. Check the code with renders and microservices without leaving the platform.
AI content generation
Subject line, preheader, and automatic alt-text generation. Email images can also be generated right in the editor.
Content parsing
Content for product cards, news, and blog articles loads automatically from a website link or a Google Sheet.
A master template for your brand in 2 business days
Tell us about your brand in a chat, and our agents build a library of modules: banners, product cards, content blocks. A human email developer checks every module. A finished template costs $200.
One tool for all your brand communications
Emails
A modular email editor with testing in mail clients and export to any platform.
Presentations
Reports, proposals and training materials in your brand style.
Forms
Surveys, polls and event sign-ups. Embed a form on your site or share a link.
Documents
Articles, policies and guides. Publish as a page or send to subscribers by email.
Spreadsheets
Data, plans and calculations next to your emails and presentations.
Banners
Banners and posts for social media, marketplaces and ads, with AI help for copy and images.
Websites
Landing pages built from the same brand modules as your emails.
Video and images
A separate editor for video and images.
FAQ
Getting started
No. The editor works like an ordinary text editor — you change text, images, and links without any technical knowledge. If you need to edit a module’s code or import ready-made markup, that option is available too.
Registration takes a few minutes. To get started, pick a ready-made template from the library for your industry and start assembling emails right away. If you need a master template matching your brand style, the Letteros team builds it for you.
A master template is a design system for email. A library of ready-made blocks matching your brand style: banners, product cards, content blocks, and more. Any campaign for any type of communication is assembled from them. The Letteros team builds the master template for your brand — after that, your team works independently.
Yes. A ready-made HTML template can be imported into Letteros. The Letteros team can also adapt your existing template for the platform.
Features
Yes. HR teams use Letteros for onboarding new employees, corporate digests, surveys, and greetings. The interface is simple — no technical knowledge required. Emails render correctly in Outlook, which is used by most corporate companies.
Yes. Testing mode lets you check how the email looks in real email clients, including different versions of Outlook. For extra protection, any block can be turned into an image, so the layout is guaranteed to stay intact even in old versions of Outlook.
The recommended email size is up to 100 KB. Letteros highlights heavy images and code, so you can see where the email is overloaded and fix it before sending.
Sending and integrations
Yes, if Sender is connected. Create the email in the editor and send the campaign without leaving the platform. If you use another mailing platform, the email exports in the format you need or is passed directly through an integration.
The finished email exports as ZIP, HTML, EML, PNG, PDF, or copies as code. If your mailing platform is already connected, the email is passed directly through the integration. On request, we integrate with any mailing platform.
Yes. For companies with data security requirements, the platform can be installed on your own servers. Learn more during a demo.
