Letro is an AI email designer for creating HTML and MJML emails. It is built around a simple flow for describing an email in plain language or uploading a screenshot, then turning that input into a production-ready template that can be refined visually and exported to an ESP already in use.
The product describes support for email prompts such as welcome emails, product launches, newsletters, Black Friday campaigns, and win-back messages. Its interface includes a visual block editor where blocks can be clicked, dragged to reorder, and adjusted for padding, colors, and fonts in a properties panel without touching code. The site also says the AI recreates uploaded designs as templates with brand styling applied automatically, and that brand colors, fonts, and voice are already baked in. The text frames the output as production-ready and says the generation can be seen in real time.
Letro lists exports to any ESP and names Mailchimp, Klaviyo, Brevo, Customer.io, Postmark, Resend, SendGrid, ActiveCampaign, HubSpot, and Drip among the services it can export to. It also mentions MJML and HTML as output formats. The page title and metadata identify it as an AI-powered email designer and mention production-ready HTML and MJML email campaigns.
Letro is a Marketing & ads product. It focuses on designing and exporting professional, brand-aligned email campaigns without needing design or coding skills. Letro is a B2B product aimed at marketers and small business owners. There is a free tier, and paid plans start at $19. Letro is available on the web.
Letro first shipped in 2024. Among its 10 catalogued features are AI email generation, visual block editor, and MJML export.
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