Lettr
The Email Platform Built for SaaS
Lettr is an email platform for SaaS companies that combines transactional and marketing email in one system. It provides a REST API and SMTP relay for sending, alongside a visual editor for building templates, so teams can manage product-triggered messages and campaigns from a single account. The platform is EU-hosted and GDPR and CCPA compliant, with SPF, DKIM, and DMARC authentication handled through a DNS setup wizard.
Core capabilities include a drag-and-drop editor powered by Topol, with synced sections, draft-and-publish workflows, dynamic placeholders, and a SaaS template library. Multilingual campaigns let contacts receive emails in their language based on a contact property, with per-language subjects and senders. SDKs are available for PHP, Laravel, Node.js, Go, Java, and Rust, and the platform supports React webhooks, searchable logs, contacts, lists, and segments. Transactional and marketing are billed separately: transactional is usage-based per email, while marketing is usage-based per contact. Both include a free tier, and paid plans add features such as more sending domains, advanced analytics, dedicated IPs, and priority support.
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