Lettermint is a Dutch company offering an API and SMTP service for sending transactional and marketing emails. It is fully EU-based (headquartered in the Netherlands) and emphasizes privacy and deliverability. Features include easy integration (SDKs for multiple languages), multi-domain accounts, and real-time analytics. The site highlights EU compliance (all data stays within Europe) and provides a free developer tier (no credit card required). Lettermint is positioned as a reliable, European alternative for email delivery, with transparent pricing that scales with usage.