Maily

Maily is a sophisticated, open-source AI email marketing infrastructure designed to disrupt the legacy ESP (Email Service Provider) market. Built with a modern tech stack featuring React-Email, Vercel AI SDK, and support for multiple LLM providers (including OpenAI, Anthropic, and Groq), Maily allows organizations to deploy autonomous agents for lead research and email generation. Its architecture focuses on extreme personalization by enabling agents to crawl public data, such as LinkedIn or company websites, to craft hyper-relevant outreach. By 2026, Maily has positioned itself as the developer-first alternative to Mailchimp and Klaviyo, offering both a cloud-managed service and a self-hosted enterprise version. The platform's core advantage lies in its ability to handle complex A/B testing cycles through generative AI, where the system doesn't just test templates but evolves the copy and visual assets based on real-time engagement data. It integrates seamlessly with modern delivery APIs like Resend, Amazon SES, and Postmark, providing a modular approach to email delivery that prevents vendor lock-in.