Product teams get a visual home for the transactional and lifecycle emails their application sends with Senlo, which sits on top of the delivery provider they already use instead of replacing it. A drag-and-drop editor builds responsive templates without hand-written HTML, exports to MJML or plain HTML when needed, and keeps templates versioned so edits can be reviewed and rolled back safely. Event-triggered automations turn product activity into onboarding sequences, trial reminders, and win-back flows: your app feeds contact events through the API, and Senlo decides which message goes out next. The transactional API sends a rendered template in one call, so receipts, password resets, and alerts stop living as scattered strings in your codebase. Delivery stops being a black box, with sends, deliveries, bounces, and engagement tracked per workspace, a live feed of failures, and suppressions that block bad addresses before they damage sender reputation. Because sending stays with Resend, Postmark, SES, Mailgun, or your own SMTP server, switching providers never means rebuilding a template. Running on a dedicated VPS on RepoCloud with guaranteed CPU, RAM, and SSD, full root SSH access, and a browser serial console. AGPL-3.0 licensed.