Send campaigns, track deliverability, manage contacts — all on your own infrastructure. AI-native with full MCP integration, brand voice enforcement, and no per-subscriber fees. Ever.
No credit card required on the free plan.
What you get
Brand voice enforcement, campaign advisor, content suggestions, and per-contact personalization. Claude writes your emails — you approve and send.
Drag-and-drop campaign flows with branching logic, conditional paths, and A/B testing. Design complex sequences visually, not in spreadsheets.
Sequences, broadcasts, triggered automations, recurring newsletters, and timezone-aware scheduling. Multi-step with per-step analytics.
Engagement scoring (0-100), lifecycle stages, custom properties, duplicate detection with fuzzy matching, and automatic email verification.
Track conversions from email campaigns, measure per-campaign ROI, and surface revenue insights in your dashboard.
Show different content to different contacts based on engagement level, tags, lifecycle stage, or any custom property. One campaign, many experiences.
Build signup forms, embed on your website, auto-tag and segment new subscribers. Double opt-in built in. Topic-based preference center included.
REST API for transactional sends, events, and conversions. Full MCP integration — every operation in Sendinel is accessible to AI agents via Claude Code, Cursor, or any MCP-compatible client.
Domain health monitoring, warmup enforcement, DMARC reports, proactive Slack alerts, and automated recovery plans. Never miss a deliverability issue.
Docker local dev, Playwright E2E tests, webhook logs, full API docs, competitor CSV import, and a setup wizard that takes 5 minutes.
How it works
Run the setup wizard. Point Sendinel at your data layer, email API, and sending domain. DNS is auto-configured in one click - no manual record editing.
Import contacts via CSV or API. Sendinel scores engagement, tracks lifecycle stages, and segments by behavior automatically.
Tell the AI what you want to send and who to send it to. Review the draft. Activate. The rest is automated.
Pricing
No per-subscriber fees. No usage creep. Cancel any time.
* BYOD unlimited contacts and sends are bounded by your own database and email provider account limits.
No card required on the free plan. Takes about 5 minutes from signup to your first send.
Get started freeFree plan · No credit card · Cancel any time