Truncus is the infrastructure layer below your email API. Deterministic delivery, multi-provider failover, governance, and EU-only processing — in one integration.
Know what happened to every email. Not “accepted” — delivered, bounced, or rejected.
Synchronous delivery confirmation. One API call, one definitive answer: delivered, bounced, or rejected. Average 1.04s.
Durable operations with delivery guarantees: best_effort, at_least_once, exactly_once. Truncus handles retries.
Every email reaches a terminal state — delivered, bounced, or rejected. No "accepted" limbo. You always know what happened.
When delivery fails, Truncus explains why (ISP block, full mailbox, invalid MX) and recommends a specific action.
If your email provider goes down, your system keeps running.
SES Ireland primary, Brevo France failover. If your provider goes down, Truncus routes to the next one automatically.
Per-provider health monitoring. Unhealthy providers are automatically bypassed — no manual intervention needed.
Replay failed deliveries from the event log without resending. Operational resilience without duplicate emails.
API uptime commitment with credit schedule. Pro and Scale plans.
Control who sends what, from which domain, and stop it instantly when something goes wrong.
Transactional and outreach traffic run on isolated domains with separate reputations. Hard API enforcement.
Instantly revoke sending access for any domain, API key, or traffic type. Takes effect in under a second.
Bounce and complaint rates tracked per account. Automatic throttling and suspension when thresholds are exceeded.
Confidence scoring, spam risk check, and domain health assessment before the email leaves your infrastructure.
EU-hosted, encrypted, GDPR-ready. Built for teams that need to pass security review.
Email delivery processed exclusively in AWS SES eu-west-1 (Ireland). No international transfer for email content.
All data encrypted in transit (TLS) and at rest (AES-256). API keys hashed with SHA-256, never stored in plain text.
Real-time delivery events via signed webhooks. Delivery, bounce, complaint, open, and click events.
Content deduplication with SHA-256 hashing in a 10-minute window. Safe retries without duplicate sends.
Free tier includes 3,000 emails/month. No credit card required.
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