It doesn't matter whether you send four million receipts a month or forty thousand. You need proof the mail lands, custody of your own data, and someone who answers when a domain goes quiet.
We're a small bench of deliverability engineers, former postmasters, and the founders themselves. You reach them directly — not a queue, not a reseller, not a bot with a ticket number.
Reach an on-call engineer when it matters, with written response times and a shared channel of your choosing.
Sit down with the people who run our sending infrastructure. Learn what mailbox providers actually score you on.
No recycled deliverability checklists. Recommendations come from your own domains, volumes, and complaint data.
Trusted by teams shipping at scale
The controls a payments-adjacent workload asks for: scoped access, encryption end to end, regional redundancy, and uptime commitments written down rather than implied.
SOC 2 Type II attested. Audit completed with Harborline Assurance; report available under NDA.
GDPR compliant, with DPAs, records of processing, and subject requests handled in-product.
Encrypted at rest with AES-256 and in transit over TLS 1.3, keys rotated on a 90-day cycle.
99.97% API availability, with a named contact who calls you before your dashboard does.
Volumetric and application-layer filtering in front of every send endpoint, tuned per tenant.
Issue keys limited to a domain, a template set, or a single environment. Revoke without a redeploy.
Suppression lists and event logs snapshot hourly and retained across two regions for 14 days.
Twice-yearly external tests by Ridgemark Labs, plus continuous dependency and secret scanning.
"We moved eleven years of transactional mail across in a fortnight. Their team mapped every template, sat in our incident channel, and our complaint rate went down, not up."
"As of last week every receipt we send runs through Tidepost. The local preview tooling means nobody has to leave their editor to check a template renders."
"Webhooks land fast enough that we pipe opens and clicks straight into our warehouse. When a domain wobbled on a Sunday, an engineer — not a bot — was in our channel in nine minutes."
"Set-up took an afternoon. I like the posture they take on warming dedicated IPs — measured, documented, no hand-waving. I've stopped dreading deliverability reviews."
"Their postmaster review found a DKIM alignment issue two vendors had missed. Placement in one problem region climbed 18 points in the following month."
