Postmark is a transactional email delivery service that provides fast, reliable inbox placement through a cloud‑based API and optional SMTP endpoints. It offers real‑time webhooks, detailed activity logs, inbound email parsing, and SDKs for major languages, with add‑ons like dedicated IPs and extended retention for higher deliverability and compliance.
Funding
Funding not disclosed
Founders
Product
Problem
Developers and businesses often struggle with unreliable email delivery, slow send times, and complex setup when sending transactional messages such as notifications, receipts, and alerts. Poor inbox placement and lack of real‑time tracking can lead to missed communications and increased support overhead.
Solution
Postmark offers a dedicated transactional email delivery platform that prioritizes deliverability and speed. By replacing traditional SMTP servers with a cloud‑based API (and optional SMTP endpoint), Postmark ensures messages reach inboxes within seconds, often up to four times faster than competing services. The service provides built‑in bounce, spam, and open tracking, as well as inbound email parsing that converts received messages into JSON payloads for webhook consumption. Developers can integrate using official SDKs for any major language, leverage sandbox mode for safe testing, and benefit from detailed analytics, customizable data retention, and multi‑region routing. Optional add‑ons such as dedicated IPs, extended activity retention, and DMARC monitoring further enhance deliverability and compliance.
Target Audience
Primary customers are developers and product teams building web or mobile applications that require reliable, fast transactional email (e.g., SaaS, e‑commerce, fintech, and notification services), as well as small to medium businesses seeking scalable email infrastructure.
Features
- REST API and SMTP endpoints with multi‑region routing for high‑availability sending
- Transactional Message Streams separating one‑to‑one emails from bulk broadcasts
- Real‑time webhooks for bounces, deliveries, opens, clicks, spam complaints, and inbound email processing
- Responsive email template editor and import tool with link and open tracking
- Detailed activity logs (45‑day default, customizable up to 365 days) and granular bounce data
- Inbound email parsing that delivers messages as JSON to a configurable webhook URL
- Official SDKs for all major programming languages and sandbox mode for safe integration testing
- Optional dedicated IPs, extended retention add‑ons, and DMARC monitoring for enterprise compliance