ESPB
Latest
Feb 18, 2026Plunk: Dashboard Analytics DelayedFeb 15, 2026The State of Email Delivery in 2026Feb 8, 2026Mailgun: EU Region Delivery DelaysFeb 3, 2026Loops: API Documentation UnavailableFeb 1, 2026Q1 2026 ESP Performance ReportJan 28, 2026API Latency Comparison: Which ESP Responds Fastest?Jan 20, 2026Transactional Email Showdown: Postmark vs Resend vs BrewFeb 18, 2026Plunk: Dashboard Analytics DelayedFeb 15, 2026The State of Email Delivery in 2026Feb 8, 2026Mailgun: EU Region Delivery DelaysFeb 3, 2026Loops: API Documentation UnavailableFeb 1, 2026Q1 2026 ESP Performance ReportJan 28, 2026API Latency Comparison: Which ESP Responds Fastest?Jan 20, 2026Transactional Email Showdown: Postmark vs Resend vs Brew

Postmark

90

Reliable transactional email

transactional
Operational
Founded 2010
Visit Website

Postmark is a veteran in the transactional email space, known for its exceptional reliability and delivery speed. With a laser focus on transactional email, Postmark has built a reputation for industry-leading uptime and consistent inbox placement rates.

Speed
93
Reliability
94
Deliverability
91
Developer Experience
88
Value
84

Current Metrics

Updated just now
Delivery Speed (p50)130ms
Delivery Speed (p95)300ms
Delivery Speed (p99)460ms
Delivery Speed (avg)160ms
API Latency (p50)35ms
API Latency (p95)100ms
API Latency (p99)170ms
API Latency (avg)45ms
Uptime (30d)99.99%
Deliverability98.4%
Bounce Rate0.9%
Throughput9,500/s

12-Month Trend

Overall Score
Delivery Speed (avg ms)
Uptime %
Deliverability %

Features

✓Message streams
✓Dedicated IPs
✓Bounce management
✓Inbound email
✓Templates API
✓SMTP relay
Pricing starts at $15/mo (10,000 emails)

Incidents (1)

Inbound Email Processing DelayMinor
Postmark·Oct 22, 2025·18m·Resolved

Inbound email parsing and webhook delivery experienced brief delays. Outbound email delivery continued at normal speed.

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