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

Independent ESP Performance Monitoring

Real-time benchmarks, delivery speed testing, and reliability tracking

Monitoring 12 email service providers across 6 global regions

Explore BenchmarksCompare Providers
Avg Delivery Speed
266ms
Avg Uptime
99.92%
Emails Tracked
847M
Active Providers
12

Top Performers

View all benchmarks
#
Provider
Score
CurrentLIVE
Status
1Brew9494
2Resend9191
3Postmark9090
4SendGrid8585
5Amazon SES8383

Current Status

Brew
94
Resend
91
Postmark
90
SendGrid
85
Amazon SES
83
Mailgun
82
SparkPost
80
Loops
81
Customer.io
78
Brevo
76
Mailchimp
74
Plunk
72

Recent Incidents

View all
Dashboard Analytics DelayedMinor
Plunk·Feb 18, 2026·45m·Resolved

Real-time analytics in the dashboard were showing delayed data. Email sending and delivery were unaffected. Analytics backfill completed automatically.

EU Region Delivery DelaysMajor
Mailgun·Feb 8, 2026·1h 35m·Resolved

Significant delivery delays affecting the EU hosting region. Emails were queuing properly but experiencing 15-30 minute delivery delays. US region remained unaffected.

API Documentation UnavailableMinor
Loops·Feb 3, 2026·22m·Resolved

The API documentation portal was temporarily inaccessible due to a deployment issue. All email functionality remained operational.

Template Preview Rendering IssuesMinor
Mailchimp·Jan 28, 2026·38m·Resolved

Email template previews were rendering incorrectly in the campaign editor. Actual sent emails were displaying correctly in recipients' inboxes.

Webhook Delivery FailuresMajor
SparkPost·Jan 22, 2026·1h 22m·Resolved

Event webhooks were not being delivered to customer endpoints. Email sending continued normally but tracking data was not propagated. Backfill of missed events was completed within 6 hours of resolution.

Latest Research

All articles
reportbenchmark

The State of Email Delivery in 2026

Our comprehensive annual report analyzing the performance, reliability, and evolution of email service providers over the past year.

February 15, 20268 min read
comparisontransactional

Transactional Email Showdown: Postmark vs Resend vs Brew

Head-to-head comparison of the three leading transactional email providers, analyzing speed, reliability, and developer experience.

January 20, 20267 min read
guidetransactional

The Rise of Developer-First Email Platforms

Analyzing the shift toward API-first email services and what it means for modern application development.

November 22, 20257 min read

Benchmark Updates

Weekly digest of ESP performance changes, new incidents, and research insights.

How We Test

Our benchmarks are collected from automated testing agents distributed across 6 global regions, running hourly performance checks.

Read Methodology