MailerSend
performance benchmarks
Browse MailerSend's observed email API response time, error rates, and incident history over the last 90 days.
Live performance metrics
Real-world performance data from messages sent through Knock
| Message volume | Growth | Status page updates (30d) | Status page updates (90d) |
|---|---|---|---|
<1M | 7th of 10 ↓ | 1 | 2 |
From July 24th to October 22nd, Knock routed <1M messages through MailerSend. For adoption, MailerSend ranks 7th of 10 providers based on new channel connections, with adoption slowing over the period. MailerSend reported 2 status page updates over the last 90 days, 1 of which was in the last 30 days.
Response time
Response time measures how long MailerSend takes to accept an API request from Knock, including connection overhead and any automatic retries. Lower values mean faster message hand-off.
| Median (p50) | p90 | p95 | p99 |
|---|---|---|---|
167ms | 349ms | 450ms | 1052ms |
From July 24th to October 22nd, MailerSend averaged a daily median response time (p50) of 167ms across all days in the range, meaning half of all requests on a typical day complete in under 167ms. The 99th percentile averaged 1052ms, with a peak daily p99 of 43537ms. This is slightly higher than some providers, which may reflect additional processing MailerSend performs on message acceptance.
Error rate
Error rate tracks the ratio of 5xx responses and timeouts to total requests. Knock automatically retries failed requests, so transient provider errors rarely affect end-user delivery.
| Avg. daily error rate | Highest daily rate | Peak error date | Zero-error days | Days above 0.01% |
|---|---|---|---|---|
0.00% | 0.00% | Jul 24 | 91 | 0 |
From July 24th to October 22nd, MailerSend averaged a 0.00% daily error rate for 5xx responses and timeouts, with the highest single-day error rate reaching 0.00%. This is one of the lowest error rates among providers on Knock, indicating strong reliability and consistent uptime. Knock automatically retries failed requests, so transient provider errors rarely affect end-user delivery.
About these metrics: Data represents messages sent through Knock to MailerSend during the specified period. Response time measures time from Knock to provider acceptance. Error rate includes only provider 5xx responses and timeouts.
Recent MailerSend incidents
Recent status page incidents for MailerSend
Started Oct 11, 2026 — Resolved Oct 11, 2026
Status: Complete Maintenance has completed Affected components Delivery time (Operational) Email sending API (Operational) Email analytics (Operational) Deliverability rate (Operational) MailerSend APP (Operational) Bulk endpoint (Operational) SMTP (Operational) Email activity (Operational)
Started Sep 21, 2026 — Resolved Sep 21, 2026
Status: Complete Maintenance has completed Affected components SMTP (Operational) Delivery time (Operational) Email sending API (Operational) Inbound routing (Operational) Bulk endpoint (Operational)
Compare MailerSend with other providers
About MailerSend
Mailersend is an intuitive transactional email and SMS service by Mailgun, designed for growing businesses.
Pros
- Designed for both developers and business users with API and visual editor
- Modern, intuitive UI that is easier to navigate than older platforms
- Multi-channel support with native email and SMS transactional messaging
- Affordable Hobby plan at $7/month for 5,000 emails with low overage rates
Cons
- Available integrations with other tools are basic and limited
- Fewer advanced features than enterprise platforms
- Smaller ecosystem compared to established competitors
Frequently asked questions
MailerSend is an email service provider commonly used for transactional email for saas, e-commerce order notifications, account management emails. Mailersend is an intuitive transactional email and SMS service by Mailgun, designed for growing businesses.
Free tier includes 500 emails per month. Paid plans start at $7/month for 5,000 emails on the Hobby plan, with the Starter plan at $35/month for 50,000 emails. MailerSend offers a free tier with up to 500 emails, with a hard sending limit on that plan.
Based on real-world data from messages sent through Knock, MailerSend accepts API requests with a median response time of 167ms (p50) and 1052ms at the 99th percentile.
From July 24th to October 22nd, MailerSend showed an error rate of 0.00% for 5xx responses and timeouts across <1M messages sent through Knock. Knock automatically retries failed requests, so transient provider errors rarely affect end-user delivery.
Key strengths include designed for both developers and business users with api and visual editor and modern, intuitive ui that is easier to navigate than older platforms. On the other hand, available integrations with other tools are basic and limited and fewer advanced features than enterprise platforms.
Yes. Knock has a native MailerSend integration that enables you to send email notifications through MailerSend as part of a cross-channel workflow. You can combine MailerSend with other channels like in-app feeds, push, SMS, and Slack from a single API call.
Use MailerSend with Knock
Knock enables you to integrate MailerSend alongside other notification channels, manage templates, and orchestrate cross-channel workflows from a single platform.