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Mailjet
performance benchmarks

Browse Mailjet's observed email API response time, error rates, and incident history over the last 90 days.

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Live performance metrics

Real-world performance data from messages sent through Knock

Dec 12, 2025Mar 12, 2026
Updated daily
Message volumeGrowthStatus page updates (30d)Status page updates (90d)
<1M
6th of 10 00

From December 12th to March 12th, Knock routed <1M messages through Mailjet. For adoption, Mailjet ranks 6th of 10 providers based on new channel connections, with adoption slowing over the period. Mailjet reported no status page incidents over the last 90 days.

Response time

Response time measures how long Mailjet takes to accept an API request from Knock, including connection overhead and any automatic retries. Lower values mean faster message hand-off.

Median (p50)p90p95p99
408ms
525ms565ms701ms

From December 12th to March 12th, Mailjet averaged a daily median response time (p50) of 408ms across all days in the range, meaning half of all requests on a typical day complete in under 408ms. The 99th percentile averaged 701ms, with a peak daily p99 of 5104ms. This is slightly higher than some providers, which may reflect additional processing Mailjet 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 rateHighest daily ratePeak error dateZero-error daysDays above 0.01%
0.00%
0.12%Feb 23901

From December 12th to March 12th, Mailjet averaged a 0.00% daily error rate for 5xx responses and timeouts, with the highest single-day error rate reaching 0.12%. 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 Mailjet during the specified period. Response time measures time from Knock to provider acceptance. Error rate includes only provider 5xx responses and timeouts.

Recent Mailjet incidents

Status page incidents from the last 30 days for Mailjet

No incidents reported in the last 30 days

About Mailjet

Mailjet is a collaborative email platform with real-time editing and combined transactional and marketing capabilities.

Pros

  • Hybrid support for both marketers and developers in a single platform
  • Unique real-time collaboration features for team-based template editing
  • EU-only data processing for companies with strict data residency requirements
  • Powers email delivery for over 130,000 companies including Microsoft and DHL

Cons

  • Activated automation workflows cannot be edited, requiring new workflows for any changes
  • Some analytics and deliverability tools are locked behind higher pricing plans
  • Deliverability can lag behind specialists like Postmark

Frequently asked questions

What is Mailjet?

Mailjet is an email service provider commonly used for team-based email creation, transactional email, marketing newsletters. Mailjet is a collaborative email platform with real-time editing and combined transactional and marketing capabilities.

How much does Mailjet cost?

Free tier includes 200 emails per day (6,000/month). Paid plans start at $17/month for 15,000 emails with no daily limit. Premium plans start at $105/month for 100,000 emails. Mailjet offers a free tier with up to 6,000 emails, with a hard sending limit on that plan.

How fast is Mailjet?

Based on real-world data from messages sent through Knock, Mailjet accepts API requests with a median response time of 408ms (p50) and 701ms at the 99th percentile.

How reliable is Mailjet?

From December 12th to March 12th, Mailjet 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.

What are the pros and cons of Mailjet?

Key strengths include hybrid support for both marketers and developers in a single platform and unique real-time collaboration features for team-based template editing. On the other hand, activated automation workflows cannot be edited, requiring new workflows for any changes and some analytics and deliverability tools are locked behind higher pricing plans.

Does Mailjet work with Knock?

Yes. Knock has a native Mailjet integration that enables you to send email notifications through Mailjet as part of a cross-channel workflow. You can combine Mailjet with other channels like in-app feeds, push, SMS, and Slack from a single API call.

Use Mailjet with Knock

Knock enables you to integrate Mailjet alongside other notification channels, manage templates, and orchestrate cross-channel workflows from a single platform.