Amazon SES vs Mailjet
Compare Amazon SES and Mailjet based on observed API performance, features, and pricing
Live performance comparison
Real-world performance data from messages sent through Knock
| Provider | Message volume | Growth | Status page updates (30d) | Status page updates (90d) |
|---|---|---|---|---|
 | 25M–100M | 3rd of 10 ↑ | 0 | 0 |
 | <1M | 6th of 10 ↓ | 0 | 0 |
From December 12th to March 12th, Knock routed 25M–100M messages through Amazon SES and <1M through Mailjet. Amazon SES reported 0 status page updates over the last 90 days, while Mailjet reported 0.
Response time
Response time measures how long each provider takes to accept an API request from Knock, including connection overhead and any automatic retries. Lower values mean faster message hand-off.
| Provider | Median (p50) | p90 | p95 | p99 |
|---|---|---|---|---|
| 127ms | 214ms | 246ms | 472ms |
| 408ms | 525ms | 565ms | 701ms |
The chart above shows each provider's daily median response time (p50) from December 12th to March 12th. The top-line number is an average of these daily values: Amazon SES averaged 127ms compared to 408ms for Mailjet. Amazon SES's highest daily p50 was 160ms; Mailjet's was 491ms. Amazon SES is 281ms faster at the median, which can add up at high volumes.
The 90th percentile (p90) captures the slowest 10% of requests, revealing how each provider handles moderate stress. Averaged across all days, Amazon SES has a p90 of 214ms compared to 525ms for Mailjet. The highest daily p90 was 244ms for Amazon SES and 593ms for Mailjet. Amazon SES handles these slower requests 311ms faster, suggesting more consistent performance across the board.
The 99th percentile (p99) represents the long tail — the slowest 1% of requests. Averaged across all days, Amazon SES reached 472ms at p99 while Mailjet reached 701ms. The highest daily p99 was 492ms for Amazon SES and 5104ms for Mailjet, indicating the worst-case response time during spikes or provider-side congestion. Amazon SES shows a tighter tail, which may matter for time-sensitive notifications like one-time passwords or real-time alerts where even rare delays can impact user experience.
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.
| Provider | Avg. daily error rate | Highest daily rate | Peak error date | Zero-error days | Days above 0.01% |
|---|---|---|---|---|---|
| 0.00% | 0.01% | Feb 4 | 90 | 0 |
| 0.00% | 0.12% | Feb 23 | 90 | 1 |
Averaged across the date range, Amazon SES shows a 0.00% daily error rate compared to 0.00% for Mailjet. The highest single-day error rate was 0.01% for Amazon SES and 0.12% for Mailjet. Both providers show similar reliability levels, with error rates well within acceptable thresholds. Knock automatically retries failed requests to both providers, minimizing the impact of transient errors on end-user delivery.
About these metrics: Data represents messages sent through Knock during the specified period. Response time measures time from Knock to provider acceptance. Error rate includes only provider 5xx responses and timeouts.
Recent Amazon SES incidents
Status page incidents from the last 30 days for Amazon SES
No incidents reported in the last 30 days
Recent Mailjet incidents
Status page incidents from the last 30 days for Mailjet
No incidents reported in the last 30 days
Pros and cons
Amazon SES
Mailjet
Pros
- Delivers billions of emails per year for Netflix, Reddit, and Amazon
- Lowest cost per email among major providers with simple pay-as-you-go pricing
- Deep integration with the AWS ecosystem and SDKs in all major languages
- Highly scalable with no sending limits after warm-up
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
- Setup is complex with documentation that can be difficult to navigate
- New accounts are sandboxed to 200 messages per 24-hour period
- Accessing analytics requires additional AWS services like SNS and Lambda
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 the difference between Amazon SES and Mailjet?
Amazon SES is a cost-effective, cloud-scale email service built on AWS infrastructure. Mailjet is a collaborative email platform with real-time editing and combined transactional and marketing capabilities. Amazon SES is best suited for cost-sensitive, high-volume, while Mailjet is geared toward team collaboration + marketing.
Which is cheaper, Amazon SES or Mailjet?
3,000 free emails per month for the first 12 months. After that, $0.10 per 1,000 emails with additional charges for attachments and dedicated IPs. 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. The best value depends on your sending volume. Use the pricing calculator above to compare costs at your expected volume.
Which is faster, Amazon SES or Mailjet?
Based on real-world data from Knock, Amazon SES has a median API response time (p50) of 127ms compared to 408ms for Mailjet.
Which is more reliable, Amazon SES or Mailjet?
From December 12th to March 12th, Amazon SES showed an error rate of 0.00% while Mailjet showed 0.00%. Both rates are within acceptable thresholds for production email delivery, and Knock automatically retries failed requests to minimize the impact of transient errors.
Which is more popular, Amazon SES or Mailjet?
On the Knock platform, Amazon SES handled 25M–100M messages from December 12th to March 12th compared to <1M for Mailjet. Amazon SES is currently trending upward in adoption, while Mailjet is seeing declining volume.
Can I use both Amazon SES and Mailjet together?
Yes. Knock enables you to integrate multiple email providers into a single notification workflow. You can use Amazon SES and Mailjet side by side, route traffic between them, or migrate from one to the other without changing your application code.
What are the main pros and cons of Amazon SES vs Mailjet?
Amazon SES strengths include delivers billions of emails per year for netflix, reddit, and amazon and lowest cost per email among major providers with simple pay-as-you-go pricing. Mailjet 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, Amazon SES drawbacks include setup is complex with documentation that can be difficult to navigate, while Mailjet drawbacks include activated automation workflows cannot be edited, requiring new workflows for any changes.
Use either provider with Knock
Knock enables you to integrate Amazon SES, Mailjet, or any combination of email providers into a single notification workflow. Manage templates, orchestrate cross-channel delivery, and switch providers without changing your code.