Mailtrap vs SendGrid
Compare Mailtrap and SendGrid 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) |
|---|---|---|---|---|
| <1M | 7th of 10 → | 1 | 1 |
| 500M+ | 2nd of 10 → | 0 | 0 |
From January 22nd to April 22nd, Knock routed <1M messages through Mailtrap and 500M+ through SendGrid. Mailtrap reported 1 status page update over the last 90 days, while SendGrid 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.
The chart above shows each provider's daily median response time (p50) from January 22nd to April 22nd. The top-line number is an average of these daily values: Mailtrap averaged 93ms compared to 22ms for SendGrid. Mailtrap's highest daily p50 was 197ms; SendGrid's was 24ms. SendGrid is 71ms 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, Mailtrap has a p90 of 219ms compared to 75ms for SendGrid. The highest daily p90 was 926ms for Mailtrap and 98ms for SendGrid. SendGrid handles these slower requests 144ms 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, Mailtrap reached 994ms at p99 while SendGrid reached 463ms. The highest daily p99 was 1651ms for Mailtrap and 1255ms for SendGrid, indicating the worst-case response time during spikes or provider-side congestion. SendGrid 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% | 0.00% | Jan 22 | 91 | 0 |
| 0.00% | 0.02% | Feb 18 | 84 | 2 |
Averaged across the date range, Mailtrap shows a 0.00% daily error rate compared to 0.00% for SendGrid. The highest single-day error rate was 0.00% for Mailtrap and 0.02% for SendGrid. 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 Mailtrap incidents
Recent status page incidents for Mailtrap
Recent SendGrid incidents
Recent status page incidents for SendGrid
No incidents reported in the last 90 days
Pros and cons
Mailtrap
SendGrid
Pros
- Strong deliverability with dedicated IPs, auto warmup, and automatic authentication
- Great developer experience with comprehensive docs and MCP support for IDEs
- Combined testing sandbox and production sending in one platform
- Trusted by PayPal, Atlassian, Adobe, and Yelp
Pros
- Comprehensive documentation with SDKs for most major languages
- Rich analytics tools with programmatic API access to engagement data
- Strong focus on deliverability with AI-powered intelligent delivery
- Trusted by Uber, Booking.com, and Yelp for high-volume sending
Cons
- Native integration ecosystem is smaller than established competitors
- Lower sending limits on free tier compared to some providers
- No rate limits by default, which may require custom throttling configuration
Cons
- Extended email activity history requires a paid add-on
- Pricing can become complex at higher volumes
- Support response times vary by plan tier
Frequently asked questions
What is the difference between Mailtrap and SendGrid?
Mailtrap is an email platform combining safe testing and sandbox environments with production sending capabilities. SendGrid is a cloud-based email delivery platform owned by Twilio, known for high-volume transactional and marketing email. Mailtrap is best suited for email testing + qa, while SendGrid is geared toward high-volume transactional + marketing.
Which is cheaper, Mailtrap or SendGrid?
Free tier includes 4,000 emails per month (150/day limit). Paid plans start at $15/month for 10,000 emails with overages at $1.00/1K. Free tier includes up to 100 emails per day for 60 days. Paid plans start at $19.95/month for 50,000 emails on the Essentials plan, with an Essentials 100K tier at $34.95/month. Pro plans with dedicated IPs start at $249/month for 300,000 emails. The best value depends on your sending volume. Use the pricing calculator above to compare costs at your expected volume.
Which is faster, Mailtrap or SendGrid?
Based on real-world data from Knock, Mailtrap has a median API response time (p50) of 93ms compared to 22ms for SendGrid.
Which is more reliable, Mailtrap or SendGrid?
From January 22nd to April 22nd, Mailtrap showed an error rate of 0.00% while SendGrid 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, Mailtrap or SendGrid?
On the Knock platform, Mailtrap handled <1M messages from January 22nd to April 22nd compared to 500M+ for SendGrid. Mailtrap volume has remained stable, while SendGrid volume has remained stable.
Can I use both Mailtrap and SendGrid together?
Yes. Knock enables you to integrate multiple email providers into a single notification workflow. You can use Mailtrap and SendGrid 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 Mailtrap vs SendGrid?
Mailtrap strengths include strong deliverability with dedicated ips, auto warmup, and automatic authentication and great developer experience with comprehensive docs and mcp support for ides. SendGrid strengths include comprehensive documentation with sdks for most major languages and rich analytics tools with programmatic api access to engagement data. On the other hand, Mailtrap drawbacks include native integration ecosystem is smaller than established competitors, while SendGrid drawbacks include extended email activity history requires a paid add-on.
Use either provider with Knock
Knock enables you to integrate Mailtrap, SendGrid, or any combination of email providers into a single notification workflow. Manage templates, orchestrate cross-channel delivery, and switch providers without changing your code.