SendGrid
performance benchmarks
Browse SendGrid'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) |
|---|---|---|---|
500M+ | 2nd of 10 → | 13 | 25 |
From January 1st to March 31st, Knock routed 500M+ messages through SendGrid. For adoption, SendGrid ranks 2nd of 10 providers based on new channel connections, with adoption holding steady over the period. SendGrid reported 25 status page updates over the last 90 days, 13 of which were in the last 30 days.
Response time
Response time measures how long SendGrid 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 |
|---|---|---|---|
22ms | 76ms | 81ms | 261ms |
From January 1st to March 31st, SendGrid averaged a daily median response time (p50) of 22ms across all days in the range, meaning half of all requests on a typical day complete in under 22ms. The 99th percentile averaged 261ms, with a peak daily p99 of 1255ms. This places SendGrid among the fastest providers on the Knock platform for API response times.
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% | 0.02% | Jan 21 | 80 | 4 |
From January 1st to March 31st, SendGrid averaged a 0.00% daily error rate for 5xx responses and timeouts, with the highest single-day error rate reaching 0.02%. 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 SendGrid during the specified period. Response time measures time from Knock to provider acceptance. Error rate includes only provider 5xx responses and timeouts.
Recent SendGrid incidents
Recent status page incidents for SendGrid
Ongoing since Apr 11, 2026
THIS IS A SCHEDULED EVENT Apr 11, 04:00 - 08:00 PDTMar 31, 12:23 PDT Scheduled - In order to increase the stability and scalability of our systems, we are performing scheduled maintenance on our Production database on Saturday, April 11, from 4PM-8PM PDT. During this time, incoming category statistics will be delayed in being written to the database, and metrics may lag as a result. Requests for category statistics may also be temporarily unavailable while we perform the maintenance. Thank you
Started Mar 25, 2026 — Resolved Mar 25, 2026
Mar 25, 13:58 PDT Resolved - From 9:08 AM PT - 9:22AM PT today, customers in the EU region may have experienced mail delay for up to 14 minutes. Customer may have received "Internal Deferral" errors when attempting to send mail at this time. Our engineers have investigated and resolved the issue. All impacted services are operating normally.
Started Mar 19, 2026 — Resolved Mar 19, 2026
Mar 18, 19:17 PDT Resolved - Our engineers have monitored the fix and confirmed the issue with CAPTCHA has been resolved. All services are now operating normally at this time.Mar 18, 14:54 PDT Monitoring - Our engineers have implemented a fix and are monitoring system performance. Users that were previously impacted by failed CAPTCHA errors should now have the capacity to login without issue. We will provide another update in an hour or as soon as more information becomes available.Mar 18, 14:32
Started Mar 19, 2026 — Resolved Mar 19, 2026
Mar 18, 19:00 PDT Completed - The scheduled maintenance has been completed.Mar 18, 17:00 PDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Mar 15, 09:57 PDT Scheduled - To ensure our support tools stay fast and reliable, we’ll be performing some scheduled maintenance on Wednesday, March 18th, from 5:00 PM to 7:00 PM PDT. During this two-hour window, our Live Chat and Personalized Support phone lines will be temporarily unavailable. Here’s how
Started Mar 11, 2026 — Resolved Mar 11, 2026
Mar 10, 18:00 PDT Completed - The scheduled maintenance has been completed.Mar 10, 17:30 PDT In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Mar 9, 07:16 PDT Scheduled - As part of correcting an inaccurate timestamp in the response from our Spamreport API request, we will be performing database maintenance on March 10th, from 5:30 to 6:00pm PT. During this time, customers will be unable to access the public API and v2 equivalent APIs and all Sp
Compare SendGrid with other providers
About SendGrid
SendGrid is a cloud-based email delivery platform owned by Twilio, known for high-volume transactional and marketing email.
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
- 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 SendGrid?
SendGrid is an email service provider commonly used for transactional email, marketing campaigns, password resets and account notifications. SendGrid is a cloud-based email delivery platform owned by Twilio, known for high-volume transactional and marketing email.
How much does SendGrid cost?
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. SendGrid offers a free tier with up to 3,000 emails, with a hard sending limit on that plan.
How fast is SendGrid?
Based on real-world data from messages sent through Knock, SendGrid accepts API requests with a median response time of 22ms (p50) and 261ms at the 99th percentile.
How reliable is SendGrid?
From January 1st to March 31st, SendGrid showed an error rate of 0.00% for 5xx responses and timeouts across 500M+ 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 SendGrid?
Key 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, extended email activity history requires a paid add-on and pricing can become complex at higher volumes.
Does SendGrid work with Knock?
Yes. Knock has a native SendGrid integration that enables you to send email notifications through SendGrid as part of a cross-channel workflow. You can combine SendGrid with other channels like in-app feeds, push, SMS, and Slack from a single API call.
Use SendGrid with Knock
Knock enables you to integrate SendGrid alongside other notification channels, manage templates, and orchestrate cross-channel workflows from a single platform.