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 | 23 |
From December 12th to March 12th, 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 23 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 | 77ms | 83ms | 159ms |
From December 12th to March 12th, 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 159ms, with a peak daily p99 of 1256ms. 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 | 83 | 3 |
From December 12th to March 12th, 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
Status page incidents from the last 30 days for SendGrid
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
Started Mar 8, 2026 — Resolved Mar 8, 2026
Mar 7, 20:00 PST Completed - The scheduled maintenance has been completed.Mar 7, 16:00 PST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Feb 27, 14:47 PST Scheduled - In order to increase the stability and scalability of our systems, we are performing scheduled maintenance on our infrastructure on Saturday, March 7th, from 4PM-8PM PDT. During this time, customers may not be able to create new accounts, users, subusers, teammates, or API keys
Started Mar 7, 2026 — Resolved Mar 7, 2026
Mar 6, 18:13 PST Completed - The scheduled maintenance has been completed.Feb 23, 10:23 PST Update - Scheduled maintenance is still in progress. We will provide updates as necessary.Feb 23, 10:02 PST Update - From Monday February 23rd - Friday March 6th, our legacy webhook infrastructure will be disabled for 12 hours daily, then re-enabled, affecting webhook deliveries.Feb 18, 12:04 PST Update - Scheduled maintenance is still in progress. We will provide updates as necessary.Feb 17, 14:36 PST U
Started Mar 5, 2026 — Resolved Mar 5, 2026
Mar 5, 11:14 PST Resolved - Between 8:53 AM and 9:37 AM PST, customers may have experienced delays in email event processing, including click and open data. Our Engineers identified a bottleneck, and have resolved the issue. While email delivery continued with low execution times, the reporting of these events to the Stats API and your dashboard was delayed. However, all downstream queues, including Engagement Stats, have fully caught up as of 9:45 AM PST and are resolved at the time.
Started Mar 4, 2026 — Resolved Mar 4, 2026
Mar 4, 08:44 PST Resolved - Our engineers have investigated and resolved an issue that occurred causing delays in timezone updates. On 03/03 ~2:09PM customers would have seen errors in the console when trying to update their timezone setting or while fetching timezones via /v3/timezones. A fix was deployed a fix on 03/04 ~7:48AM. This issuse has now been resolved
Started Mar 4, 2026 — Resolved Mar 4, 2026
Mar 4, 07:30 PST Resolved - Our engineers have investigated and resolved the issues that began on 3/4/2026 from 8am PST to 3/9/2026 at 5pm PST that impacted the reporting for a subset of group unsubscribe and group resubscribe Event Webhooks. Users may have experienced issues with group unsubscribes and group resubscribes that were not processed, although the api calls for those events were processed. The issue has been resolved and all impacted services are operating normally.
Started Mar 3, 2026 — Resolved Mar 3, 2026
Mar 2, 17:17 PST Resolved - Between 4:00 PM and 5:04 PM PST, customers may have experienced delays when viewing Global Stats. Our Engineers identified and resolved the issue
Started Mar 3, 2026 — Resolved Mar 3, 2026
Mar 2, 17:05 PST Resolved - Between 4:00pm to 4:30pm PT, some mail delivery were delayed. There was no data loss or API unavailability. Our Engineers identified and resolved the issue.
Started Mar 2, 2026 — Resolved Mar 2, 2026
Mar 2, 11:06 PST Resolved - Our engineers have confirmed this issue is now resolved. Customers in Argentina should now be able to authenticate and add credit cards successfully. If you are located in Argentina and are still experiencing issues adding or authenticating a credit card, please reach out to Support for additional assistance.Feb 27, 15:02 PST Update - Our engineering team is continuing to monitor system performance. For customers located in Argentina impacted by this issue, please r
Started Mar 1, 2026 — Resolved Mar 1, 2026
Feb 28, 18:00 PST Completed - The scheduled maintenance has been completed.Feb 28, 14:00 PST In progress - Scheduled maintenance is currently in progress. We will provide updates as necessary.Feb 19, 07:47 PST Update - In order to increase the stability and scalability of our systems, we are performing scheduled maintenance on our infrastructure on February 28, from 2PM to 6PM PT. During this time, customers may experience failures when trying to create, update or delete lists, custom fields, se
Started Feb 26, 2026 — Resolved Feb 26, 2026
Feb 26, 11:23 PST Resolved - Our engineers have investigated and resolved an issue that caused high latency when sending email through SendGrid. From 8:24 AM PST to 9:15 AM PST on Thursday, February 26, 2026, customers may have experienced delays sending email from both the SendGrid dashboard (web app) and email sent via SMTP or API. The issue has been resolved, and all SendGrid email sending is operating normally across the dashboard, SMTP, and API.
Started Feb 12, 2026 — Resolved Feb 12, 2026
Feb 12, 10:36 PST Resolved - Our engineers have monitored the fix and confirmed the issue with Advanced Statistics has been resolved. All services are now operating normally at this time.Feb 12, 06:42 PST Update - Our engineering team has identified the root cause of the issue and is continuing to work on implementing a fix. We will provide the next update in four hours or as soon as additional information becomes available.Feb 12, 03:02 PST Update - Our engineering team has identified the root
Started Feb 11, 2026 — Resolved Feb 11, 2026
Feb 11, 12:33 PST Resolved - Our engineers have monitored the fix and confirmed the issue with Ticket Creation within the SendGrid Help Center has been resolved. All services are now operating normally at this time.Feb 11, 11:35 PST Update - We are continuing to monitor for any issues. We will provide another update in an hour or as soon as more information becomes available.Feb 11, 10:43 PST Update - We are continuing to monitor for any issues. We will provide another update in an hour or as so
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 159ms at the 99th percentile.
How reliable is SendGrid?
From December 12th to March 12th, 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.