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 → | 25 | 25 |
From June 2nd to August 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, 25 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 |
|---|---|---|---|
21ms | 76ms | 82ms | 238ms |
From June 2nd to August 31st, SendGrid averaged a daily median response time (p50) of 21ms across all days in the range, meaning half of all requests on a typical day complete in under 21ms. The 99th percentile averaged 238ms, with a peak daily p99 of 1758ms. 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% | 0.00% | Jun 2 | 91 | 0 |
From June 2nd to August 31st, SendGrid averaged a 0.00% daily error rate for 5xx responses and timeouts, with the highest single-day error rate reaching 0.00%. 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 Oct 16, 2026
THIS IS A SCHEDULED EVENT Oct 16, 14:00 - 22:00 PDT Jul 29, 00:27 PDT Scheduled - Twilio will perform scheduled network maintenance in our IE1 region during an 8-hour window from 16 October 2026 at 14:00 PDT to 16 October 2026 at 22:00 PDT. During this window, customers may experience a brief service interruption of up to 90 seconds affecting the following: Interconnected Customers: All IE1 interconnected customers will experience a brief interconnection service interruption of up to 90 seco
Ongoing since Oct 1, 2026
THIS IS A SCHEDULED EVENT Sep 30, 20:00 PDT - Oct 1, 00:00 PDT Aug 12, 11:57 PDT Scheduled - Twilio is conducting a planned maintenance from 30 September 2026 at 20:00 PDT until 01 October 2026 at 00:00 PDT. During the maintenance window, there could be intermittent delays or failures delivering SMS and MMS to and from United States and Canada handsets via subset of long codes, short codes and toll free numbers.
Ongoing since Sep 24, 2026
THIS IS A SCHEDULED EVENT Sep 23, 20:00 PDT - Sep 24, 00:00 PDT Aug 12, 11:57 PDT Scheduled - Twilio is conducting a planned maintenance from 23 September 2026 at 20:00 PDT until 24 September 2026 at 00:00 PDT. During the maintenance window, there could be intermittent delays or failures delivering SMS and MMS to and from United States and Canada handsets via subset of long codes, short codes and toll free numbers.
Ongoing since Sep 22, 2026
THIS IS A SCHEDULED EVENT Sep 22, 15:00 - 21:00 PDT Aug 24, 23:50 PDT Scheduled - Our Voice carrier partner in the Czech Republic is conducting a planned maintenance from 22 September 2026 at 15:00 PDT until 22 September 2026 at 21:00 PDT. During the maintenance window, there could be intermittent call disconnects or call failures from and to Twilio Czech Republic phone numbers.
Ongoing since Sep 21, 2026
THIS IS A SCHEDULED EVENT Sep 21, 15:00 - 21:00 PDT Aug 24, 23:49 PDT Scheduled - Our Voice carrier partner in the Czech Republic is conducting a planned maintenance from 21 September 2026 at 15:00 PDT until 21 September 2026 at 21:00 PDT. During the maintenance window, there could be intermittent call disconnects or call failures from and to Twilio Czech Republic phone numbers.
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 21ms (p50) and 238ms at the 99th percentile.
How reliable is SendGrid?
From June 2nd to August 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.