According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), SendGrid (Twilio) is the email service provider (ESP) for 29,392 domains — 4.76% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
SendGrid is a transactional and marketing email platform owned by Twilio. It provides SMTP relay and APIs to send automated emails—order confirmations, password resets, notifications—without operating a dedicated mail server.
SendGrid's SPF footprint clusters in smaller and mid-market organisations rather than major enterprises, predominantly across .com domains. It appears frequently alongside Google Workspace in SPF configurations, suggesting adoption among teams who use Google for user email but need dedicated infrastructure for system-generated mail.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 48 | 0.2% |
| Top 10,000 | 471 | 1.6% |
| Top 100,000 | 4,137 | 14.1% |
| Top 1,000,000 | 22,505 | 76.6% |
| Unranked | 2,231 | 7.6% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 15,926 | 54.2% | |
| .org | 1,699 | 5.8% | |
| .com.br | 1,624 | 5.5% | |
| .co.uk | 736 | 2.5% | |
| .net | 677 | 2.3% | |
| .nl | 526 | 1.8% | |
| .io | 518 | 1.8% | |
| .com.au | 511 | 1.7% | |
| .de | 352 | 1.2% | |
| .ca | 330 | 1.1% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 29,392 domains.
| Type | Service | Domains | Share of SendGrid (Twilio) users |
|---|---|---|---|
| Mailbox | Google Workspace | 11,615 | 39.5% |
| Mailbox | Microsoft 365 | 9,115 | 31.0% |
| Mailbox | Self-Hosted | 1,450 | 4.9% |
| Mailbox | Unknown / Other | 1,170 | 4.0% |
| Mailbox | Mimecast | 1,043 | 3.5% |
| Mailbox | Proofpoint | 674 | 2.3% |
| ESP | Amazon SES | 4,107 | 14.0% |
| ESP | Zendesk | 3,950 | 13.4% |
| ESP | HubSpot | 3,253 | 11.1% |
| ESP | Mailchimp | 3,066 | 10.4% |
Organisations using SendGrid alongside Google Workspace must include both include:sendgrid.net and Google's SPF mechanisms (typically include:google.com or an ASP MX include) in their SPF record. If either is misconfigured or omitted, mail from that provider will fail SPF authentication at the recipient's mail server, causing delivery failures or spam folder placement. This is especially problematic for transactional mail relayed through SendGrid—a missed SPF include means password resets and order confirmations will fail authentication regardless of DKIM or DMARC alignment.
See the full SendGrid (Twilio) data page (KPI cards, trend, sample domains) →
No. SendGrid is an outbound mail relay, not a mailbox provider; test against the mailbox services your recipients actually use instead.
29,392 domains in the Tranco top-1M use SendGrid (Twilio) as their email service provider (ESP) as of July 13, 2026 (4.76% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
SendGrid (Twilio) accounts for 4.76% of SPF-publishing domains in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
SendGrid (Twilio) has been stable — its share moved +0.01 pp over the last 30 days (as of July 13, 2026).
SendGrid (Twilio)'s largest TLD is .com (54.2% of its domains); it appears across 364 TLDs in total.