esp
According to Live Direct Marketing's daily Tranco top-1M scan (July 26, 2026), SparkPost is the email service provider (ESP) for 2,669 domains — 0.42% of 630,738 SPF-publishing domains. Its share has been stable over the last 30 days. Its strongest TLD is .com (47.1% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-07-26 DNS snapshot.
MessageBird-owned high-volume transactional email backbone.
Directory category: Esp. The classification comes from include: mechanisms in the SPF record. It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
Across 137 distinct TLDs its top three are .com (47.1%), .cz (8.8%), .org (7.0%) — together 62.9% of the 2,669 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Google Workspace (Mailbox, 1,104 domains, 41.4% of them), followed by Microsoft 365 (22.9%). Its share of SPF-publishing domains has not moved measurably in 30 days. Directly comparable by the same detection rule: Amazon SES, SendGrid (Twilio), Mailgun. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-07-26); a domain appears here when its published records match the include: mechanisms in the SPF record rule, which is an infrastructure fact, not a commercial relationship.
What else the same 2,669 domains use — cross-tabulated from the same daily snapshot (2026-07-26).
| Type | Service | Domains | Share of SparkPost users |
|---|---|---|---|
| Mailbox | Google Workspace | 1,104 | 41.4% |
| Mailbox | Microsoft 365 | 610 | 22.9% |
| Mailbox | Self-Hosted | 247 | 9.3% |
| Mailbox | Unknown / Other | 136 | 5.1% |
| Mailbox | Mimecast | 64 | 2.4% |
| Mailbox | Generic / unmatched (mx*.*) | 50 | 1.9% |
| ESP | Mandrill | 381 | 14.3% |
| ESP | Amazon SES | 375 | 14.1% |
| ESP | Zendesk | 294 | 11.0% |
| ESP | Mailchimp | 290 | 10.9% |
2,669 domains in the Tranco top-1M use SparkPost as their email service provider (ESP) as of July 26, 2026, according to Live Direct Marketing's daily DNS scan.
SparkPost holds 0.42% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-07-26). The number is recomputed every day.
SparkPost's share has been stable over the last 30 days (±0.01 pp).
The largest email service provider (ESP)s in the same category by Tranco top-1M share are: Amazon SES, SendGrid (Twilio), Mailgun, Zendesk, Mailchimp (as of 2026-07-26).
Amazon SES (6.17%) · SendGrid (Twilio) (4.76%) · Mailgun (4.11%) · Zendesk (3.83%) · Mailchimp (3.70%) · Mandrill (3.36%) · HubSpot (3.19%) · Salesforce (2.62%) · Mailjet (Sinch) (2.13%) · Cloudflare Email Routing (1.82%)
Showing 100 of 2,669 domains.