Q4 Inc email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 14, 2026), Q4 Inc is the email service provider (ESP) for 83 domains — 0.01% of 637,677 SPF-publishing domains. Its strongest TLD is .com (94.0% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-14 DNS snapshot.
What Q4 Inc represents in this dataset
Q4 — investor-relations communications and IR press distribution.
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.
What the 2026-09-14 snapshot shows about Q4 Inc
Across 6 distinct TLDs its top three are .com (94.0%), .ca (1.2%), .xyz (1.2%) — together 96.4% of the 83 domains, which makes the footprint narrow — three TLDs cover most of it, which is typical of a regional or single-market operator. The service most often observed on the same domains is Microsoft 365 (Mailbox, 28 domains, 33.7% of them), followed by Proofpoint (14.5%). 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 (2026-09-14); 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.
Commonly used together with Q4 Inc
What else the same 83 domains use — cross-tabulated from the same daily snapshot (2026-09-14).
| Type | Service | Domains | Share of Q4 Inc users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 28 | 33.7% |
| Mailbox | Proofpoint | 12 | 14.5% |
| Mailbox | Google Workspace | 11 | 13.3% |
| Mailbox | Mimecast | 10 | 12.0% |
| Mailbox | Cisco IronPort | 5 | 6.0% |
| Mailbox | Self-Hosted | 4 | 4.8% |
| ESP | Salesforce | 24 | 28.9% |
| ESP | Mimecast | 13 | 15.7% |
| ESP | HubSpot | 12 | 14.5% |
| ESP | Amazon SES | 11 | 13.3% |
TLD distribution (top 6 of 6)
Frequently asked questions
How many domains use Q4 Inc?
83 domains in the Tranco top-1M use Q4 Inc as their email service provider (ESP) as of September 14, 2026, according to Live Direct Marketing's daily DNS scan.
What is Q4 Inc's market share?
Q4 Inc holds 0.01% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-14). The number is recomputed every day.
What are the biggest alternatives to Q4 Inc?
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 2026-09-14).
Largest email service provider (ESP)s in this category
Amazon SES (6.16%) · SendGrid (Twilio) (4.62%) · Mailgun (4.00%) · Zendesk (3.75%) · Mailchimp (3.57%) · Mandrill (3.24%) · HubSpot (3.11%) · Salesforce (2.54%) · Mailjet (Sinch) (2.12%) · Cloudflare Email Routing (1.95%)
Domain sample (top 83 by Tranco rank)
Showing 83 of 83 domains.