AppRiver (Zix) email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), AppRiver (Zix) is the email service provider (ESP) for 120 domains — 0.02% of 637,420 SPF-publishing domains. Its strongest TLD is .com (71.7% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 DNS snapshot.
What AppRiver (Zix) represents in this dataset
AppRiver (Zix/OpenText) — secure email + spam filter.
Directory category: Gateway. 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 2026-09-24 snapshot shows about AppRiver (Zix)
Across 9 distinct TLDs its top three are .com (71.7%), .org (15.0%), .net (4.2%) — together 90.8% of the 120 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 Unknown / Other (Mailbox, 72 domains, 60.0% of them), followed by Microsoft 365 (21.7%). 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 (2026-09-24); 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 AppRiver (Zix)
What else the same 120 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of AppRiver (Zix) users |
|---|---|---|---|
| Mailbox | Unknown / Other | 72 | 60.0% |
| Mailbox | Microsoft 365 | 26 | 21.7% |
| Mailbox | Google Workspace | 8 | 6.7% |
| Mailbox | Mimecast | 5 | 4.2% |
| Mailbox | Proofpoint Essentials | 2 | 1.7% |
| Mailbox | easyDNS | 1 | 0.8% |
| ESP | Amazon SES | 18 | 15.0% |
| ESP | HubSpot | 14 | 11.7% |
| ESP | SendGrid (Twilio) | 14 | 11.7% |
| ESP | Mandrill | 12 | 10.0% |
TLD distribution (top 9 of 9)
Frequently asked questions
How many domains use AppRiver (Zix)?
120 domains in the Tranco top-1M use AppRiver (Zix) as their email service provider (ESP) as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is AppRiver (Zix)'s market share?
AppRiver (Zix) holds 0.02% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to AppRiver (Zix)?
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 2026-09-24).
Largest email service provider (ESP)s in this category
Amazon SES (6.23%) · SendGrid (Twilio) (4.68%) · Mailgun (4.01%) · Zendesk (3.77%) · Mailchimp (3.61%) · Mandrill (3.26%) · HubSpot (3.18%) · Salesforce (2.57%) · Mailjet (Sinch) (2.14%) · Cloudflare Email Routing (1.96%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 120 domains.