Barracuda email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 11, 2026), Barracuda is the mailbox provider for 3,373 domains — 0.51% of 666,213 domains with MX records. Over the last 30 days its share declined by 0.01 pp. Its strongest TLD is .com (49.7% of its domains). Detection: primary MX record (lowest preference).
Last updated from the 2026-09-11 DNS snapshot.
What Barracuda represents in this dataset
Mid-market email security and backup.
Directory category: Gateway. The classification comes from primary MX record (lowest preference). It describes observed DNS infrastructure, not a commercial relationship and not the placement of any individual message.
What the 2026-09-11 snapshot shows about Barracuda
Across 115 distinct TLDs its top three are .com (49.7%), .org (15.5%), .edu (4.0%) — together 69.2% of the 3,373 domains, which makes the footprint moderately concentrated, with a recognisable home market. The service most often observed on the same domains is Barracuda Essentials (ESP, 1,691 domains, 50.1% of them), followed by Amazon SES (10.3%). Its share of domains with MX records moved -0.01 pp in 30 days — inside the daily noise of list rotation. Directly comparable by the same detection rule: Self-Hosted, Google Workspace, Microsoft 365. Ranking between them reflects what is published in DNS, not delivery quality or volume sent. All figures come from a single daily DNS snapshot (2026-09-11); a domain appears here when its published records match the primary MX record (lowest preference) rule, which is an infrastructure fact, not a commercial relationship.
Commonly used together with Barracuda
What else the same 3,373 domains use — cross-tabulated from the same daily snapshot (2026-09-11).
| Type | Service | Domains | Share of Barracuda users |
|---|---|---|---|
| ESP | Barracuda Essentials | 1,691 | 50.1% |
| ESP | Amazon SES | 348 | 10.3% |
| ESP | SendGrid (Twilio) | 338 | 10.0% |
| ESP | Salesforce | 298 | 8.8% |
| ESP | HubSpot | 287 | 8.5% |
| ESP | Barracuda Email Security | 284 | 8.4% |
| ESP | Mailchimp | 283 | 8.4% |
| ESP | Mandrill | 248 | 7.4% |
| ESP | Mailgun | 218 | 6.5% |
| ESP | Zendesk | 162 | 4.8% |
TLD distribution (top 30 of 115)
Frequently asked questions
How many domains use Barracuda?
3,373 domains in the Tranco top-1M use Barracuda as their mailbox provider as of September 11, 2026, according to Live Direct Marketing's daily DNS scan.
What is Barracuda's market share?
Barracuda holds 0.51% of domains with MX records in the Tranco top-1M (snapshot of 2026-09-11). The number is recomputed every day.
Is Barracuda growing or declining?
Barracuda's share declined by 0.01 percentage points over the last 30 days (as of September 11, 2026).
What are the biggest alternatives to Barracuda?
The largest mailbox providers in the same category by Tranco top-1M share are: Self-Hosted, Google Workspace, Microsoft 365, Unknown / Other, Generic / unmatched (mx*.*) (as of 2026-09-11).
Largest mailbox providers in this category
Self-Hosted (22.45%) · Google Workspace (21.65%) · Microsoft 365 (16.96%) · Unknown / Other (6.58%) · Generic / unmatched (mx*.*) (2.53%) · Generic / unmatched (mail.*) (1.94%) · Proofpoint (1.88%) · Cloudflare Email Routing (1.74%) · Yandex 360 (1.61%) · Mimecast (1.46%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 3,373 domains.