KnowBe4 email provider statistics and deliverability context
← Email Stats homesaas
According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), KnowBe4 is the SaaS sender for 3,459 domains — 0.54% of 637,420 SPF-publishing domains. Its share has been stable over the last 30 days. Its strongest TLD is .com (55.5% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 DNS snapshot.
What KnowBe4 represents in this dataset
KnowBe4 — security awareness training and simulated phishing platform, the largest vendor in that category.
Directory category: Saas. 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 KnowBe4
Across 149 distinct TLDs its top three are .com (55.5%), .org (11.9%), .edu (4.3%) — together 71.7% of the 3,459 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, 1,924 domains, 55.6% of them), followed by Google Workspace (14.3%). Its share of SPF-publishing domains has not moved measurably in 30 days. Directly comparable by the same detection rule: Shopify, Pardot (Salesforce), CodeTwo Email Signatures 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 (2026-09-24); 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 KnowBe4
What else the same 3,459 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of KnowBe4 users |
|---|---|---|---|
| Mailbox | Microsoft 365 | 1,924 | 55.6% |
| Mailbox | Google Workspace | 496 | 14.3% |
| Mailbox | Mimecast | 278 | 8.0% |
| Mailbox | Proofpoint | 146 | 4.2% |
| Mailbox | Unknown / Other | 128 | 3.7% |
| Mailbox | Barracuda | 117 | 3.4% |
TLD distribution (top 30 of 149)
Frequently asked questions
How many domains use KnowBe4?
3,459 domains in the Tranco top-1M use KnowBe4 as their SaaS sender as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is KnowBe4's market share?
KnowBe4 holds 0.54% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
Is KnowBe4 growing or declining?
KnowBe4's share has been stable over the last 30 days (±0.01 pp).
What are the biggest alternatives to KnowBe4?
The largest SaaS senders in the same category by Tranco top-1M share are: Shopify, Pardot (Salesforce), CodeTwo Email Signatures 365, Statuspage (Atlassian), Trustpilot (as of 2026-09-24).
Largest SaaS senders in this category
Shopify (0.84%) · Pardot (Salesforce) (0.75%) · CodeTwo Email Signatures 365 (0.71%) · Statuspage (Atlassian) (0.33%) · Trustpilot (0.30%) · Firebase (Google) (0.29%) · Atlassian (Jira/Confluence) (0.28%) · BigCommerce (0.27%) · Lark / Feishu (0.20%) · Sage Intacct (0.18%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 3,459 domains.