According to Live Direct Marketing's daily Tranco top-1M scan (July 12, 2026), Klaviyo is the email service provider (ESP) for 552 domains — 0.09% of 617,244 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Klaviyo is a commercial email service provider and marketing automation platform operated as a shared sending infrastructure serving thousands of organisations worldwide.
Across the global DNS landscape, Klaviyo appears predominantly as an SPF include on smaller and mid-market websites, concentrated in the .com space and frequently deployed alongside Google Workspace. This pattern reflects its role serving a long tail of organisations rather than the world's largest brands, a fact that shapes how its infrastructure relates to filtering and reputation systems.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 1 | 0.2% |
| Top 100,000 | 20 | 3.6% |
| Top 1,000,000 | 424 | 76.8% |
| Unranked | 107 | 19.4% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 379 | 68.7% | |
| .co.uk | 22 | 4.0% | |
| .com.au | 19 | 3.4% | |
| .de | 18 | 3.3% | |
| .ca | 11 | 2.0% | |
| .co | 9 | 1.6% | |
| .nl | 7 | 1.3% | |
| .fr | 7 | 1.3% | |
| .es | 6 | 1.1% | |
| .co.nz | 5 | 0.9% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 552 domains.
| Type | Service | Domains | Share of Klaviyo users |
|---|---|---|---|
| Mailbox | Google Workspace | 306 | 55.4% |
| Mailbox | Microsoft 365 | 141 | 25.5% |
| Mailbox | Unknown / Other | 12 | 2.2% |
| Mailbox | Self-Hosted | 9 | 1.6% |
| Mailbox | Generic / unmatched (mx*.*) | 9 | 1.6% |
| Mailbox | Proofpoint Essentials | 8 | 1.4% |
| ESP | Zendesk | 101 | 18.3% |
| ESP | SendGrid (Twilio) | 91 | 16.5% |
| ESP | Mailgun | 82 | 14.9% |
| ESP | Amazon SES | 47 | 8.5% |
Because Klaviyo serves a broad base of smaller to mid-market organisations, its sending IP ranges carry reputation shaped by the aggregate behaviour of that customer base rather than a single brand. Organisations filtering inbound mail see Klaviyo's infrastructure as a shared channel, which means compromised accounts or poorly-managed lists on one customer can affect the reputation of all others sending through the same IPs. The concentration in the .com space and common pairing with Google Workspace deployments means Klaviyo traffic often originates from organisations using complementary, lower-complexity email stacks.
See the full Klaviyo data page (KPI cards, trend, sample domains) →
Klaviyo is a commercial email service provider and marketing automation platform serving smaller to mid-market organisations, concentrated in the .com space and often deployed alongside Google Workspace. Its shared sending infrastructure means reputation and filtering practices within Klaviyo's IP ranges are shaped by the aggregate behaviour of its entire customer base.
552 domains in the Tranco top-1M use Klaviyo as their email service provider (ESP) as of July 12, 2026 (0.09% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Klaviyo accounts for 0.09% of SPF-publishing domains in the top 1M. Whether you should seed a test mailbox there depends on how much of your audience it represents — the co-usage table above shows the services it appears alongside most.
Klaviyo's largest TLD is .com (68.7% of its domains); it appears across 47 TLDs in total.