Klaviyo email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), Klaviyo is the email service provider (ESP) for 588 domains — 0.09% of 629,828 SPF-publishing domains. Its strongest TLD is .com (68.0% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-12 DNS snapshot.
What Klaviyo represents in this dataset
E-commerce-focused marketing automation, dominant on Shopify.
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 2026-09-12 snapshot shows about Klaviyo
Across 48 distinct TLDs its top three are .com (68.0%), .co.uk (3.7%), .com.au (3.4%) — together 75.2% of the 588 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 Google Workspace (Mailbox, 320 domains, 54.4% of them), followed by Microsoft 365 (25.5%). 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 (2026-09-12); 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 Klaviyo
What else the same 588 domains use — cross-tabulated from the same daily snapshot (2026-09-12).
| Type | Service | Domains | Share of Klaviyo users |
|---|---|---|---|
| Mailbox | Google Workspace | 320 | 54.4% |
| Mailbox | Microsoft 365 | 150 | 25.5% |
| Mailbox | Self-Hosted | 15 | 2.6% |
| Mailbox | Unknown / Other | 11 | 1.9% |
| Mailbox | Mimecast | 9 | 1.5% |
| Mailbox | Proofpoint Essentials | 8 | 1.4% |
| ESP | Zendesk | 110 | 18.7% |
| ESP | SendGrid (Twilio) | 90 | 15.3% |
| ESP | Mailgun | 87 | 14.8% |
| ESP | Amazon SES | 48 | 8.2% |
TLD distribution (top 30 of 48)
Frequently asked questions
How many domains use Klaviyo?
588 domains in the Tranco top-1M use Klaviyo as their email service provider (ESP) as of September 12, 2026, according to Live Direct Marketing's daily DNS scan.
What is Klaviyo's market share?
Klaviyo holds 0.09% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-12). The number is recomputed every day.
What are the biggest alternatives to Klaviyo?
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 2026-09-12).
Largest email service provider (ESP)s in this category
Amazon SES (6.18%) · SendGrid (Twilio) (4.63%) · Mailgun (4.01%) · Zendesk (3.76%) · Mailchimp (3.57%) · Mandrill (3.25%) · HubSpot (3.11%) · Salesforce (2.55%) · Mailjet (Sinch) (2.12%) · Cloudflare Email Routing (1.94%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 588 domains.