Kayako SaaS sender
According to Live Direct Marketing's daily Tranco top-1M scan (September 14, 2026), Kayako is the SaaS sender for 98 domains — 0.02% of 637,677 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 98 domains in the Tranco top-1M use Kayako (0.02% of SPF-publishing domains).
- Snapshot date: 2026-09-14 — recomputed every day.
- Strongest TLD: .com (56.1% of its domains).
- Most co-used service: Google Workspace.
- Directory category: SaaS sender.
Why Kayako appears in this category
Kayako — customer service helpdesk.
We classify it as a SaaS sender from include: mechanisms in the SPF record matching a maintained provider rule. This is infrastructure attribution from public DNS, not evidence of a direct contract or exclusive use.
Kayako is a customer service platform that manages helpdesk and ticketing for organisations, and it sends email from those organisations' own domains on their behalf. The platform operates shared multi-tenant mail infrastructure that appears in SPF records as an authorised mail sender for customer domains.
Kayako's SPF footprint is concentrated in smaller sites — predominantly in the .com space — rather than among enterprise brands; it is most commonly paired with Google Workspace. This distribution suggests that Kayako serves primarily small-to-medium businesses without dedicated email infrastructure, and receiving email flowing through Kayako endpoints is likely from an organisation of modest scale rather than an enterprise customer.
Where Kayako sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 0 | 0.0% |
| Top 100,000 | 24 | 24.5% |
| Top 1,000,000 | 74 | 75.5% |
| Unranked | 0 | 0.0% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 55 | 56.1% | |
| .se | 4 | 4.1% | |
| .org | 4 | 4.1% | |
| .ru | 3 | 3.1% | |
| .eu | 3 | 3.1% | |
| .net | 3 | 3.1% | |
| .ro | 3 | 3.1% | |
| .io | 2 | 2.0% | |
| .com.au | 2 | 2.0% | |
| .ai | 2 | 2.0% |
What Kayako users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 98 domains.
| Type | Service | Domains | Share of Kayako users |
|---|---|---|---|
| Mailbox | Google Workspace | 43 | 43.9% |
| Mailbox | Microsoft 365 | 31 | 31.6% |
| Mailbox | Self-Hosted | 7 | 7.1% |
| Mailbox | Generic / unmatched (mx*.*) | 6 | 6.1% |
| Mailbox | Unknown / Other | 3 | 3.1% |
| Mailbox | Mimecast | 2 | 2.0% |
Multi-tenant reputation and authentication isolation
Because Kayako sends mail from customer domains whilst operating shared infrastructure, the platform must strictly isolate authentication and reputation between unrelated organisations. Each customer domain's SPF and DKIM configuration establishes independent authentication, so one organisation's reputation does not automatically affect others using the same platform. Organisations using Kayako should verify their SPF and DKIM records are correctly configured to authorise the platform, and maintain independent monitoring of their own domain reputation.
See the full Kayako data page (KPI cards, trend, sample domains) →
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Frequently asked questions
What is Kayako and why does it appear in my email infrastructure?
Kayako is a customer service platform that sends support emails from your domain. It appears in your SPF record because mail flowing through Kayako's infrastructure requires your domain to explicitly authorise Kayako as a legitimate sender.
How many domains use Kayako?
98 domains in the Tranco top-1M use Kayako as their SaaS sender as of September 14, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Kayako common enough to affect email deliverability testing?
Kayako accounts for 0.02% 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.
Which countries or TLDs use Kayako most?
Kayako's largest TLD is .com (56.1% of its domains); it appears across 24 TLDs in total.