According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Echobox is the SaaS sender for 131 domains — 0.02% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Echobox is a software-as-a-service email platform that sends mail on behalf of client domains. It integrates with a domain's email infrastructure via SPF include mechanisms.
Echobox's footprint in SPF records is concentrated amongst smaller and mid-market sites rather than enterprise brands, and geographically spread across international domains with notable concentration in Norway (.no). It frequently appears alongside unknown or unclassified sender types, indicating a diverse customer base across different vertical markets and geographies.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.8% |
| Top 10,000 | 3 | 2.3% |
| Top 100,000 | 40 | 30.5% |
| Top 1,000,000 | 84 | 64.1% |
| Unranked | 3 | 2.3% |
| TLD | Domains | Share | |
|---|---|---|---|
| .no | 46 | 35.1% | |
| .com | 37 | 28.2% | |
| .nl | 10 | 7.6% | |
| .se | 6 | 4.6% | |
| .fr | 4 | 3.1% | |
| .es | 4 | 3.1% | |
| .cl | 3 | 2.3% | |
| .media | 2 | 1.5% | |
| .com.br | 2 | 1.5% | |
| .com.tw | 1 | 0.8% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 131 domains.
| Type | Service | Domains | Share of Echobox users |
|---|---|---|---|
| Mailbox | Unknown / Other | 46 | 35.1% |
| Mailbox | Google Workspace | 38 | 29.0% |
| Mailbox | Microsoft 365 | 33 | 25.2% |
| Mailbox | Self-Hosted | 7 | 5.3% |
| Mailbox | United Domains (DE) | 1 | 0.8% |
| Mailbox | Proofpoint | 1 | 0.8% |
When a domain authorises Echobox to send mail on its behalf, it publishes an SPF include pointing to Echobox's mail server IP ranges. This delegation simplifies the sender's SPF record but ties the domain's email reputation to Echobox's operational practices and IP management. Receiving mailbox providers evaluate Echobox-sourced mail against the customer domain's sending patterns; poor list hygiene or abuse by one Echobox customer can affect shared IP pools, making Echobox's infrastructure and compliance practices relevant to any domain using it.
See the full Echobox data page (KPI cards, trend, sample domains) →
Echobox is a third-party email service provider that sends mail on behalf of client domains via outbound infrastructure. It appears in email authentication records as an SPF include mechanism.
131 domains in the Tranco top-1M use Echobox as their SaaS sender as of July 13, 2026 (0.02% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Echobox 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.
Echobox's largest TLD is .no (35.1% of its domains); it appears across 26 TLDs in total.