SupportBox (CZ) email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), SupportBox (CZ) is the SaaS sender for 301 domains — 0.05% of 637,420 SPF-publishing domains. Its strongest TLD is .cz (58.5% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 DNS snapshot.
What SupportBox (CZ) represents in this dataset
Czech helpdesk SaaS for SMB customer support.
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 SupportBox (CZ)
Across 25 distinct TLDs its top three are .cz (58.5%), .sk (13.0%), .hu (6.6%) — together 78.1% of the 301 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, 73 domains, 24.3% of them), followed by Microsoft 365 (14.6%). 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 SupportBox (CZ)
What else the same 301 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of SupportBox (CZ) users |
|---|---|---|---|
| Mailbox | Google Workspace | 73 | 24.3% |
| Mailbox | Microsoft 365 | 44 | 14.6% |
| Mailbox | Shoptet (CZ) | 36 | 12.0% |
| Mailbox | Unknown / Other | 30 | 10.0% |
| Mailbox | Self-Hosted | 21 | 7.0% |
| Mailbox | Seznam.cz (Czech) | 20 | 6.6% |
TLD distribution (top 25 of 25)
Frequently asked questions
How many domains use SupportBox (CZ)?
301 domains in the Tranco top-1M use SupportBox (CZ) as their SaaS sender as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is SupportBox (CZ)'s market share?
SupportBox (CZ) holds 0.05% of SPF-publishing domains in the Tranco top-1M (snapshot of 2026-09-24). The number is recomputed every day.
What are the biggest alternatives to SupportBox (CZ)?
The largest SaaS senders in the same category by Tranco top-1M share are: Shopify, Pardot (Salesforce), CodeTwo Email Signatures 365, KnowBe4, Statuspage (Atlassian) (as of 2026-09-24).
Largest SaaS senders in this category
Shopify (0.84%) · Pardot (Salesforce) (0.75%) · CodeTwo Email Signatures 365 (0.71%) · KnowBe4 (0.54%) · Statuspage (Atlassian) (0.33%) · Trustpilot (0.30%) · Firebase (Google) (0.29%) · Atlassian (Jira/Confluence) (0.28%) · BigCommerce (0.27%) · Lark / Feishu (0.20%)
Domain sample (top 100 by Tranco rank)
Showing 100 of 301 domains.