k.io (workspace) email provider statistics and deliverability context
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According to Live Direct Marketing's daily Tranco top-1M scan (September 24, 2026), k.io (workspace) is the SaaS sender for 345 domains — 0.05% of 637,420 SPF-publishing domains. Its strongest TLD is .co.uk (36.2% of its domains). Detection: include: mechanisms in the SPF record.
Last updated from the 2026-09-24 DNS snapshot.
What k.io (workspace) represents in this dataset
Workspace.com / k.io — collaboration platform.
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 k.io (workspace)
Across 36 distinct TLDs its top three are .co.uk (36.2%), .com (29.0%), .org.uk (7.0%) — together 72.2% of the 345 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 Krystal Hosting (UK) (Mailbox, 170 domains, 49.3% of them), followed by Generic / unmatched (mx*.*) (24.9%). 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 k.io (workspace)
What else the same 345 domains use — cross-tabulated from the same daily snapshot (2026-09-24).
| Type | Service | Domains | Share of k.io (workspace) users |
|---|---|---|---|
| Mailbox | Krystal Hosting (UK) | 170 | 49.3% |
| Mailbox | Generic / unmatched (mx*.*) | 86 | 24.9% |
| Mailbox | Microsoft 365 | 34 | 9.9% |
| Mailbox | Google Workspace | 30 | 8.7% |
| Mailbox | Unknown / Other | 8 | 2.3% |
| Mailbox | Self-Hosted | 8 | 2.3% |
TLD distribution (top 30 of 36)
Frequently asked questions
How many domains use k.io (workspace)?
345 domains in the Tranco top-1M use k.io (workspace) as their SaaS sender as of September 24, 2026, according to Live Direct Marketing's daily DNS scan.
What is k.io (workspace)'s market share?
k.io (workspace) 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 k.io (workspace)?
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 345 domains.