According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Lark / Feishu is the SaaS sender for 1,289 domains — 0.21% of 617,702 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Lark is a unified workplace platform operated by ByteDance that provides email-sending capabilities alongside collaboration features. When organisations integrate Lark for communication workflows, they often authorise it to send mail on their domain via SPF include mechanisms.
Across the broader web, Lark's email footprint concentrates in smaller and mid-sized sites—predominantly in the .com namespace—rather than the largest global brands. For mailbox operators and senders, this distribution pattern means Lark spans a diverse base of origins, requiring careful assessment when evaluating reputation or setting email policy.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.1% |
| Top 10,000 | 22 | 1.7% |
| Top 100,000 | 193 | 15.0% |
| Top 1,000,000 | 891 | 69.1% |
| Unranked | 182 | 14.1% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 732 | 56.8% | |
| .ai | 91 | 7.1% | |
| .cn | 51 | 4.0% | |
| .vn | 43 | 3.3% | |
| .io | 43 | 3.3% | |
| .net | 38 | 2.9% | |
| .org | 16 | 1.2% | |
| .id | 14 | 1.1% | |
| .app | 13 | 1.0% | |
| .cc | 13 | 1.0% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,289 domains.
| Type | Service | Domains | Share of Lark / Feishu users |
|---|---|---|---|
| Mailbox | Lark / Feishu (ByteDance) | 1,193 | 92.6% |
| Mailbox | Google Workspace | 48 | 3.7% |
| Mailbox | Microsoft 365 | 10 | 0.8% |
| Mailbox | Self-Hosted | 10 | 0.8% |
| Mailbox | Unknown / Other | 8 | 0.6% |
| Mailbox | QQ Mail (Tencent) | 6 | 0.5% |
Lark's integration into a domain's email stack typically involves an SPF include: the domain publishes an include directive pointing to Lark's authorised sending infrastructure. This design centralises the management of Lark-sourced mail within Lark's published SPF record, reducing the burden on individual domain operators to maintain rows of individual IP ranges. However, it also means that the reputation and deliverability of Lark's mail-sending infrastructure directly affects every domain relying on that include.
See the full Lark / Feishu data page (KPI cards, trend, sample domains) →
A Lark SPF include authorises Lark's infrastructure to send mail on your behalf; mail claiming to originate from your domain but sent through Lark will be authenticated against Lark's published sending IPs. If Lark's infrastructure is compromised or its IPs are listed for spam, your domain's mail can be affected.
1,289 domains in the Tranco top-1M use Lark / Feishu as their SaaS sender as of July 13, 2026 (0.21% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Lark / Feishu accounts for 0.21% 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.
Lark / Feishu has been stable — its share moved -0.00 pp over the last 30 days (as of July 13, 2026).
Lark / Feishu's largest TLD is .com (56.8% of its domains); it appears across 95 TLDs in total.