Lark / Feishu SaaS sender
According to Live Direct Marketing's daily Tranco top-1M scan (September 12, 2026), Lark / Feishu is the SaaS sender for 1,286 domains — 0.20% of 629,828 SPF-publishing domains. Detection method: include: mechanisms in the SPF record.
Key facts
- 1,286 domains in the Tranco top-1M use Lark / Feishu (0.20% of SPF-publishing domains).
- Snapshot date: 2026-09-12 — recomputed every day.
- 30-day share change: +0.00 pp.
- Strongest TLD: .com (56.1% of its domains).
- Most co-used service: Lark / Feishu (ByteDance).
- Directory category: SaaS sender.
Why Lark / Feishu appears in this category
Lark (Feishu in China) — ByteDance collaboration suite combining chat, docs, calendar and email for enterprises.
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.
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.
Where Lark / Feishu sits in the Tranco ranking
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 1 | 0.1% |
| Top 10,000 | 21 | 1.6% |
| Top 100,000 | 187 | 14.5% |
| Top 1,000,000 | 1,070 | 83.2% |
| Unranked | 7 | 0.5% |
Top-level domain split
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 721 | 56.1% | |
| .ai | 94 | 7.3% | |
| .cn | 47 | 3.7% | |
| .net | 40 | 3.1% | |
| .vn | 38 | 3.0% | |
| .io | 38 | 3.0% | |
| .org | 24 | 1.9% | |
| .id | 15 | 1.2% | |
| .app | 14 | 1.1% | |
| .me | 12 | 0.9% |
What Lark / Feishu users also use
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,286 domains.
| Type | Service | Domains | Share of Lark / Feishu users |
|---|---|---|---|
| Mailbox | Lark / Feishu (ByteDance) | 1,206 | 93.8% |
| Mailbox | Google Workspace | 36 | 2.8% |
| Mailbox | Microsoft 365 | 12 | 0.9% |
| Mailbox | Self-Hosted | 9 | 0.7% |
| Mailbox | Unknown / Other | 8 | 0.6% |
| Mailbox | QQ Mail (Tencent) | 5 | 0.4% |
SPF configuration and Lark's authentication chain
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) →
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Frequently asked questions
What does a Lark SPF include mean for my email configuration?
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.
How many domains use Lark / Feishu?
1,286 domains in the Tranco top-1M use Lark / Feishu as their SaaS sender as of September 12, 2026 (0.20% of SPF-publishing domains), according to Live Direct Marketing's daily DNS scan.
Is Lark / Feishu common enough to affect email deliverability testing?
Lark / Feishu accounts for 0.20% 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.
Is Lark / Feishu growing or declining?
Lark / Feishu has been stable — its share moved +0.00 pp over the last 30 days (as of September 12, 2026).
Which countries or TLDs use Lark / Feishu most?
Lark / Feishu's largest TLD is .com (56.1% of its domains); it appears across 101 TLDs in total.