According to Live Direct Marketing's daily Tranco top-1M scan (July 13, 2026), Lark / Feishu (ByteDance) is the mailbox provider for 1,258 domains — 0.19% of 658,711 domains with MX records. Detection method: primary MX record (lowest preference).
Lark is a unified collaboration platform owned by ByteDance, known as Feishu in mainland China, that combines messaging, calendar, document collaboration, and email functionality. When organisations adopt Lark, they can route incoming email through its infrastructure, establishing it as a mailbox provider within the broader email ecosystem.
In infrastructure terms, Lark occupies the long tail rather than the top tier—it appears far more often in smaller and mid-sized websites than in the largest global brands. Its footprint concentrates in the .com domain space, with particular prevalence among global and US-based organisations. Notably, Lark deployments frequently appear alongside other modern SaaS tools like Zendesk, indicating that its adoption correlates with organisations already committed to unified, software-as-a-service tooling.
| Tranco rank band | Domains | Share of its base |
|---|---|---|
| Top 1,000 | 0 | 0.0% |
| Top 10,000 | 20 | 1.6% |
| Top 100,000 | 188 | 14.9% |
| Top 1,000,000 | 864 | 68.7% |
| Unranked | 186 | 14.8% |
| TLD | Domains | Share | |
|---|---|---|---|
| .com | 722 | 57.4% | |
| .ai | 87 | 6.9% | |
| .cn | 57 | 4.5% | |
| .io | 38 | 3.0% | |
| .vn | 37 | 2.9% | |
| .net | 37 | 2.9% | |
| .org | 17 | 1.4% | |
| .cc | 13 | 1.0% | |
| .id | 12 | 1.0% | |
| .xyz | 11 | 0.9% |
Cross-tabulated from the same daily snapshot — the other email services seen on the same 1,258 domains.
| Type | Service | Domains | Share of Lark / Feishu (ByteDance) users |
|---|---|---|---|
| ESP | Zendesk | 67 | 5.3% |
| ESP | Mailgun | 29 | 2.3% |
| ESP | Amazon SES | 27 | 2.1% |
| ESP | Alibaba DirectMail (APAC) | 14 | 1.1% |
| ESP | MailerSend | 12 | 1.0% |
| ESP | SendGrid (Twilio) | 9 | 0.7% |
| ESP | Brevo (ex-Sendinblue) | 7 | 0.6% |
| ESP | Alibaba DirectMail | 7 | 0.6% |
| ESP | Zoho ZeptoMail | 5 | 0.4% |
| ESP | Elastic Email | 5 | 0.4% |
For senders whose mail reaches small-to-mid-size organisations or companies operating within a contemporary SaaS ecosystem, Lark-hosted inboxes merit inclusion in email deliverability testing. Senders targeting large enterprises or consumer markets will encounter Lark less frequently and may prioritise testing against providers with broader distribution. Understanding Lark's user base helps senders tailor their testing strategy to their actual audience rather than testing against all providers uniformly.
See the full Lark / Feishu (ByteDance) data page (KPI cards, trend, sample domains) →
Lark operates in the long tail of mail infrastructure, serving primarily small-to-mid-size organisations rather than the largest global brands. If you send to SaaS-heavy or enterprise-software audiences, Lark's prevalence in your recipient list may be much higher; conversely, for consumer or large-enterprise sends, it will appear less frequently.
1,258 domains in the Tranco top-1M use Lark / Feishu (ByteDance) as their mailbox provider as of July 13, 2026 (0.19% of domains with MX records), according to Live Direct Marketing's daily DNS scan.
Lark / Feishu (ByteDance) accounts for 0.19% of domains with MX records 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 (ByteDance)'s largest TLD is .com (57.4% of its domains); it appears across 94 TLDs in total.