WhoisXML API
Valuation
$4.8M
2025 Revenue
$4.2M
Funding
$0
Team
38
Founded
2010
How WhoisXML API CEO Jonathan Zhang grew WhoisXML API to $4.2M revenue with a 38 person team in 2025.
For more than 14 years, WhoisXML API has gathered, analyzed, and correlated domain, IP, and DNS data for a more secure and transparent Internet. We offer a vast selection of domain/IP/DNS data feeds, APIs, research and monitoring web tools and cyber threat intelligence. Our coverage includes 21+ billion historical WHOIS records across 7596+ TLDs and ccTLDs, 50+ billion domains and subdomains, 10.4+ million IP netblocks, 99.5% of IPs in use, and 116+ Billion DNS records gathered from over a decade of data aggregation. Our products and intelligence sources can support all types of security companies, enterprises, and experts to empower next-generation cybersecurity processes and as a building block for thorough online cybercrime investigations. We are a cyber threat intelligence provider trusted by over 50,000 clients and have been ranked one of Inc. 5000 fastest growing IT companies since 2017. Our customer base includes commercial security platforms (SIEM, SOAR, and TIP), Security Operations Centers (SOCs), Managed Security Service Providers (MSSPs), Fortune 1000 companies, top cybercrime & law enforcement units, government agencies, banks, payment processors, telcos, and brand protection agencies. We also work closely with domain registries/registrars, domain investors/brokers, marketing researchers, big-data warehouses, web analytics firms, investment funds, VC firms, SMBs with a digital footprint, and more.
Last updated
WhoisXML API Revenue
In 2025, WhoisXML API's revenue reached $4.2M. The company previously reported $1.6M in 2021. Since its launch in 2010, WhoisXML API has shown consistent revenue growth.
| Year | Milestone |
|---|---|
| 2025 | WhoisXML API Hit $4.2m revenue in December 2025 |
| 2021 | WhoisXML API Hit $1.6m revenue in October 2021 |
| 2010 | Launched with $0 revenue |
WhoisXML API Valuation, Funding Rounds
WhoisXML API's most recent disclosed valuation is $4.8M.
WhoisXML API is a bootstrapped Email Verification Software startup. Founded in 2010, WhoisXML API has grown to $4.2M in revenue without raising any venture capital or outside funding.
As a self-funded Email Verification Software SaaS company, WhoisXML API has built its business with no outside investment.
| Year | Round | Amount | Valuation | % Sold |
|---|
WhoisXML API Employees & Team Size
WhoisXML API employs approximately 38 people as of 2026, up from 35 in 2024.
WhoisXML API has 38 total employees in different roles and functions.
| Year | Milestone |
|---|---|
| 2025 | Reached 38 employees (December 2025) |
| 2024 | Reached 35 employees (November 2024) |
Founder / CEO
Q&A
| Question | Answer |
|---|---|
| What's your age? | - |
| Favorite online tool? | - |
| Favorite book? | - |
| Favorite CEO? | - |
| Advice for 20 year old self | - |
Customers
We do not have customer count information for WhoisXML API yet.
Frequently Asked Questions about WhoisXML API
What is WhoisXML API's revenue?
WhoisXML API generates $4.2M in revenue.
Who founded WhoisXML API?
WhoisXML API was founded by Jonathan Zhang.
Who is the CEO of WhoisXML API?
The CEO of WhoisXML API is Jonathan Zhang.
How much funding does WhoisXML API have?
WhoisXML API raised $0.
How many employees does WhoisXML API have?
WhoisXML API has 38 employees.
Where is WhoisXML API headquarters?
WhoisXML API is headquartered in Covina, California, United States.
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Compare WhoisXML API to the industry
WhoisXML API operates across multiple industries. Browse revenue, funding, and growth data for WhoisXML API in each sector below.
Source Attribution
Source: all data was collected from GetLatka company research and founder interviews. Revenue, funding, team, and customer figures are presented as company-reported or GetLatka-estimated metrics where the profile data identifies them that way.
Company data last updated .