Who.Is
Who.Is is a self-serve domain intelligence platform that provides free WHOIS, RDAP, DNS, and IP lookups alongside uptime and domain event monitoring, serving IT professionals, domain investors, and cybersecurity researchers.
- Company typePrivate
- Founded-
- HeadquartersDenver, United States
- Headcount1–10
- GTM typeB2C
- OfferingSoftware
What Who.Is does
Who.Is operates a self-serve web platform that aggregates public internet registration data into a single lookup interface. Its core products are WHOIS and RDAP lookups — protocols that return ownership, registration, and nameserver information for domain names, IP addresses, and autonomous systems — supplemented by DNS record lookups, website uptime monitoring, domain event tracking, and a broader website monitoring service. Technically, the platform is a thin front end over public WHOIS/RDAP registries and DNS; it does not own or operate a registry, and its differentiator is protocol coverage and convenience rather than proprietary data.
The company is privately held, headquartered in Denver, United States, and operates with a 1–10 employee footprint, consistent with a small utility-style operator. Its go-to-market is fully product-led: users arrive at who.is directly, typically via organic or type-in search, and perform lookups without a sales intermediary. Revenue mechanics are not publicly disclosed; the primary WHOIS/RDAP/DNS lookup surface appears to be free, while uptime monitoring, website monitoring, and domain events are positioned as potential subscription or premium offerings. There is no publicly disclosed pricing, no named enterprise customers, no management team information, and no funding history in the available data.
Customer segments are horizontal and include IT and domain professionals, domain investors, cybersecurity researchers, and general registrants needing due diligence or availability checks. Ownership, investor base, and financial scale are not evidenced, and the website's "© 2026" copyright is the only signal of ongoing operations.
Who.Is firmographics
Firmographics- Name
- Who.Is
- Website
- https://who.is
- Company type
- Private
- Operating status
- Operating
- Headcount range
- 1–10 employees
- Short description
- Who.Is is a self-serve domain intelligence platform that provides free WHOIS, RDAP, DNS, and IP lookups alongside uptime and domain event monitoring, serving IT professionals, domain investors, and cybersecurity researchers.
- Ownership category
- akta.pro rank
Who.Is industry classification
Industry- Product category
- Domain Name Intelligence Tools
- NAICS
- Directory and Mailing List Publishers (513140), Web Search Portals and All Other Information Services (51929)
- SIC
- Services-Computer Programming, Data Processing, Etc. (7370)
- akta.pro primary industry
- Directory Services & Identity Data Platforms (BPAMAEAG)
Keywords
Where Who.Is is headquartered
LocationHeadquarters
- HQ city
- Denver
- HQ country
- United States
- HQ region
- North America
Markets served
Who.Is business model
Business model- GTM type
- B2C
- Offering type
- Software
- Cost components
- Technology or R&D, Infrastructure, Personnel
Revenue model
- WHOIS/Domain Lookup Services: Free public WHOIS and domain lookup services. Additional services may include website monitoring subscriptions and premium features for professional users.
Go-to-market motion1 record
Distribution channels1 record
Marketing channels1 record
Who.Is product offering
Product offeringCore offering
Who.Is operates a self-serve web platform for looking up domain registration data, providing WHOIS and RDAP queries, DNS/nameserver records, and IP address information. It also offers website uptime and domain event monitoring services.
Product overview
Who.Is offers a unified platform of domain intelligence tools built around core lookup and monitoring capabilities. The product portfolio centers on WHOIS and RDAP (the modern successor) as the primary domain lookup services, complemented by DNS lookup, Uptime monitoring, Domain Events tracking, and Website Monitoring services. The platform enables users to instantly look up registration data, contact details, nameservers, DNS records, and more for any domain name or IP address.
Differentiator
Problem solved
Functional benefit
Products and services
- WHOIS A widely used internet protocol tool to query databases storing information about registered users of domain names, IP addresses, and autonomous systems, helping users find owner contact details, registration dates, and nameserver information.
- RDAP Registration Data Access Protocol, the modern successor to WHOIS, providing a standardized, secure, and structured way to access registration data with richer information and better privacy controls.
- DNS A DNS lookup tool that provides nameserver information and DNS records for any domain name.
- Uptime A website uptime monitoring service that tracks and reports on website availability.
- Domain Events A service for tracking and viewing domain-related events and lifecycle changes.
- Website Monitoring A comprehensive website monitoring service for tracking website performance and availability.
Companies that use Who.Is
Customer profileSegments2 records
Ideal customer profiles2 records
Who.Is technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
Who.Is partnerships and signals
Strategic signalExpansion highlights2 records
Who.Is competitors and assessment
Company assessmentMarket position
Competitive moat3 records
Key risks6 records
Key highlights5 records
Customer concentration
Who.Is social profiles
Digital presenceWho.Is financial estimates
Financial estimateRevenue estimate
Valuation estimate
Who.Is leadership team
Management profileNumber of profiles
Who.Is funding detail
Funding detailFunding overview
Funding rounds
Investors
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
Who.Is M&A and investment
M&A and investmentM&A
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about Who.Is
What does Who.Is do?
Who.Is operates a self-serve web platform for looking up domain registration data, providing WHOIS and RDAP queries, DNS/nameserver records, and IP address information. It also offers website uptime and domain event monitoring services.
When was Who.Is founded?
Who.Is was founded in -1. It employs 1 to 10 people.
Where is Who.Is based?
Who.Is is headquartered in Denver, United States, in the North America region.
How does Who.Is make money?
One revenue line is on record: WHOIS/Domain Lookup Services.
Does Who.Is have an API?
No public API is recorded for Who.Is.
What industry is Who.Is in?
Who.Is's product category is Domain Name Intelligence Tools. Its primary akta.pro industry code is BPAMAEAG, Directory Services & Identity Data Platforms. Its NAICS code is 513140 and its SIC code is 7370.