WhoisXML API
- whoisxmlapi.com
English
Other languages - Data-driven tools
Primary features: Search tools, Monitoring tools
Alexa
- alexa.com
English
Other languages - Data-driven tools
Primary features: SEO tools
Benmi
- benmi.com
English
Other languages: ZHS, ZHT
Language selector: Top right corner - Data-driven tools
Primary feature: Aftermarket aggregator
Dofo
- dofo.com
English
Other languages - Data-driven tools
Primary feature: Aftermarket aggregator
Domain Name Stat
- domainnamestat.com
English
Other languages - Data-driven tools
Statistics
Domain Name Stats
- domainnamestats.com
English
Other languages - Data-driven tools
Statistics covering all TLDs.
Also namestat.org which dedicated to new TLD statistics.
DomainEye
- domaineye.com
English
Other languages - Data-driven tools
Primary features: Reverse IP, NS and MX
DomainIQ
- domainiq.com
English
Other languages - Data-driven tools
Primary features: Search by domain, search by IP
DomainTools
- domaintools.com
English
Other languages - Data-driven tools
Primary features: Monitoring tools
A Whois/IP lookup tool is available at: whois.domaintools.com
DotDB
- dotdb.com
English
Other languages
NameBio
- nambio.com
English
Other languages - Data-driven tools
Primary feature: Domain name sales history
SimilarWeb
- similarweb.com
English
Other languages - Data-driven tools
Primary feature: Check and analyze any website
UDRP.Tools
- udrp.tools
English
Other languages - Data-driven tools
Primary feature: Search domain disputes