192 (UK)
Search by person, business, address. Limited free info, premium data upsell.
411 (US)
Search by person, phone number, address, and business. Limited free info, premium data upsell.
Ancestry
Premium data, free trial with credit card.
Apollo.io
Free B2B Phone Number & Email Finder. 1200 credits per user/year for free plan.
BeenVerified
www.backgroundchecks.com
Black Book Online
Free. Nationwide directory of public record lookups.
Canada411
Search by person, phone number, and business. Free.
Classmates
High-school focused people search. Free acounts allow creating a profile and viewing other members. Premium account required to contact other members.
ContactOut
Unlock the world's most accurate contact data. Find emails & phone for 300M professionals.
Clustermaps
Find people and address information associated with them
CrunchBase
Business information database, with a focus on investment, acquisition, and executive data. Ancillary focus on market research and connecting founders and investors.
FaceCheck.ID
Search the internet by face.
Family Search
Popular genealogy site. Free, but registration required. Funded by The Church Of Jesus Christ of Latter-day Saints.
FamilyTreeNow
Research family and geneology, no registration required, can search addresses, phone numbers, and email addresses as well as associations.
Federal Bureau of Prisons - Inmate Locator (US)
Search federal inmates incarcerated from 1982 to the present.
Fold3 (US Military Records)
Search military records. Search filters limited with free access. Premium access requires subscription.
Genealogy Bank
Premium data, free trial with credit card.
Genealogy Links
Genealogy directory with over 50K links.
Homemetry
Reverse address search and allows searching for properties for sale/rent.
InfoTracer
Search for people. (Searches are paid)
Judyrecords
Free. Nationwide search of 400 million+ United States court cases.
Kompass
Business directory and search.
Mugshots
mugshots.com
OpenSanctions
Information on sanctions and public office holders.
PeekYou
PeekYou offers the ability to search for people with checks done against more sites. Can check for arrest records as well.
Reunion
People search. Limited free info, premium data upsell.
Socialcatfish
Superextensive people search which works worldwide. Searches are done from 200 Billion records.
SearchBug
People search. Limited free info, premium data upsell.
Spokeo
People search. Limited free info, premium data upsell.
The National Archives (UK)
Search UK national archives.
UniCourt
Limited free searches, premium data upsell. Nationwide search of 100 million+ United States court cases.
UK Phone Book
Search people in a similar way as 192.com
VineLink
Inmate search and notification service for victims of crime, linked to multiple correctional facilities' booking systems in the U.S.
Voter Records
Free political research tool to study more than 100 Million US voter records.
White Pages (US)
People search. Limited free info, premium data upsell.
ZabaSearch
www.zabasearch.com