Disify
Validate and detect disposable and temporary email addresses
Clean up a signup form
Validate the email, phone, and address on a signup form, then screen for spam, fraud, and breach exposure.
Kickbox
Email verification API
Email Validation
Validate email addresses for deliverability and spam
mailboxlayer
Email address validation
Veriphone
Phone number validation & carrier lookup
Numverify
Phone number validation
Phone Validation
Validate phone numbers globally
US Street Address
Validate and append data for any US postal address
US Autocomplete
Enter address data quickly with real-time address suggestions
Lob.com
US Address Verification
VATlayer
VAT number validation
PurgoMalum
Content validator against profanity & obscenity
HaveIBeenPwned
Passwords which have previously been exposed in data breaches
EmailRep
Email address threat and risk prediction
IPLogs
Free VPN, proxy, Tor and datacenter IP detection. 13 sources, active probing