Cloudmersive Validate API alternatives

Validate international phone numbers. A free phone API by Cloudmersive. If it doesn't fit your project, here are the 7 best free Phone APIs to use instead in 2026, out of 7 in the directory.

For reference, Cloudmersive Validate API: Callable from the browser (CORS) · HTTPS.

1. 1

   Phone Specification API

   Online · 795 ms

   Rest Api for Phone specifications.

   • No API key needed
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
2. 2

   Veriphone API

   Online · 54 ms

   Phone number validation & carrier lookup.

   • Fast: 54 ms response
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
3. 3

   Phone Validation API

   Online · 2411 ms

   Validate any phone number in real time and get its carrier, line type, and location.

   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
4. 4

   Numlookup API

   Online · 495 ms

   Phone number validation and carrier lookup API with global coverage.

   • HTTPS

   apiKeyHTTPSCORS ?
5. 5

   Numverify API

   Online · 894 ms

   Numverify API is a powerful JSON API providing international and national phone number validation, carrier, location, and line type lookup for developers.

   • HTTPS

   apiKeyHTTPSCORS ?
6. 6

   PlaceCall API

   Online · 1123 ms

   AI agent places phone calls to US businesses and returns the outcome, transcript and recording.

   • HTTPS

   apiKeyHTTPSNo CORS
7. 7

   VeriRoute Intel API

   Online · 1564 ms

   CNAM caller ID, carrier/LRN lookup and spam scoring for North American phone numbers.

   • HTTPS

   apiKeyHTTPSCORS ?

Cloudmersive Validate API vs alternatives

Cloudmersive Validate API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
Cloudmersive Validate	Required	Yes	Yes	Up	847 ms	Not rated
Phone Specification	No	Yes	Yes	Up	795 ms	Not rated
Veriphone	Required	Yes	Yes	Up	54 ms	Not rated
Phone Validation	Required	Yes	Yes	Up	2411 ms	Not rated
Numlookup	Required	Yes	Unknown	Up	495 ms	Not rated
Numverify	Required	Yes	Unknown	Up	894 ms	Not rated
PlaceCall	Required	Yes	No	Up	1123 ms	Not rated
VeriRoute Intel	Required	Yes	Unknown	Up	1564 ms	Not rated

See also: best Phone APIs · all Phone APIs