TextKit API alternatives

Send and receive SMS, verify phones and buy US and Canada numbers; free sandbox. If it doesn't fit your project, here are the 9 best free Phone APIs to use instead in 2026, out of 9 in the directory.

For reference, TextKit API: 100% uptime (30 days) · HTTPS.

1. 1

   Cloudmersive Validate API

   Online · 1021 ms

   Validate international phone numbers. A free phone API by Cloudmersive.

   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
2. 2

   Phone Specification API

   Online · 1405 ms

   Rest Api for Phone specifications.

   • No API key needed
   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   No authHTTPSCORS
3. 3

   Veriphone API

   Online · 690 ms

   Phone number validation & carrier lookup.

   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
4. 4

   Phone Validation API

   Online · 2855 ms

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

   • 100% uptime (30 days)
   • Callable from the browser (CORS)
   • HTTPS

   apiKeyHTTPSCORS
5. 5

   Numlookup API

   Online · 886 ms

   Phone number validation and carrier lookup API with global coverage.

   • 100% uptime (30 days)
   • HTTPS

   apiKeyHTTPSCORS ?
6. 6

   PlaceCall API

   Online · 959 ms

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

   • 100% uptime (30 days)
   • HTTPS

   apiKeyHTTPSNo CORS
7. 7

   Fax for Agents API

   Online · 2184 ms

   Fax API, hosted MCP server and SDKs so AI agents send and receive faxes, free sandbox.

   • HTTPS

   apiKeyHTTPSNo CORS
8. 8

   Numverify API

   Online · 1242 ms

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

   • 100% uptime (30 days)
   • HTTPS

   apiKeyHTTPSCORS ?
9. 9

   VeriRoute Intel API

   Online · 1390 ms

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

   • 100% uptime (30 days)
   • HTTPS

   apiKeyHTTPSCORS ?

TextKit API vs alternatives

TextKit API compared with its alternatives

API	API key	HTTPS	CORS	Uptime	Response	Rating
TextKit	Required	Yes	No	100%	1598 ms	Not rated
Cloudmersive Validate	Required	Yes	Yes	100%	1021 ms	Not rated
Phone Specification	No	Yes	Yes	100%	1405 ms	Not rated
Veriphone	Required	Yes	Yes	100%	690 ms	Not rated
Phone Validation	Required	Yes	Yes	100%	2855 ms	Not rated
Numlookup	Required	Yes	Unknown	100%	886 ms	Not rated
PlaceCall	Required	Yes	No	100%	959 ms	Not rated
Fax for Agents	Required	Yes	No	Up	2184 ms	Not rated
Numverify	Required	Yes	Unknown	100%	1242 ms	Not rated

See also: best Phone APIs · all Phone APIs