telesign Telesign by: telesign 185,632 total downloads last updated 7/26/2022 Latest version: 2.2.5 telesign sms voice mobile authentication identity messaging The Telesign C# SDK lets you easily integrate with our REST API. TelesignEnterprise by: telesign 13,509 total downloads last updated 7/27/2022 Latest version: 2.2.3 telesign sms voice mobile authentication identity messaging The TeleSign C# SDK lets you easily integrate with our REST API.