The "gold standard" for U.S. users, providing a permanent secondary number that integrates with your existing Google account.
Offers a real phone number for free texting and calling from mobile apps or a web browser. no credit card
If you are looking to create the or a visual mockup: TextMe - Unlimited free texting and calling to any phone The "gold standard" for U
Offers a free start with fast registration and no card required for their SMS marketing software. The "gold standard" for U.S. users
Allows you to test business messaging with free credit and no credit card needed. Text Content Generators
Many services allow you to send real SMS or make calls over Wi-Fi without ever asking for payment information.