Smarter SMS Marketing

Clearstream is online text messaging software
for businesses and non-profits.

Sign up for free. No credit card. No setup fees. No contract.

Simple, yet powerful

Faster than any other SMS software. Real-time analytics that will blow your mind. Features you'll actually use. Discover why Clearstream is the obvious choice for thousands of small businesses, non-profits and brands in the U.S.

Clearstream SMS marketing platform on desktop and mobile devices
See All Features


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Send messages

Send or schedule a message to your subscribers. Outgoing messages are delivered at 250 texts/second.

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Grow your lists

Easily create keywords and website forms so customers/members can join your lists.

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Manage subscribers

See where new subscribers are coming from, capture data, and organize them into lists.

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Track performance

Track metrics such as link clicks, opt-ins, opt-outs, delivery rates and message replies. All in real-time.

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Smart inbox

Manage and respond to incoming messages from subscribers. Perfect for a text-enabled feedback, help, or support line.

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Robust API

Power your SMS application with our REST API, including custom webhooks.

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Mobile app

Send messages, reply to incoming texts and much more with our iOS app (Android coming soon).

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Legal compliance

FCC/TCPA compliance. CTIA/MMA compliance. Carrier compliance. We have you covered. Learn more.