Phone numbers, SMS, fax and voicemail for everyone — plus AI voice agents that answer your calls. One platform, one bill, no jargon.
Voice, SMS, fax, and voicemail — unified in one platform.
Crystal-clear HD calling on your own number, with a softphone extension for every device you use.
Full messaging UI with conversations, contacts, and message history. Text from any device.
Send and receive faxes digitally, with email-to-fax and a web interface.
Voicemail with transcription and AI summaries. Listen online or get messages delivered to your email.
One phone plan for everyone, and AI voice agents if you want them. No hidden fees.
Everything you need to talk, text and fax
Capstone agents that answer your calls
Voice agents built on Capstone pick up your calls, answer real questions, take messages and hand the call to you when it matters — on the same number you already own. Add them to your plan for $49/month.
See voice agentsGet your phone number, set up your extension, and start communicating in minutes.
Get started now