Try Bandwidth Build
Make your first call or text for free
Here's what you get when you sign up for a free trial of Bandwidth Build:
- A real U.S. 10DLC number, pre-provisioned for voice and messaging
- A ready-to-use voice application and SIP trunk
- 3000 preloaded credits to start building immediately
What you can do
- Voice API: Inbound and outbound calling, voice AI agents, IVR and call flows, call recording and transcription — all on the same infrastructure Bandwidth's enterprise customers use.
- SIP Trunking: Low-latency, reliable SIP Voice on our owned-and-operated network. Manage SIP trunks and routing configurations directly in the app, API, or CLI.
- Messaging: Send and receive 10DLC SMS between your Build number and your verified mobile number, with delivery and inbound callbacks. See Start a free trial of 10DLC SMS.
How it works
Fill out the form, get instant access, and make your first call or send your first text in minutes. No credit card required to start. When your 3000 credits run out, add more and pay as you go.
The details
This free trial covers Bandwidth's Voice API, SIP Voice, and SMS, and supports US and Canada traffic only. Calls and messages are limited to your verified mobile number. Once you purchase more credits, scale at your pace.
Voice calls have a concurrent limit of five and are capped at 30 minutes.
Messaging is SMS only; MMS isn't available yet. Trial messages carry a Bandwidth Free Trial Message - prefix and have to fit one 160-character segment. You can send 6 per minute and 200 per day. See the full messaging trial limits.
Prefer the CLI?
You can also register for a free trial without leaving your terminal using the Bandwidth CLI. Once it's installed, you can run:
band account register --phone +1XXXXXXXXXX --email you@example.com --first-name Jane --last-name Doe --accept-tos