Callr is a cloud-based communications platform that provides programmable voice, SMS, and phone number management through a developer-friendly API. It allows businesses and developers to integrate telephony features—such as inbound and outbound calls, SMS messaging, call tracking, and virtual phone numbers—directly into their own applications or workflows. The platform supports a range of use cases including call analytics, marketing attribution via call tracking, customer engagement, and automated messaging. Callr offers local and international phone numbers across multiple countries, enabling global reach. Its API-first approach makes it suitable for technical teams looking to build custom communication solutions, while its dashboard provides visibility into call and message activity. The platform is used across industries such as marketing, customer support, and field services, where tracking and managing voice and SMS interactions at scale is important.
Target audience and deployment
- Startup
- SMB
- Mid-market
- Enterprise
- Cloud
- API
Key features
Use cases
- Track marketing campaign calls
- Embed voice calling into applications
- Send and receive SMS messages programmatically
- Manage virtual phone numbers globally
- Analyze call data and activity
- Automate customer engagement workflows
Best for
- Developers who need to embed voice and SMS capabilities into custom applications via API
- Marketing teams who need to track and attribute inbound calls to specific campaigns
- SMBs who need to manage virtual phone numbers and communications at scale
- Enterprise teams who need programmable telephony integrated into existing business workflows