Callr vs Spryng SMS API
Callr
callr.comSpryng SMS API
spryng.comSide by side
| Figure | Callr | Spryng SMS API |
|---|---|---|
| Price from | €599/mo | — |
| Free plan | — | — |
| Free trial | Yes | Yes |
| Open source | — | — |
| Web | Yes | Yes |
| iOS | Yes | — |
| Android | Yes | — |
| API | Yes | Yes |
| Plans published | 2 | 1 |
| Spec score · Transactional SMS Software | 9.1 (#3) | 8.3 (#23) |
| Company size | LinkedIn lists Callr as having 11–50 employees. | LinkedIn lists Spryng as a privately held telecommunications company with 11–50 employees. |
| Encryption | Callr says calls and messages use HTTPS, SIP TLS, and SRTP encryption. | The security page says data is encrypted in transit with SSL certificates and at rest with disk encryption. |
| Founded | 2011 | LinkedIn states that Spryng was founded in 2006. |
| Headquarters | Paris and New York | Amsterdam, Netherlands |
| Integrations | Callr lists native connectors for Salesforce, HubSpot, Google Analytics, and Google Ads, plus a REST API and webhooks. | Spryng states that its SMS API is connected to more than 250 systems. |
| Licence | The published API reference identifies the Callr API licence as proprietary. | The published PHP package is licensed under BSD-2-Clause, so the SDK is open source even though the hosted SMS service is proprietary. |
| REST API | The API uses REST conventions, form-encoded requests, JSON responses and standard HTTP status codes. | Customers can send SMS globally through a single REST API. |
| Support | Callr describes 24/7 support as part of its service and lists premium customer support for Enterprise. | Spryng advertises free 24/7 support by email, chat and phone in English, Dutch, German and French. |
| What it does | Callr provides programmable voice, SMS, call tracking, conversation intelligence and AI voice agents on its own carrier network. | Spryng provides business messaging services centered on SMS, with additional WhatsApp Business, RCS and voice offerings. |
Plans
In their own words
Spryng SMS API
Spryng SMS API has no write-up on Specifiction yet; its figures are above.