Kamailio vs PostGrid
KamailioCommunication APIs
Free / Open SourcePublished price
PostGridCommunication APIs
Usage-basedPublished price
Kamailio Communication APIs Powering Open Real Time Communications | PostGrid Communication APIs Address verification and direct mail API. | |
|---|---|---|
| Overview | ||
| Category | Communication APIs | Communication APIs |
| What it is | Open-source SIP server providing VoIP, WebRTC, and real-time communication services with high scalability and flexible routing. | PostGrid automates direct mail with address verification, template customization, and mail tracking APIs, integrating with CRMs and business platforms for automated workflows. |
| Pricing | ||
| Published price | Free / Open Source Kamailio is an open-source SIP server released under GPLv2 or later. The software can be downloaded and operated without a subscription; commercial implementation, appliances, hos… | Usage-based Usage/per-piece pricing (print + postage + address verification bundled per mailing). Starter tier free to test, limited to 500 mailings/mo at per-piece rates; subscription and en… |
| Pricing model | Free | Usage-based |
| Free options | Free plan · No free trial | No free plan · No free trial |
| Deal on Cubbie | None right now | None right now |
| Company | ||
| Founded | 2005 | 2018 |
| Team size | 1-10 employees | 51-200 employees |
| Headquarters | Community Project | Toronto, Canada |