Ostel.co began as a R&D effort sponsored by The Guardian Project. The question: Is a peer-to-peer secure voice and video call network possible to build with open Internet standards and Open Source software? After two years and tens of thousands of users later, the answer is a resounding YES!
The Guardian Project will continue to support the Open Secure Telephony Network. This open source project aims to make it as simple as possible for anyone to stand up their own secure VoIP backend with a custom domain. OSTN is a best practices guide to build your own application stack and a federated network of VoIP services. The more operators who host their own domain, the larger the global federated infrastructure becomes, freeing users from carrier control and ensuring call security. There are also ongoing automation projects to bring ease to hosting your own domain. For example, Docker repositories, Chef cookbooks and even a guide for the Raspberry Pi!
If you would like to get started with free calls over ostel.co, register for an account and use any of the supported client applications. If you would like support building your own secure VoIP backend, check out the docs, hang out in the #guardian project IRC channel and email firstname.lastname@example.org . We look forward to growing the network!