Certified SIP Trunk Providers Poland

FreePhone

FreePhone, founded in 2006, is a Polish VoIP provider, delivers across the country, innovative telephony service for residential and business customers. We currently offer our services to more than 50 resellers and 10,000+ end users. Our products include VoIP Trunking, DID Porting, Managed billing platform, Hosted PBX, and the full range of S-Series IP-PBX systems. We use the Yeastar systems for the easy to use web interface and rock-solid performance along with the extensive business features.

Telxi Limited

Telxi is a next-generation telecommunications provider offering enterprise-grade VoIP, SIP trunking, and cloud-based communication services. Our scalable, pay‑as‑you‑go platform includes local and international voice termination, DIDs, messaging, fax, and emergency calling—delivered over a secure, fraud-protected infrastructure.
Built for CPaaS platforms, contact centers, and seamlessly compatible with top PBX systems, Telxi ensures easy integration, instant SIP trunk provisioning, unlimited channels, and global coverage. Features include TLS/SRTP encryption, real-time analytics, call recording, and full KYC/AML compliance.
With carrier-grade reliability, flexible API integrations, and 24/7 expert support, Telxi empowers businesses to connect, scale, and operate cost-effectively—anywhere in the world.

z4o

z4o Sp. z o.o., founded in 2021, is a dynamically growing technology company that offers modern solutions for business clients in Poland and Europe. Our offer includes innovative services in the installation and integration of communication systems, as well as the supply and configuration of telecommunications equipment. We collaborate with leading manufacturers such as Yeastar to deliver top-quality equipment and solutions. We serve clients from various sectors, offering comprehensive technical support, service, and the ability to customize our solutions to meet individual business needs.