Cisco: Provides robust VoIP PBX solutions for businesses of all sizes.
Yeastar: Known for its S-Series VoIP PBX systems, Yeastar offers unified communications solution.
Sangoma: Offers Asterisk-based IP PBX systems, which are highly customizable.
Zoho: Provides a PBX system that integrates with Zoho's suite of business applications.
HoduSoft: Offers HoduPBX, a customizable IP PBX solution with features like WebRTC audio-video chat and SMS integrations.
Signalmash: Offers IP PBX systems with various customization options
Matrix Eternity GENX: This IP PBX system is designed for small and medium enterprises. It supports up to 999 IP users and integrates with VoIP, GSM, and PSTN networks.