PortSIP PBX
8.0#20 in business phone systemsFree planFree planAndroidiOSWebAPI
VisitNo prices published.
PortSIP PBX suits service providers and MVNOs that need a broad communications, contact-center, and developer platform. It also fits organizations choosing self-hosted, cloud, or Docker deployment with Microsoft 365 integration.
You want what its maker publishes above — check its page for the details.