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AI voice agents for on-prem telephony stack.
58% of the $400B call center industry runs on on-prem phone systems, and until now bringing AI voice automation to them meant ripping out their entire infrastructure first. That's the largest unserved segment in the market. Callab AI connects directly to legacy PBX systems like Avaya, Cisco UCM, and Mitel, and automates up to 70% of call volume with zero migration needed. We plug into these environments without requiring a rip-and-replace. We serve clients across three continents, including brands like Dunkin Donuts.
Callab AI provides AI voice agents designed for on-prem telephony stacks, able to operate within existing PBX/SBC and contact center infrastructure without migration. The solution emphasizes live human supervision, CRM integration, and visibility into every call to replace legacy IVR menus across support, sales, and scheduling use cases.
The product enables building and configuring AI voice agents that work with your current phone system without requiring infrastructure changes. Key capabilities include semantic knowledge-base indexing for on-call references, post-call transcription and sentiment analysis, context-aware call transfer between AI agents and live agents, automatic CRM updates from conversations, batch calling to initiate many AI-powered calls, and real-time monitoring with supervisor takeover when needed.
Who it’s for: Organizations with on-prem telephony stacks (PBX/SBC) and centralized contact centers seeking AI-driven voice automation that can operate without migrating infrastructure.
Mentions Y Combinator backing; extensive feature repeats and live supervision indicate traction and investor interest.
7+ years building AI solutions across government and enterprise, with work experience spanning France, Tunisia, and the UAE. At Callab AI, he leads go-to-market and strategy - scaling the company through enterprise and contact center partnerships. Previously deployed AI systems across government entities.
10+ years building scalable enterprise systems across IT consulting, full-stack development, and technical leadership for financial institutions. At Callab.ai, he architects the core voice AI infrastructure - including deep integrations with legacy telephony stacks (CUCM, SIP trunks, PBX systems). Previously built and shipped platforms serving 200,000+ users across government entities in Tunisia.
AI voice agents for enterprise contact centers running on legacy phone infrastructure
Callab AI deploys AI voice agents to on-premises PBX phone systems via SIP trunk integration, enabling legacy contact centers to automate call routing, appointment scheduling, and inquiry handling without migrating to cloud telephony. Integration takes approximately one week.
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How Callab AI’s homepage introduced itself over the years — each line is the page title the web actually saw, linked to that moment’s archived capture.
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