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 is a Y Combinator company in the Spring 2026 batch. Its directory entry describes it as: Human-centered AI for contact centers. The founders listed are Haithem Kchaou (Founder/CEO), Chehir Dhaouadi (Founder/CTO) (Y Combinator directory entry, March 13, 2026).
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New accelerator entry · 2026-03-13 · the record
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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.
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Example from a real report (our sample on Target): “The Q2 2026 earnings report, published August 19, 2026, showed adjusted EPS of $2.46 against an expected $2.33” Source: CNBC
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