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Callab AI
Spring 2026
Active
AI voice agents for on-prem telephony stack.
7 people View on YC
Callab AI at a glance
- Y Combinator batch
- Spring 2026
- Status
- Active
- Industry
- B2B
- Team size
- 7 people
- Location
- Not recorded
- Website
- Not recorded
Every field above comes from the Y Combinator company record. Nothing is estimated.
About Callab AI
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.