Atlas / Agent platforms and enterprise agents / Sierra
Sierra
AI Market Atlas · by Pro Pluribus
Sierra
Customer-experience agents; valued at $15.8B.
What it offers
Main offerings
- Sierra
- Branded customer-service agents.
- Personal Agent Protocol
- Open protocol with Meta (6 Oct) for how consumers' personal agents deal with businesses.
Recent news
- Sierra and Meta announce the open Personal Agent ProtocolAn attempt to set the standard for how consumer agents deal with businesses; 35 more design partners joined Oct 9.Unite.AI ↗
- Sierra raises $950M at about $15.8B valuationTiger Global and GV lead as customer-service agents become the most funded agent categoryTechCrunch ↗
- Bret Taylor's Sierra raises nearly $1BValuation up from $10B in fall 2025, with ARR about $150MCNBC ↗
Compiled from public sources by Pro Pluribus; updated 16 Oct 2026. General information, not advice. Company names and logos belong to their owners and are used to identify them, without affiliation or endorsement. Terms