Agent harnesses
Sierra
Conversational AI agent platform for customer experience, across chat, SMS, email, voice, and ChatGPT
Commercial
What it is
Our note
Sierra's Context Engine is the persistence layer: Memory ties every interaction to one customer across channels with permissioned data sovereignty and export to the customer's warehouse, while Signals react to real-time first- and third-party events and Horizon plans multi-day journeys so context compounds across sessions.
At a glance
- Business model
- Commercial
- Self-hosting
- No, hosted only
- Access
- web app
Links and sources
- Official sitesierra.ai
- Sourcesierra.ai/product/context-engine
Facts verified nov 10, 2026; added nov 10, 2026. Vendor facts come from the vendor’s own pages; benchmark claims are self-reported unless we say otherwise.