Enterprise conversational AI agents
4.6 Bottom line: Sierra is a top-tier customer support tool, best known for agents that act on customer accounts, not just answer questions.
Sierra builds conversational AI agents that handle support and take real actions for customers, like upgrading subscriptions or managing orders. Founded by Bret Taylor and Clay Bavor, it runs both text and voice agents through its Agent OS and connects to the systems behind your business. Pricing is outcome-based and quoted per company.
| Tool | Rating | Free | From | Best known for |
|---|---|---|---|---|
 Sierra (this tool) | 4.6 | No | — | Agents that act on customer accounts, not just answer questions |
 Cognigy | 4.5 | No | — | Voice AI agents built for contact center telephony |
 Decagon | 4.5 | No | — | Agent Operating Procedures that encode workflows and rules |
 Help Scout | 4.5 | Yes | $25/mo | AI Answers agent that resolves questions autonomously |
Sierra is an excellent customer support tool, best known for agents that act on customer accounts, not just answer questions.
What makes it different: Sierra stands out for agents that act on customer accounts, not just answer questions.
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