Sierra

Name: Sierra
Author: AgentRadar

Verified

Conversational AI agent for elevated customer experience

Customer Support Agents Contact

6.5 /10

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Released

2023

Country

United States

API

Available

Self-Host

Funding

Series B

Last Updated

2025-06

About Sierra

Sierra is an enterprise conversational AI platform founded by Bret Taylor. It lets companies build and deploy AI agents that handle customer conversations across channels — resolving issues, taking actions in connected systems, and escalating to humans when needed. Sierra emphasizes safety, brand voice, and measurable resolution rates, with guardrails to prevent off-brand or harmful responses. It targets large enterprises in telecom, finance, retail, and travel.

Verdict

A serious enterprise conversational AI platform — Sierra brings brand-safe, action-taking agents to large customer-experience operations, with the founding pedigree to back it.

Features

Autonomous resolution

Brand voice & guardrails

System integrations

Human handoff

Analytics & monitoring

Multi-channel

Detailed Ratings

Ease of Use

6.3

Value for Money

6.7

Features

6.6

Support

6.0

Performance

6.7

Overall Rating

6.5 /10

Pros & Cons

Pros

Enterprise-grade safety
Strong brand control
Action-taking agents
Founded by industry veterans

Cons

Enterprise pricing only
Requires implementation
No self-serve for SMBs

Use Cases

Enterprise customer serviceOmnichannel supportSelf-service resolutionCustomer experience

Who Is It For?

Large enterprises that need a safe, on-brand conversational AI agent to autonomously resolve customer issues at scale

#customer-support#conversational-ai#enterprise#agent-platform

Pricing Plans

Enterprise

Contact

Custom agent deployment
Brand guardrails
System integrations
Dedicated support
SLA

Frequently Asked Questions

What is Sierra?

Sierra is an enterprise conversational AI platform for building customer-facing agents that resolve issues autonomously while staying on-brand, with guardrails and human handoff.

Is Sierra for small businesses?

No — Sierra targets large enterprises. It requires custom implementation and enterprise pricing, making it best suited to mid-market and enterprise customer experience teams.