Sierra
Enterprise AI agent platform for customer service in chat and voice
Sierra is a chatbots & AI agents tool for Enterprise, offered as paid. Founded in United States in 2023.
About Sierra
Sierra is a conversational AI platform that lets large companies deploy branded AI agents for customer service and sales. It was founded in San Francisco in 2023 by Bret Taylor, former co-CEO of Salesforce and chair of OpenAI's board, and Clay Bavor, a longtime Google executive. Its core job is resolving requests end to end, such as changing an order or rebooking a flight, by taking actions in the company's systems rather than just answering FAQs.
Teams build agents in Agent Studio or let Ghostwriter create one from SOPs, transcripts or recordings. A single agent can run across chat, SMS, WhatsApp, email, voice and ChatGPT. Horizon plans multi-step outcomes over days or months, and Insights adds conversation analysis, monitors, experiments and observability. There are no public plans: Sierra sells enterprise contracts with outcome-based pricing, so you pay for resolved conversations or other agreed results.
Sierra fits large consumer brands with high contact volumes and complex back-end systems; customers shown on its site include SiriusXM, Rocket Mortgage, Gap, Wayfair, SoFi and Vanguard. It is not built for small businesses that want a self-serve chatbot. Intercom Fin is easier to switch on inside an existing help desk, Ada targets a similar enterprise buyer with a longer track record, and Yellow.ai is strong in Asian and multilingual markets.
Sierra is growing fast: it reported $100 million in annual recurring revenue in November 2025 and raised $950 million in 2026 at a reported valuation above $15 billion. Expect a sales-led process and a scoped pilot first.
Key features of Sierra
- Agent Studio for building and managing AI agents with or without engineers
- Ghostwriter builds an agent from SOPs, transcripts or call recordings
- One agent across chat, SMS, WhatsApp, email, voice and ChatGPT
- Agents take actions in back-end systems such as order and billing tools
- Horizon plans multi-step customer outcomes over days or months
- Insights with conversation explorer, monitors and multivariate experiments
- Observability into every decision and action an agent takes
- Outcome-based pricing tied to resolved conversations or agreed results
Pros and cons
Pros
- Built to complete tasks in your systems, not just answer questions
- Voice and digital channels run on the same agent
- Outcome-based pricing aligns cost with results
- Strong roster of large consumer brands in production
- Well funded, with fast product development
Cons
- No self-serve plans, public prices or free trial
- Aimed at large enterprises; overkill for small support teams
- Deployments need integration work with your back-end systems
- Outcome definitions must be negotiated carefully in the contract
- Young company with a shorter track record than older vendors
Sierra pricing
Sierra uses a paid model.
| Plan | Price | Includes |
|---|---|---|
| Enterprise | Custom | Outcome-based: you pay for results the agent delivers |
Source: sierra.ai · checked on Oct 20, 2026
How Sierra compares in Chatbots & AI agents
- Rank by votes
- #1 / 16
- Starting price
- —
- Free alternatives
- 0
0 votes from members
Category median is $40/mo
Free or open-source tools in Chatbots & AI agents
Sierra ranks #1 of 16 chatbots & ai agents tools by community votes and is not directly comparable on price.
Common use cases
- 1Telecom and media subscribers changing plans or fixing service issues
- 2Retail customers tracking, changing or returning orders
- 3Financial services customers handling account and loan questions
- 4Voice agents taking over first-line calls in a contact center
- 5Proactive outreach for renewals and multi-step customer journeys
Best for
Large consumer brands with high contact volumes that want AI agents to resolve requests end to end across chat and voice.
Not ideal for
Small and mid-sized support teams that want a self-serve chatbot with public pricing (Intercom Fin, Tidio Lyro, Chatbase).
Integrations
- Salesforce Service Cloud
- Zendesk
- Shopify
- Five9
- ChatGPT
Our take
Sierra is one of the leading choices for enterprise customer service automation, especially when voice and back-end actions matter. Run a tightly scoped pilot and define what counts as a billable outcome before signing; smaller teams should start with a help desk-native AI agent instead.
FAQ
- What is Sierra?
- Sierra is a Chatbots & AI agents tool: Enterprise AI agent platform for customer service in chat and voice.
- How much does Sierra cost?
- Sierra uses a Paid model; see the vendor's pricing page for current plans.
- What does Sierra integrate with?
- Sierra integrates with Salesforce Service Cloud, Zendesk, Shopify, Five9, WhatsApp, ChatGPT and more.
- Which platforms does Sierra support?
- Sierra is available on web.
- Who is Sierra for?
- Large consumer brands with high contact volumes that want AI agents to resolve requests end to end across chat and voice.
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