Large consumer brands running customer service at scale; you pay per completed outcome, but only through enterprise sales.
Kenning's take
What it does
Sierra lets companies build AI agents that handle customer conversations across chat, SMS, WhatsApp, email, voice and ChatGPT. Its Ghostwriter tool builds an agent from uploaded procedures, transcripts or a plain-English goal, and other tools monitor, test and explain agent behaviour. Sierra charges on outcomes, so companies pay for completed work rather than per seat.
- Ghostwriter builds agents from SOPs and recordings
- One agent across chat, SMS, WhatsApp, email, voice and ChatGPT
- Insights, monitors and A/B experiments
- Long-horizon planning and customer memory
- Outcome-based pricing
Who it suits. Large consumer brands that want AI agents for customer service and sales.
Key facts
- Category
- Business tools
- Made by
- Sierra
- How to get it
- enterprise sales only, through sierra.ai
- Works on
- Web, Voice, Messaging channels
- In the UK
- Yes
FAQ
Who founded Sierra?
Bret Taylor and Clay Bavor, who met while working at Google.
How does Sierra charge?
With outcome-based pricing, through its sales team; there are no public prices.
Which channels does Sierra support?
Chat, SMS, WhatsApp, email, voice and ChatGPT.
Facts from the maker's own pages and the sources listed. Checked 2026-10-11.
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