Sierra

Sierra is a platform for building customer-facing AI agents that handle service and sales across chat, SMS, WhatsApp, email, voice and ChatGPT.

Sierra is a conversational AI platform that businesses use to build AI agents for customer service and revenue growth. Its agent-building agent, Ghostwriter, creates a multilingual agent with guardrails from uploaded procedures, transcripts, whiteboard photos and audio recordings, or from a goal described in plain English. One agent can be deployed across chat, SMS, WhatsApp, email, voice and ChatGPT, and it keeps customer context across conversations and systems. Teams improve agents with Explorer, which runs deep research over conversations, along with monitors, multivariate experiments and observability of every tool call and knowledge lookup. Sierra was founded by Bret Taylor and Clay Bavor and uses outcome-based pricing, so customers pay for completed results.

Sierra at a glance

Best for: Support, Founder, Director
Runs on: Web
Pricing: Outcome-based pricing; contact sales
Released: February 2024
Category: AI agent tool
Website: sierra.ai

Key features

Ghostwriter builds agents from SOPs, transcripts and recordings
One agent across chat, SMS, WhatsApp, email, voice and ChatGPT
Explorer for deep research over customer conversations
Monitors that flag conversations needing attention
Multivariate experiments on conversation design
Observability of tool calls, lookups and latency
Long-horizon plans and customer memory

Use it for

Automate customer service across phone and chat
Handle subscription changes and retention offers
Find out why customers contact support by analysing conversations

Companions

Tools that articles about Sierra recommend using with it, each with its job.

ChatGPT — Built to work with ChatGPT.
Canva — Create and edit designs and slides inside the chat.
Firecrawl — Provides direct web data access for AI agents with open source flexibility.
ElevenLabs — Text-to-speech, voice cloning and sound from the chat.
Runway — Leading video model plus editing, upscaling and an agentic collaborator
Asana — Turns briefs into tracked projects and tasks.

Alternatives to Sierra

Parloa — Enterprise customer service agents built without specialists and scaled securely.
Ada — Enterprise AI agent that can act in business systems, not just reply
Agentforce — AI agents that act on Salesforce data with built-in guardrails
Decagon — Agent behavior written in plain language, not config code
Voiceflow — Visual builder for support agents across chat, voice and WhatsApp
Keiki — Deploy one AI agent across multiple messaging channels with built-in tools and memory.
Giga — Deploys in weeks to handle customer requests, follow-ups, and sales opportunities.
FastGPT — It uses hybrid retrieval and auto-cleansed data to prevent hallucinations.
Cumora — AI agents have memory, status, and initiate their own conversations.
Owlbot — Provides automated, sourced responses using your specific business data.
Fin — Customer agent with a 76% average resolution rate
AI Agent — Automates repetitive tasks with AI agents connected to your tools.

All Sierra alternatives