Sierra contact center AI profile

Platform for building and running customer-facing AI agents across chat, voice, email and messaging, sold on outcome-based pricing.

Research note: This neutral profile summarizes first-party material published by Sierra, last checked Oct 20, 2026. Capabilities can differ by plan, channel and integration, so verify the exact capability you need.

Sierra at a glance

Focus: Autonomous, brand-specific AI agents that resolve customer requests end to end, with tools to build, test and analyze them.
Good fit for: Large consumer brands that want a standalone AI agent across many channels and prefer paying per outcome rather than per seat.
Capabilities: AI agents
Channels: Chat, SMS, WhatsApp, email, voice, ChatGPT
Deployment: standalone AI agents
Recent changes: Ghostwriter and Explorer (March 2026); SoftBank exclusive Japan partnership (July 2026); Horizon (July 2026); Voice Personas (August 2026); AIUC-1 certification (September 2026).
Website: sierra.ai

This profile summarizes Sierra's first-party homepage and blog, plus a partner's press release, as checked on 2026-10-20. The Contact Center AI Index has not tested the product, and each claim is attributed to its source.

What is Sierra?

Sierra is a platform for customer-facing AI agents. Its homepage headline is "Better outcomes. Built on Sierra," and it lists Ghostwriter, Agent Studio, Horizon, Context Engine, Insights, Explorer and Channels as products (homepage). Sierra says it uses outcome-based pricing so customers "only pay for the value Sierra delivers" (homepage). In February 2026 it reported "over $150M in ARR" (company-reported) (Year two in review).

Sources: Sierra homepage · Year two in review

Which AI capabilities does Sierra document?

Agent building. Sierra describes Ghostwriter as an agent that builds production-ready agents for voice, chat and email from SOPs, call transcripts or a plain-language description of the goal (Agents as a Service).
Conversation analysis. Explorer analyzes customer conversations to surface trends and improvement opportunities (Agents as a Service).
Long-running agents. Horizon is for agents that pursue goals over days, weeks or months, such as originating a loan or securing prior authorization (Horizon).

Sierra does not market QA, coaching or real-time assist for human agents on the pages checked. It is an AI agent platform rather than a tool for managing a human agent workforce.

Sources: Agents as a Service · Horizon · Sierra homepage

How does it connect to existing contact center systems?

Sierra says one agent can be deployed "across chat, SMS, WhatsApp, email, voice, and ChatGPT," and describes memory "that connects conversations, systems, and touchpoints" (homepage). The homepage does not name CCaaS, telephony or CRM integration partners in text; a graphic shows data platform logos including Google Cloud, Databricks, Snowflake and AWS (homepage).

Sources: Sierra homepage

What security and compliance evidence is public?

Sierra's homepage lists SOC 2, ISO 27001, ISO 42001, HIPAA, GDPR, EU AI Act, STAR Level One, FedRAMP and PCI DSS (homepage). In September 2026 Sierra said it achieved AIUC-1 certification, which it describes as a standard that tests how AI agents behave, including under manipulation attempts (AIUC-1 post).

Sources: Sierra homepage · AIUC-1 post

What changed in 2025-2026?

March 25, 2026: Ghostwriter and Explorer announced, with the platform rebuilt as headless infrastructure (Agents as a Service).
July 14, 2026: SoftBank Corp. became Sierra's exclusive partner in Japan (SoftBank).
July 16, 2026: Horizon announced (Horizon).
August to October 2026: Sierra's blog lists Voice Personas (August 7), AIUC-1 certification (September 17) and a Personal Agent Protocol (October 6) (blog index).

Sources: Agents as a Service · SoftBank · Horizon · Blog index

What should buyers verify?

Define in the contract exactly what counts as a billable outcome, since pricing is outcome-based and no rates are published on the homepage. Ask which telephony and CRM systems Sierra connects to natively. Plan separately for QA and coaching of human agents, which Sierra's pages do not cover.