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AI agents0 reviewsprofile updated Oct 8, 2026

Sierra

Platform for building and running customer-facing AI agents across chat, voice, email and messaging. By Sierra.

Too few public reviews to rate. We found 0 reviews about the AI itself; a share needs 10 that mention the point. The profile below sets out what Sierra publishes.

What it does

Sierra sells a platform for building customer-facing AI agents and deploying one agent across chat, SMS, WhatsApp, email, voice and ChatGPT1. Agent Studio lets teams build and manage agents without code, using journeys (workflows), tools and knowledge such as help center content and policies2. Ghostwriter builds agents from uploaded procedures, transcripts and recordings, or from a goal written in plain English1.

Channels
Chat, SMS, WhatsApp, Apple Business Chat, Email, Voice, ChatGPT
Works with
Over 40 pre-built integrations with knowledge bases, systems of record and contact centers, plus custom integrations built in Agent Studio2. No contact center or CRM vendor is named on its product pages3.

Handing a conversation to a person

As Sierra documents it. Reviewers' experience of handoffs is in the shares above.

Agent actions can route conversations to the care team with full context2. Live Assist lets care representatives act on information from the conversation3. Which platforms receive the handoff, and in what form, is not published.

Controls

Safety and review features, as Sierra documents them.

  • Filters and monitors for topics and keywords that are off-limits under company policy4
  • Supervisory layers around the language models to reduce hallucinations and prevent abuse4
  • AI evaluations that simulate conversations against defined outcomes, and regression test suites run before releasing new agent versions2
  • Voice simulations that test transcription, background noise and speaker variation before launch2
  • Agent Traces that show every decision, tool call and response2
  • Insights: conversation analysis, monitors that flag conversations, experiments and observability1
  • Personal information shared with the agent is encrypted and masked automatically4
  • Certifications listed: SOC 2, HIPAA, GDPR, PCI DSS Level 1, FedRAMP High, CCPA, CSA STAR, ISO 27001 and ISO 420014

Setup

Sierra says Ghostwriter can generate an agent from existing procedures, transcripts and recordings1, and that journeys can be generated with AI from existing operating procedures2. Sierra does not publish a standard setup time; its customer page lists Singtel with a time to live of under 10 weeks5.

What Sierra claims

The vendor's own figures. Shown as claims; never used in a result.

  • Sierra says Airtable has an 80% resolution rate5
  • Sierra says Rocket Mortgage saw 4x higher conversion rates5
  • Sierra says SoFi improved NPS by 33 points5
  • Sierra says Sun & Ski Sports saw a 3x increase in conversion rate5
  • Sierra says its voice personas are tuned across 60+ locales3

Not found in public sources

We looked for these and could not find them.

  • Public prices or a rate card
  • Named help desk or contact center platforms for handoff
  • What a human agent receives at handoff
  • Approval steps for agent changes

Sources

  1. [1]Sierra homepageSierra · accessed Oct 8, 2026
  2. [2]Agent StudioSierra · accessed Oct 8, 2026
  3. [3]ChannelsSierra · accessed Oct 8, 2026
  4. [4]Trust and reliabilitySierra · accessed Oct 8, 2026
  5. [5]CustomersSierra · accessed Oct 8, 2026
  6. [6]Outcome-based pricing for AI agentsSierra · accessed Oct 8, 2026

Billing

By contract

Not published; sold by contract. Sierra says it uses outcome-based pricing1, with consumption-based pricing (by conversation count) for some interactions such as routing6.

What counts: Sierra says outcomes are tied to business results such as a resolved support conversation, a saved cancellation, an upsell or a cross-sell, with criteria agreed with each customer up front. In most cases, unresolved or escalated conversations are not charged6.

Ask what counts as a billable outcome, and whether there is a minimum commitment.

How AI support is billed

Reviews found

About the AI
0
Sources
0
Collected
Oct 8, 2026
Where we looked
  • Trustpilot sierra.ai: 0 reviews
  • AWS Marketplace reviews page (prodview-juxdqyapn54uo): 0 reviews, 0 external reviews
  • TrustRadius /products/sierra: 404
  • G2: 403
  • Reddit (2 searches): no threads found
  • No public review platform with readable Sierra reviews found

Also in AI agents

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