Rating · evidence to 26 Sept 2026
Not enough evidence
- Trust B
The Register / Business & sales agents / Sierra
Register entry · Business & sales agents · updated 26 Sept 2026
Sierra
Sierra Technologies, Inc. · Business & sales agents
Sierra builds customer-service AI agents for large enterprises, sold through a sales-led, largely managed-service engagement with outcome-based pricing. Its platform includes Ghostwriter (agent generation from SOPs and transcripts), Agent Studio (analytics, monitors, experiments) and Horizon (long-horizon planning and proactive engagement). Integrations with customer systems are typically built through its Agent SDK rather than native helpdesk connectors.
What reviewers and users praise
- Completes actions (refunds, account changes) rather than only answering questions (Cybernews review)
- Heavy emphasis on guardrails and policy checks for regulated industries (Cybernews review)
- Positioned for agent-first architectures at large enterprises (Forrester Wave Q2 2026, Strong Performer)
What they criticise
- No public pricing, free trial or self-serve access (Cybernews review)
- Managed-service model: deployments take months and later changes often go through Sierra's team (Cybernews review)
- No native connectors for Zendesk, Intercom or Salesforce; integrations are custom SDK work (Cybernews review)
Experts vs the crowdneeds both scores
Experts—
Crowd—
| Price | Custom |
|---|---|
| Use it via | Web app, Chat apps, API |
| Runs on | web |
| Licence | proprietary |
| Updated | Evidence collected 26 Sept 2026 |
How the rating was worked out
Weights for Business & sales agents: adoption 25%, experts 40%, crowd 35%. Fewer than two pillars have enough evidence. The method.
| Adoption & momentumweight 25% | — | No public reach signal found |
|---|---|---|
| Expertsindependent reviews · weight 40% | — | Only 1 independent review (3 needed) |
| Crowdcommunity sample · weight 35% | — | Only 1 community item sampled (6 needed) |
| Rating | — | Not rated: fewer than two pillars have enough evidence. |
Evidence checks. 1 item could not be checked at the source (the page could not be fetched, or the quote is from a comment under the linked post); kept and marked “unverified”. How evidence is checked.
Trust & safety
Seven dimensions graded A–D from documented facts. Overall: B.
n/e
Permission model
Sierra describes deterministic, policy-controlled agent interactions and release governance for agent changes; the sandbox/approval rubric does not map cleanly onto a hosted customer-service agent and no per-action approval documentation was found. source
n/e
Data access scope
Agents access customer systems through integrations built per deployment; no public documentation of access scoping found. source
C
Data storage
Hosted SaaS. PII shared with the agent is encrypted and masked; no public documentation of region selection or deletion controls found. source
C
Data retention & training
Public statement: 'Your data is only used as you instruct, and is never shared with other customers.' No explicit no-training guarantee or retention period published. source
A
Incident history (24 months)
No security incidents or CVEs for Sierra (the AI company) found in a search on 2026-09-26. source
A
Compliance
Sierra states SOC 2, HIPAA, GDPR, PCI, FedRAMP High, CCPA, CSA STAR, ISO 27001 and ISO 42001; blog confirms SOC 2 Type II attestation and AIUC-1 certification (Sept 2026). Trust center at trust.sierra.ai. source
C
Transparency
Closed source; no public docs portal or changelog; product news only via blog posts. source
The experts
2 named independent reviews found; dated reviews from the last 12 months are scored.
- positive
Sierra AI is one of the most advanced customer-facing enterprise AI agent platforms, especially for companies that deal with complex support workflows.
Cybernews (Greta Čeponė) · 23 Jun 2026 · unverified · cybernews.com - mixed
Founded in 2023, Sierra, led by former Salesforce co-CEO Bret Taylor, is already valued at $10 billion, winning over companies aspiring to jump straight to agent-first architectures
Forrester Research (Wave: Conversational AI Platforms for Customer Service, Q2 2026; summarised by CX Foundation) · 22 Apr 2026 · cxfoundation.com
The crowd
1 coded posts from hackernews.
1 positive0 mixed0 negative
- positive
I was responsible for overseeing a Sierra AI implementation to replace our tier 1 support bot... Containment from the bot alone shot up past 50%.
Salesforce to Acquire Fin thread · 16 Jun 2026 · news.ycombinator.com
Pricing
As published, checked 26 Sept 2026.
| Plan | Price | Notes |
|---|---|---|
| Enterprise | Custom | No public pricing; contact sales. Press and reviewers describe outcome-based pricing per resolved interaction; Sierra does not publish figures. |
Recent changes
- 17 Sept 2026
Announced AIUC-1 certification source
- 10 Sept 2026
Launched next-gen multimodal agents with a conversation-adaptive interface source
- 7 Aug 2026
Introduced Voice Personas source
- 16 Jul 2026
Launched Horizon for long-horizon agent planning source
- 5 May 2026
Raised $950M at a reported post-money valuation above $15B source
Ranked alongside
Other ranked entries in Business & sales agents.
Sources
Every figure above traces to one of these, observed up to 26 Sept 2026.