# Sierra

**Canonical:** https://apis.io/providers/sierra/  
**Website:** https://sierra.ai  
**APIs profiled:** 1

Sierra is an enterprise conversational AI platform co-founded by Bret Taylor that builds and operates customer-facing AI agents across chat, SMS, WhatsApp, email, voice, and ChatGPT. Its Agent OS includes Agent Studio for building agents, Ghostwriter for agent generation from SOPs and transcripts, Insights for analytics, an Agent Data Platform for personalization, Voice Agents, and Live Assist for human handoff. Sierra is enterprise sales-led with no self-serve public developer API; integrations and Agent SDK access are provisioned through customer engagements.

## Kin Score — 23.6 / 100 (emerging)

Scored 2026-08-20 under rubric 0.12.0. Trend: flat (+0.0 from 23.6).

| Facet | Score |
|---|---|
| Discoverability | 59.3 |
| Contract Quality | 0.0 |
| Governance | 0.0 |
| Contract Governance | 0.0 |
| Operational Transparency | 23.7 |
| Developer Ergonomics | 21.4 |
| Commercial Clarity | 51.3 |
| Access Clarity | 51.3 |

## Agent readiness — 3.0 (human-only)

| Dimension | Value |
|---|---|
| Spec Presence | no |
| Agentic Access | no |
| Reversibility Documented | no |
| MCP Server | no |
| Auth Clarity | no |
| Idempotency | no |
| Error Semantics | no |
| OpenAPI Examples | no |
| Rate Limit Signal | documented |
| Event Surface Described | no |
| Agent Skills | no |
| Well Known Catalog | no |
| Consent Identity | no |
| Agent Card | no |
| Dry Run Mode | no |

## Access

Free — onboarding: unknown, pricing: free, trial: no (confidence: medium).

## APIs (1)

- **Sierra Agent OS** — Sierra Agent OS is the enterprise platform for building, deploying, and operating customer-facing AI agents. It includes Agent Studio, Ghostwriter, Insights, the Agent Data Plat...

## Security (3)

- **Sierra Domain Security** — TLSv1.3 · HSTS · DMARC
- **Sierra Vulnerability Disclosure** — Hackerone · security.txt · contact published
- **Sierra Trust Center** — PCI DSS, HIPAA

## Plans (1)

- **Sierra Plans Pricing**

## Use cases (3)

- **Customer Service Automation** — Resolve customer support inquiries autonomously across channels.
- **Voice IVR Replacement** — Replace traditional IVR with natural conversational voice agents.
- **Subscription Retention** — Reduce subscription cancellations through proactive agent engagement.

## Tags

Agents, Artificial Intelligence, Chat, Conversational AI, Customer Experience, Customer Service, Enterprise, Voice

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Profiled by [API Evangelist](https://apievangelist.com) and published on [APIs.io](https://apis.io/providers/sierra/). Scores are computed from the provider's own public artifacts under a published rubric.