Siena

Siena AI is an empathic AI agent platform built for commerce brands. It combines AI automation with human empathy to handle customer service across email, chat, SMS, social, and WhatsApp, and integrates with Shopify, Gorgias, Zendesk, Kustomer, Recharge, Klaviyo and 20+ commerce tools. Its agents cover support, shopping, reviews, QA, order tracking, and post-purchase workflows, letting brands automate 60-80% of support tickets while preserving brand voice. Siena is backed by Sierra Ventures and holds SOC 2 Type II, GDPR, CPRA, and HIPAA compliance.

Siena is profiled on the APIs.io network. Tagged areas include Company, Artificial Intelligence, AI Agents, Customer Service, and Customer Experience.

Siena’s developer surface includes documentation, pricing, engineering blog, and 12 more developer resources.

🌐 Visit website 📡 Source on GitHub

20.4/100 emerging ▬ flat Agent 0/100 human only saas Full breakdown ↓
scored 2026-09-08 · rubric v0.20.0

0 APIs

Company Artificial Intelligence AI Agents Customer Service Customer Experience Conversational AI E-Commerce Support Automation

Kin Score

Kin Score How this is scored →
scored 2026-09-08 · rubric v0.20.0

Composite quality — 20.4/100 · emerging

Contract Quality 0.0 / 25

Developer Ergonomics 0.5 / 20

Access Clarity 10.8 / 20

Operational Transparency 3.4 / 13

Contract Governance 0.0 / 12

Discoverability 5.7 / 10

Agent readiness — 0/100 · human only

Machine-Readable Contract 0 / 18

Agentic Access Contract 0 / 10

Documented Reversibility 0 / 6

MCP Server 0 / 12

Machine-Readable Auth 0 / 10

Idempotency 0 / 9

Stable Error Semantics 0 / 8

Request/Response Examples 0 / 7

Rate-Limit Signaling 0 / 7

Typed Event Surface 0 / 6

Agent Skills 0 / 5

Well-Known Catalog 0 / 4

Consent & Bot Identity 0 / 3

A2A Agent Card 0 / 8

Dry-Run / Simulate Mode 0 / 4

Delegated User Identity 0 / 6

Protected Resource Metadata 0 / 5

Registration Without a Human 0 / 6

Agentic Commerce Well-Known Document 0 / 5

Create-or-Update Ergonomics could not be measured. We hold no machine-readable contract for this provider to read, so there is nothing to measure a write surface against. Excluded rather than scored zero: never-measured and measured-empty are different facts. Publishing an OpenAPI is what makes this facet — and several others — scorable at all.

Improve this rating by publishing the missing artifacts — every area above can be raised, and the full rubric is at apis.io/rating/. Every facet and dimension name above is a link: it opens that measurement's own page — what it means, the exact checks that feed it, how the whole catalog distributes on it, and the providers at the top of it. This rating is computed from github.com/api-evangelist/siena: open an issue to ask a question, or submit a pull request to add artifacts. Submit an artifact on GitHub — free → Manage your own listing — the Influence plan, $499/mo →

Security Posture 3

Authentication, domain security, vulnerability disclosure, and trust-center signals.

Siena Domain Security

TLSv1.3 · HSTS · DMARC

SECURITY

Siena Vulnerability Disclosure

Hackerone · contact published

SECURITY

Siena Trust Center

SOC 2 Type II, GDPR, CPRA, HIPAA

SECURITY

Resources

Get Started 1

Portal, sign-up, and the first successful call

Login

Documentation 1

Reference material describing how the API behaves

Documentation

Documentation

Agent Surfaces 1

MCP servers, agent skills, and machine-readable catalogs

LLMsTxt

LLMsTxt

Design & Contract 1

Pagination, idempotency, versioning, errors, and events

Lifecycle

Lifecycle

Access & Security 5

Authentication, authorization, and security posture

DomainSecurity

DomainSecurity

TrustCenter

TrustCenter

Compliance

Compliance

VulnerabilityDisclosure

VulnerabilityDisclosure

Security

Security

Operate 1

Status, limits, changes, and where to get help

StatusPage

StatusPage

Commercial 3

Pricing, plans, and the legal terms of use

Pricing

Pricing

TermsOfService

TermsOfService

PrivacyPolicy

PrivacyPolicy

Company 2

The organization behind the API

Website

Website

Blog

Blog

Source (apis.yml)

aid: siena
name: Siena
description: Siena AI is an empathic AI agent platform built for commerce brands. It combines AI automation with human empathy
  to handle customer service across email, chat, SMS, social, and WhatsApp, and integrates with Shopify, Gorgias, Zendesk,
  Kustomer, Recharge, Klaviyo and 20+ commerce tools. Its agents cover support, shopping, reviews, QA, order tracking, and
  post-purchase workflows, letting brands automate 60-80% of support tickets while preserving brand voice. Siena is backed
  by Sierra Ventures and holds SOC 2 Type II, GDPR, CPRA, and HIPAA compliance.
url: https://raw.githubusercontent.com/api-evangelist/siena/refs/heads/main/apis.yml
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: false
  label: Hosted service · you call their endpoint
  confidence: medium
  source:
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source: []
  generated: '2026-07-22'
  method: derived
image: https://framerusercontent.com/assets/FHZo6GH2CeM1egfYU9t6ZdbpY.jpg
x-type: company
x-source: vc-portfolio
x-backed-by:
- sierra-ventures
x-tier: stub
x-tier-reason: portfolio-lead
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Artificial Intelligence
- AI Agents
- Customer Service
- Customer Experience
- Conversational AI
- E-Commerce
- Support Automation
tags_raw:
- Company
- AI
- AI Agents
- Customer Service
- Customer Experience
- Conversational AI
- Ecommerce
- Support Automation
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://siena.cx/
- type: Documentation
  url: https://docs.siena.cx/
- type: Pricing
  url: https://www.siena.cx/pricing
- type: Blog
  url: https://www.siena.cx/blog
- type: Login
  url: https://app.siena.cx/
- type: TermsOfService
  url: https://www.siena.cx/terms-of-service
- type: PrivacyPolicy
  url: https://www.siena.cx/privacy-policy
- type: Integrations
  url: https://www.siena.cx/integrations
- type: StatusPage
  url: https://status.siena.cx/
- type: LLMsTxt
  url: llms/siena-llms.txt
- type: DomainSecurity
  url: security/siena-domain-security.yml
- type: Lifecycle
  url: lifecycle/siena-lifecycle.yml
- type: TrustCenter
  url: security/siena-trust-center.yml
- type: Compliance
  url: https://sienaai.trust.site/
- type: VulnerabilityDisclosure
  url: security/siena-vulnerability-disclosure.yml
- type: Security
  url: security/siena-vulnerability-disclosure.yml
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 6
  pass: local-v1

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