Ultimate.ai

aid: ultimateai
name: Ultimate.ai
description: Ultimate.ai was a Helsinki- and Berlin-based customer support automation platform - virtual agents and chatbots
  with intent recognition and agent-assist - backed by HV Capital and Techstars. Zendesk acquired Ultimate.ai in 2024 and
  the product now ships as Zendesk AI agents (the "AI agents - Advanced" add-on); ultimate.ai redirects to zendesk.com and
  the successor AI Agents APIs (Chat, Ticket, Widget Escalation, Data Export, Delete User Data plus webhooks) are documented
  on developer.zendesk.com, with API keys still generated from the Ultimate.ai dashboard. The legacy Ultimate.ai Public API
  on chat.ultimate.ai is retired.
url: https://raw.githubusercontent.com/api-evangelist/ultimateai/refs/heads/main/apis.yml
deliveryModel:
  model: unknown
  open_source: false
  commercial: false
  callable_host: false
  label: Delivery model not determined — needs a product licence on record
  confidence: low
  source:
  - none
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: unknown
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Unknown
  confidence: low
  source:
  - authentication
  - security
  - url: https://ultimate.ai/
    status: 301
    note: declared website redirects to https://www.zendesk.com/service/ai/ai-agents/ — a different registrable domain (ultimate.ai
      -> zendesk.com), possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-09-03'
  method: derived
image: https://avatars.githubusercontent.com/u/82862471?v=4
x-type: company
x-source: vc-portfolio
x-backed-by:
- hv-capital
- techstars
x-acquired-by: zendesk
x-tier: stub
x-tier-reason: portfolio-lead
x-enrichment:
  date: '2026-07-21'
  status: enriched
  artifacts_added: 6
  pass: local-v1
specificationVersion: '0.23'
created: '2026-07-17'
modified: '2026-07-21'
tags:
- Company
- Ai Enterprise Software
- Customer-Support
- Conversational AI
- Chatbots
- AI Agents
- Automation
- Acquired
tags_raw:
- Company
- Ai Enterprise Software
- Customer Support
- Conversational AI
- Chatbots
- AI Agents
- Automation
- Acquired
apis:
- name: Zendesk AI Agents API (formerly Ultimate.ai)
  description: Successor API surface of the Ultimate.ai platform after the Zendesk acquisition - Chat, Ticket, and Widget
    Escalation APIs with matching webhooks, plus Data Export and Delete User Data. Requires the AI agents - Advanced add-on;
    authenticates with a Custom CRM or organization API key generated from the Ultimate.ai dashboard.
  humanURL: https://developer.zendesk.com/api-reference/ai-agents/introduction/
  baseURL: https://{subdomain}.zendesk.com/ai-agents/api
  tags:
  - AI Agents
  - Chatbots
  - Webhook
  tags_raw:
  - AI Agents
  - Chatbots
  - Webhooks
  properties:
  - type: Documentation
    url: https://developer.zendesk.com/documentation/ai-agents
  - type: APIReference
    url: https://developer.zendesk.com/api-reference/ai-agents/introduction/
  - type: Authentication
    url: https://developer.zendesk.com/api-reference/ai-agents/authentication/
- name: Ultimate.ai Public API (legacy, retired)
  description: 'The original Ultimate.ai Public API on chat.ultimate.ai - Chat Automation (POST /api/v2/automation), Intent
    Recognition (POST /api/intents), and Delete User Data (POST /api/gdpr/delete-user-data) - documented in a Slate docs repo
    in the ultimateai GitHub org. Probed 2026-07-21: endpoints return 404; superseded by the Zendesk AI Agents API.'
  humanURL: https://github.com/ultimateai/public-api
  baseURL: https://chat.ultimate.ai
  x-status: retired
  tags:
  - Chatbots
  - Intent Recognition
  - GDPR
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://ultimate.ai/
- type: Documentation
  url: https://developer.zendesk.com/documentation/ai-agents
- type: APIReference
  url: https://developer.zendesk.com/api-reference/ai-agents/introduction/
- type: GitHubOrganization
  url: https://github.com/ultimateai
- type: Authentication
  url: authentication/ultimateai-authentication.yml
- type: Webhooks
  url: asyncapi/ultimateai-ai-agents-webhooks.yml
- type: ErrorCatalog
  url: errors/ultimateai-problem-types.yml
- type: LLMsTxt
  url: llms/ultimateai-llms.txt
- type: DomainSecurity
  url: security/ultimateai-domain-security.yml