Lang.ai

aid: langai
name: Lang.ai
description: 'Lang.ai is a conversation-intelligence platform that turns unstructured customer interactions — support tickets,
  chatbot messages, emails and calls — into structured intents, features and tags. Its unsupervised algorithm ingests a dataset
  of customer text, automatically extracts the intents and features it finds, and lets teams group those into tags that form
  a custom classifier for any language, industry or business case. A small REST API then applies that classifier in real time:
  create a project from a CSV dataset, list projects and their tags, analyze a document to get back its matched tags and intents,
  and save documents with arbitrary metadata for dashboard reporting. Lang.ai was founded in Spain, backed by 500 Global,
  and is now part of Capacity, whose AI support-automation platform absorbed Lang.ai''s conversation intelligence.'
image: https://docs.lang.ai/images/logo-lang.svg
url: https://raw.githubusercontent.com/api-evangelist/langai/refs/heads/main/apis.yml
x-type: company
x-source: vc-portfolio
x-backed-by:
- 500-global
x-tier: enriched
x-tier-reason: documented-rest-api
x-status: acquired
x-acquired-by: Capacity
x-acquisition-note: lang.ai now redirects to https://capacity.com/lang/ ("Lang AI is now part of Capacity"). The Lang.ai API
  reference at https://docs.lang.ai/ and the help center at https://help.lang.ai/ remain live; commercial, legal, status and
  compliance properties are Capacity's.
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-19'
tags:
- Company
- Artificial Intelligence
- Machine Learning
- Natural Language Processing
- Conversation Intelligence
- Customer Support
- Text Classification
- Analytics
- Customer Experience
apis:
- aid: langai:api
  name: Lang.ai API
  description: REST API for building and applying custom text classifiers. Create a project from a dataset of customer interactions,
    list projects and their tags, analyze a document to receive its matched tags and intents, and save documents with metadata
    into a project for dashboard reporting. Authenticated with a bearer API token issued from the Settings section of your
    Lang.ai instance.
  humanURL: https://docs.lang.ai/
  baseURL: https://company.lang.ai/api/v1
  x-baseURL-template: https://{company}.lang.ai/api/v1
  x-baseURL-note: Lang.ai is deployed per tenant; the documented service URL uses your own instance subdomain in place of
    "company".
  tags:
  - Text Classification
  - Natural Language Processing
  - Conversation Intelligence
  properties:
  - type: OpenAPI
    url: openapi/langai-api-openapi.yml
  - type: Documentation
    url: https://docs.lang.ai/
  - type: APIReference
    url: https://docs.lang.ai/
  - type: Authentication
    url: authentication/langai-authentication.yml
  - type: ErrorCatalog
    url: errors/langai-problem-types.yml
  - type: Overlay
    url: overlays/langai-api-overlay.yaml
  - type: DataModel
    url: data-model/langai-data-model.yml
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- type: Website
  url: https://lang.ai
- type: DeveloperPortal
  url: https://docs.lang.ai/
- type: Documentation
  url: https://docs.lang.ai/
- type: APIReference
  url: https://docs.lang.ai/
- type: GettingStarted
  url: https://docs.lang.ai/#workflow
- type: Support
  url: https://help.lang.ai/
- type: HelpCenter
  url: https://help.lang.ai/
- type: GitHubOrganization
  url: https://github.com/lang-ai
- type: Blog
  url: https://capacity.com/blog/
- type: Pricing
  url: https://capacity.com/pricing/
- type: SignUp
  url: https://capacity.com/lang/
- type: TermsOfService
  url: https://capacity.com/website-terms-of-use/
- type: PrivacyPolicy
  url: https://capacity.com/privacy-policy/
- type: StatusPage
  url: https://status.capacity.com/
- type: Compliance
  url: https://capacity.com/security/
- type: Authentication
  url: authentication/langai-authentication.yml
- type: Conventions
  url: conventions/langai-conventions.yml
- type: Idempotency
  url: conventions/langai-conventions.yml
- type: ErrorCatalog
  url: errors/langai-problem-types.yml
- type: Lifecycle
  url: lifecycle/langai-lifecycle.yml
- type: Conformance
  url: conformance/langai-conformance.yml
- type: DataModel
  url: data-model/langai-data-model.yml
- type: MCPServer
  url: mcp/langai-mcp.yml
- type: LLMsTxt
  url: llms/langai-llms.txt
- type: AgentSkill
  url: skills/_index.yml
- type: Overlay
  url: overlays/langai-api-overlay.yaml
- type: DomainSecurity
  url: security/langai-domain-security.yml
- type: VulnerabilityDisclosure
  url: security/langai-vulnerability-disclosure.yml
- type: TrustCenter
  url: security/langai-trust-center.yml
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence