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.'
deliveryModel:
  model: saas
  open_source: false
  commercial: true
  callable_host: true
  label: Hosted service · you call their endpoint
  confidence: high
  source:
  - openapi
  - pricing
  generated: '2026-08-28'
  method: derived
accessModel:
  pricing: paid
  onboarding: unknown
  trial: false
  try_now: false
  public: false
  label: Paid
  confidence: high
  source:
  - plans
  - authentication
  - rate-limits
  - security
  - sandbox
  - url: https://lang.ai
    status: 301
    note: declared website redirects to https://capacity.com/lang/?company=lang.ai — a different registrable domain (lang.ai
      -> capacity.com), possible rename or acquisition (probed 2026-09-03, roadmap#169)
  generated: '2026-09-03'
  method: derived
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: '0.23'
created: '2026-07-17'
modified: '2026-08-14'
x-docs-platform: slate
x-docs-platform-confidence: medium
x-docs-platform-checked: 2026-10-03
tags:
- Company
- Artificial Intelligence
- Machine Learning
- Natural Language Processing
- Conversation Intelligence
- Customer Service
- Text Classification
- Analytics
- Customer Experience
tags_raw:
- Company
- Artificial Intelligence
- Machine Learning
- Natural Language Processing
- Conversation Intelligence
- Customer Support
- Text Classification
- Analytics
- Customer Experience
- Machine-Learning
- Customer-Support
apis:
- aid: langai:langai-documents-api
  name: Lang.ai Documents API
  description: Analyze and save documents against a project.
  humanURL: https://docs.lang.ai/
  baseURL: https://company.lang.ai/api/v1
  tags:
  - Documents
  properties:
  - type: OpenAPI
    url: openapi/langai-documents-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: DataModel
    url: data-model/langai-data-model.yml
- aid: langai:langai-projects-api
  name: Lang.ai Projects API
  description: Create and inspect classification projects and their tags.
  humanURL: https://docs.lang.ai/
  baseURL: https://company.lang.ai/api/v1
  tags:
  - Project
  tags_raw:
  - Projects
  properties:
  - type: OpenAPI
    url: openapi/langai-projects-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: 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: AgenticAccess
  url: agentic-access/langai-agentic-access.yml
- 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: X-MCPServerCandidate
  url: mcp/langai-mcp.yml
  note: 'Renamed from MCPServer 2026-09-03 (roadmap#247): the manifest self-describes as status: candidate — a tool list derived
    from the published API contracts, not an existing server. The scorer already read the manifest and reported mcp_server
    correctly; the MCPServer type was crediting the artifact-type surfaces with a server that does not exist.'
- 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
- type: ChangeLog
  url: changelog/langai-changelog.yml
- type: ChangeLog
  url: https://roadmap.lang.ai/changelog
- type: Roadmap
  url: https://roadmap.lang.ai/
- type: Plans
  url: plans/langai-plans-pricing.yml
- type: RateLimits
  url: rate-limits/langai-rate-limits.yml
- type: Examples
  url: examples/langai-request-examples.yml
- type: Packages
  url: packages/langai-packages.yml
x-enrichment:
  date: '2026-08-14'
  status: enriched
  artifacts_added: 6
  pass: local-v1
  note: 'Contract discovery re-run across five hosts (lang.ai, docs.lang.ai, help.lang.ai, capacity.com, api.capacity.com).
    Newly found: the public Canny changelog + RSS feed at roadmap.lang.ai, the Snowflake Marketplace Native App, and the empty
    langai-python SDK repo. No agent card, no MCP server, no AsyncAPI, no OAuth, no sandbox, no SDK.'