Synthesis AI

aid: synthesis-ai
name: Synthesis AI
description: 'Synthesis AI was a San Francisco synthetic-data company, founded in 2019 by Yashar Behzadi, that generated photorealistic,
  pixel-perfectly labeled images of humans for training computer-vision models. It sold that capability as an API: FaceAPI
  for labeled facial imagery and, from November 2021, HumanAPI for whole-body 3D digital humans, plus an Identities API for
  selecting subjects. Jobs were described as JSON documents (identities, expressions, gaze, head turn, hair, accessories,
  bodies and clothing, gesture animations, camera and light rigs, HDRI environments) and submitted through a command-line
  client or web console, with rendered output downloaded by job ID. The company raised a $17M Series A in 2022 on more than
  $24M total funding and was dissolved during 2024-2025. Its API is gone: synthesis.ai is a parked Gandi holding page reachable
  only over HTTP, and docs.synthesis.ai and api.synthesis.ai no longer resolve. What survives publicly is the Synthesis-AI-Dev
  GitHub organization (17 public repositories, including the Human API input-JSON appendix and the client tooling) and the
  official synthesisai package on PyPI.'
url: https://raw.githubusercontent.com/api-evangelist/synthesis-ai/refs/heads/main/apis.yml
deliveryModel:
  model: library
  open_source: false
  commercial: false
  callable_host: false
  label: Library · distributed through package registries, no callable service
  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
  probe_state: none
  source:
  - security
  generated: '2026-11-06'
  method: derived
image: https://avatars.githubusercontent.com/u/55990723?v=4
x-type: company
x-source: harvest:secondary-market
x-tier: stub
x-tier-reason: harvest
specificationVersion: '0.23'
created: '2026-08-05'
modified: '2026-10-06'
tags:
- Company
- Synthetic Data
- Computer Vision
- Machine Learning
- Artificial Intelligence
- Digital Humans
- Training Data
- 3D
tags_raw:
- Company
- Synthetic Data
- Computer Vision
- Machine Learning
- Artificial Intelligence
- Digital Humans
- Training Data
- 3D
- Computer-Vision
- Machine-Learning
apis: []
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
common:
- url: http://synthesis.ai/blog/
  type: Blog
- type: Website
  url: http://synthesis.ai/
- type: GitHubOrganization
  url: https://github.com/Synthesis-AI-Dev
- type: LinkedIn
  url: https://www.linkedin.com/company/synthesis-ai
- type: SecondaryMarket
  url: https://forgeglobal.com/synthesis-ai_stock/
- type: Packages
  url: packages/synthesis-ai-packages.yml
- type: Lifecycle
  url: lifecycle/synthesis-ai-lifecycle.yml
- type: DomainSecurity
  url: security/synthesis-ai-domain-security.yml
- type: Examples
  name: Human API job request (complex example, verbatim from the provider's GitHub)
  url: examples/synthesis-ai-human-api-job-complex-example.json
x-enrichment:
  date: '2026-08-05'
  status: minimal
  artifacts_added: 4
  pass: local-v1
x-coverage:
  state: none
  reason: defunct
  detail: Synthesis AI was dissolved during 2024-2025 — synthesis.ai now answers only over HTTP with a Gandi "parked by the
    owner" page (the identical 2332-byte body is returned for every path, including a control path, so every 200 is a soft-404),
    and the FaceAPI/HumanAPI documentation host docs.synthesis.ai has been removed from DNS entirely.
  evidence:
  - url: http://synthesis.ai/
    status: 200
  - url: http://synthesis.ai/openapi.json
    status: 200
  - url: http://synthesis.ai/this-path-does-not-exist-ae-control-12345
    status: 200
  - url: https://docs.synthesis.ai/
    status: 0
  checked: '2026-08-05'