aid: atomicjar
name: AtomicJar
description: >-
  AtomicJar is a developer-testing company, founded in 2021 by the original
  creators and maintainers of the open-source Testcontainers project and
  acquired by Docker in December 2023. AtomicJar builds tooling that lets
  developers run reliable integration tests against real service dependencies
  (databases, message brokers, and other systems) defined in code and wrapped
  in Docker containers, replacing brittle mocks and in-memory fakes. Its product
  line spans Testcontainers OSS (the open-source libraries for Java, .NET, Go,
  Node.js, Python, Rust, and more), Testcontainers Desktop (a companion app for
  local development), and Testcontainers Cloud (a hosted service that offloads
  container execution to the cloud so tests run consistently from a laptop
  through CI without a local Docker daemon). AtomicJar and its Testcontainers
  products are used by engineering teams at companies including Spotify, Uber,
  Capital One, Elastic, Netflix, and Zalando.
url: https://raw.githubusercontent.com/api-evangelist/atomicjar/refs/heads/main/apis.yml
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://www.atomicjar.com/wp-content/uploads/2022/08/aj-featured-image.png
x-type: company
x-source: vc-portfolio
x-backed-by:
- insight-partners
x-tier: stub
x-tier-reason: portfolio-lead
x-status: acquired-by-docker-2023-12
specificationVersion: '0.20'
created: '2026-07-17'
modified: '2026-07-18'
tags:
- Company
- Devops
- Testing
- Integration Testing
- Testcontainers
- Containers
- Developer Tools
- Continuous Integration
- Open Source
apis: []
common:
- type: DomainSecurity
  url: security/atomicjar-domain-security.yml
- type: Website
  url: https://www.atomicjar.com/
- type: DeveloperPortal
  url: https://testcontainers.com/
- type: Documentation
  url: https://testcontainers.com/cloud/docs/
- type: GettingStarted
  url: https://testcontainers.com/getting-started/
- type: Blog
  url: https://www.atomicjar.com/blog/
- type: GitHubOrganization
  url: https://github.com/AtomicJar
- type: Pricing
  url: https://testcontainers.com/cloud/pricing/
- type: SignUp
  url: https://app.testcontainers.cloud/signup
- type: Login
  url: https://app.testcontainers.cloud/login
- type: Support
  url: https://slack.testcontainers.org/
- type: PrivacyPolicy
  url: https://www.atomicjar.com/privacy-policy/
maintainers:
- FN: Kin Lane
  email: kin@apievangelist.com
- FN: APIs.json
  email: info@apis.io
x-enrichment:
  date: '2026-07-19'
  status: backfilled
  pass: local-v1
  note: backfilled from .gitignore signal + verified work evidence