AtomicJar Inc., the company behind the open-source library Testcontainers, today announced that it has raised $25 million in new funding to expand data support and improve the shift-left development experience with Testcontainers Cloud.

Founded in 2021 by the team behind Testcontainers, AtomicJar offers an integrated testing platform that enables developers to build databases and web frameworks. The platform aims to make developers more productive, the software they write more resilient and the organizations they work for more agile through Testcontainers and the Testcontainers Cloud.

Testcontainers Cloud offers installations in five minutes and provides consistency in test results, faster execution and elastic resources that it says are always available. The company says the service removes all hardware and software limitations, providing a productivity boost for engineering teams. Benefits include being able to test everything on laptops without worrying about resources, running test suites without scaling up a workforce and enhancing team efficiency by ensuring consistency from development to continuous integration.

AtomicJar has seen strong growth in its relatively short existence, with Testcontainers seeing a significant increase in Docker Hub downloads from 50 million to 100 million in 2022, a rate of 6 million downloads a month. Notable AtomicJar customers include DoorDash Inc., Spotify Technology SA, Uber Technologies Inc., Google LLC, Netflix Inc., Wise Payments Ltd., Elastic NV and Skyscanner Ltd.

“Hardly anything can be more expensive than a developer waiting for something and testing is a common reason for downtime,” Sergei Egorov, co-founder and chief executive officer of AtomicJar, said in a statement. “With Testcontainers, we are shifting testing to the left, from QA teams and staging environments to developers writing and running tests in IDEs. It is like Unit Testing but with real dependencies thanks to containers!”

Insight Partners led the Series A round with boldstart ventures, Tribe Capital, Chalfen Ventures, Irregular Expressions and several individuals also participating. Including the new funding, AtomicJar has raised $29.1 million to date, according to data from Crunchbase.

Photo: AtomicJar