AtomicJar Raises $25 Million in Series A Funding  

by Kay Aloha Villamor in January 26th, 2023

AtomicJar, a New York-based company behind the open-source library Testcontainers, raised $25 million in Series A funding and released the public beta of Testcontainers Cloud. 

The round was led by Insight Partners, with participation from Boldstart Ventures, Tribe Capital, Chalfen Ventures, Snyk co-founder Guy Podjarny, and Snyk CEO Peter McKay.

The company intends to use the funds to scale its development team, increase the number and types of databases and languages that the Testcontainers open-source libraries support, and improve the shift-left testing developer experience with Testcontainers Cloud.

The company plans to tap into Canada's "huge" tech talent pool after raising Series A funding.

AtomicJar’s open-source Testcontainers product hit 50 million downloads in April 2022. By the end of last year, the offering had doubled that, growing at a rate of around six million per month.

In response to this demand, the company is gearing up to roll out its first commercial solution, Testcontainers Cloud, starting with a beta available today. To date, the open-source project is used by companies like Uber, Netflix, Spotify, and Capital One.

This round of funding brings the firm’s total raised to $29 million. As part of the round, Insight managing director Jon Rosenbaum has joined AtomicJar’s board.

Company: AtomicJar, Inc.

Raised: $25.0M

Round: Series A

Funding Month: January 2023

Lead Investors: Insight Partners

Additional Investors: Boldstart Ventures, Tribe Capital, Chalfen Ventures, Guy Podjarny, and Peter McKay

Company Website:

Software Category: Developer Tools

About the Company: Founded by Sergei Egorov and Eli Aleyner, AtomicJar is a software company that provides an integration testing platform that enables developers to build databases and web frameworks. It aims to simplify integration testing for developers throughout the software development lifecycle. It gives developers methods for testing with containers and anything running inside containers, against the many dependencies code integrates within production. AtomicJar is on a mission to build tools that developers love, and change automated testing for the better.


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