Yes, we're open source!

Don't think a bank can do open source? We'd like to change your mind.

Open source technology has changed how we think of collaboration, community building and continuous innovation. That’s why we launched the Capital One Open Source Program Office in 2015 and have made our open source-first approach to software development part of our culture.

Open Source First

We develop and open source software designed to meet the demands of our highly regulated industry.

Contributions to 100+ Projects

Our technologists have made thousands of contributions to more than 100 projects, including 25 of our own.

Invested in the Community

We sponsor the Cloud Native Computing Foundation, Python, FINOS, Apache and more to help keep open source sustainable.

Featured Open Source Projects


A data science tool designed to capture all information and artifacts relating to a model during training and monitoring.

Data Profiler

A Python library designed to make data analysis, monitoring and sensitive data detection easy.



Here, there and everywhere

Every year we sponsor and attend open source events like All Things Open, PyCon, KubeCon and more. Check out where we’ll be next.



Yes, we’re hiring!

Come help us change banking for good by using technology to serve our customers quicker and more easily than ever.

Sharing What We’ve Learned

The Enterprise Developer

A three-part series on operationalizing enterprise developers.

Open Source as the New Normal

Collaborative working makes smarter, more resilient tech.

Openness in a Regulated Industry

Watch our open source webinar at The Linux Foundation1.

Featured Open Source Articles

Open Source

Pandas DataFrame: How to concatenate with Python examples

Concatenation of DataFrames and Series with Python in Pandas

Open Source

Bleeding Edge Dependency Testing with edgetest

Capital One is open sourcing edgetest for bleeding edge dependency testing