Flox, a platform dedicated to streamlining the software creation process, has raised $25 million in its Series B funding round. The latest investment was led by Addition, a prominent venture capital firm, with participation from existing investors and new backers including NEA, the D. E. Shaw Group, Hetz Ventures, and Illuminate Financial. This financial boost aims to accelerate the development of Flox’s platform and broaden its reach into a market that is increasingly challenged by the complexities of modern software development.
The core issue Flox aims to address is the chaotic state of today’s software supply chains. As artificial intelligence tools become more capable of generating large amounts of code rapidly, the infrastructure supporting this process has struggled to keep pace. Developers frequently encounter problems such as broken dependencies, inconsistent testing environments, and security vulnerabilities that can hide amidst growing complexity. These issues often lead teams to spend excessive amounts of time on setup and troubleshooting rather than focusing on creating new features and innovations.
Flox’s solution centers on making the open-source technology Nix accessible and easy to use for engineering teams. Nix is recognized for its ability to create fully reproducible software environments, ensuring that code runs consistently across different systems. The Flox platform provides an intuitive interface built on top of this technology, enabling developers to define an environment once and then run it reliably across various operating systems, programming languages, and hardware architectures. This approach effectively eliminates the common problem where code runs perfectly on one machine but fails elsewhere.
The platform has already started making a significant impact across the industry. Several Fortune 5 companies, as well as high-growth tech firms such as Neo4j, PostHog, and Weaviate, are among its users. These organizations have demonstrated strong engagement with Flox, maintaining a high retention rate of approximately 70 percent, which indicates the platform’s effectiveness and popularity.
The new funding will be directed toward three strategic areas to enhance the platform’s capabilities. The first is the development of a Universal Development Infrastructure, which aims to ensure compatibility and seamless operation across all types of operating systems and hardware architectures. This will help maintain a consistent and frictionless environment for software development and deployment. The second focus will be on creating automated compliance and policy management frameworks that allow organizations to enforce security and governance rules as their codebases expand rapidly. The third area of focus involves building a Zero-CVE Security Infrastructure, which will offer real-time vulnerability detection, complete with a software bill of materials and adherence to industry standards. This will provide organizations with unparalleled visibility into the security of both human and AI-generated code.
Since launching Flox 1.0, the company has made considerable progress by delivering over 40 platform updates. These updates include features that provide detailed insight into dependencies, enforce standardization across software environments, and enable portability through reusable environment configurations. Additionally, the platform offers enterprise-grade features, including native integrations with major continuous integration and continuous deployment systems, as well as advanced security measures for supply chains that enable quick recovery from configuration failures.
Along with its core development efforts, Flox is positioning itself to serve the growing AI development community. The company has become one of a select few vendors authorized to distribute prebuilt CUDA binaries, which significantly reduces the time required for developers to access GPU infrastructure essential for AI workloads.
Collaborations with organizations like HackerRank also highlight Flox’s versatility, enabling standardized environments for technical interviews and assessments. The company’s overarching vision is to transform the way software is built and managed, shifting away from temporary fixes and toward creating a stable, predictable, and secure foundation for future technological innovation.
KEY QUOTES:
“The extreme pressure on engineering teams has made standardized development infrastructure a necessity. While everyone else is building on top of broken foundations, Flox is strengthening the foundation itself, enabling teams to move faster without sacrificing trust.”
Ron Efroni, CEO and Co-founder of Flox
“Flox takes the friction out of onboarding PostHog team members and contributors. Before, our local dev guide comprised 16 steps with 14 caveats. Now, it’s just a universal flox activate. Flox keeps the whole team on the same page, no matter how complex our stack gets.”
Michael Matloka, senior product engineer of PostHog
“Flox takes the power of Nix and makes it accessible for all. That’s why we’re seeing an influx of engagement compared to traditional developer tools, they’re solving the hidden infrastructure crisis every company faces.”
Flox Advisor and distinguished engineer, Kelsey Hightower
“Flox embodies the foundational transformation required for the next era of AI-driven, reliable software development. Instead of patching over problems with disconnected solutions, Flox delivers a comprehensive infrastructure platform that gives engineering teams unprecedented control and visibility at the most granular level. This is the kind of deep innovation the industry urgently needs and we are proud to be partnered with the Flox team.”
Todd Arfman, Partner at Addition
