Stop wondering how your software is used. Start measuring.

Instead of maintaining and distributing your open-source project in the dark, take steps to ensure its success. Scarf helps you understand how your code is used and connects you with the right people at the companies that rely on your work.

Trusted by open-source organizations and businesses

How it works

Would you like to understand your project's impact, identify potential customers, or showcase growth without sacrificing end-user privacy? Scarf helps you understand how users are interacting with your open-source project at every step of their journey with your software.

User discovers your project and navigates to the sections of your docs that interest them to learn more.

User downloads your package via the Scarf Gateway and begins to use it - from local development to production

User engages with you and your community

User discovers your project and navigates to the sections of your docs that interest them to learn more.

User downloads your package via the Scarf Gateway and begins to use it -from local development to production

User engages with you and your community

Scarf Gateway

Scarf Gateway is an open-source service that provides a central access point to the containers and packages you distribute, no matter where they are hosted. Scarf Gateway sits in front of your current registry and seamlessly redirects your download traffic to it, while empowering you with valuable usage data that your registry is not sharing. You gain better observability into how your software is used, putting your project’s distribution and data back in your control.

See which companies are downloading your containers and files, where in the world your downloads are coming from, whether or not they come from a CI pipeline, and much more.

Scarf gateway illustration

SDKs for package authors

Scarf's SDKs provide an easy way to understand how your software is being used. By simply adding a dependency on a Scarf library (eg scarf-js), you can start collecting actionable installation analytics that can help you keep your package working smoothly.

Want to know which versions of your package are being used? Did your most recent release break things for your users? Are there companies using your library that would pay you for a support contract? You won't have to write a single line of code to find out!

Scarf package authors illustration

Documentation Insights

Scarf's Documentation Insights provides simple tracking pixels for a better understanding of your project's web traffic. By instrumenting your READMEs, documentation websites, tutorial pages and other web properties of your project, Scarf can tell you which companies are frequently viewing your documentation—providing access to those more likely to pay for training or support.

The tracking pixel will never get in the way, and as with all of Scarf's OSS telemetry tools, Scarf does not store any personally identifiable information about your users.

Scarf Documentation insights illustration

The Scarf Gateway is the missing admin dashboard for our container hosting, making it easy to understand how quickly new versions of Linkerd are being adopted and which components are being deployed—data that the container registries have and don't share with us otherwise. It's awesome that Scarf can get this information into the hands of project maintainers without compromising the privacy of our users.

-Oliver Gould, Co-Founder & CTO Buoyant

“Vectorized has been using Scarf to understand how Redpanda is being adopted, and most importantly, how to prioritize engineering efforts for the product. Turns out the world loves Redpanda + Kubernetes more than we thought!”

-Alexander Gallego CEO, Founder, Vectorized

It’s important for us to understand who is using [our OSS web framework] IHP. Before using Scarf we’ve mostly relied on the data set of existing customers. . . . It only took us a couple of minutes to integrate the Scarf Gateway. With Scarf, we now understand much more about the new users starting their journey into IHP. . . . Now we’re regularly using the numbers in our marketing meeting.

-Marc Scholten, Founder, digitally induced

A new model for commercial open-source software

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Analytics for maintainers

Releasing open-source code doesn't mean you have to relinquish the ability to understand how your software is used.

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Connect with companies relying on your work

Scarf's analytics help you uncover which companies are using your project and understand their needs

Help your commercial users. Get paid. icon

Grow your business with your commercial users

Scarf helps you land support agreements with your users, deliver custom features, and more. We provide everything you need to build a financially successful OSS project.


Scarf Gateway is free to use! To gain access to additional features talk to us.

Choose your plan & take control of your software distribution.


Scarf Gateway
Documentation Insights
Custom domains
Basic data insights
Developer API
Team-based access control
Get Started


Lead generation
Raw data export
Advanced data insights
Dedicated customer support
Registry mirroring & failover
Availability SLA
External data integrations
Proxy and cache controls
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