copr.fedorainfracloud.org Review, Pricing & Features
What is Fedora Copr? A free, Red Hat-sponsored build system for hosting custom RPM package repositories, with mock-based chroot builds and API access.
Category
Productivity
Pricing
Free (open source, community/sponsored infrastructure, no paid tiers), from Free
Verified
Not yet
Last updated
July 19, 2026
Headquarters
Not applicable (hosted on Fedora Project infrastructure; Red Hat, the primary sponsor, is headquartered in Raleigh, North Carolina, United States)
What Fedora Copr Does
Fedora Copr is a free build system that turns a source RPM into a signed, installable package repository, letting anyone host third-party RPM repositories without going through official Fedora package review.
Users with a Fedora Account System (FAS) account create a project, submit a source RPM, and Copr builds binaries across selected distribution and architecture combinations automatically.
How Builds Work
Copr uses Mock, the same chroot-based build environment tool used for official Fedora and Koji builds, to isolate and build each package, and it signs the resulting repositories.
It supports both standard chroots matching released Fedora and EPEL versions and custom chroots for cases needing manual environment configuration, and it can sustain mass rebuilds of thousands of packages at once.
Governance, Hosting, and Access
Copr is sponsored by Red Hat and runs on infrastructure deployed within the Fedora Project, working closely with the Fedora Infrastructure team, though it is not officially guaranteed-supported infrastructure in the same way as core Fedora services.
The project is entirely free, open source, and maintained publicly on GitHub under the fedora-copr organization, with a Python client library available for programmatic access.
Key Features
Source RPM to repository builds — Converts a submitted source RPM into a signed, installable binary package repository automatically.
Multiple chroot targets — Builds packages across combinations of Fedora, EPEL, and other distribution versions and CPU architectures in a single project.
Mock-based build isolation — Uses Mock, the same chroot build tool behind official Fedora and Koji builds, for consistent, isolated build environments.
Custom chroots — Allows manual configuration of build environments for packages that do not fit standard distribution targets.
Mass rebuild capability — Can sustain rebuilding thousands of packages at once, used for Fedora-wide toolchain or ecosystem rebuild testing.
Signed repository output — Resulting package repositories are cryptographically signed for integrity and trust.
Free self-service project creation — Any user with a Fedora Account System account can create and manage build projects without cost.
API and Python client library — Provides a documented API and the python-copr client for programmatic and automated build management.
Pros & Cons
Pros
Completely free to use with no paid tiers
Uses the same trusted Mock build tooling as official Fedora infrastructure
Scales to mass rebuilds of thousands of packages
Signed repository output for package integrity
Open source project code publicly available on GitHub
Low barrier to entry with just a Fedora Account System account
Cons
Not officially guaranteed-supported Fedora infrastructure
Limited to RPM-based distributions, not usable for other package formats
Documentation and workflows assume familiarity with RPM packaging and Mock
No commercial support tier or SLA for critical production use
Interface and tooling are aimed at technical Linux packagers, not general users
Frequently Asked Questions
What is Fedora Copr?
Fedora Copr is a free build system at copr.fedorainfracloud.org that builds source RPMs into signed, installable package repositories for Fedora and other RPM-based distributions.
Is Fedora Copr free?
Yes, Copr is entirely free and open source with no paid pricing tiers.
Who runs Fedora Copr?
Copr is sponsored by Red Hat and hosted on Fedora Project infrastructure, maintained by the Fedora Copr community and the Fedora Infrastructure team.
Do I need an account to use Copr?
Yes, you need a Fedora Account System (FAS) account to create and manage build projects on Copr.
What build tool does Copr use internally?
Copr uses Mock, the same chroot-based build environment manager used for official Fedora and Koji package builds.
Can Copr handle large-scale rebuilds?
Yes, Copr can sustain mass rebuilds involving thousands of packages, such as Fedora-wide toolchain change testing or rebuilding language-ecosystem packages as RPMs.
Is Copr officially supported Fedora infrastructure?
Copr documentation notes it is not yet officially guaranteed-supported Fedora infrastructure, though it runs within Fedora Project infrastructure and works closely with the Fedora Infrastructure team.
What is Copr commonly used for?
Common uses include hosting third-party RPM repositories, continuous integration builds, nightly or beta package builds, and mass rebuild testing.