Lore — open source version control built for scale
Lore | Next-Generation Open Source Version Control - Lore
Lore: next-generation [open source version control](https://lore.org/# "#")
Maintained by Epic Games, Lore is designed for unprecedented scalability of both data and teams. It’s optimized for projects—including games and entertainment—that combine code with large binary assets, and caters for the needs of developers and artists alike.
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Get started with Lore
Find us on GitHub
Access and contribute to Lore on the Epic Games GitHub.
Read the docs
Delve into Lore’s ethos and architecture.
Join the conversatio n
Chat with us and our community on Discord.
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Overview
Easy setup, on-demand scalability
Get started in local mode in minutes. Then, scale up as far and as fast as you need.
Fast and efficient processes
Scale without slowdowns, thanks to shared, reusable data and as-needed downloads.
Free branching
Quickly and easily create, manage, and sync branches to freely experiment, iterate, and release.
History you can trust
Confidently track and manage revisions with Lore's verifiable tamper-evident source of truth.
Intuitive interface
Enjoy complete one-to-one access to the full Lore functionality via the CLI.
Full-surface API
Extend, customize, and integrate Lore via C/C++, C#, Rust, Go, Python, or JavaScript.
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Lore’s architecture
Lore is a centralized, content-addressed version control system that represents repository state as Merkle trees and an immutable revision chain, optimized for binary-first storage, deduplication, and sparse/on-demand data hydration at scale.
Read the docsView system design doc
Content-addressed storage
Repository data is stored and referenced by content hash in a Merkle tree, enabling fast comparisons, integrity checks, and reuse across history and branches.
Immutable revision chain
A revision's hash signature is derived from its revision state, including parent revision hashes and contained data hashes, forming an immutable chain with cryptographic integrity.
Chunked storage for large files
Files are stored as reusable chunks with indexed lookup, reducing duplication and enabling efficient updates and transfer for large binary assets.
On-demand hydration and sparse workspaces
Workspaces can stay lightweight by fetching file data only when needed, so you don't have to download everything up front.
Centralized service with caching
A service-backed architecture uses caching in front of durable storage to scale throughput for large teams and repositories.
Lightweight branches and fast switching
Branches are lightweight mutable references, so creating and switching branches is low-overhead without duplication of underlying data.
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Lore’s repositories
Explore the full collection of Lore repositories on the Epic Games GitHub.
[Fully open source](https://lore.org/# "#")
At Epic, we believe a truly open ecosystem won’t be built by any one company, but collectively and collaboratively using open standards. That’s why Lore is fully open source and released under an MIT license.
Let’s build the version control system of the future in the open, learning from each other’s needs and ideas from the start. Come join us!
Frequently asked questions
What is Lore?
Lore is a next-generation open source version control system maintained by Epic Games. Designed for unprecedented scalability—both in terms of data size and the size and distribution of teams and repositories—it is especially optimized for projects that combine code with large binary assets, such as those found in the games and entertainment industries. Easy to set up, scale, and maintain, Lore provides the foundations for teams to build fast, intuitive, and practical collaborative workflows for developers and artists alike.