reddit-archive/reddit

Analysis updated 2026-06-24

★ 16,943PythonAudience · developerComplexity · 4/5LicenseSetup · hard

Mindmap

mindmap
  root((reddit archive))
    Inputs
      Web requests
      Vote and comment actions
    Outputs
      Rendered pages
      JSON API responses
    Use Cases
      Code archaeology
      Study large Python web app
      Run local old Reddit
    Tech Stack
      Python
      JavaScript
      Pylons
      Cassandra
      PostgreSQL
    Status
      Frozen no PRs

mindmap root((reddit archive)) Inputs Web requests Vote and comment actions Outputs Rendered pages JSON API responses Use Cases Code archaeology Study large Python web app Run local old Reddit Tech Stack Python JavaScript Pylons Cassandra PostgreSQL Status Frozen no PRs

Click or tap to explore — scroll the page freely

What do people build with it?

USE CASE 1

Read the source as a case study of an early Python web platform at scale.

USE CASE 2

Stand up a local instance of historical Reddit on a VM for educational purposes.

USE CASE 3

Mine the codebase for ideas on voting, ranking, and comment tree implementations.

USE CASE 4

Compare the archived architecture against modern Python web stacks in a writeup.

What is it built with?

PythonJavaScriptPylonsCassandraPostgreSQL

How does it compare?

	reddit-archive/reddit	camel-ai/camel	aws/aws-cli
Stars	16,943	16,945	16,957
Language	Python	Python	Python
Setup difficulty	hard	moderate	moderate
Complexity	4/5	3/5	2/5
Audience	developer	researcher	ops devops

Figures from each repo's GitHub metadata at analysis time.

How do you get it running?

Difficulty · hard Time to first run · 1day+

Frozen codebase with stale dependencies, expect to fight Python 2 era libraries, Cassandra, and the CPAL attribution requirement.

Most of the code is under the Common Public Attribution License (CPAL), a copyleft license that requires source disclosure and visible attribution to Reddit in any deployed copy.

In plain English

This repository contains historical source code from reddit.com, the social news and discussion platform, written in Python and JavaScript. It is an archived snapshot of the codebase from an earlier period in Reddit's history and is no longer actively maintained or updated. The repository does not accept new issues or pull requests. The code gives a rare look at how a large, real-world web platform was built during an earlier era of web development. It includes the backend server code and related components that powered the reddit.com site. For anyone interested in studying how Reddit worked under the hood, or in historical examples of Python-based web application architecture at scale, this is a primary source. You would look at this repository out of historical or educational interest, to understand how Reddit's codebase was structured, or to set up your own local instance of an older version of Reddit using the included install guide. It is not suitable for building on top of or deploying in any modern context, as it is frozen and unsupported.

Copy-paste prompts

Prompt 1

Walk me through standing up the archived reddit codebase locally using the included install guide on a Linux VM.

Prompt 2

Help me find where the comment tree sorting and best ranking algorithm live in the reddit-archive source.

Prompt 3

Show me how the old reddit code shards data between PostgreSQL and Cassandra.

Prompt 4

Help me extract just the voting and karma logic from reddit-archive for a study project.

Prompt 5

Explain the CPAL license obligations that apply if I try to host a copy of this code publicly.

Frequently asked questions

What is reddit?

Archived historical source code of reddit.com, frozen and unmaintained, kept for study of an early large-scale Python web platform.

What language is reddit written in?

Mainly Python. The stack also includes Python, JavaScript, Pylons.

What license does reddit use?

Most of the code is under the Common Public Attribution License (CPAL), a copyleft license that requires source disclosure and visible attribution to Reddit in any deployed copy.

How hard is reddit to set up?

Setup difficulty is rated hard, with roughly 1day+ to a first successful run.

Who is reddit for?

Mainly developer.

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