
LeetCode
Codechef
AlgoExpert.io
Project Euler
Interview Cake
Coderbyte
interviewing.io
Programming competitions and contests, programming community.

Logseq
Obsidian
Zim Wiki
Nuclino
Trilium Notes
TiddlyWiki
Roam Research
Personal knowledge management and sharing on VSCode & GitHub

Which is more popular?
Based on our record, CodeForces should be more popular than Foam. It has been mentioned 82 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | codeforces.com | foambubble.github.io |
| Pricing | — | |
| Company | — | Startup from the United States |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
Possible disadvantages
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
How to Start Competitive Programming on Codeforces? Virtual Contest? Div1? Div2? Div3? Rating Logic
More videos
These panels DESTROYED my STUDIO....REVERB? - ArrowZoom Foam Review
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using CodeForces and Foam. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Codeforces is a competitive programming platform that hosts coding contests and provides a platform for programmers to showcase their skills. It offers a wide range of programming challenges and problem-solving...
CodeForces is a collaborative platform where coders can participate in “rounds” where a time limit is set and points are distributed to the participants. CodeForces also has contests, problem sets as well as groups...
We have no reviews of Foam yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


Your preparation should not be random. Platforms like LeetCode, Codeforces, and GeeksforGeeks are tools—but what matters is how you use them. - Source: dev.to / 7 months ago
Most people who do competitive programming have moved to: . - Source: Hacker News / 10 months ago
At first, the problems on platforms like Codeforces felt overwhelming. But after a few rounds, I realized something important:. - Source: dev.to / about 1 year ago
Choose a local Markdown tool like Obsidian, Logseq, Foam, or Tolaria to store all your knowledge as plain .md files you own and control. - Source: dev.to / 6 months ago
I've been using foam instead of obsidian for my personal knowledge base. It works rather well. And it's completely free and ultimately just markdown. While I might wish it was djot, I don't wish hard enough to make that so myself... - Source: Hacker News / about 2 years ago
I gave up on Obsidian and just use Foam (https://foambubble.github.io/foam/) and/or vimwiki. I just can’t get into overwrought, arbitrarily designed organization schemes or proprietary apps (Foam-managed content is just plain Markdown,... - Source: Hacker News / over 2 years ago
When comparing CodeForces and Foam, you can also consider the following products.

Practice and level up your development skills and prepare for technical interviews.
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Logseq is a local-first, non-linear, outliner notebook for organizing and sharing your personal knowledge base.
Compare Logseq to CodeForces or Foam:

CodeChef is a not-for-profit educational initiative by Directi, an Indian software company. It is a global programming community that fosters learning and friendly competition, built on top of the world’s largest competitive programming platform.
Compare Codechef to CodeForces or Foam:

A second brain, for you, forever. Obsidian is a powerful knowledge base that works on top of a local folder of plain text Markdown files.
Compare Obsidian to CodeForces or Foam:


Zim is a graphical text editor used to maintain a collection of wiki pages. Each page can contain links to other pages, simple formatting and images.
Compare Zim Wiki to CodeForces or Foam: