
Brilliant.org
EloMath
Khan Academy
Numberthon
Project Euler
LeetCode
mathigon
Practice olympiad-style math problems and compete against other users.

Code Effects is the fastest and most intuitive .NET business rules engine trusted by government entities and Fortune 500 corporations all over the world

Website, pricing, platforms and company facts side by side.
|
|
|
|
|---|---|---|
| Website | calcora.net | codeeffects.com |
| Pricing | ||
| Platforms | — | |
| Company | Startup from Switzerland · 1 - 9 employees · 2026 | 2009 |
| Listed in |
In their own words, as submitted to SaaSHub.


Calcora is a free platform for practicing math problems of all difficulty levels. Solve problems, maintain your streak, and compete with friends on the leaderboard. The Rules No Calculator. Solve every problem by hand. Mental math and working on paper are part of the challenge. No AI Assistance....
Code Effects Software is the developer of state-of-the-art business rules engine that combines an incredible performance of rule evaluation with revolutionary web interface, allowing the end-users to author and manage their corporate business rules with no knowledge of programming languages or IT...
What each product offers, as listed by its team.


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
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Calcora.net and Code Effects. For example, how are they different and which one is better?
When comparing Calcora.net and Code Effects, you can also consider the following products.

Brilliant - Understand concepts and build your problem solving skills with thousands of free problems and examples in math, science, and engineering.
Compare Brilliant.org to Calcora.net or Code Effects:

Improve math skills with ranked practice, Elo-style ratings, topic lessons, timed challenges, progress stats, rewards, and a global leaderboard.
Compare EloMath to Calcora.net or Code Effects:

Khan Academy offers online tools to help students learn about a variety of important school subjects. Tools include videos, practice exercises, and materials for instructors. Read more about Khan Academy.
Compare Khan Academy to Calcora.net or Code Effects:

Complete and climb the global math leaderboard on Numberthon! Key features include ranked math matches, puzzles, and ELO style rankings.
Compare Numberthon to Calcora.net or Code Effects:

Project Euler is a series of challenging mathematical/computer programming problems that will...
Compare Project Euler to Calcora.net or Code Effects:

Practice and level up your development skills and prepare for technical interviews.
Compare LeetCode to Calcora.net or Code Effects: