Brandwave

Codewars vs Project Euler:Which is more popular?

In September 2026, Codewars had more branded searches than Project Euler among coding challenge brands worldwide. Codewars had about 90,500 branded searches, while Project Euler had 27,100. Codewars made up 1.8% of all coding challenge brand searches we track, and Project Euler accounted for 0.55%. When we asked ChatGPT and Google AI Overviews about coding challenge brands, Codewars appeared in three of the five answers and Project Euler in two. Codewars was mentioned before Project Euler in every answer that named either.

Among coding challenge brands worldwide in September 2026

Who do people search for more?

Codewars, about 3 searches for every 1 for Project Euler

Codewars 90.5K searchesProject Euler 27.1K searches

Who does AI mention more?

Codewars, mentioned in 3 of 5 answers, Project Euler in 2

Codewars in 3 of 5Project Euler in 2 of 5

Who does AI recommend more?

Codewars, named ahead of Project Euler in 3 of 3 answers

Codewars first in 3Project Euler never first

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Top coding challenge brands in ChatGPT and Google AI Overviews

In three ChatGPT questions and two Google AI Overviews, Codewars was mentioned in three out of five: in two of the three ChatGPT answers and in one of the two Google AI Overviews. Project Euler was mentioned in two out of five: in one of the three ChatGPT answers and in one of the two Google AI Overviews. Codewars was listed before Project Euler in every answer that named either.

Most recommended by AI

Brands get a higher ranking if they are mentioned earlier in the answers.

  1. HackerRank1st
  2. LeetCode2nd
  3. CodeSignal3rd
  4. Codewars4th
  5. Codeforces5th
  6. Exercism6th
  7. CoderPad7th
  8. HackerEarth8th
  9. Codility9th
  10. Project Euler10th
  11. +1 more

Mentioned by AI

Each dot is one answer, filled in when that answer mentions the brand.

  • HackerRank5 of 5Named in 3 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • LeetCode4 of 5Named in 2 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • Codeforces3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Codewars3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Exercism3 of 5Named in 2 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • CodeSignal3 of 5Named in 1 of 3 ChatGPT answersNamed in 2 of 2 Google answers
  • HackerEarth2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • CoderPad2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Project Euler2 of 5Named in 1 of 3 ChatGPT answersNamed in 1 of 2 Google answers
  • Codility1 of 5Named in 1 of 3 ChatGPT answersNamed in 0 of 2 Google answers

+1 more

See every answer about coding challenge brands

5 answers

Not named in any answer:

Brands are shown in the order each answer named them. The survey took place in the United States on October 20, 2026.

Is Codewars or Project Euler more popular in search?

This chart shows how often people search Google for Codewars and Project Euler by name. Each line represents a brand's share of searches for all 11 coding challenge brands we track, month by month, from English-language searches worldwide.

Codewars and Project Euler among coding challenge brands worldwide, by month

Share of searches by month for Codewars, Project Euler. The figures are in the table below the chart.

View monthly share of searches table
MonthLeetCodeHackerRankCodeforcesCodewarsExercismHackerEarthHireVueCoderPadCodeSignalProject EulerCodility
Oct 202555.1%20.2%13.5%3.3%1.8%1.2%1.2%1%1.2%0.81%0.55%
Nov 202559.4%17.8%11.9%3.6%1.6%1.3%1.1%0.88%1.1%0.72%0.59%
Dec 202560.1%18%12.1%2.9%1.3%1.6%0.89%0.73%1.1%0.73%0.49%
Jan 202662.7%15.4%12.6%3.1%1.4%1.1%0.93%0.76%0.93%0.62%0.51%
Feb 202662.6%15.4%12.6%2.5%1.7%1.7%0.92%0.76%0.92%0.62%0.41%
Mar 202663.2%15.5%10.4%2.5%2.1%2.1%1.1%0.93%0.93%0.63%0.51%
Apr 202659.7%17.9%12%2.9%2%1.6%1.1%0.88%0.88%0.59%0.48%
May 202665.6%13.2%10.8%3.2%1.8%1.4%0.97%0.97%0.97%0.65%0.43%
Jun 202668.5%13.7%9.2%2.3%1.8%1.2%0.83%0.83%0.68%0.55%0.37%
Jul 202667.6%16.6%9.1%1.8%1.5%0.82%0.67%0.67%0.55%0.45%0.3%
Aug 202667.3%16.5%9%1.8%1.5%0.99%0.81%0.66%0.66%0.45%0.3%
Sep 202667.5%16.6%9.1%1.8%1.2%0.82%0.82%0.67%0.67%0.55%0.3%

How has the Codewars and Project Euler comparison changed over the last 12 months?

3 findings

How did search popularity change for coding challenge brands worldwide in September 2026?

2 changes

  1. Estimated monthly branded searches for Codewars worldwide fell 33% over 12 measured months, from 135K to 90.5K in September 2026.

  2. Estimated monthly branded searches for Project Euler worldwide fell 18.1% over 12 measured months, from 33.1K to 27.1K in September 2026.

How are branded searches counted?

2 search terms

Brandwave collects information about searches that people make online using Codewars’ and Project Euler’s names. When viewed over time, estimated search volumes for these branded terms can be used to understand whether interest in the brands is growing, holding steady, or fading.

Codewars

1 branded search term

  • codewars

Project Euler

1 branded search term

  • project euler

How the Brand Demand Index is measured

Other head-to-heads among coding challenge brands

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