Codility Reviews in September 2026: User Ratings, Pros & Cons

"Test for a startup"

What do you like best about Codility? What I like best is the user experience and the variety of tests we can do on Codility. The algorithm we make is analyzed in every aspect and the report after the test is quite complete. More than the correctness of an algorithm, we have its performance in a professional context. This site is very serious. The states are complicated enough to think a lot.

"Absolutely brilliant learning/testing site"

What do you like best about Codility? The IDE provided for the tests is brilliant, really easy to use in intuitive to new users. What do you dislike about Codility?

"Very coherent"

What do you like best about Codility? The questions while being lengthy are quite clear for any person to follow and provide adequate information to solve problems.

"Prepare for The Worst: The Black Box Testing With Codility"

What do you like best about Codility? Codility provides challenging problems with reasonable amount of times. Its not suppress us to solve problem fast as possible, but its courage us to making custom test in order to do self validation.

"An indispensable tool for technical applicant filtering and classification."

What do you like best about Codility? The ease with which you can create a panel of tests to model a given technical role, and then look in detail at not just how a candidate handled a task, but also the steps they took to get to their solution.

"Easy to use, accurate results great interface"

What do you like best about Codility? It is quite easy to use. Tasks are being sent within seconds. Very comfortable interface. Great in spotting cheating cases. What do you dislike about Codility?

The experience is great until you find…

The experience is great until you find out the score is not reliable: I used a built-in function in Java that did EXACTLY what was required in the description (that I read thoroughly). Codility gave it a score of 50% for correctness. Quite frustrating to be crossed off the candidate list just because of that.

"Solid tool for testing interview candidates."

What do you like best about Codility? Coding tests can be replayed so you can review the thought process that went into how the solution was found. This can be useful as well to detect large copy/paste events that might indicate copying a solution from an online source

"I have been interviewed usng them and also take on their coding chalenges"

What do you like best about Codility? Easy to use Interface and challenging questions. Also, you get to learn using their materials which I found a bit useful What do you dislike about Codility?

"Easy, very complete, and fully integrated with Smartrecruiters "

What do you like best about Codility? ATS integration Tech stack covered