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Codewars VS WhatNotSell

Compare Codewars VS WhatNotSell and see what are their differences

Codewars

Achieve code mastery through challenge.

Rating
0 reviews
Pricing
Open source
Alternatives Is it good?
WhatNotSell

The fact-checker for online deals. WhatNotSell verifies whether a discount is actually real, scores every deal 0–100, and shows the average discount for any category — so you never overpay.

Rating
0 reviews
Pricing
Freemium Free trial
Alternatives Is it good?
CallFlow.dev
AI role-play training for sales and call center teams: 700+ realistic scenarios, six caller temperaments, instant five-dimension scoring and coaching. Cut ramp time up to 40% without practicing on real customers. sponsored
Note: These products don't have any matching categories. If you think this is a mistake, please edit the details of one of the products and suggest appropriate categories.

Which is more popular?

Based on our record, Codewars seems to be more popular. It has been mentioned 160 times since March 2021.

social mentions
160 vs 0
Online Learning popularity
100% vs 0%
alternatives listed
240+ vs 15

Base details

Website, pricing, platforms and company facts side by side.

Codewars
WhatNotSell
Website codewars.com whatnotsell.com
Pricing
Open source
Freemium Free trial Official pricing
Platforms —
Web
Company — Startup from the United States · 2026
Listed in
Online Learning Online Courses Online Education Education +1
Deals Shopping Online Shopping Discounts Deal Aggregator AI +3

About Codewars and WhatNotSell

In their own words, as submitted to SaaSHub.

Codewars
WhatNotSell

No description of Codewars yet.

WhatNotSell is an AI-powered shopping intelligence platform that helps consumers discover, compare, and evaluate the best deals across trusted retailers. Every deal is verified against its real original price and scored 0–100 based on discount depth, merchant trust, price history, and community...

Read more about WhatNotSell

Features and specs

What each product offers, as listed by its team.

Codewars 5 features
WhatNotSell 7 features
  • Wide Range of Challenges
    Codewars offers a broad spectrum of coding challenges ranging from easy to very difficult, catering to all skill levels.
  • User Engagement
    The platform encourages community interaction through comments, user-submitted challenges, and solutions, fostering a collaborative learning environment.
  • Multiple Languages
    Codewars supports a variety of programming languages, allowing users to practice and improve skills in their language of choice.
  • Gamification
    The use of a ranking system, badges, and honor points adds a gamified layer to the learning process, making it more engaging and motivating.
  • Detailed Solutions
    After solving a challenge, users can view multiple solutions from others, offering a range of approaches and insights into problem-solving.

Possible disadvantages

  • Steep Learning Curve
    Beginners might find some challenges too difficult at first, which can be discouraging without proper guidance or learning resources.
  • Quality Variability
    The quality of user-submitted challenges can be inconsistent, meaning not all katas are equally useful or well-designed.
  • Limited In-Depth Learning
    While great for practice, Codewars does not provide comprehensive tutorials or in-depth explanations, which are often needed for mastering complex concepts.
  • Time Consumption
    The addictive nature of the platform can lead to spending excessive time on solving challenges, potentially detracting from other learning activities.
  • AI Deal Scoring
    Every deal scored 0–100 based on discount depth, price, retailer trust, and freshness
  • 9,500+ Live Deals
    Aggregated across 36 categories from eBay, Awin, CJ, and 40+ retailers, updated daily
  • 100 Expert Buying Guides
    In-depth product guides with live deal tracking for every major category
  • Smart Price Alerts
    Describe what you want in plain English and get notified when a matching deal appears
  • Community Deal Voting
    Upvote/downvote deals — community signal feeds back into AI scores
  • Saved Deals
    Bookmark deals and track them from your dashboard
  • Personalized Feeds
    Pick your categories and your feed adapts to what you care about

Analysis

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

Codewars
WhatNotSell

Overall verdict

  • Yes, Codewars is a valuable resource for programmers looking to enhance their problem-solving skills and gain proficiency in various programming languages.

Why this product is good

  • Codewars is considered good due to its extensive library of coding challenges (kata) that cater to multiple programming languages. It promotes learning through practice, allowing users to improve their coding skills by solving increasingly complex problems. The platform also encourages community engagement by allowing users to create their own challenges and interact with solutions from other programmers.

Recommended for

    Codewars is recommended for beginner to advanced programmers who enjoy learning through practice and are interested in improving their algorithmic thinking and coding skills in a gamified environment. It is particularly beneficial for those preparing for coding interviews or seeking to reinforce their programming knowledge in a fun and interactive way.

Overall verdict

  • I don't have verified, reliable information about a product or service called 'WhatNotSell' (whatnotsell.com). I cannot confirm its legitimacy, quality, or reputation, so I'm unable to provide an accurate assessment.

Why this product is good

  • No verified data available on this specific domain or service
  • Unable to confirm business legitimacy, reviews, or track record
  • Providing a verdict without factual basis could be misleading or inaccurate
  • Recommend independently researching the site through domain lookup tools, review platforms, and consumer protection resources before engaging

Recommended for

  • Not applicable due to insufficient verified information
  • Users should conduct their own due diligence including checking site registration date, reading third-party reviews, verifying business contact information, and checking for secure payment practices before making any purchase decisions

Videos

Walkthroughs and reviews on video.

Codewars 2 videos + Add
WhatNotSell 0 videos + Add

Codewars Review & Tips

More videos

  • - Practising Programming | Codewars Intro

No WhatNotSell videos yet. You could help us improve this page by suggesting one.

Category popularity

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

Score bands 0–20 21–40 41–50 51–60 61–100
Codewars
WhatNotSell
100% 100%
Online Learning
0% 0%
0% 0%
Deal Aggregator
100% 100%
100% 100%
Online Education
0% 0%
0% 0%
Online Shopping
100% 100%

Questions & Answers

As answered by people managing Codewars and WhatNotSell.

How would you describe the primary audience of your product?

WhatNotSell's answer:

Deal hunters and smart shoppers who are tired of fake discounts and want a single trusted place to find genuinely good deals. Secondary: content creators and businesses who need structured deal data via our API plans.

What makes your product unique?

WhatNotSell's answer:

Every deal gets an AI score from 0–100 based on discount depth, price, retailer trust, and community votes — so instead of scrolling through hundreds of listings, you instantly see which deals are genuinely worth it. We combine 9,500+ deals across 36 categories with 100 expert buying guides, so you can research what to buy and find the best price in one place.

Why should a person choose your product over its competitors?

WhatNotSell's answer:

Traditional deal sites either rely on community voting alone (slow to surface deals) or pure editorial curation (limited volume). WhatNotSell uses AI scoring to evaluate every deal automatically at scale, filtering out fake discounts and inflated "original prices" that plague deal aggregators. Plus, plain-English price alerts and a free forever plan — no extension installs, no data selling.

What's the story behind your product?

WhatNotSell's answer:

WhatNotSell started from a simple frustration: deal sites are full of noise — inflated original prices, expired links, and "deals" that aren't deals. We built an AI scoring engine that evaluates every deal objectively, then layered in expert buying guides and price alerts. The goal: tell you what's actually worth buying, and what's not — hence the name.

Which are the primary technologies used for building your product?

WhatNotSell's answer:

Next.js, TypeScript, Tailwind CSS, Supabase (PostgreSQL), and Vercel, with AI-powered deal scoring and categorization.

Who are some of the biggest customers of your product?

WhatNotSell's answer:

WhatNotSell is a free consumer platform, so our "customers" are everyday shoppers rather than enterprise clients. We're an early-stage product growing our user base, focused on helping individual shoppers verify deals and avoid overpaying.

User comments

Share your experience with using Codewars and WhatNotSell. For example, how are they different and which one is better?

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Reviews and articles

External articles and on-site reviews we used to compare the two products.

Codewars no reviews yet
WhatNotSell no reviews yet
  • LeetCode Alternatives: Top platforms for coding practice
    formation.dev · Apr 2024

    Edabit offers a learning experience similar to learning a new language, focusing on smaller and more frequent exercises that build proficiency over time. Like Codewars, Edabit provides many challenges that increase in...

  • Discover the Top Leetcode Alternatives
    codenquest.com · Jan 2024

    In conclusion, while Leetcode remains a valuable resource for coders, the platforms listed above offer varied approaches to learning and improving coding skills. Whether you're drawn to the gamified learning...

  • 15 Best LeetCode Alternatives 2023
    rigorousthemes.com · Apr 2023

    This LeetCode alternative has excellent features for anyone looking to sharpen their coding skills. Codewars uses kata, which are small coding exercises that are community developed to help you master your language of...

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We have no reviews of WhatNotSell yet. Be the first one to post

Social recommendations and mentions

Recommendations tracked on public social media and blogs since March 2021.

Codewars 160 mentions
WhatNotSell 0 mentions
  • Of recursion and backtracking
    Recently, I was working on a coding kata on codewars.com. Early on, I started thinking that a potential solution might utilize recursion, a concept that involves a function calling itself. However, I quickly realized that my grasp of... - Source: dev.to / almost 3 years ago
  • 4th year, about to fail an entire semester's worth of classes.
    Get more involved. Look into internships and junior SWE positions to get a sample of what you'd be applying for once you graduate. Solve coding challenges, start working on a portfolio of your personal works. I recommend codewars.com for... Source: almost 3 years ago
  • Beginner with C++ looking for direction
    I'd recommend to play around with some basic coding challenges on leetcode.com or codewars.com. If the course prepared you well you won't find this useful, but playing around with them will make sure that you are comfortable with basics... Source: about 3 years ago

View more

Tracking WhatNotSell since Jun 2026.

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