
HackerRank
CodeSignal
iMocha
HackerEarth
TestGorilla
DevSkiller
mettl
Codility provides a SaaS platform with advanced validation, security and protection features to evaluate the skills of software engineers.

Microsoft Office Excel
DataWrapper
Flourish
ChartPixel
ChartStud
MakeCharts
Create stunning data visualizations in minutes. Upload your data (CSV/Excel/JSON and many more), clean messy data automatically, and generate publication-quality charts without coding. 12 chart types, smart data cleaning, instant results.

Which is more popular?
Based on our record, Codility seems to be more popular. It has been mentioned 2 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | codility.com | cleanchart.app |
| Pricing | ||
| Platforms | — | |
| Company | — | Startup from Switzerland · 1 - 9 employees · 2026 |
| Listed in |
In their own words, as submitted to SaaSHub.


The Codility platform includes: CodeCheck - Design role-specific remote skills assessments to screen your technical candidates before moving them to the interview stage. CodeLive - Host technical remote or onsite interviews via our shared editor using a range of templates and whiteboards....
CleanChart.app is a no-code data visualization tool that helps you turn your raw data into professional, publication-ready charts in minutes — without Excel, coding, or design skills. You simply upload your data, let the app automatically clean and format the data, choose a chart type, and export...
What each product offers, as listed by its team.


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


No analysis of Codility yet.
Overall verdict
Why this product is good
Recommended for
Walkthroughs and reviews on video.
An Introduction to Codility: The Tech Hiring Platform for Engineering Teams
No CleanChart videos yet. You could help us improve this page by suggesting one.
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing Codility and CleanChart.
CleanChart's answer:
Automatic Data Cleaning Built In – Unlike most chart makers that assume your data is already neat, CleanChart detects and fixes common issues like missing values, duplicates, and inconsistent formats before you generate a chart. This means you spend less time prepping and more time visualizing.
True No-Code Experience – You don’t need Excel expertise, scripting skills, or design knowledge to produce professional charts. With just file upload and a few clicks, you get clean, ready-to-use visualizations.
Fastest Path from Raw Data to Chart – CleanChart’s workflow is optimized for speed: upload, clean, select, export — often within minutes. Compared to tools like Google Sheets or coding in Python, it’s one of the quickest ways to go from messy data to visual output.
Professional-Quality Defaults – Charts are designed with excellent readability and accessibility by default — with legible labels and color palettes meant to communicate insight clearly without manual tweaking.
Privacy-Focused & Simple Pricing – Data processing happens in the browser (keeping your data private), and pricing is token-based rather than subscription locked — making it more accessible for occasional users and smaller budgets.
Broad Use Cases Beyond Analysts – While many visualization tools are built for analysts or require specialized skills, CleanChart targets everyday users — students, professionals, and anyone who needs clear charts without the BI complexity.
CleanChart's answer:
No technical skills required – CleanChart lets you go from raw data to polished chart in minutes without Excel wizards, coding, or BI expertise.
Automatic data cleaning – Upload messy CSV/Excel files and the app detects and fixes issues like missing values and formatting errors for you.
Professional-grade results fast – Designed for readability and clarity, charts are publication-ready with accessible defaults and export options (PNG/SVG).
Affordable, transparent pricing – Pay-per-chart or low-cost options instead of expensive subscriptions typical of many analytics platforms.
Great for non-enterprises – Ideal for students, researchers, and business users who need insight visualization without heavy BI tools.
CleanChart's answer:
The primary audience includes non-technical users who need to create clear and professional charts quickly — such as students doing assignments or theses, business professionals preparing reports or presentations, and anyone who wants insight from data without wrestling with spreadsheets or coding.
CleanChart's answer:
CleanChart was built to solve a common pain point: turning messy, real-world data into visual insights faster and with less frustration than traditional tools like Excel or programming languages. It emphasizes simplicity — upload a file, clean the data automatically, pick a chart type, and export results — with privacy and ease-of-use at its core.
CleanChart's answer:
CleanChart is primarily a Python-based application, with JavaScript powering the web interface, and Cython/C components used for performance optimization.
CleanChart's answer:
Mostly people who want to clean their data quickly and easily, and then visualize it. It is designed for people with no coding skills or for those who don’t know how to do it using common software such as Excel.
Share your experience with using Codility and CleanChart. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Codility is a platform that helps companies assess the coding skills of developers. They offer a range of online coding tests and assessments that enable employers to evaluate candidates' technical abilities.
We have no reviews of CleanChart yet. Be the first one to post
Recommendations tracked on public social media and blogs since March 2021.


- Technical skills: have they got the walk to match the talk? Programming languages on a resume mean little if candidates are unable to demonstrate their hard coding skills. You can test these skills with technical skill tests, such as... - Source: dev.to / over 2 years ago
Codility : Verify and improve coding skills. - Source: dev.to / over 5 years ago
Tracking CleanChart since Feb 2026.
When comparing Codility and CleanChart, you can also consider the following products.

HackerRank is a platform that allows companies to conduct interviews remotely to hire developers and for technical assessment purposes.
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Microsoft Office Excel is a commercial spreadsheet application.
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CodeSignal is the leading assessment platform for technical hiring.
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An open source tool helping anyone to create simple, correct and embeddable charts in minutes.
Compare DataWrapper to Codility or CleanChart:

