
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.

GridMaker.org
GridMaker.pro
OnlineGridMaker
IG Grid Maker
Art Grid Maker
Canva
Grid Maker Online
The ultimate free grid maker tool. Overlay grids on reference photos, crop to paper sizes, and apply sketch filters. Private, local, and ad-free.

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 | gridmakers.app |
| Pricing | ||
| Platforms | — | |
| Company | — | 2025 |
| 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....
GridMakers is a free, browser-based tool that brings the traditional grid drawing method into the modern era. While many existing tools rely on outdated web technologies, GridMakers offers a fast, responsive, and seamless experience without the need for downloads or account registration. Key...
What each product offers, as listed by its team.


Possible disadvantages
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 GridMakers.app 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 GridMakers.app.
GridMakers.app's answer:
GridMakers was born to solve the frustrations of using outdated grid tools. It packs all essential features—like customizable line weights, colors, and opacity—into a modern, lightning-fast web interface. Unlike legacy tools, it's fully responsive (mobile-friendly), requires no account, and is 100% ad-free, making it the most efficient way for artists to prepare their references in seconds.
GridMakers.app's answer:
GridMakers stands out by balancing extreme simplicity with mission-critical features that competitors overlook. While other tools only offer basic lines, GridMakers provides 4 specialized Image Filters designed specifically to help artists see values and structures more clearly. Furthermore, our intuitive 'Paper Handling' settings allow users to preview and adjust how the grid will translate to physical media, ensuring a seamless transition from screen to sketchpad. It’s built by understanding that artists need more than just a grid—they need a better way to visualize their reference.
GridMakers.app's answer:
GridMakers is purposefully designed for three distinct groups of creators, with pre-set configurations optimized for their specific workflows:
Traditional Fine Artists: Those working with oil, charcoal, or graphite who need precise scaling from digital references to physical canvases or paper.
Muralists & Large-Scale Creators: Artists who require specialized grid ratios to manage proportions on a massive scale without losing detail.
Art Educators & Students: Beginners who use the 'Grid Method' to learn about proportions, values, and spatial relationships. By offering pre-set parameters for different media and sizes, GridMakers eliminates the guesswork, allowing artists to focus on their craft rather than technical setup.
GridMakers.app's answer:
GridMakers is built with a focus on high performance and zero-latency image processing. The primary technologies include:
HTML5 & CSS3: Leveraging modern web standards to ensure a fully responsive UI that works seamlessly across desktops, tablets, and mobile devices.
Canvas API: Using advanced hardware-accelerated rendering for real-time grid adjustments and high-resolution image filtering without server-side processing.
Modern JavaScript (ES6+): For efficient, lightweight client-side logic that ensures the tool remains fast and privacy-focused (images are processed locally in the browser).
Progressive Web App (PWA) Principles: Designed to be an 'instant-on' tool that requires no installation or account creation, providing a native-app-like experience in any browser.
Share your experience with using Codility and GridMakers.app. 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 GridMakers.app 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 GridMakers.app since Dec 2025.
When comparing Codility and GridMakers.app, 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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Split any image into Instagram posts. Create stunning grid effects for your feed. Fast, free, and easy to use online tool.
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CodeSignal is the leading assessment platform for technical hiring.
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Create accurate drawing grids with our free grid maker online. Customize lines, scale photos, and transfer images with better proportions. No signup required.
Compare GridMaker.pro to Codility or GridMakers.app:


Add a precise grid overlay to any image for drawing and sketching. Customize rows, columns, line color and thickness. 100% free, no signup, no upload.
Compare OnlineGridMaker to Codility or GridMakers.app: