Codility vs CSSBattle
Codility
codility.comCSSBattle
cssbattle.devSide by side
| Figure | Codility | CSSBattle |
|---|---|---|
| Price from | $100/mo | $4.90/mo |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| API | Yes | — |
| Plans published | 3 | 5 |
| Spec score · Coding Challenge Platforms | 9.0 (#3) | 8.1 (#10) |
| Security | Codility states its information security program is ISO 27001 certified and covered by a SOC 2 Type II report; data is encrypted in transit and at rest. | The privacy page says the website works strictly over HTTPS and submissions are inaccessible to other players except on Open Targets or Daily Targets. |
| Support | The help center offers searchable articles, tutorials, integration guidance, security administration and ticket support. | The site lists [email protected] and directs users with questions to its community forum or social account. |
| What it does | Codility assesses job candidates and employees through technical and AI-skills work simulations. | CSSBattle is an online game where players write HTML and CSS to recreate target images using as few characters as possible. |
Plans
CSSBattle
- CSSBattle FreeFree
- CSSBattle PLUS Monthly$4.90 a month
- CSS Learn Basic$13, paid once
- CSSBattle PLUS Yearly$59 a year
- CSS Learn Intermediate$100, paid once
In their own words
Codility
Codility offers Screen, Interview and Skills Intelligence for engineering hiring, technical interviews and workforce skills mapping. Screen provides online technical assessments with objective scores and detailed breakdowns across a library of more than 1,300 tasks. Interview supports live technical interviews in a VS Code environment, including whiteboarding, pair programming, live code execution, recordings and structured evaluation. Skills Intelligence maps engineering capabilities, identifies gaps and supports project staffing and development planning. Teams can configure AI use for each assessment, with tasks on prompt engineering, evaluating AI-generated code and working with AI tools. Codility connects with recruiting and HR systems including Greenhouse, Lever, Ashby, Workday, SAP and SmartRecruiters. Its public API supports invitations, result retrieval, completion alerts and custom reporting, with a limit of 500 requests per user per hour. Codility says its security program is ISO 27001 certified and covered by a SOC 2 Type II report; it also states that data is encrypted in transit and at rest. It states GDPR and CCPA compliance and WCAG 2.2 AA accessibility. The company was founded in 2009 and is headquartered in London.
CSSBattle
CSSBattle is a web game for practicing HTML and CSS by rebuilding target images with the shortest possible code. Scores reflect both visual similarity and character count. You can open targets and write code without an account, but logging in is required to submit and receive a score. A new Daily Target appears at 00:00 UTC; these daily challenges have no leaderboards. Battles use separate targets and leaderboards, while private Versus battles support one-on-one challenges with friends. Submissions cannot use JavaScript, SVG, images, or external assets, and are rendered in a headless Chromium browser on Ubuntu 18.04. Learn courses add interactive levels and quizzes for beginners, intermediate learners, and experts. The free plan permits only the current day’s target. PLUS adds more than 1,100 past Daily Targets, top solutions, plugins, statistics, search and sharing, unlimited history, and a VSCode editor. CSSBattle Free costs nothing; PLUS costs $4.90 a month or $59 a year.