Codility vs Project Euler
Codility
codility.comProject Euler
projecteuler.netSide by side
| Figure | Codility | Project Euler |
|---|---|---|
| Price from | $100/mo | Free |
| Free plan | — | Yes |
| Free trial | Yes | — |
| Open source | — | — |
| Web | Yes | Yes |
| Windows | Yes | — |
| macOS | Yes | — |
| API | Yes | — |
| Plans published | 3 | 1 |
| Spec score · Coding Challenge Platforms | 9.0 (#3) | 7.2 (#23) |
| 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 site says connections use HTTPS and that passwords and account recovery keys are hashed using PHP’s one-way password hashing algorithm. |
| Support | The help center offers searchable articles, tutorials, integration guidance, security administration and ticket support. | Privacy or security concerns can be sent to [email protected]; other queries are directed to the alternative forum. |
Plans
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.
Project Euler
Project Euler has no write-up on Specifiction yet; its figures are above.