plagiarism-detection
(4)
Codility
Codility is a B2B SaaS platform for technical hiring that lets enterprises assess software engineers' real-world coding skills remotely and at scale. Founded in 2009 and bootstrapped for a decade before raising a $22M Series A in 2020, it offers automated coding assessments, live technical interviews and skills-intelligence tools used by teams at companies including GitHub, Tesla, SAP and Barclays. It is also known publicly for its free algorithm 'Lessons' that developers use to practice for interviews.
Copyleaks
Copyleaks is a New York-based content authenticity company that uses AI to detect plagiarism, AI-generated text, source code, and increasingly images and video. Founded in 2015 by Alon Yamin and Yehonatan Bitton, it serves educational institutions, publishers, and enterprises that need to verify whether content is original, licensed, or machine-generated, and it claims over 99% accuracy across 30+ languages with integrations into major learning management systems.
HackerRank
HackerRank is a technical skills platform that helps companies screen, interview, and hire developers based on what they can actually build rather than what their resume claims. Founded in 2009 by Vivek Ravisankar and Hari Karunanidhi, the company runs a two-sided model: a community where millions of developers practice coding challenges, and an enterprise product that lets 3,000+ companies - including a large share of the Fortune 100 - assess candidates with real-world coding tests, live pair-programming interviews, and, increasingly, AI-assisted evaluation and proctoring.
GPTZero
GPTZero is a New York-based AI startup that builds tools to detect AI-generated text and verify human authorship. Launched in January 2023 by Princeton senior Edward Tian, it grew from a viral side project into a profitable company serving over 10 million users and 100+ organizations across education, hiring, publishing, and legal. Its mission is to restore trust and transparency to writing on the internet as large language models flood it with machine-made text.