Top 29 Plagiarism Checker Software SaaS Companies in August 2026

Chicago, Illinois, United States

In 2017, our founders wanted to find a way to help students still learning English improve their writing. Today, our brands—QuillBot, Scribbr, and LanguageTool—are on a mission to make written communication better and more efficient. Our personalized AI tools empower 56M people around the world to learn and improve their writing, enabling better communication across languages and cultures. Career opportunities at QuillBot, Scribbr, and LanguageTool will come from the talent acquisition team at QuillBot.

Oslo, Oslo, Norway

Get your institution moving faster, more efficiently and improve student experience with an end-to-end digital assessment ecosystem that integrates with your learning management system. Since 1999 (yes, Inspera is old enough to hire a car now!), Inspera has worked to transform education and provide equal and accessible assessment to every learner, from K-12 through to higher education and beyond. Products: Inspera Assessment: Author, deliver, monitor and grade Inspera Originality: Check for similarity and AI-generated content Inspera Proctoring: AI-assisted live and recorded proctoring We work with some of the most prolific universities in the world, as well as governments, awarding bodies and schools to provide flexible and secure assessment and help maintain integrity. We believe in working with students to teach where the line in academic misconduct is drawn, including plagiarism, AI misuse and assessment by proxy. We’re known around the globe for reliability, even when used at scale with thousands of simultaneous assessments. Allowing you to deliver assessments as you need, without compromise.

New York, New York, United States

GPTZero is the world's leading AI-text identification platform. Our mission is to restore information quality and transparency on the internet. We give millions of users the ability to see the origin, reliability, and quality of information, and enable responsible adoption of AI.

Chicago, Illinois, United States

A TIME World's Top EdTech Company 2024, Packback is an education technology company, specializing in Instructional AI, located in Chicago Illinois. Packback's mission is to harness the power of AI to help educators implement high quality pedagogy at scale. Packback's AI-enabled platform helps students build and master foundational skills such as critical thinking, writing, and research. Our products, Packback Questions, an AI-aided online discussion platform, and Packback Deep Dives, an AI-aided writing and research tutor. Empower students to find and leverage their own unique voice through mastery based learning and sound pedagogy. We believe education technology should change outcomes, rather than just score them...and that students shouldn’t have to fail in order to learn from mistakes. Packback changes outcomes by investing in all of the coachable moments before a student presses submit on their work. Packback’s purpose is to help every student develop their unique voice, and the writing skills to express it.

Scottsdale, Arizona, United States

Proctorio's mission is to expand access to education and ensure integrity in all learning environments. Proctorio is a comprehensive remote proctoring service offering identity verification and exam-proctoring services to more than 4,000 higher education, K-12, corporate, and federal institutions around the world, proctoring more than 30 million exams in 2021 alone. Proctorio has the lowest bandwidth requirements in the industry and prioritizes user privacy and security with end-to-end encryption. Its browser extension integrates seamlessly with most learning management systems (LMS) and third-party assessment platforms, while a suite of Lock Down, Recording, and Verification options allows exam administrators to customize exams for their needed level of exam security. Proctorio currently serves 4 million active weekly users and has proctored more than 80 million exams since 2013 while maintaining 99.991% uptime. Learn more about Proctorio at proctorio.com.

London, England, United Kingdom

Over three million people have used ProWritingAid to improve their writing. ProWritingAid is the smart writing assistant, providing personalized advice on your writing. For businesses, ProWritingAid provides writing training for your staff at the point of need and at a fraction of the cost of classroom-based training. Fortune 500 businesses use ProWritingAid to supercharge their internal and external communications. Get in touch to learn how you could benefit.

Chavanod, Auvergne-Rhône-Alpes, France

Compilatio is a leader in developing the culture of integrity. We support teachers, students and writing professionals on a daily basis to - Detect similarities and AI-generated content - Prevent plagiarism and ghostwriting - Take action for authenticity For more information about our services, please visit the product section or visit our website: https://www.compilatio.net/en

Warsaw, Masovian Voivodeship, Poland

Silk Data was founded by PhD-titled experts with 80 years of combined academic and business experience, to help companies automate routine tasks and improve their digital products through AI-based technology of human language understanding. We provide ready-made and build custom software solutions that challenge the following tasks: - text understanding and analytics - extraction of insights, key data, and personal information out of texts - classification and categorization of documents and other textual content - giving personalized content recommendations - finding semantically similar stuff, and etc. Companies from legal, regulation, research, marketing domains trust our expertise as well as publishing houses, online retail, and software providers. Please reach out via LinkedIn or [email protected] to ask for a demo or a free consultancy.