Best AI Grading Tools for Teachers in 2025

Artificial intelligence has reshaped modern classrooms in two distinct and often conflicting ways. On one hand, students now have easy access to generative AI systems that can complete essays, homework, and even coding assignments with minimal effort. On the other hand, teachers have gained access to AI-powered grading tools that significantly reduce administrative workload. What once required hours of manual marking can now be completed in minutes, allowing educators to focus more on instruction, feedback, and student development.

Most AI grading platforms work by allowing teachers to upload student submissions along with a rubric or marking scheme. The system then evaluates each submission, assigns scores, and generates feedback automatically. However, as AI-written content becomes more common, grading alone is no longer sufficient. Teachers also need reliable ways to check whether assignments were written by students themselves or generated by AI tools.

This guide examines the best AI grading tools currently available, with special attention to whether they address both grading efficiency and AI or plagiarism detection.

Quick Comparison of AI Grading Tools

The tools reviewed in this article vary widely in scope. Some focus on essay grading, others support exams and handwritten work, and only a small number integrate AI and plagiarism detection directly into the grading workflow. The following sections explore each platform in detail.

Aigcchecker AI Grader

Aigcchecker is widely recognized for AI detection, but its classroom tools extend well beyond that capability. Its AI grader is designed to handle full grading workflows while also checking every submission for AI-generated content and plagiarism by default. This dual approach addresses one of the biggest challenges teachers currently face: evaluating student understanding while ensuring academic integrity.

The grading process begins with selecting a standard rubric or uploading a custom one. Teachers then calibrate the system by grading a small number of submissions themselves, allowing the AI to learn their grading style. Once calibrated, the system evaluates all remaining submissions, assigning scores and generating detailed feedback. Teachers remain in full control and can adjust grades or comments before releasing results.

An important advantage is its integration with major learning management systems, allowing teachers to grade assignments directly within their existing classroom platforms. After grading, results can be exported in multiple formats, including PDF and document files, with AI and plagiarism reports included.

Aigcchecker also provides class-level analytics that highlight common weaknesses and suggest instructional follow-up actions. For teachers concerned about disputes, writing replay features can be used to provide transparency into how a piece of writing was produced.

Pricing starts at $8.33 per month, with free demos available and district-level pricing offered.

Gradescope

Gradescope is a robust grading platform designed for large-scale and complex assessments. It supports a wide range of assignment types, including exams, coding assignments, mathematical work, and handwritten submissions. Students can upload scanned handwritten work using their phones, and teachers can associate submissions with individual students.

A standout feature is answer grouping. The system clusters similar responses together, allowing teachers to grade one representative answer and apply that grade to the entire group. This approach is particularly effective for exams and problem-based assessments. Teachers can also manually adjust groups for more complex cases.

Gradescope supports regrade requests, which institutions can enable or disable based on policy. While it excels in grading efficiency and flexibility, AI writing detection is not its primary focus.

Pricing is available through institutional plans, with a one-term trial offered to eligible users.

CoGrader

CoGrader is designed specifically for essay and open-ended writing assignments. The workflow centers around rubrics, which can be selected from a built-in library, imported, or generated using AI. Integration with classroom platforms allows teachers to import assignments and submissions with minimal setup.

The system evaluates essays against the selected rubric, providing suggested grades and feedback on elements such as ideas, organization, development, and language use. Teachers review and finalize grades before sharing results with students. Performance analytics at the class level help identify trends and learning gaps.

CoGrader offers a free tier with limited submissions and paid plans starting at $19 per month.

Marking.ai

Marking.ai focuses on essay grading with an emphasis on detailed analytics. Teachers upload assignments, review AI-generated marks and feedback, and retain full control over final scores. Feedback is delivered at the question level, helping students understand both strengths and areas for improvement.

An AI assistant is available during review, allowing teachers to ask for suggested exercises or targeted support strategies for struggling students. After approval, results can be shared through multiple formats, including spreadsheets and document links.

The platform provides detailed insights at both the individual student and class levels. Pricing starts at $29 per month, with no free trial available.

Brisk

Brisk functions primarily as a feedback generator rather than a full grading tool. It does not assign scores but instead focuses on formative feedback. Teachers can generate feedback in multiple styles, such as rubric-based comments, targeted inline suggestions, or next-step guidance.

The tool integrates with common classroom platforms and can be accessed through a browser extension. While useful for improving student writing, it does not replace a grading system and lacks built-in AI or plagiarism detection.

Brisk offers a free plan with limited feedback styles and custom pricing for schools and districts.

Choosing the Right AI Grader

Each AI grading tool serves a different purpose. Some prioritize large-scale assessment efficiency, others focus on writing quality and feedback, and only a few address academic integrity directly. As AI-generated student work becomes more common, built-in AI and plagiarism detection is no longer optional but essential.

Among the tools reviewed, Aigcchecker stands out as the only platform that combines full grading automation with integrated AI and plagiarism checks. This reduces the need for teachers to rely on separate detection tools and ensures that grading decisions are based on both quality and authenticity.

For educators seeking a comprehensive solution that saves time while maintaining trust and transparency, AI graders with built-in verification capabilities represent the most future-ready option.