1. IBM Watson Assistant: Watson Assistant offers a powerful AI platform that can be customized for various educational applications.

1. Duolingo: Although primarily known as a language learning app, Duolingo incorporates chatbot features to provide interactive and personalized learning experiences.

1. Brainly: Brainly is an educational platform that includes a chatbot to help students get answers to their academic questions and engage in discussions.

1. Gradescope: Gradescope is an AI-powered grading platform that can provide automated feedback and grading assistance to educators.

1. Coursera: Coursera incorporates AI chatbots in some of its courses to provide interactive learning experiences, answer questions, and guide students through the material.

1. ALEKS: ALEKS (Assessment and Learning in Knowledge Spaces) is an AI-based tutoring system that provides personalized learning paths for students.

1. Querium: Querium offers AI chatbots for math and science tutoring, providing step-by-step guidance and feedback to help students improve their understanding.

Remember that the effectiveness and suitability of a chatbot depend on specific educational needs and goals. It’s advisable to research and evaluate these chatbots based on your unique requirements before making a decision.