Perplexity
Education & ResearchAI answer engine that searches the web and cites its sources.
AI essay grading for teachers.
CoGrader has a free plan or free trial, with paid plans for more features or usage.
AI essay grading for teachers.
Popular alternatives include Perplexity, Busuu, Brilliant.
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AI answer engine that searches the web and cites its sources.
Language learning with AI and native speakers.
Interactive lessons in math, science and coding.