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AI language coach offering conversational practice with real-time feedback across 130+ languages.
Gamified platform to learn 20+ programming languages via interactive lessons, a browser playground and an AI tutor.
AI-personalized online A Level and GCSE courses for UK students, backed by an A*/A grade guarantee or money back.
Well-adopted AI research assistant for finding papers, summarizing, and extracting data at scale.
Free AI-powered academic search engine indexing 236M+ papers, for researchers wanting semantic literature discovery and an augmented reader.
No public pricing
Free trial available
No public pricing
Free trial available
No public pricing
- ✦Conversational practice with AI tutors
- ✦Real-time personalized feedback and corrections
- ✦Dialogue, sentence, word, call, photo, and debate modes
- ✦Voice interaction with natural AI voices
- ✦Grammar courses and language certificates
- ✦130+ languages on web, iOS, and Android
- ✦Interactive lessons in 20+ languages
- ✦Browser playground to run code with no setup
- ✦AI tutor that explains and debugs code
- ✦Shareable completion certifications
- ✦Cheat sheets, docs and developer tools
- ✦Team/business training option
- ✦Interactive video lessons mapped to specific exam boards
- ✦AI diagnostic algorithm for personalized revision
- ✦Detailed progress tracking across the curriculum
- ✦Guided exam-question walkthroughs
- ✦24/7 online tutor support via chat
- ✦A*/A grade guarantee with money-back policy
- ✦3-day free trial with no payment details required
- ✦AI-enabled systematic reviews
- ✦Research reports
- ✦Upload your own PDFs
- ✦Quick summaries
- ✦Source quotes
- ✦Question answering
- ✦AI-powered semantic search across 236M+ papers
- ✦Semantic Reader for augmented, contextual paper reading
- ✦Free public API for paper search and metadata
- ✦Author and topic discovery
- ✦Citation graph exploration
- ✦Beta program for new features
- →Self-learners practicing conversational fluency
- →Business teams training employees in new languages
- →Students supplementing classroom language education
- →Learning to code from scratch
- →Practicing a new programming language
- →Getting instant AI help while coding
- →Earning certificates to share
- →Onboarding and training engineering teams
- →A Level students preparing for AQA, Edexcel, OCR, or Cambridge International exams
- →GCSE students studying Combined Science
- →Students wanting AI-personalized revision instead of generic textbooks
- →Schools looking to boost student attainment with a supplementary platform
- →Speeding up literature reviews
- →Automating systematic reviews and meta-analyses
- →Learning about new domains
- →Data extraction in rigorous systematic literature reviews
- →Researchers searching scientific literature across disciplines
- →Developers building applications on top of scholarly data via the API
- →Students exploring citation networks for a topic
- →Librarians and academics needing free literature discovery tools