AI research assistant / academic search
Liner is an AI-powered research assistant and search engine for academics, students, and knowledge workers. It provides cited advanced search, Deep Research mode, file upload analysis, and access to major AI models (ChatGPT, Gemini, Claude) in an ad-free research environment. Note: liner.ai is a separate no-code ML training tool; the AI search product lives at liner.com (formerly getliner.com, which now returns HTTP 410).
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Directory entries often confuse liner.ai (ML trainer) with Liner AI search (liner.com). Liner competes directly with Perplexity in academic/research niche with stronger file analysis and multi-model access. Pro at $14.99/mo annual is competitively priced. Deep Research limits are the key constraint—Max tier needed for heavy users. Domain migration from getliner.com to liner.com is complete.
In-depth description and capability notes.
Advanced Search with cited sources and ad-free experience (paid) Deep Research mode for multi-step academic investigation File upload analysis (25MB–200MB per file by tier) Access to ChatGPT, Gemini, and Claude models on Pro+ Image generation and Liner Scholar/Liner Write suite Team workspace with admin controls (2–20 seats) Agent credits for automated research tasks
Liner fits researchers, students, and professionals who need cited AI search and document analysis beyond basic chatbot queries. Academic literature review with cited sources Deep Research on complex multi-source questions Analyzing uploaded PDFs and research papers Ad-free AI search with frontier model access Team research collaboration with shared workspace Comparing AI model outputs for research tasks