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Liner

Free tier

Accurate AI agents built for smarter work

Free tier available·All audiences·Powered by Multiple providers: OpenAI (ChatGPT), Google (Gemini), Anthropic (Claude)·API available

Key strengths

Cited answers with one-click citation verificationAcademic research with paper finding and literature reviewsAI-powered professional writing and draftingDeep Research for comprehensive topic reportsFile upload and PDF analysisMulti-model support (ChatGPT, Gemini, Claude)AI security and compliance focusMCP/API access for developers
Free tier + paid plans · from $14.99 USD/mo
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Liner — Technical Use Cases

1. Multi-Model Evaluation & Routing

Developers and power users can query ChatGPT, Gemini, and Claude from a single interface, enabling side-by-side model comparison or task-specific model selection without managing separate API keys or UIs.

2. Document-Grounded RAG Workflows

Liner's file upload and PDF analysis feature supports document-grounded question answering, useful for teams that need in-context analysis of technical documentation, contracts, or research papers without building custom retrieval pipelines.

3. Automated Research Report Generation

The Deep Research mode produces structured, comprehensive topic reports — suitable for integration into content pipelines, competitive intelligence workflows, or automated briefing systems via the API.

4. Academic Literature Discovery at Scale

Liner Scholar's paper-finding and literature review capabilities can accelerate systematic review workflows for research teams, surfacing relevant academic sources with cited, verifiable references.

5. Enterprise AI with Compliance Controls

Liner's stated AI security and compliance focus makes it a candidate for enterprise deployments in regulated industries where auditability (via citation verification) and security controls are required.

6. Developer Integration via MCP/API

Teams can embed Liner's search, research, and writing capabilities into internal tools, knowledge bases, or productivity platforms using MCP or the available API — reducing the need to build and maintain custom LLM orchestration layers.