About Unriddle (Anara AI)
Unriddle (Anara AI) ranks #2 of 6 in AI Research Tools, holds a 4.2/5 editor rating, starts at $10/month (91% below the $111/mo category average).
Unriddle, now rebranded as Anara AI, is a Y Combinator-backed AI research assistant used by over 3 million researchers at institutions like Stanford, MIT, and Johns Hopkins. The AI research tool lets users upload papers, reports, and multimedia files into workspaces, then ask questions across entire document libraries with passage-level citations. Pricing ranges from free to $167/month for the Max plan, with access to frontier AI models including GPT-5, Claude 4 Sonnet, and Gemini 2.5 Pro.
Best for: Academic researchers conducting literature reviews and graduate students who need to synthesize information across dozens or hundreds of papers with verifiable, passage-level citations.
“Anara (formerly Unriddle) delivers genuine value for academic researchers with its multi-document synthesis and passage-level citations. The Pro plan at $20/month is the sweet spot, offering unlimited usage with premium AI models. One of the best AI research tools available for serious academic work.”
What is Unriddle (Anara AI)?
Overview
Unriddle, which rebranded to Anara AI in March 2025, is an AI-powered research assistant designed to help academics, scientists, and knowledge workers navigate large volumes of documents faster. Backed by Y Combinator and trusted by researchers at Stanford, MIT, Johns Hopkins, GSK, and Intel, Anara has established itself as one of the leading AI research tools in the academic space. The platform allows users to upload research papers, reports, audio files, and videos into organized workspaces, then query across their entire library using natural language with every answer backed by clickable, passage-level citations.
Key Capabilities
Anara's core strength is multi-document synthesis. Users can group related documents into collections and ask questions that span all of them, with the AI comparing findings across papers, highlighting contradictions between studies, and extracting common themes. This makes it particularly powerful for literature reviews and systematic research. The platform provides access to multiple frontier AI models from OpenAI (GPT-5, o4), Anthropic (Claude 4 Sonnet, Claude Opus 4.5), and Google (Gemini 2.5 Pro, Gemini 3 Pro), letting researchers pick the model best suited to their query type.
Beyond text documents, Anara supports audio transcription and video analysis, making it useful for processing recorded lectures, interviews, and conference presentations. The Pro and Max plans include AI agents for deep search, form completion, and automated research workflows. Integration with reference managers like Zotero and Mendeley, plus cloud storage connectors for Google Drive, Notion, and OneDrive, streamline existing research workflows.
Pricing Analysis
Anara restructured its pricing in early 2026 from 3 tiers to 5. The Free plan provides 1,000 AI words per day and 5 uploads. The Plus plan at $10/month expands quotas with access to standard models. The Pro plan at $20/month is the sweet spot for most researchers, offering unlimited AI words, unlimited uploads, access to premium models like Claude 4 Sonnet and GPT-5, and priority support. The Max plan at $167/month (billed yearly) adds Deep Search and Form agents, plus access to the most advanced models like Gemini 3 Pro and Claude Opus 4.5. Enterprise pricing is custom with SSO, SCIM provisioning, and SOC 2 compliance.
Who Should Use This
Anara is built for academic researchers conducting literature reviews, graduate students working through large volumes of papers, research analysts at institutions and corporations, and anyone who needs to synthesize information across multiple documents with verifiable citations. It is particularly valuable for systematic reviews where tracking claims back to source material is critical.
The Bottom Line
Anara (formerly Unriddle) is one of the most capable AI research assistants available, with multi-document synthesis and passage-level citations as genuine differentiators. The Pro plan at $20/month offers outstanding value for serious researchers. While the rebrand from Unriddle to Anara caused some confusion, the underlying technology has only improved with the addition of frontier AI models and new agent capabilities.
Pros
- Multi-document synthesis compares findings across papers and highlights contradictions automatically
- Passage-level citations let you verify every AI-generated claim against source material
- Access to multiple frontier AI models including GPT-5, Claude 4 Sonnet, and Gemini 2.5 Pro
- Integrates with Zotero, Mendeley, Google Drive, Notion, and OneDrive for seamless research workflows
- Supports audio and video files in addition to PDFs and text documents
Cons
- Rebrand from Unriddle to Anara caused confusion and disrupted existing user workflows
- Free tier is very limited at 1,000 AI words per day and 5 uploads
- Max plan at $167/month is expensive for individual researchers without institutional funding
- Learning curve for organizing large document libraries effectively
How to Use Unriddle (Anara AI)
- 1Create Your Workspace
Sign up at anara.com and set up your first workspace. Connect your Zotero, Mendeley, or cloud storage accounts for seamless document import.
- 2Upload Research Documents
Upload PDFs, Word files, audio recordings, or video files. The Free plan supports up to 120 pages or 20MB per upload, scaling to 10,000 pages on Pro.
- 3Organize Into Collections
Group related documents into collections for cross-paper analysis. The AI can then compare findings, highlight contradictions, and extract themes across all documents in a collection.
- 4Ask Questions
Type natural language questions about your documents. Choose from multiple AI models depending on your query complexity and preferred model provider.
- 5Review Cited Answers
Every AI response includes clickable, passage-level citations so you can verify claims directly against the original source material.
- 6Export and Share
Export your findings as structured notes or summaries. Collaborate with team members by sharing workspaces and collections.
Key Features of Unriddle (Anara AI)
Research
2Ask questions across entire document collections with AI comparing findings, highlighting contradictions, and extracting themes
Every AI answer includes clickable citations linking directly to the relevant passage in source documents
AI
1Choose from GPT-5, Claude 4 Sonnet, Gemini 2.5 Pro, and other frontier AI models based on query needs
Input
1Upload and analyze audio recordings and video files alongside traditional text documents
Integration
2Connect with Zotero and Mendeley to import existing reference libraries seamlessly
Sync documents from Google Drive, Notion, and OneDrive directly into your research workspace
Workspace
1Group related documents into collections for targeted cross-paper analysis and systematic reviews
AI Agents
2AI agent that performs comprehensive searches across your document library to find relevant information
Automated agents for deep search, form completion, and structured research workflows on Max plan
Collaboration
1Share workspaces and collections with collaborators, with up to 50 members per folder on Pro
Key Specifications
| Attribute | Unriddle (Anara AI) |
|---|---|
| Free Tier | |
| API Access | |
| Platform Support | Web |
| AI Powered | |
| Multi Document Analysis | |
| Citation Support | |
| Audio Video Support | |
| Collaboration Features |
Use Cases
- Conducting in-depth literature reviews for academic papers.
- Summarizing and extracting key insights from large volumes of research.
- Organizing and cross-referencing findings from multiple sources.
- Streamlining manuscript preparation and academic writing.
- Quickly understanding complex legal, medical, or technical documents.
- Generating citation-ready references for essays and dissertations.
- Brainstorming and drafting content for research-heavy projects.
- Simplifying complex information for educational or professional purposes.
Integrations
- Reference Manager
- ZoteroMendeley
- Cloud Storage
- Google DriveOneDrive
- Productivity
- Notion
- Enterprise
- SharePoint
- Communication
- SlackMicrosoft Teams
Limitations
The free tier is restrictive at just 1,000 AI words per day. The platform is optimized for research documents and academic papers, making it less useful for general-purpose AI assistance. Max plan pricing is steep for individual users.