Petal review
A capable free reference manager with AI, collaboration, and web-first access.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Petal is a cloud-based reference manager for academic researchers, research labs, university faculty, graduate researchers, and industry professionals. It stores PDF documents and organizes them with collections, metadata, tags, deduplication, annotations, comments, and full-text search. Citation generation supports more than 10,000 styles, while BibTeX export, Word export, browser capture, and a Microsoft Word add-in support research and writing workflows. Shared workspaces and AI-assisted document analysis extend its use to collaborative literature review, summarization, translation, and explanation.
The free plan is a practical starting point for individual researchers, with 1 GB of cloud storage, 1 seat, 2 collections, 3 annotations per document, and unlimited citation lists. Plus costs $4.99 per user per month when billed annually and adds 2 GB of storage, unlimited collections and annotations, citation export, and 400 credits per month. Advanced costs $13.99 per user per month on annual billing and adds 10 GB of storage, multi-document chat, and AI Create alongside the Plus features. Premium includes 25 GB of storage, unlimited collections and annotations, multi-document chat, and AI Create.
Petal fits researchers who want citation management, PDF annotation, browser capture, Word-based citations, and AI features in one web-centered workspace. Its integrations with Microsoft Word, Chrome, Firefox, and Safari support common desktop research flows, and collaboration makes it suitable for shared projects. The trade-off is platform scope: Petal is available through the web and Chrome extension, with no mobile apps. Researchers who need mobile access or a broader app footprint should consider an alternative; those comfortable with browser-based work will find the free plan and paid AI tiers easier to match to their workflow.
Petal pros and cons
- Where it wins
- Free plan includes unlimited citation lists and PDF organization
- More than 10,000 citation styles plus Word and BibTeX export
- AI analysis, shared workspaces, and browser-based source capture
- Where it doesn't
- Access is limited to the web and browser platforms
- Free plan allows only three annotations per document
- No mobile apps are included
Petal fact sheet, pricing and score →
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