ZoteroOpen-source reference manager for collecting, organizing, citing, and sharing research.

5.0 (4)

Reviewed by Daniel Nikulshyn·Updated July 2026

Open Source Research Citation Management Collaboration Productivity Academic Free Plugins

Overview

Zotero is a free, open-source research tool that helps academics, students, and writers collect citations, organize sources, and generate bibliographies. It captures references directly from browsers, databases, and PDFs, then stores them in a searchable library with attached files, notes, and tags. Beyond basic citation management, Zotero supports collaborative group libraries, syncs across devices, and integrates with Word, LibreOffice, and Google Docs for in-text citations in thousands of styles. A growing ecosystem of plugins adds AI-assisted features like PDF summarization, semantic search, and automated tagging, extending its core workflow for modern research.

Key features

One-click reference capture from web sources
PDF storage with annotation and note-taking
Citation generation in 10,000+ styles
Shared group libraries for collaboration
Cross-device sync and backup
Plugin support for AI and workflow extensions

Pricing

Model: Freemium
Category: Information Agents
Rating: 5.0 / 5 (4)

Use cases

Manage citations for academic papers

Capture references from databases and browsers, then insert formatted citations and bibliographies directly into Word, LibreOffice, or Google Docs using thousands of citation styles.

Organize PDF research libraries

Store, tag, annotate, and search PDFs alongside their metadata, building a personal searchable knowledge base accessible across synced devices.

Collaborate on group research projects

Share group libraries with co-authors or lab members so teams can collectively gather, annotate, and cite sources for joint publications or literature reviews.

Extend workflows with AI plugins

Add community plugins to enable PDF summarization, semantic search, and automated tagging, layering modern AI capabilities onto an established reference manager.

Pros & Cons

Pros

Free and open-source with no paywalls for core features
Strong browser and word processor integrations
Active plugin ecosystem including AI extensions
Supports collaborative group libraries

Cons

Default cloud storage is limited to 300MB free
AI features require third-party plugins
Interface feels dated compared to newer tools

Reviews

5.0

Average from 4 ratings.

Liam O’Connor

Apr 29, 2026

Solid for our team

We rolled this out across the team last quarter and free and open-source with no paywalls for core features. PDF storage with annotation and note-taking fits neatly into how we already work, and cross-device sync and backup removed a step we used to do by hand. but it has held up under daily use.

Gunnar Eriksson

Jan 21, 2026

Solid for our team

We rolled this out across the team last quarter and free and open-source with no paywalls for core features. Plugin support for AI and workflow extensions fits neatly into how we already work, and plugin support for AI and workflow extensions removed a step we used to do by hand. Default cloud storage is limited to 300MB free, which is the main caveat, but it has held up under daily use.

Frank Müller

Nov 13, 2025

Does the job

Pretty happy overall. Cross-device sync and backup just works and active plugin ecosystem including AI extensions. Default cloud storage is limited to 300MB free can be annoying, but no dealbreakers — I'd recommend it to a friend without hesitating.

Tariq Aziz

May 28, 2025

Does the job

Pretty happy overall. Shared group libraries for collaboration just works and free and open-source with no paywalls for core features. but no dealbreakers — I'd recommend it to a friend without hesitating.