Collaborative annotation tool - AI tools

CATMA is a free, browser-based platform designed for collaborative text annotation, analysis, and visualization, ideal for qualitative and quantitative research in the digital humanities.

• Free

Commented.io is a collaborative platform enabling teams to add comments and annotations directly onto live web pages and mobile apps for streamlined feedback and faster project development.

• Free Trial
• From 4$

tagtog is a versatile text annotation platform designed for creating AI training data, supporting manual and automatic annotation, collaboration, and PDF processing.

• Freemium

Vimageo offers advanced tools for image and video annotation, enhancing media analysis and collaboration through features like AI assistance and cloud integration.

• Freemium
• From 5$

Collabwriting streamlines online research by enabling users to highlight, save, share, and collaborate on web content and PDFs, featuring AI-powered search.

• Freemium

Hylinker is a browser extension that enables users to annotate webpages and PDFs, connecting notes, images, and videos with bi-directional links. It supports integration with popular note apps, offering both offline-first capabilities and real-time synchronization across devices.

• Freemium
• From 2$

Cubby is a private workspace for storing files and links, annotating content, and synthesizing research with AI. It offers a collaborative environment for teams to manage and analyze information.

• Free Trial
• From 16$

PinMy is a cross-platform visual collaboration tool that enables users to annotate, share, and connect on multiple file formats, featuring voice-to-text conversion and precise feedback capabilities.

• Freemium
• From 10$

UnitCollab streamlines team collaboration with real-time chat, activity feeds, and contextual reviews, offering a user-friendly workspace for productive project management.

• Other

NowComment enables collaborative discussion and annotation of texts, images, and videos, enhanced by GPT-powered AI Thinking Partners that assist users in reading, writing, and analyzing content.

• Free

Squidly.ink allows users to comment and collaborate directly on any website, similar to Figma or Google Docs. Enhance team communication and streamline workflows.

• Free