Collaborative text annotation platform - 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

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$

Annotations is a Mac application that simplifies document annotation with highlights, keywords, and notes while maintaining document clarity, designed for researchers, students, and data analysts.

• Free

Vionote is a smart camera app for iOS that adds text notes, timestamps, and GPS info directly onto photos and videos, perfect for documentation and visual note-taking.

• Other

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$

EduPad is a free collaborative text editor based on EtherPad that allows multiple users to edit documents simultaneously with real-time visibility of edits, requiring no registration.

• Free

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$

Twiddla is a browser-based online whiteboard that offers real-time collaboration, co-browsing, and annotation for education and remote teams, without requiring plug-ins or sign-ups.

• Free Trial

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

• Freemium

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$

Notion is an all-in-one workspace platform that combines docs, wikis, projects, and AI capabilities to help teams collaborate and organize work efficiently.

• Freemium
• From 10$

Scribble Together is a collaborative online whiteboard tool that enables real-time drawing, handwriting equations, diagram creation, and PDF markup across devices, with seamless sharing and no registration required for guests.

• Freemium
• From 5$

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

I, Librarian is an online reference manager and PDF organizer that centralizes document storage, enables full-text search, and facilitates private group collaboration for students and research professionals.

• Other

Annotate.tv is an AI-powered video annotation tool that helps learners, educators, and content creators take timestamped notes on YouTube videos, extract transcripts, chat with videos, and export notes to various formats.

• Freemium
• From 5$

Grug Notes is a straightforward note-taking application that utilizes AI to automatically organize text by identifying people, companies, and dates, extracting structured data, and enabling semantic search.

• Paid
• From 15$