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

DiscoverText is a cloud-based text analytics software that combines human annotation and machine learning to sort, clean, and analyze large volumes of unstructured text data. It offers multilingual features, document redaction, and custom classifier creation.

• 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$