Best Red Pen Alternatives & Competitors in 2024

Prototyping and collaboration for design teams

The all-in-one design sharing, collaboration, workflow and app prototyping platform

paid Free Trial $8.0 / Monthly

RealityMAX is the AI-powered 3D design collaboration platform, 100% online. Cooperate remotely with your colleagues on 3D projects and easily share your work with clients. Create Web3D and AR experiences in a snap, without a line of code.

Visit website freemium $40.0 / Monthly (Pro with up to 500 GB of storage space)

Flatsies is a tool for designers to share their concepts with clients in a simple and elegant way.

Feedback, prototyping and collaboration for designers

What's next after wireframes? Visual Design and Notism.

15Five software elevates the performance and engagement of employees by consistently asking questions and starting the right conversations.

A service that allows designers and clients to annotate and collaborate on images in real time

Get design feedback and client approval using WordPress.

Remote feedback tool for discussions, brainstorms & retros

Simple visual reviews for your deploy previews

freemium $9.0 / Monthly (For individuals and freelancers – 1 member, 1 project)

Sticky note-based feedback collection tool for live websites

Open Source

Slack notifications whenever you work on Google Drive docs

A free platform for creating beautiful website and mobile app specification documents for your team. No more word templates!