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Work · March 6, 2018

Overflow

The world’s first user flow diagramming tool for designers

Overflow launched on March 6, 2018 with 1,139 votes, #3 of 2,954 launches that month and more than 99% of that year's launches. The site was still online in September 2026, 8 years on.

Visit overflow.io ↗Overflow alternativestop 1% of March 2018

In plain words

Overflow is a user flow diagramming tool designed for designers to create visual maps of user interactions and journeys. It enables designers to build and organize user flows efficiently, allowing them to spend less time on diagram creation and more time gathering feedback on their designs. The tool helps communicate design concepts clearly to stakeholders and team members through structured flow visualizations.

written from the facts on this page · September 2026

From the sources

Overflow is the world’s first user flow diagramming tool tailored for designers. It makes building beautiful user flows effortless, leaving time to focus on what matters: communicating designs to get valuable feedback.

Create interactive user flows and stunning design presentations to engage your audience in synchronous or asynchronous design critique.

Get started with an overview of a typical workflow in Overflow. The standard Overflow subscription, giving you access to all major features. Tailored to your organization’s unique scalability and security needs. Bring in your designs from your favorite design tool, build user flow diagrams to show the user journey and share your interactive birds-eye-view presentation with your team or clients. Switch to a screen-by-screen view to show the fine details of your designs. Interact with the out-of-the-box rapid prototype with your mouse or navigate with your arrow keys with ease. Create interactive, self-guided design walkthroughs and allow your audience to follow your presentation at their own…from overflow.io

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