- Home
- User Flow Software
- Overflow
Overflow
San Francisco, California, United States
What it is
Overflow is software for creating, presenting, sharing, and discussing interactive user flow diagrams. It synchronizes designs from Figma, Sketch, Adobe XD, and Adobe Photoshop. Diagram tools include adjustable connectors and styles, device skins, hotspots, shapes, text, and multiple boards. Users can build playable flows, self-guided Stories, and rapid prototypes. Cloud publications can be shared by link, embedded, protected with a passphrase, exported to PDF or PNG, or printed. Collaboration includes personal and team folders, editor invitations, comments, mentions, and notifications. Integrations are listed for Confluence, Jira, and Trello, and presentations can be embedded in collaboration or content-management tools. Overflow runs on macOS, Windows, and web browsers. Its 14-day trial requires no credit card and provides desktop-app and Cloud-sharing access without limitations. After the trial, that access ends; data remains hosted for 60 days and is then deleted if no subscription is activated. Pro costs €19.95 a month (billed per user/month; 1GB cloud storage/user · Overflow Cloud sharing · private and team folders · comments). Enterprise pricing is available by contacting sales.
For and against
For
- Syncs designs from four named tools
- Supports interactive flows and prototypes
- Exports publications to PDF or PNG
- Includes comments, mentions, and notifications
- 14-day trial needs no credit card
Against
- No free plan
- Trial access ends after 14 days
- Data is deleted after 60 days without subscription
- Desktop seat runs on one computer at a time
The verdict
Overflow combines flow-diagram creation with presentation and review tools across desktop and web platforms. The trial is broad, but continued desktop and Cloud access requires a subscription.
Who it suits
Overflow suits designers and teams presenting user flows, prototypes, or interactive product stories. Its collaboration and embedding options also fit groups sharing diagrams for review.
Plans and prices
Pro
1GB cloud storage per user · Overflow Cloud sharing · private and team folders · embedded share links
Read 15 Oct 2026 · overflow.io
Enterprise
Everything in Pro · advanced security permissions · SSO/SAML · unlimited users
Read 15 Oct 2026 · overflow.io
On the record
- After trial
- After the trial, desktop-app and Cloud-sharing access ends; data remains hosted for 60 days and is then deleted if no subscription is activated.overflow.io · read 1 Oct 2026
- Annotations
- Text and shapes can be added to provide explanatory context.overflow.io · read 15 Oct 2026
- Boards
- Documents can be divided into multiple boards and subflows for navigation and presentation.overflow.io · read 15 Oct 2026
- Canvas flows
- Users can import designs and arrange screens into bird’s-eye user-flow diagrams.overflow.io · read 15 Oct 2026
- Cloud publishing
- Published flows generate share links that recipients can view without installing the app.overflow.io · read 15 Oct 2026
- Collaboration
- Teams can use personal and shared folders, invite document editors and access version history.overflow.io · read 15 Oct 2026
- Collaboration integrations
- Overflow lists Confluence, Jira and Trello collaboration integrations and supports embedding presentations in collaboration or content-management tools.overflow.io · read 1 Oct 2026
- Company facts
- LinkedIn lists PROTOIO INC as privately held, founded in 2011, headquartered in San Francisco and employing 11–50 people.linkedin.com · read 15 Oct 2026
- Company identity
- PROTOIO INC describes itself as the maker of Proto.io and Overflow.linkedin.com · read 15 Oct 2026
- Connectors
- Connectors can be drawn from layers to screens and customized with colors, labels and endpoints.overflow.io · read 15 Oct 2026
- Data hosting
- The pricing FAQ says cloud data is stored on AWS servers located in the United States.overflow.io · read 15 Oct 2026
- Data location
- Overflow says its servers are located in the United States and cloud data is stored in AWS Amazon Cloud.overflow.io · read 1 Oct 2026
- Data security
- The privacy policy says sensitive data is protected in transit with SSL, TLS or similar encryption and firewalls are used to help prevent external network access.overflow.io · read 1 Oct 2026
- Design synchronization
- The desktop app syncs designs from Figma, Sketch, Adobe XD and Adobe Photoshop.overflow.io · read 15 Oct 2026
- Design syncing
- It integrates with Figma, Sketch, Adobe XD and Adobe Photoshop for syncing designs.overflow.io · read 1 Oct 2026
- Desktop availability
- The editor is offered only for macOS and Windows desktops or laptops; cloud publications work in major desktop and mobile browsers.support.overflow.io · read 15 Oct 2026
- Desktop limit
- Each seat can be activated on multiple computers but used on only one computer at a time.overflow.io · read 1 Oct 2026
- Device skins
- Overflow automatically detects suitable device skins for common devices and applies them to artboards.overflow.io · read 15 Oct 2026
