Overflow
Overflow is a tool for creating and presenting interactive user flow diagrams, then sharing them for feedback.
What Overflow is
Overflow is a tool for creating and presenting interactive user flow diagrams, then sharing them for feedback. It syncs designs from Figma, Sketch, Adobe XD, and Adobe Photoshop. Diagrams can include customizable connectors, styles, device skins, hotspots, shapes, text, and multiple boards. Users can make 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 options include personal and team folders, editor invitations, comments, mentions, and notifications, with integrations for Confluence, Jira, and Trello. Overflow is available for macOS, Windows, and web browsers. The 14-day trial requires no credit card and includes 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 per user/month, billed monthly, and includes 1GB cloud storage per user, Cloud sharing, folders, and comments. Enterprise pricing is available by contacting sales.
Good
- Syncs designs from Figma, Sketch, Adobe XD, and Photoshop.
- Supports playable flows, Stories, and rapid prototypes.
- Cloud publications can be shared, embedded, or exported.
- Trial lasts 14 days and requires no credit card.
- Pro includes 1GB cloud storage per user.
Watch out
- No free plan is available.
- Trial desktop and Cloud access ends after 14 days.
- Trial data is deleted after 60 days without a subscription.
- A seat can be used on only one computer at a time.
Who it suits
Overflow suits people who need to build and share interactive user flows, including teams collaborating through comments, folders, and design-tool integrations.
Verdict
Overflow combines interactive flow diagrams, presentations, and collaboration tools across desktop and web. The no-credit-card trial provides access for 14 days, while continued access requires a subscription.
Plans and prices
From Overflow's own pricing page, checked 15 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Pro | €19.95 a month | 1GB cloud storage per user · Overflow Cloud sharing · private and team folders · embedded share links · PDF printing · watermark-free export · comments · per user/month |
| Enterprise | Priced on request | Everything in Pro · advanced security permissions · SSO/SAML · unlimited users · pre-approved external reviewers · unlimited cloud storage · priority support · contact sales |
The facts
Each one read from Overflow's own pages, with the date it was checked.
Money
- 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.checked 1 Oct 2026
What it does
- Annotations
- Text and shapes can be added to provide explanatory context.checked 15 Oct 2026
- Boards
- Documents can be divided into multiple boards and subflows for navigation and presentation.checked 15 Oct 2026
- Canvas flows
- Users can import designs and arrange screens into bird’s-eye user-flow diagrams.checked 15 Oct 2026
- Cloud publishing
- Published flows generate share links that recipients can view without installing the app.checked 15 Oct 2026
- Collaboration
- Teams can use personal and shared folders, invite document editors and access version history.checked 15 Oct 2026
- Collaboration integrations
- Overflow lists Confluence, Jira and Trello collaboration integrations and supports embedding presentations in collaboration or content-management tools.checked 1 Oct 2026
- Connectors
- Connectors can be drawn from layers to screens and customized with colors, labels and endpoints.checked 15 Oct 2026
- Data hosting
- The pricing FAQ says cloud data is stored on AWS servers located in the United States.checked 15 Oct 2026
- Data location
- Overflow says its servers are located in the United States and cloud data is stored in AWS Amazon Cloud.checked 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.checked 1 Oct 2026
- Design synchronization
- The desktop app syncs designs from Figma, Sketch, Adobe XD and Adobe Photoshop.checked 15 Oct 2026
- Design syncing
- It integrates with Figma, Sketch, Adobe XD and Adobe Photoshop for syncing designs.checked 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.checked 15 Oct 2026
- Desktop limit
- Each seat can be activated on multiple computers but used on only one computer at a time.checked 1 Oct 2026
- Diagram features
- Features include customizable connectors, styles, device skins, hotspots, shapes, text and multiple boards.checked 1 Oct 2026
- Documentation
- The Learn Center provides installation guidance, workflow articles, FAQs and a release archive.checked 15 Oct 2026
- Embedding
- Presentations can be embedded in collaboration tools, websites and blogs.checked 15 Oct 2026
- Export
- Entire flows or individual boards can be exported to PDF or PNG.checked 15 Oct 2026
- Feedback
- Stakeholders can comment on shared publications, with email notifications and mentions available.checked 15 Oct 2026
The company
- Company facts
- LinkedIn lists PROTOIO INC as privately held, founded in 2011, headquartered in San Francisco and employing 11–50 people.checked 15 Oct 2026
- Company identity
- PROTOIO INC describes itself as the maker of Proto.io and Overflow.checked 15 Oct 2026
- Headquarters
- San Francisco, California, United Stateschecked 23 Sep 2026
Where it runs
- Device skins
- Overflow automatically detects suitable device skins for common devices and applies them to artboards.checked 15 Oct 2026
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