# Balsamiq, Visio vs Draw.io Comparison | | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Star Rating** | 4.2 out of 5 | 4.2 out of 5 | 4.4 out of 5 | | **Total Reviews** | 500 | 689 | 445 | | **Largest Market Segment** | Small-Business (48.1% of reviews) | Enterprise (42.0% of reviews) | Small-Business (49.8% of reviews) | | **Entry Level Price** | No pricing available | $0.00 | No pricing available | --- ## Top Pros & Cons ### Balsamiq Pros: - Ease of Use (9 reviews) - Drag (5 reviews) Cons: - Limited Capabilities (3 reviews) - Learning Curve (2 reviews) ### Visio Pros: - Ease of Use (11 reviews) - Templates (6 reviews) Cons: - Expensive (5 reviews) - Learning Curve (4 reviews) ### Draw.io Pros: - Ease of Use (22 reviews) - Easy Creation (12 reviews) Cons: - Diagram Issues (4 reviews) - Feature Complexity (3 reviews) --- ## Ratings Comparison | Rating | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Meets Requirements** | 8.3 (449 reviews) | 8.8 (598 reviews) | 8.9 (383 reviews) | | **Ease of Use** | 8.9 (448 reviews) | 8.2 (604 reviews) | 8.8 (387 reviews) | | **Ease of Setup** | 9.0 (103 reviews) | 8.7 (138 reviews) | 9.2 (96 reviews) | | **Ease of Admin** | 8.6 (90 reviews) | 8.1 (107 reviews) | 8.3 (52 reviews) | | **Quality of Support** | 8.1 (250 reviews) | 8.1 (387 reviews) | 8.1 (232 reviews) | | **Has the product been a good partner in doing business?** | 8.7 (77 reviews) | 8.5 (95 reviews) | 8.4 (40 reviews) | | **Product Direction (% positive)** | 6.6 (441 reviews) | 6.7 (588 reviews) | 8.2 (373 reviews) | --- ## Pricing ### Balsamiq #### Entry-Level Pricing No pricing available #### Free Trial Yes ### Visio #### Entry-Level Pricing Plan: Free Price: $0.00 Description: A basic Visio plan is included for free as part of Microsoft 365 subscription. Key Features: - Great for viewing diagrams and minor editing​ - Coauthor, edit, add comments, and share diagrams in real time via the Visio web app or Microsoft Teams​ - Access dozens of templates and sample diagrams to create:​ Business diagrams, ​General flowcharts,​ Basic organization charts Infographic timelines​ [Browse all 3 editions](https://www.g2.com/products/visio/pricing) #### Free Trial Yes ### Draw.io #### Entry-Level Pricing No pricing available #### Free Trial No information available --- ## Features Comparison By Category ### Team Collaboration | Product | Score | Reviews | |---|---|---| | **Balsamiq** | N/A | N/A | | **Visio** | N/A | N/A | | **Draw.io** | N/A | N/A | #### Communication | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Status Updates** | Not enough data | Not enough data | Not enough data | | **Instant Messaging** | Not enough data | Not enough data | Not enough data | | **Activity Feed** | Not enough data | Not enough data | Not enough data | | **Notifications** | Not enough data | Not enough data | Not enough data | | **Comments and Voting** | Not enough data | Not enough data | Not enough data | | **Discussions** | Not enough data | Not enough data | Not enough data | | **User Directory** | Not enough data | Not enough data | Not enough data | | **Online Status of Coworkers** | Not enough data | Not enough data | Not enough data | #### Content Management | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **File Sharing** | Not enough data | Not enough data | Not enough data | | **Document Collaboration** | Not enough data | Not enough data | Not enough data | | **Version Control** | Not enough data | Not enough data | Not enough data | | **Tagging** | Not enough data | Not enough data | Not enough data | | **Knowledge Base** | Not enough data | Not enough data | Not enough data | | **Surveys** | Not enough data | Not enough data | Not enough data | #### Productivity Tools | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Task Management** | Not enough data | Not enough data | Not enough data | | **Calendar** | Not enough data | Not enough data | Not enough data | | **Search** | Not enough data | Not enough data | Not enough data | | **Mobile** | Not enough data | Not enough data | Not enough data | | **Multi-Language Support** | Not enough data | Not enough data | Not enough data | #### Administration | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Moderation** | Not enough data | Not enough data | Not enough data | | **User, Role, and Access Management** | Not enough data | Not enough data | Not enough data | | **Performance and Reliability** | Not enough data | Not enough data | Not enough data | ### Org Chart | Product | Score | Reviews | |---|---|---| | **Balsamiq** | N/A | N/A | | **Visio** | 8.5/10 | 151 | | **Draw.io** | N/A | N/A | #### Logistics | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Integration** | Not enough data | 8.4 (114 reviews) | Not enough data | | **Analytics** | Not enough data | 7.9 (99 reviews) | Not enough data | | **Export** | Not enough data | 8.3 (130 reviews) | Not enough data | | **Upload** | Not enough data | 8.2 (114 reviews) | Not enough data | | **Employee Directory** | Not enough data | 8.1 (54 reviews) | Not enough data | #### Editing & Design | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Drag-and-Drop** | Not enough data | 9.1 (143 reviews) | Not enough data | | **Update** | Not enough data | 8.7 (132 reviews) | Not enough data | | **Customize** | Not enough data | 8.8 (140 reviews) | Not enough data | | **Details** | Not enough data | 8.7 (142 reviews) | Not enough data | | **Restructure** | Not enough data | 8.6 (137 reviews) | Not enough data | #### Agentic AI - Org Chart | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Cross-system Integration** | Not enough data | Not enough data | Not enough data | | **Proactive Assistance** | Not enough data | Not enough data | Not enough data | ### Collaborative Whiteboard | Product | Score | Reviews | |---|---|---| | **Balsamiq** | N/A | N/A | | **Visio** | N/A | N/A | | **Draw.io** | N/A | N/A | #### Design Tools | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Drawing** | Not enough data | 9.0 (7 reviews) | Not enough data | | **Marker Colors** | Not enough data | 9.4 (6 reviews) | Not enough data | | **Mind Mapping** | Not enough data | 9.3 (5 reviews) | Not enough data | | **Templates** | Not enough data | 9.0 (5 reviews) | Not enough data | | **Drag-and-Drop** | Not enough data | 8.3 (5 reviews) | Not enough data | #### Communication Tools | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Voting** | Not enough data | Not enough data | Not enough data | | **Commenting** | Not enough data | Not enough data | Not enough data | #### Integrations | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **CMS Integrations** | Not enough data | Not enough data | Not enough data | | **Sharing** | Not enough data | Not enough data | Not enough data | #### Software Offering | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **In-Browser** | Not enough data | Not enough data | Not enough data | | **Desktop App** | Not enough data | Not enough data | Not enough data | | **Mobile App** | Not enough data | Not enough data | Not enough data | #### Agentic AI - Collaborative Whiteboard | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | Not enough data | | **Adaptive Learning** | Not enough data | Not enough data | Not enough data | ### Mind Mapping | Product | Score | Reviews | |---|---|---| | **Balsamiq** | N/A | N/A | | **Visio** | N/A | N/A | | **Draw.io** | N/A | N/A | #### Collaboration Tools | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Collaborative Editing** | Not enough data | 8.6 (6 reviews) | Not enough data | | **Task Management** | Not enough data | 7.8 (6 reviews) | Not enough data | | **Notes and Comments** | Not enough data | 8.9 (6 reviews) | Not enough data | #### Visual Tools | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Styles and Themes** | Not enough data | 9.4 (6 reviews) | Not enough data | | **Image Import** | Not enough data | 9.4 (6 reviews) | Not enough data | | **Custom Icons** | Not enough data | 8.3 (6 reviews) | Not enough data | #### Mind Map Availability | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **File Formats** | Not enough data | 9.4 (6 reviews) | Not enough data | | **Cloud Storage Integration** | Not enough data | 9.7 (6 reviews) | Not enough data | | **Mobile Application** | Not enough data | 6.7 (6 reviews) | Not enough data | | **Desktop Availability** | Not enough data | 9.2 (6 reviews) | Not enough data | #### Agentic AI - Mind Mapping | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | | **Decision Making** | Not enough data | Not enough data | Not enough data | ### Visual Collaboration Platforms | Product | Score | Reviews | |---|---|---| | **Balsamiq** | N/A | N/A | | **Visio** | N/A | N/A | | **Draw.io** | N/A | N/A | #### Collaboration | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Integrated Communications** | Not enough data | Not enough data | Not enough data | | **Native Communications** | Not enough data | Not enough data | Not enough data | | **Board Overview** | Not enough data | Not enough data | Not enough data | | **Screen Sharing** | Not enough data | Not enough data | Not enough data | #### Hardware | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Required Hardware** | Not enough data | Not enough data | Not enough data | | **Bring Your Own Device** | Not enough data | Not enough data | Not enough data | #### Security | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Permissions** | Not enough data | Not enough data | Not enough data | | **Single Sign-On (SSO)** | Not enough data | Not enough data | Not enough data | #### Agentic AI - Visual Collaboration Platforms | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | | **Natural Language Interaction** | Not enough data | Not enough data | Not enough data | ### Prototyping | Product | Score | Reviews | |---|---|---| | **Balsamiq** | N/A | N/A | | **Visio** | N/A | N/A | | **Draw.io** | N/A | N/A | #### Platform Basics | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Modeling Tools** | Not enough data | Not enough data | Not enough data | | **Feedback and Communication** | Not enough data | Not enough data | Not enough data | | **Framework Libraries** | Not enough data | Not enough data | Not enough data | | **Editing Tools** | Not enough data | Not enough data | Not enough data | #### Platform Additional Functionality | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Sharing Components** | Not enough data | Not enough data | Not enough data | | **Error Documentation** | Not enough data | Not enough data | Not enough data | | **User Interface Testing** | Not enough data | Not enough data | Not enough data | | **Presentation Integrations** | Not enough data | Not enough data | Not enough data | #### Agentic AI - Prototyping | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Autonomous Task Execution** | Not enough data | Not enough data | Not enough data | | **Multi-step Planning** | Not enough data | Not enough data | Not enough data | | **Cross-system Integration** | Not enough data | Not enough data | Not enough data | | **Natural Language Interaction** | Not enough data | Not enough data | Not enough data | | **Proactive Assistance** | Not enough data | Not enough data | Not enough data | ### Wireframing | Product | Score | Reviews | |---|---|---| | **Balsamiq** | 8.4/10 | 10 | | **Visio** | N/A | N/A | | **Draw.io** | N/A | N/A | #### Platform Basics | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Importing Abilities** | 8.7 (9 reviews) | Not enough data | Not enough data | | **Content Design Tools** | 8.5 (9 reviews) | Not enough data | Not enough data | | **Framework Libraries** | 8.1 (9 reviews) | Not enough data | Not enough data | | **Outlining Tools** | 8.3 (9 reviews) | Not enough data | Not enough data | | **Mockup Creations** | 8.7 (9 reviews) | Not enough data | Not enough data | #### Platform Additional Functionality | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Collaboration Software Integration** | 7.6 (7 reviews) | Not enough data | Not enough data | | **Feedback Communication** | 8.3 (7 reviews) | Not enough data | Not enough data | | **Exporting Capabilities** | 9.0 (10 reviews) | Not enough data | Not enough data | ### Software Design Platforms | Product | Score | Reviews | |---|---|---| | **Balsamiq** | N/A | N/A | | **Visio** | N/A | N/A | | **Draw.io** | N/A | N/A | #### Platform Basics | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Mockup Creations** | Not enough data | Not enough data | Not enough data | | **Outlining Tools** | Not enough data | Not enough data | Not enough data | | **Import Graphic Design Tools** | Not enough data | Not enough data | Not enough data | | **Feedback Communication** | Not enough data | Not enough data | Not enough data | | **Content Libraries** | Not enough data | Not enough data | Not enough data | | **Export Wireframes and Prototypes** | Not enough data | Not enough data | Not enough data | #### Platform Basics - Software Design Platforms | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **User Interface Testing** | Not enough data | Not enough data | Not enough data | | **Presentation Integrations** | Not enough data | Not enough data | Not enough data | | **Error Documentation** | Not enough data | Not enough data | Not enough data | | **Sharing Components** | Not enough data | Not enough data | Not enough data | #### Platform Additional Functionality | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Design and Editing Tools** | Not enough data | Not enough data | Not enough data | | **Collaboration Capabilities** | Not enough data | Not enough data | Not enough data | | **Diagramming and Collaborative Whiteboard Integrations** | Not enough data | Not enough data | Not enough data | | **Documenting Trial Errors** | Not enough data | Not enough data | Not enough data | #### Platform Additional Functionality - Software Design Platforms | Feature | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Editing Tools** | Not enough data | Not enough data | Not enough data | | **Framework Libraries** | Not enough data | Not enough data | Not enough data | | **Feedback and Communication** | Not enough data | Not enough data | Not enough data | | **Modeling Tools** | Not enough data | Not enough data | Not enough data | --- ## Categories **Unique to Balsamiq (3):** [Prototyping Software](https://www.g2.com/categories/prototyping), [Wireframing Software](https://www.g2.com/categories/wireframing), [Software Design Platforms](https://www.g2.com/categories/software-design-platforms) **Unique to Visio (6):** [Org Chart Software](https://www.g2.com/categories/org-chart), [Diagramming Software](https://www.g2.com/categories/diagramming), [Collaborative Whiteboard Software](https://www.g2.com/categories/collaborative-whiteboard), [Mind Mapping Software](https://www.g2.com/categories/mind-mapping-software), [Visual Collaboration Platforms](https://www.g2.com/categories/visual-collaboration-platforms), [Wireframing Software](https://www.g2.com/categories/wireframing) **Unique to Draw.io (1):** [Diagramming Software](https://www.g2.com/categories/diagramming) --- ## Reviewer Demographics ### By Company Size | Segment | Balsamiq | Visio | Draw.io | |---|---|---|---| | **Small-Business** | 48.1% | 25.9% | 49.8% | | **Mid-Market** | 32.8% | 32.1% | 27.2% | | **Enterprise** | 19.1% | 42.0% | 23.0% | ### By Industry #### Balsamiq - **Computer Software:** 19.7% - **Information Technology and Services:** 18.1% - **Design:** 9.7% - **Marketing and Advertising:** 7.3% - **Internet:** 6.3% - **Financial Services:** 3.4% - **Education Management:** 3.2% - **Higher Education:** 3.0% - **E-Learning:** 1.6% - **Retail:** 1.2% - **Other:** 26.4% #### Visio - **Information Technology and Services:** 9.9% - **Hospital & Health Care:** 6.3% - **Computer Software:** 5.2% - **Higher Education:** 4.5% - **Computer Networking:** 3.1% - **Electrical/Electronic Manufacturing:** 2.7% - **Management Consulting:** 2.7% - **Design:** 2.2% - **Financial Services:** 2.2% - **Chemicals:** 2.2% - **Other:** 58.9% #### Draw.io - **Computer Software:** 16.2% - **Information Technology and Services:** 15.5% - **Design:** 5.1% - **Higher Education:** 3.7% - **Education Management:** 3.5% - **Internet:** 3.5% - **Marketing and Advertising:** 3.0% - **Telecommunications:** 2.5% - **Leisure, Travel & Tourism:** 2.5% - **Financial Services:** 2.3% - **Other:** 42.3% --- ## Alternatives ### Alternatives to Balsamiq - [Figma](https://www.g2.com/products/figma/reviews) — 4.7/5 stars (1546 reviews) - [Sketch](https://www.g2.com/products/sketch/reviews) — 4.5/5 stars (1226 reviews) - [InVision](https://www.g2.com/products/invision/reviews) — 4.4/5 stars (683 reviews) - [Moqups](https://www.g2.com/products/moqups/reviews) — 4.2/5 stars (91 reviews) - [Miro](https://www.g2.com/products/miro/reviews) — 4.6/5 stars (13079 reviews) - [Marvel](https://www.g2.com/products/marvel/reviews) — 4.4/5 stars (227 reviews) - [Justinmind](https://www.g2.com/products/justinmind/reviews) — 4.0/5 stars (55 reviews) - [Lucid Visual Collaboration Suite](https://www.g2.com/products/lucid-software-inc-lucid-visual-collaboration-suite/reviews) — 4.5/5 stars (8642 reviews) - [Adobe XD](https://www.g2.com/products/adobe-xd/reviews) — 4.3/5 stars (511 reviews) - [Axure RP](https://www.g2.com/products/axure-rp/reviews) — 4.2/5 stars (277 reviews) ### Alternatives to Visio - [Miro](https://www.g2.com/products/miro/reviews) — 4.6/5 stars (13079 reviews) - [Lucid Visual Collaboration Suite](https://www.g2.com/products/lucid-software-inc-lucid-visual-collaboration-suite/reviews) — 4.5/5 stars (8642 reviews) - [Mural](https://www.g2.com/products/mural/reviews) — 4.6/5 stars (1459 reviews) - [SmartDraw](https://www.g2.com/products/smartdraw/reviews) — 4.5/5 stars (383 reviews) - [Creately](https://www.g2.com/products/creately/reviews) — 4.4/5 stars (1389 reviews) - [Gliffy](https://www.g2.com/products/gliffy/reviews) — 4.4/5 stars (222 reviews) - [Sketch](https://www.g2.com/products/sketch/reviews) — 4.5/5 stars (1226 reviews) - [Whimsical](https://www.g2.com/products/whimsical/reviews) — 4.6/5 stars (189 reviews) - [FigJam](https://www.g2.com/products/fig-jam/reviews) — 4.6/5 stars (462 reviews) - [Figma](https://www.g2.com/products/figma/reviews) — 4.7/5 stars (1546 reviews) ### Alternatives to Draw.io - [Miro](https://www.g2.com/products/miro/reviews) — 4.6/5 stars (13079 reviews) - [Lucid Visual Collaboration Suite](https://www.g2.com/products/lucid-software-inc-lucid-visual-collaboration-suite/reviews) — 4.5/5 stars (8642 reviews) - [Mural](https://www.g2.com/products/mural/reviews) — 4.6/5 stars (1459 reviews) - [Creately](https://www.g2.com/products/creately/reviews) — 4.4/5 stars (1389 reviews) - [Sketch](https://www.g2.com/products/sketch/reviews) — 4.5/5 stars (1226 reviews) - [SmartDraw](https://www.g2.com/products/smartdraw/reviews) — 4.5/5 stars (383 reviews) - [Cacoo](https://www.g2.com/products/cacoo/reviews) — 4.5/5 stars (233 reviews) - [Gliffy](https://www.g2.com/products/gliffy/reviews) — 4.4/5 stars (222 reviews) - [Whimsical](https://www.g2.com/products/whimsical/reviews) — 4.6/5 stars (189 reviews) - [Wondershare EdrawMax](https://www.g2.com/products/wondershare-edrawmax/reviews) — 4.5/5 stars (140 reviews) --- ## Top Discussions ### Balsamiq - Title: [What is balsamiq software?](https://www.g2.com/discussions/what-is-balsamiq-software) — 2 comments > **Top comment:** "Balsamiq makes software like Mockups and Wireframes. The software tools provide a way to create simple wire-frame style mockup sketches without distractions..." - Title: [Is it possible to create a prototype out of the mock-up, I mean, is it possible to a clickable version of the mock-up that allows me to go from one view to another?](https://www.g2.com/discussions/28907-is-it-possible-to-create-a-prototype-out-of-the-mock-up-i-mean-is-it-possible-to-a-clickable-version-of-the-mock-up-that-allows-me-to-go-from-one-view-to-another) — 1 comment > **Top comment:** "Yes, you can, when you click on a component on the right side you find something called "link", you can then link it to the page you want. The "clickable..." ### Visio - Title: [What is most interesting thing you like on Visio?](https://www.g2.com/discussions/what-is-most-interesting-thing-you-like-on-visio) — 4 comments, 1 upvote > **Top comment:** "That depends what are you trying to do. In my opinion. the ability to draw different types of diagrams using forms libraries, either built-in or that you can..." - Title: [Can I use this software for drawing diagrams easily?](https://www.g2.com/discussions/can-i-use-this-software-for-drawing-diagrams-easily) — 3 comments, 1 upvote > **Top comment:** "For sure, yes" - Title: [Is Visio better than PowerPoint?](https://www.g2.com/discussions/is-visio-better-than-powerpoint) — 2 comments > **Top comment:** "PowerPoint And Visio are two different products." - Title: [Is Visio free with Office 365?](https://www.g2.com/discussions/is-visio-free-with-office-365) — 2 comments > **Top comment:** "No, it is separate license and it is not cheap. " - Title: [Is there any option (search engine) available in software, where I can import shapes from Internet?](https://www.g2.com/discussions/is-there-any-option-search-engine-available-in-software-where-i-can-import-shapes-from-internet) — 2 comments, 1 upvote > **Top comment:** "On the Insert tab, click Pictures or Online Pictures. Browse to the location of the file that you want to insert, select the file, and then click Open . Tip:..." ### Draw.io - Title: [Can I trust draw io?](https://www.g2.com/discussions/can-i-trust-draw-io) — 2 comments > **Top comment:** "yes! For sure it is a brilliant application for drawing and making various diagrams and flowcharts." - Title: [Could the concurrence of people working on the same diagram be implemented?](https://www.g2.com/discussions/could-the-concurrence-of-people-working-on-the-same-diagram-be-implemented) — 2 comments, 1 upvote > **Top comment:** "Yes, It is workable by your entire team" - Title: [Do you plan to create a offline tool?](https://www.g2.com/discussions/do-you-plan-to-create-a-offline-tool) — 2 comments, 1 upvote > **Top comment:** "Happy to say this already exists. From the "Help" menu, "Download draw.io Desktop..."" - Title: [Some time it automaticaly stoped responding even it is connected to network.](https://www.g2.com/discussions/12756-some-time-it-automaticaly-stoped-responding-even-it-is-connected-to-network) — 2 comments, 1 upvote > **Top comment:** "Hi, On the upper part where says "Help" there is an option to turn on the "Work Offline" option, when you clic it explains how to use the offline..." - Title: [What is Draw.io used for?](https://www.g2.com/discussions/what-is-draw-io-used-for) — 1 comment > **Top comment:** "Diagramming and whiteboarding" --- **Source:** [G2.com](https://www.g2.com) | [Comparison Page](https://www.g2.com/compare/balsamiq-vs-visio-vs-draw-io)