When comparing Balsamiq vs GRAVIT, the Slant community recommends GRAVIT for most people. In the question“What are the best tools for webapp UX/UI prototyping?” GRAVIT is ranked 4th while Balsamiq is ranked 5th. The most important reason people chose GRAVIT is:
Gravit is completely free to use. It was open source up until a recent release, however there are plans to open source it again in the future.
Ranked in these QuestionsQuestion Ranking
Pro Clean and easy to use interface
Balsamiq has a very easy to use drag and drop interface that lets you quickly build and adjust your mockups. The UI is centered around low-fidelity wireframes that help focus the reviews on the core layout and functionality instead of getting hung-up on visual design.
Pro Large & extensible UI element library
Balsamiq has a built in library of over 75 built-in user interface components and 187 icons, as well as community generated plug-ins.
Pro Low-fidelity UI elements
All the Balsamiq UI elements are drawn by hand and have a really nice low-fidelity design.
Pro Awesome team collaboration features
myBalsamiq has been built with teams in mind and has a variety of featured to support collaborating on the mockups:
Notifications - Real-time notifications to enable you to keep track of team member actions
Revision Control - All mockups have a revision history to enable reverting to previous versions and keeping track of design decisions.
Skype Integration - Easy to use Skype integration to host design reviews.
Access Control - Access controls allow sharing projects with team members as well as allowing external reviewers to leave comments on the designs.
Pro Usability testing features
You can link together pages to create shareable user demos
Pro 30-day trial available
Pro Keyboard shortcuts
You can use common keyboard shortcuts like Shift to select multiple elements or to resize while maintaing proportions, F2 for renaming labels etc.
Gravit is completely free to use.
It was open source up until a recent release, however there are plans to open source it again in the future.
Pro Multi platform
Works on Windows, Mac and Linux.
Pro Actively developed
Pro Has almost all of the features of more expensive applications
Has comparable features with applications that normally cost a monthly fee.
Pro Symbols and libraries
With Gravit you can re-use the same design for buttons, inputs, etc, in multiple places, with changes synced every where the element is used. It's also possible to set text to a shared style to sync text changes throughout the app.
Pro Clean and helpful UI
The panels in Gravit adjust to contain the information needed based on the type of element selected, preventing the clutter that Photoshop often experiences.
Pro Easy to design multiple pages
The ability to assign layers to specific pages, and view single or multiple pages at once makes it easy to design an entire website without getting lost in thousands of layers. Easy to view multiple pages at one time.
Pro Easy to export all assets
Gravit has a built in exporter to PDF, JPG, PNG and SVG.
Pro Able to open Sketch files
The ability to open Sketch files makes it easier for Linux/Windows users to collaborate with people who use Sketch, which is macOS specific.
Con Stifling innovation
Doing anything that is not directly supported by Balsamiq's conservative component library is next to impossible. User is forced to think within the corset of yesterday's standards.
Con No easy way to quickly play with the product
Con Changing rapidly
The fast rate of growth/change for Gravit can be a pro in that in means plenty of new features.
However, it also makes the product fairly unpredictable.
For example: In the past year, Gravit was open sourced, then closed sourced again.
Con This does not appear to be a Web-design tool
Gravit appears to be a vector-art tool, and nothing more. Their homepage doesn't even mention Web design as far as I can see.