When comparing Balsamiq vs Inkscape, the Slant community recommends Inkscape for most people. In the question“What are the best tools for webapp UX/UI prototyping?” Inkscape is ranked 9th while Balsamiq is ranked 11th. The most important reason people chose Inkscape is:
Inkscape is GPL-licensed and maintains public repositories.
Specs
Ranked in these QuestionsQuestion Ranking
Pros
Pro Low-fidelity UI elements
All the Balsamiq UI elements are drawn by hand and have a really nice low-fidelity design.
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 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.
Pro Free and open source
Inkscape is GPL-licensed and maintains public repositories.
Pro Opens lots of file types
Inkscape supports many common formats for import (including SVG, Photoshop and Illustrator) and its plugin architecture allows more to be added.
Pro Export to different file types
Files can be exported and saved as a "normal" svg, png, jpg, bmp etc. file.
Pro Cross-platform
Pre-built binaries are available for Windows, Mac and Linux. Inkscape can be built from source on additional platforms.
Pro Integrates well into a X11-System
Its uses the X11 icon theme and desktop theme(GTK).
Pro It can do anything
A very powerful software that can do pretty match anything!
Pro Measurement Tool
This tool is extremely handy and can not be found in any other vector graphics programs out there.
Pro Live Path Effects
Extremely powerful menu that offers more than 30 powerful Live Path Effects to apply to paths vastly enhancing the application functionality.
Pro Guides, Grids, and Canvas Rotation
Extremely handy features when building complex graphics using Inkscape.
Pro Dark Theme Support
The new 1.0 beta 2 version finally got support for dark theme which normally is only available for commercial software like Affinity Serif, Adobe Illustrator.
Pro The new version 1.1 is looks and feels fantastic
Inskape got UI update: new dockable dialogs.
Pro Interface is available in 29 languages
Basque, British English, Brazilian, Portuguese, Catalan, Croatian, Czech, Dutch, Finnish, French, German, Greek, Hindi, Hungarian, Icelandic, Indonesian, Italian, Korean, Latvian, Norwegian (Bokmål), Polish, Romanian, Russian, Slovak, Spanish, Swedish, Turkish, Ukrainian, Urdu, Swedish.
Pro It's really easy and fun
Vector graphics can be created and edited with Inkscape.
Cons
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 Very slow startup on some systems
Depending on factors like how many fonts you have installed, Inkscape can take upwards of 30 seconds to launch.
Con Uses its own SVG-format by default
Inkscape might use SVG as its default format, however this SVG's contains some additional SodiPodi/Inkscape additions that can be troublesome if you want to import the SVG into some other application.
Con 1.0 is sluggish
Inkscape 1.0 uses GTK 3 which is sluggish and slow for low spec systems( eg. ARM, Celeron, Pentium, Core-i3, Ryzen 3 or Athlon ) compared to previous versions.
Con Buggy
Application is often buggy so it happens from time to time that the popup / right-click menu won't close and stays open. It crashes also sometimes randomly. This makes it almost unusable for productive / business use.
Con Crashes very often
Inkscape encountered an internal error and will close now - is one of its standard messages.
Con Since 0.91 the gradient editor is gone
It is now only possible to edit a gradient on screen. but you can't set a stop to a specific percentage anymore.
Con Limited work with ICC CMYK color scheme
Support for ICC color profiles only in SVG files.
Con Uses GTK
It looks an feels like an alien. It also uses now touch-based widgets instead of professional widgets.
Con Y-axis inverted
0,0 coordinates begin in lower left corner, not upper left corner as SVG standards define in Inkscape 0.92.x.
It seems this is now fixed in the 1.0 beta 2 version of the program.
Con A toy for facebook-ist enthusiasts, not for professionals
It's a Linux niche mumbo-jumbo, same as GIMP for raster edit .
Con Based on the GTK widget toolkit
Software is based on GTK, so it might not integrate well in non-GTK environments. It also requires many dependencies on those non-GTK desktops. It also adds dependencies to GTK-environments since it is written in C++ which requires the gtkmm wrapper/interface.
Con Mac version does not look as polished as its versions for Windows/Linux version for the 0.92.x version
It seems that Inkscape 1.0 beta 2 for Mac got some needed attention and it looks a lot better with dark theme support. native DMG installer and they got rid of X11 which is great.
Con Incompatible with previous versions
Sometimes backward compatibility breaks. For example, pre 0.92 SVGs are incompatible with later releases (due different default resolutions).
Con No support for large printing machine system
No support for large printing machine environment, except exporting the resulting artwork to PDF.
Con Under GNU GPL
It is released under GNU GPL which one of the restricted open source license.