When comparing Kanban Tool vs Dropbox, the Slant community recommends Dropbox for most people. In the question“What are the best feature tracking/planning tools for small development teams?” Dropbox is ranked 12th while Kanban Tool is ranked 19th. The most important reason people chose Dropbox is:
You can use Dropbox via website, by installing a desktop client that creates a folder that you simply drag and drop files into, or with their mobile app. Everything synchronizes across all devices used and cloud storage. And Dropbox offers easy methods of sharing whatever is within it.
Specs
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Pros
Pro Intuitive
You will probably figure out how it works in a couple of minutes.
Pro Time tracking reports
Great and seamless time tracking with best time tracking reports.
Pro Customizable and reassuring
Thanks to the visualization of work, it's much easier to see the progress of work. Boosts the confidence in what you endeavour upon and reassures each step of the process. The customization allows to fit a system right to the process you've planned, so that we don't have to match our work to an external way, but build our own.
Pro Good number of integrations
Kanban Tool integrates with: Zapier, WeWiredWeb, Dropbox, Google Drive, SkyDrive, Box, Google calendar, iCal, Outlook, flexible and well-documented API for external systems integration, RSS feeds for boards, Chrome extension for adding tasks, JIRA® integration (Chrome extension - Kanbanira), adding tasks and comments from email, export/import Excel/CSV.
Pro Simple customization
Kanban Tool provides a collection of power-ups that allow you to customize it to meet your needs. Especially, "Developer tools" are worth mentioning. With this power-up you can add custom scripts and stylesheets to your board.
Pro Scalable
No matter how big a team you work in, kanban tool fits nicely. Thanks to the ability to customize the boards, it's easy to match a board to the size of the process. The kanban tool has been growing with our process for the past 3 years, we started with 3 people and 2 boards, now we have 24 employees and 16 main boards with several process steps each and the system works just as well.
Pro User friendly interface
Pro Work statistics
You can clearly see on a graph how much of planned work have you done already. It's very motivating.
Pro Pleasant design
Pro Swimlanes and customization
You can very easily adjust the board layout to suit your needs and even add swimlanes to have all projects on the same Kanban board.
Pro On-site version available
Pro iOS app coming soon
Just been told by the Support Team there will be an iOS app soon.
Pro Easy to use
You can use Dropbox via website, by installing a desktop client that creates a folder that you simply drag and drop files into, or with their mobile app. Everything synchronizes across all devices used and cloud storage. And Dropbox offers easy methods of sharing whatever is within it.
Pro Cross-platform desktop and mobile
Dropbox is available on iOS, Android, BlackBerry, Windows, OS X and Linux. By having a client for so many OS's pretty much anyone is covered no matter what kind of device or OS they are using.
Pro Allows sharing a folder
Using a desktop client: right click on the folder you want to share and select Dropbox > Share This Folder, then enter the e-mail addressees of people you want to share the folder with.
Pro Smart updates to big files
If a small portion of the file is changed it sends/receives only the differences (not the whole file), which is fast and bandwidth-efficient.
Pro Allows sharing a single file via link
Whether using desktop client or web interface, simply right click on the file you want to share and select Dropbox > Share link, then send the link to the people you want to share the file with. The recipient does not require a Dropbox account.
Pro Up to 18GB of free storage space
Dropbox personal accounts start out free, with 2GB of space, but users can get extra space by recommending the site to friends, or taking part in events like "Dropquest", where users can win extra space by solving puzzles.

Pro Linux support
Dropbox offers native Linux support, integrates with Nautilus file manager.
Pro Reliable
Pro Desktop client has no file size limit
As long as you have enough storage available, you can upload files of any size using Dropbox desktop client.
Pro Folders can be downloaded compressed to save bandwidth
To save bandwidth and download speed you can choose to compress a folder into a zip archive for download.
Pro Adjustable bandwidth use
To not slow down the network or save traffic you can limit the upload and download speeds of Dropbox.
Pro Lots of addons and integrations
There are official and third-party Dropbox add-ons that extend the functionality of the service and add ease of use of existing features.
Additionally, Dropbox can be integrated with existing applications to bring its functionality to other apps.
Pro 30-day version control
Dropbox keeps deleted and earlier versions of files for a month.
Pro Instant disaster recovery
Your files always synced online means instant disaster recovery. When your hard drive becomes unbootable, pick up another laptop and just carry on with your life from where you last saved.
Pro Available free storage can be increased with referrals
You get extra free space for you and your friend if they sign up.
Pro Fast sync speed
Cons
Con Not immediately self-hostable
To self-host, your server needs to have 10 or more users, and prices on self-hosting are not disclosed.
Con Search could be better
Search is not reliable.
Con Non libre/open source (propietary)
Con Too little free space
There is just too little of free space available comparing to the competition.

Con Not secure
They don't apply end-to-end encryption, files are visible to admins, governments, etc..
Con No privacy
Extensive collecting and distribution of user data to commercial third parties.
Con Consumes a lot of CPU resources when syncing many files
Con All-or-nothing (non-selective) upload
Uploading generated contents (cache, compiled code, etc.) is prone to conflicts, wastes bandwidth and free space.
Con Low bandwidth
Con Dropbox keeps deleting features, chasing customers away
For instance, all photo albums got deleted. It used to be very easy to share a couple og photos, now it's PAINFUL and must be done file by file.
Con Nocive development model
Takes a lot of decisions that usually damage community, from deleting features to making impossible to use with other filesystems than ext4 because they decided without a plausible reason (they said it was about xattrs, but all modern linux filesystems supports xattrs, so it's bs.)(they remove this later, but it's too late).
Con Problems when synching between Linux and Windows devices (unconfirmed)
This summer I lost thousands of files due to this problem on older projects which subsequently needed revising and had to be rebuilt as tons of the source was gone.
Con Restricted only to 3 devices for FREE accounts
Recently dropbox decreased the number of linked devices to 3, so you can't have more than 3 linked devices. This is problematic if you use Dropbox to sync between your computers.
Con Can unintentionally delete your files if you reinstall your OS without closing Dropbox
If you reinstall the operation system for your PC and you do not close Dropbox, it will delete all files.
