Cloud storage shoot-out: Google Drive vs. Dropbox vs. SkyDrive vs. Box

cloud storageThe cloud storage war is heating up. Dropbox is getting more and more competition, and now Google has joined the fray with Google Drive. We’re not going to compare features in this article, but rather test something we can actually measure. And since we here at Pingdom do site monitoring we have focused on how these services compare in terms of performance and reliability.

To make this survey even more interesting, we also added two other file hosting services: Microsoft’s SkyDrive and They should give us some additional perspective.

To monitor reliability and performance, in this specific case we thought their homepages were less important than the actual file hosting they offer, so that is what we focused on. We uploaded the same identical file to the four services, a small PNG image, and made it publicly available so we could monitor it.

Service reliability

First we should get the reliability question out of the way. Our monitoring indicates that all of these services offer great availability, with some minor differences.

During the 30 days of this survey, the only service that had zero downtime was However, Google Drive was very close to getting a perfect score here as well, with just 1 minute of downtime. This means that both had 100.00% uptime (that minute for Google is too short a time period to show up unless you add more decimal points). and Google Drive should be applauded for having no or close to no downtime over the time period of this survey.

Dropbox had a perfect record until the very last day of this survey (yesterday) when it had a single 13-minute outage, reporting the service unavailable when we accessed the file. That still puts it at a very respectable 99.97% uptime. You could say that bad timing kept Dropbox from getting a perfect score in this survey.

Microsoft’s SkyDrive was having some issues at the beginning of this survey, with multiple short outages of 1-2 minutes each. This was also noticeable from a performance standpoint, which you can read more about further down in this article. That said, with just a total of 15 minutes of downtime it can hardly be called a disaster. When rounded off, this puts SkyDrive at 99.97% uptime.

So, in short, over 30 days this is the score in terms of file availability:

  1. – No downtime, 100.00% uptime
  2. Google Drive – 1 minute of downtime, 100.00% uptime
  3. Dropbox – 13 minutes of downtime, 99.97% uptime
  4. SkyDrive – 15 minutes of downtime, 99.97% uptime

In our opinion, the amount of downtime we saw was fully acceptable. No service will have perfect availability in the long run. The important thing is that outages are dealt with swiftly and don’t happen too often.

Tests were performed once per minute, and downtime was always verified from two different monitoring locations to avoid false positives (the Pingdom monitoring service does this automagically).


It could be argued that since files hosted on these services aren’t really meant for performance-sensitive resources, only sharing, performance isn’t as important here as reliability. We think both matters, for the simple reason of user convenience, for the same reason we prefer a fast website to a slow one.

The URL we monitored was the one you get from the various services for publicly accessing a file. Worth noting is that Google Drive, SkyDrive and all add a small wrapper page to a shared file, which of course adds a bit of overhead to load times.

online storage performance
Larger version of the chart.

We started the survey before Dropbox announced its decision to drop support for public folders for new accounts, instead adopting an approach more similar that used by Google Drive et al. This survey used Dropbox’s Public Folders feature, so it’s quite possible that shared files will have some additional overhead above what you see here, but we haven’t had time to test that yet.

So who wins this? Google Drive and Dropbox are clearly pretty close, and don’t forget that Google also includes that wrapper page for the file so that’s a certain amount of overhead. They both offer significantly better performance than both SkyDrive and here.

An interesting trend is that all of these services, to different extents, have better performance when accessed from locations in North America compared to Europe. Google has the most geographically even service in terms of performance, with Dropbox a close second.

An additional note about SkyDrive

SkyDrive was clearly having some issues when we started this survey, which affected its performance results in this survey. That is also when it clocked in the downtime we detected. You can clearly see how performance changed over the course of this survey.

SkyDrive Response Time

Shown above is the load time of the image and its wrapper page on SkyDrive. The graph is from the My Pingdom control panel.

Final words, and a verdict

It’s interesting to note how many cloud storage services there are out there, and so many that provide storage for free (all four in this survey do this). There clearly isn’t a lack of options.

That said, Dropbox has a huge fan base, and not without reason. We use Dropbox extensively here at Pingdom for various purposes, and think it’s a great tool which offers a very good user experience.

However, this survey was all about numbers. To answer the initial question, what happens when you compare the performance and reliability of Dropbox and Google Drive? The answer is that they are close enough that the differences don’t really matter in this case. Use the one you think gives you the best user experience. Or why not use both?

Top right image via Shutterstock.


  1. Thanks guys for yet another excellent post.

    This one came with perfect timing for me since I have been looking into cloud storage solutions on account of my agency (25 users) lately. It pretty quickly came down to Dropbox and Box being the only serious contenders, with regards to the hilarious user agreement that Google tries to sell us and the fact that we have had some problems previously in getting Microsoft’s other cloud services to work flawlessly on Macs.

    The stats regarding performance was interesting and confirmed my own findings – Box is a lot slower than Dropbox in Europe (I did just basic stopwatch tests with all kinds of file sizes from our own offices). I’m still impressed with some of the more “enterprise” features that you get from Box but the slow performance and higher price (I compared their Business plan with Dropbox for teams) combined with less helpful sales staff has me leaning towards Dropbox.

    If anyone out there have made their own benchmarking and came to a conclusion I would love to have some end user input – please get in touch.

    Thanks Pingdom and enjoy midsummer!

    1.  @stridell We ‏@IglooSoftware also offer a cloud storage in a document management/file solution.  We are actually a Social Enterprise Solution.  Jive/Yammer/ all rolled into one solution at the price point of a account.
      We have microblogs, forums, wiki’s, gameification, SSO integration and a ton of other abilities.
      I can tell you once in the past 1yr we have been below 99.9% uptime which was in April2012.  This was due to the data center we are using (Savvis) having a power outage in their Toronto site.
      If your interested you can just sign up for a 30day trial and see how it suites you.

  2. The Dropbox API is the main reason why I stick with Dropbox. I have no experience from other APIs though. Please tell me, if someone knows even better API.

  3. @pluscloud @MartijnSnels alleen jammer dat hun voorwaarden de slechtste zijn van de 3 grote aanbieders #dagbedrijfsgeheim

  4. > Google Drive – 1 minute of downtime, 100.00% uptime
    any kind of downtime jump the 100% uptime… i learnt this when i am 6 years old….

    1. @vivilproject well 1 minute downtime in 30 days is uptime of 99.9652% so rounding off to 2 decimals will give it 100%. Don’t see any issue here.

    2. @vivilproject Actuall all calculations are wrong based on 30 days. For Google Drive it should be 99.97%, while for for SkyDrive its 99.47% and for box its 99.55%.

  5. @pingdom @adrianco Aren’t all of them terrible? The fastest downloaded at 200 Kilobits/sec. Try test using a larger file, eg 4MB file

  6. @pingdom @adrianco Also, isn’t upload (write) speed important; eg you have camera fulll of vacation pics to post. Write speed can be << read

  7. Why is no one comparing the Business option from Box? It’s $15/month for 1000GB! No one else even compares to this!! I don’t see any other options for me but Box. I have Box, Dropbox and Drive all on my IPhone. All, look, work and feel pretty much the same now a days. All 3 have a dedicated folder on my Macbook pro, all 3 sync perfectly. I can drag and drop from all 3. It came down to pricing for me. If you compare the basic consumer pricing, then I could see Drive being the winner. I get up to 16GB free on dropbox, so that’s good for people who don’t want to pay anything. But, what about someone who just wants more storage and a lot of it? For what I’m trying to store, I need no less than 500-800GB. Only option is the Box business account for 1 user. $15/mth for 1000GB (I pray they mean 1TB and this isn’t a typo). 

  8. The downtimes are wrong based on 30 days data. It should be 99.97% for Google Drive, 99.55% for dropbox and 99.48% for skydrive

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