Like most things, choosing where to host your company blog is a strategic choice that can't be boiled down to a categorical.
tumblr has a really amazing community. tumblr's downtime is a fact. The question is, does the community outweigh the downtime?
I think you make this decision based on the demographics of the tumblr community vis-a-vis your users / customers. And tumblr isn't just 14 year old girls -- there's a bunch of tech people on it (although that may be more NYC tech).
In the comments, people have mentioned the simple fact that you can have both a self-hosted company blog and a company tumblr, much like most companies have a company blog and a company twitter. I agree, although simply feeding content from the blog into the tumblr of course doesn't make best use of tumblr as a platform.
My startup's blog is on tumblr (http://blog.idonethis.com) and we get about 1/5 of the referral traffic of twitter and facebook from tumblr. (We have nearly 1k followers on tumblr versus 1.6k twitter followers and 2k facebook likes.) In other words, it's our 3rd largest source of referral traffic from social media.
Well put. I do marketing work on a few projects that have commercial blogs. In mose cases, we're able to get 1K+ Tumblr followers in < 3 months (not counting "regular" RSS subscribers). (And none of the projects are famous/have famous founders/services/products) To get the same amount of regular RSS subscribers is much more difficult.
Tumblr is comparable to Twitter in that it's a common place to meet your readers/customers. Unlike a self-hosted blog, you don't have to ask visitors to leave where they are to visit you. So you're likely to get a bit more foot traffic/interaction, not to mention people passing it on/sharing it out (via reblogs).
Now if you're an already established service/otherwise famous, you might have no problem getting people to check you out. But even then, Tumblr has its benefits.
I don't think the choice is necessarily all or nothing between self-hosted or Tumblr. Many companies with "real" blogs also have Tumblrs. In many cases companies have multiple Tumblrs. (Not unlike Twitter, it's becoming common to have a separate Tumblr for different events/products/branches/divisions. IBM has at least 3. NBC has at least 4...)
I won't disagree that Tumblr has horrible performance issues. But it's still worth it. Twitter 3 years ago had bad performance issues, but it was/is still definitely investing in. No social site is forever, but they're great tools as long as you're aware of costs + benefits.
tumblr has a really amazing community. tumblr's downtime is a fact. The question is, does the community outweigh the downtime?
I think you make this decision based on the demographics of the tumblr community vis-a-vis your users / customers. And tumblr isn't just 14 year old girls -- there's a bunch of tech people on it (although that may be more NYC tech).
In the comments, people have mentioned the simple fact that you can have both a self-hosted company blog and a company tumblr, much like most companies have a company blog and a company twitter. I agree, although simply feeding content from the blog into the tumblr of course doesn't make best use of tumblr as a platform.
My startup's blog is on tumblr (http://blog.idonethis.com) and we get about 1/5 of the referral traffic of twitter and facebook from tumblr. (We have nearly 1k followers on tumblr versus 1.6k twitter followers and 2k facebook likes.) In other words, it's our 3rd largest source of referral traffic from social media.