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migrated from stackoverflow.com Sep 16 '09 at 8:48

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You can always make your question community owned and the downvotes won't hurt your rep at all. :) –  ベレアー アダム Oct 10 '08 at 12:47
Joel Spolsky has posted ... that should be pretty definitive. –  Steve Moyer Feb 23 '09 at 0:40
I really don't think you need permission to use the logo in a blog posting about the site. Do you need permission from Wal-Mart to write a blog entry about them and use their logo illustrating it? Even if you vandalize the logo, it's protected speech and fair use. –  Jeff Atwood Feb 23 '09 at 15:26
@Jeff: I'm not sure but I believe you would need need permission from Wal-Mart to use their logo regardless of wether what you say is positive or negative... –  The Unhandled Exception May 21 '10 at 14:47

6 Answers 6

It is a trademark. The purpose of trademark law is to prevent consumers from being misled as to the origin of a product. So if you were making a product, and you used the name Stack Overflow or the Stack Overflow logo in your product or its advertising, in such a way that would mislead some consumers into thinking that your product was Stack Overflow, you would be violating the trademark and this would not be legal.

For example if you started a website called "Stack Overflow News" and used the logo, that would create confusion... people might think that the site was a part of Stack Overflow or was officially endorsed in some way. If enough people were reasonably confused as to the origin of your site, it's a violation.

The logo image itself is copyright. Copyright is different than trademark. Ordinarily you couldn't copy it. But if you were writing a news story or blog post about Stack Overflow, reproducing the image would almost certainly be considered "fair use" and thus permissible.

If you were writing a blog post, say, about Stack Overflow, for example, and the blog post was a description of the site, maybe a review, and there was no possibility that anyone reading that blog post would think that in some way YOU were Stack Overflow, then using the logo would be fair use under copyright law, and allowed under trademark law because you were not using it "in trade."

Trademark law is a lot more complicated than that, so you'd have to consult with a real lawyer if you thought you were doing something iffy.

See also our Stack Exchange Logos page and Trademark Guidance page.

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I can't find any trademark claim anywhere on the site; Jeff needs to fix that ASAP. –  derobert Feb 21 '09 at 19:39
he doesn't need to. If SO is a LLC (ie a proper company, and I'd expect J and J to have set it up like that), they get it automatically - you can't also call your company SO without passing off. But if you use the logo in an article ABOUT SO, thats usually fine..... –  Nic Wise Feb 22 '09 at 20:23
... but use the logo (or part of it) for a development site - no way. Now, it gets murkey if you started a company called SO, but it was NOT in the software space at all. Then people MAY not be confused about which is which etc. –  Nic Wise Feb 22 '09 at 20:24
I'll add that even if you do something that could be technically legal, and a trademark or copyright owner might disagree and still try to take you to court over it with no repercussion aside from their own legal costs. Defending yourself can be expensive, so you have to be very careful. –  Joel Coehoorn Mar 20 '09 at 15:21
@JoelCoehoorn: But given that it's Joel Spolsky who said this, it seems unlikely that Stack Exchange would get very far in any attempt to sue a blogger for using one of their logos in a review. –  SamB Feb 3 '12 at 7:03

There is a creative commons link on the bottom of every page, but it's unclear whether that covers all content or only question/answer content. For lack of a clearer definition, you can probably get away with using the "all content" definition (pending remarks from Jeff Atwood or Joel Spolsky, of course). Also, even if the site founders intend the logo to also have a CC license, the graphics designer they hired to create it may still have a say in that.

Finally, the CC license would only cover copyright. The logo is being additionally used as a trademark, and while it's not registered (at least, they don't use the little ® symbol), you could still have issues just throwing it anywhere.

As long as you don't do anything that could cause 'consumer confusion' — where a someone might accidentally think some service provided by you is in fact provided by StackOverflow — you ought to be okay in that regard.

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Caveat: I am not a lawyer.

Common sense says: without explicit permission, don't do it - the logo is intellectual property that does not belong to you. Using it implicitly implies affiliation with and/or endorsement by Stack Overflow, which you do not have. Using it without permission invites a lawsuit. Whether the logo is trademarked or not is irrelevant. Would you use IBM's logo on your web page without their permission? Of course not. The same applies to any other business.

Best advice: follow Jeff and Joel on Twitter and just ask them for permission.

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I'd just go ahead and use it. If you are blogging about this site I think it is fair game given the CC thing and lack of TM or R logos. If they have a problem with it they can contact you.

Given that you plan on using it to link/post about SO then it is probably appropriate.

I'd probably put something int he post about the logo being the property of SO or taken from SO. (Can't say it is registered TM because I don't think it is)

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You might want to consider asking the people behind team@stackoverflow.com (Click the 'contact us' link at the very bottom of the site

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OK, so my comment on Joel's post got long, so here it is as an answer :)


OK, so you are writing an article about Stack Overflow. You are not in any way claiming to BE Stack Overflow, just writing about it. Then I would say you are good - there is nothing that can OR should be done against you by Stack Overflow Ltd. It's the same as if you write about Microsoft, you can use their logo, for example, as an illustration to go with the article.

I'm not sure on the legalities about having to file for TM protection, but general use says you are good - the same as general use (or whatever the legal term is) says that Stack Overflow Ltd have the rights to their own logo, even if they haven't officially (tm)'ed it.

Now, if you were using it as the logo for your blog or company, then: hell no. Even if your Stack Overflow Ltd was involved in something like paper stacking machines, it's still a confusion for a customer - just think about Apple Computer vs Apple Corps (the Beatles recording company) or iPhone (Apple) vs iPhone (Cisco). Both of these were settled in and then out of court. I think Apple lost (that is, had to pay) both, and it cost them a few million. Also, why is the Apple TV called Apple TV, and not iTV? Google "eye TV" from Elgato, which is an Mac-only TV tuner....*

So yeah - if you have a blog post about Stack Overflow, and want to put the Stack Overflow image inside the post: I can't see how Stack Overflow Ltd (ie, J and J and G and .... damn it, what's the other guy(s) names?) would have a reason to do anything "to" you. Even if your blog post said "Stack Overflow sucks munkeys, d00d". Are you legally allowed to do it? I'd say so, tho IANAL, and the worst that would happen is you'd get an email from J and J asking you to remove it.

I would try to use the image as-is if you can, BUT if you can find just the logo anywhere (it's in the favicon for example) then they have used that on it's own, so it's logical that you can too...

  • I think in this case, Apple decided not to turn on one of their more popular 3rd party vendors, so they just chose a better (IMO) name for the product. And they would have lost in court (Elgato Systems has been around for ages).
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There's a UK independent TV channel called ITV (actually they have about a brazillion channels now) –  user23743 Feb 23 '09 at 23:04
yes, but they are not in the US, they got to the name before apple, and there is no confusing a consumer device and a TV channel, tho there is more overlap.... :) that said, I work for their competition (BBC) –  Nic Wise Feb 25 '09 at 9:58

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