Some Stack Exchange sites have a 'sponsored by' logo just under the top bar:

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Which sites in the network are/were sponsored, by which company/organization/product and when did that start?


Current sponsorships:

Three sites in the network are sponsored through the formal site sponsorship program:

Additionally, three sites are sponsored informally, under special agreements that were negotiated before SE launched the formal site sponsorship program:

Past sponsorships:

The following sites have been sponsored in the past:

  • 21
    What does it mean to be "sponsored by Stack Overflow for Teams", when the whole network is owned and operated by Stack Overflow? I thought SO for Teams was just part of the SO company. – Rand al'Thor Jan 6 '20 at 12:28
  • 3
    Robert Cartaino explains a bit in the announcement. – Glorfindel Jan 6 '20 at 12:29
  • 1
    Are you posting this from your knowledge, or is there a general way to find out? – SouravGhosh Jan 6 '20 at 12:34
  • @SouravGhosh there is no general way to find out (so I could have missed one or two, but I doubt it). – Glorfindel Jan 6 '20 at 12:35
  • 1
    Kind of on the line for what you seem to be asking, but Lego offered WB2019 prizes, has prominent placement on the site, and gives prizes to the users; I don't think they pay SE anything (money, or Lego) - so I'll let you decide to edit it in as an answer, or categorize it as a special sponsor: bricks.meta.stackexchange.com/questions/367/… bricks.meta.stackexchange.com/questions/198/… – Rob Jan 6 '20 at 13:21
  • 2
    @Rob I just meant official site sponsorship. It's also possible to sponsor tags (mostly used on Stack Overflow). Sponsorship of contests might be interesting as well, and there must have been more in the past, e.g. apptivate.ms. – Glorfindel Jan 6 '20 at 13:43
  • 2
    Glorfindel, according to RC's definition what amounts to "sponsorship" in SE's eyes is fairly open. Another example is AskUbuntu which has no "sponsored by" banner on their site. I just tried Googling stackexchange.com "sponsored by" and found that new info - you might want to pursue that search beyond the first few hits, I only spent a few minutes looking. – Rob Jan 6 '20 at 14:27
  • @Randal'Thor It means they sneak an advertisement onto the site. That's it. – Asteroids With Wings Oct 28 '20 at 19:18
  • @Glorfindel shouldnt Unix&Linux start on the 5th. Seeing Sara wrote tomorrow, and her post was timestamped on the 4th? – Luuklag Feb 4 at 8:15
  • @Luuklag it was posted on the 3rd, UTC time: i.stack.imgur.com/BGg3N.png – Shadow The Vaccinated Wizard Feb 4 at 8:47
  • @Glorfindel even if it was said, it still didn't happen. Since things can delay (e.g. new CM that claimed he'll start working for SE over a week ago, and still didn't) I won't add it here before it actually happens. – Shadow The Vaccinated Wizard Feb 4 at 8:49
  • 1
    @ShadowWizardisVaccinating yeah you're right, I had my mouse over Active I suppose.. – Luuklag Feb 4 at 9:52
  • It's live now @Shadow. – Glorfindel Feb 4 at 14:15
  • @Glorfindel indeed, a pleasant surprise. Though I doubt many will click the link, it's using some third party ad server to redirect for some odd reason. (Making the sponsorship logo an ad, coming to think about it, so maybe people won't even see it, having adblockers in place. Reason I mention it is, that no other sponsorship logo act this way on SE) – Shadow The Vaccinated Wizard Feb 4 at 14:33
  • @ShadowWizardisVaccinating I have been fooled by that before: ai.meta.stackexchange.com/q/1636/4709 – Glorfindel Feb 4 at 14:55

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