Tumblr's cultural rise, content policy shifts, and aftermath (2007–2019)

1. Tumblr launches public microblogging platform

   Feb 1, 2007Labels: Tumblr, Tumblelog

   • Britannica
   • Wikipedia

2. Reblog feature formalizes remix-based sharing

   Mar 1, 2007Labels: Reblog, Tumblr

   • Tumblr Wikipedia
   • Britannica

3. Likes feature expands lightweight interaction

   Nov 1, 2008Labels: Likes, Tumblr

   • Tumblr timeline

4. “Ask Me” launches Q&A-style interaction

   Jan 6, 2010Labels: Ask Me, Q&A

   • TechCrunch

5. Tumblr enables larger animated GIF posts

   Jan 10, 2012Labels: Animated GIFs, Tumblr

   • Tumblr Staff

6. Tumblr starts selling sponsored “Radar” placements

   May 2, 2012Labels: Radar, Sponsored Placements

   • TechCrunch
   • Ars Technica

7. Adidas runs first major brand campaign on Tumblr

   Jun 8, 2012Labels: Adidas, Brand Campaign

   • Contently

8. Yahoo announces plan to buy Tumblr

   May 20, 2013Labels: Yahoo, Acquisition

   • CNBC

9. Yahoo completes Tumblr acquisition

   Jun 20, 2013Labels: Yahoo, David Karp

   • TechCrunch
   • Britannica

10. Verizon purchase places Tumblr under Oath

    Jun 1, 2017Labels: Verizon, Oath

    • Britannica
    • CNBC

11. Safe Mode expands filtering of “sensitive” content

    Jun 20, 2017Labels: Safe Mode, Content Filtering

    • TechCrunch

12. Founder David Karp steps down as CEO

    Nov 27, 2017Labels: David Karp, Leadership Change

    • Axios
    • Britannica

13. Tumblr iOS app removed after child sexual abuse material found

    Nov 16, 2018Labels: Apple App, Child Safety

    • CBS News

14. Tumblr announces adult-content ban effective December 17

    Dec 3, 2018Labels: Adult Content, Policy Change

    • Time
    • Wired

15. Adult-content ban takes effect and reshapes Tumblr culture

    Dec 17, 2018Labels: Enforcement, Moderation

    • Time
    • Wired

16. Verizon agrees to sell Tumblr to Automattic

    Aug 12, 2019Labels: Automattic, Sale

    • CNBC
    • TechCrunch