Ohloh ===== In a similar style to my [Git vs. SVN answer][1], [Ohloh](http://www.ohloh.net/repositories/compare) has been crawled (only) three times by the [Internet Archive's Wayback Machine](http://wayback.archive.org/web/*/http://www.ohloh.net/repositories/compare), but July 2011 is unreadable: [August 2010][2] --- * Git: 26,485 repositories (11.3% of total) * Mercurial: 2,548 repositories (1.1% of total) * Ratio: 10.4:1.0 [May 2011][3] --- * Git: 116,224 repositories (35.3% of total) * Mercurial: 3,753 repositories (1.1% of total) * Ratio: 31.0:1.0 [February 2012][4] --- * Git: 124,000 repositories (26% of total) * Mercurial: ? [June 2012][5] --- * Git: 134,459 repositories (27% of total) * Mercurial: 11,238 repositories (2% of total) * Ratio: 12.0:1.0 [October 2013][6] --- * Git: 238,648 repositories (38% of total) * Mercurial: 17,145 repositories (2% of total) * Ratio: 13.9:1.0 [April 2014][7] --- * Git: 238,648 repositories (38% of total) * Mercurial: 17,628 repositories (2% of total) * Ratio: 13.5:1.0 ---------- Eclipse Community Survey === Another source of data is the Eclipse Community Survey. Git values below are for Git/GitHub. 2009 ([pdf][8]) ---- * Git: 2.4% * Mercurial: 1.1% <sup>(Note: Hg listed under "other" in 2009 report, but itemised in 2010 report)</sup> * Ratio: 2.2:1.0 2010 ([pdf][9]) ---- * Git: 6.8% * Mercurial: 3% * Ratio: 2.3:1.0 2011 ([pdf][10]) ---- * Git: 12.8% * Mercurial: 1.1% * Ratio: 11.6:1.0 [2012][11] ---- * Git: 27.6% * Mercurial: 2.6% * Ratio: 10.6:1.0 [2013][12] ---- * Git: 30.3% * Mercurial: 3.6% * Ratio: = 8.4:1.0 [2014][13] ---- * Git: 33.3% * Mercurial: 2.1% * Ratio: = 15.9:1.0 Summary === These appear to show that, of the open source repositories registered on Ohloh, and of the developers using Eclipse, Git is a good order of magnitude more popular than Mercurial. [1]: https://softwareengineering.stackexchange.com/a/136207/25708 [2]: http://web.archive.org/web/20100821122603/http://www.ohloh.net/repositories/compare [3]: http://web.archive.org/web/20110519195626/http://www.ohloh.net/repositories/compare [4]: http://www.ohloh.net/repositories/compare [5]: http://www.ohloh.net/repositories/compare [6]: http://www.ohloh.net/repositories/compare [7]: http://www.ohloh.net/repositories/compare [8]: http://www.eclipse.org/org/press-release/Eclipse_Survey_2009_final.pdf [9]: http://www.eclipse.org/org/community_survey/Eclipse_Survey_2010_Report.pdf [10]: http://www.eclipse.org/org/community_survey/Eclipse_Survey_2011_Report.pdf [11]: http://ianskerrett.wordpress.com/2012/06/08/eclipse-community-survey-result-for-2012/ [12]: http://eclipse.org/org/press-release/20130612_eclipsesurvey2013.php [13]: http://ianskerrett.wordpress.com/2014/06/23/eclipse-community-survey-2014-results/