Stack Overflow's Global Expansion:Almost 50 Million Unique Visits in March 2015

In March of this year, 47,650,252 unique users visited stackoverflow.com. 

Five years ago, in March 2010, the number was 7,179,158. That's a 563% increase!

Overall Unique Visits, Mobile Unique Visits and U.S. Unique Visits

Page Title
Overall Unique Visits
Mobile Unique Visits
U.S. Unique Visits
June, 20092,307,267701,590
July, 20093,629,2791,094,834
August, 20094,653,7561,442,515
September, 20094,972,3641,522,499
October, 20095,666,1991,708,939
November, 20096,327,9011,810,384
December, 20095,782,3051,576,418
January, 20106,350,3041,811,130
February, 20106,460,1081,881,058
March, 20107,179,1582,042,639
April, 20107,659,4742,252,122
May, 20107,861,3162,252,122
June, 20108,069,8182,220,723
July, 20108,023,9822,271,391
August, 20108,335,5262,386,589
September, 20108,607,8462,458,661
October, 20109,063,5782,739,415
November, 201010,316,4183,019,489
December, 201010,447,1542,894,640
January, 201111,306,4783,199,804
February, 201113,199,7183,861,845
March, 201113,978,0324,159,793
April, 201114,437,6024,352,508
May, 201114,300,2984,102,057
June, 201114,355,9984,179,785
July, 201114,336,6644,032,819
August, 201114,724,9944,400,096
September, 201116,172,3604,737,892
October, 201116,779,9044,939,029
November, 201118,251,220658,3375,078,860
December, 201117,581,012708,2254,826,552
January, 201218,802,014934,6165,811,875
February, 201221,747,1661,058,6046,642,809
March, 201222,327,0101,142,7016,340,808
April, 201222,181,9361,213,9926,398,968
May, 201223,330,3561,224,6226,293,069
June, 201222,885,1961,257,2896,176,982
July, 201222,584,6321,347,2226,216,995
August, 201223,404,9761,397,5206,759,290
September, 201225,542,7921,650,3937,301,324
October, 201229,459,2801,805,3788,226,028
November, 201230,236,7681,915,6138,064,644
December, 201227,765,0441,992,6957,438,676
January, 201331,515,1962,301,1168,894,836
February, 201335,055,6082,590,30610,072,150
March, 201336,562,8642,763,55310,407,886
April, 201337,235,9162,716,59310,523,630
May, 201335,486,5762,640,6099,782,182
June, 201333,859,2322,629,3129,294,790
July, 201333,741,3442,576,4379,525,506
August, 201333,629,6162,688,6729,742,096
September, 201336,977,7483,157,46610,776,378
October, 201340,022,4603,482,02211,744,452
November, 201340,238,7363,644,69111,232,324
December, 201336,019,7763,418,6439,833,994
January, 201438,290,7043,705,73710,830,934
February, 201440,440,2403,952,87711,652,296
March, 201440,270,0284,011,59911,401,180
April, 201439,709,7363,836,38311,390,458
May, 201439,107,5683,890,48210,737,770
June, 201435,941,7883,578,82310,063,180
July, 201435,874,1643,642,18810,047,520
August, 201435,374,9403,662,72710,084,136
September, 201440,299,1004,046,04411,480,850
October, 201441,606,8804,124,99212,034,882
November, 201442,398,4724,425,93811,224,784
December, 201440,395,3924,137,09110,648,828
January, 201543,960,0324,505,50511,619,572
February, 201546,265,2084,786,57812,754,218
March, 201547,650,2524,948,69712,641,692

Select values from the filters to customize the visualization. Reset them to see the overall statistics. Click "Explore" to transform this into another type of chart, change the variables plotted, add dynamic filters.

In relative terms, the biggest yearly increase in number of visitors was between June 2009-2010. In this period, visits grew by 250% (from 2.3 M to 8 M). As the number of visitors increases, it becomes harder to keep up with a similar growth curve. October visits were more than 40 million. Yet this month had its lowest relative yearly growth. Users were "only" 5.4% more than those of October 2013.

Yearly Increase of Unique Visits

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Visits from mobile apps are now about 10 % of the whole traffic. And the trend seems to be growing steadily.

Mobile, Percentage of Overall Visits

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It seems that in December, Stack Overflow visitors go on holiday and take a break from programming. Every year, Quantcast has registered a drop in the number of December visitors. In recent year, the trend affects more and more also the summer months. Usually, mobile visits decline a bit less than overall ones.

Monthly Increase

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The biggest monthly increase in visits from mobile users? January 2012 (+32% unique visits from December 2011).  And for overall visits? July 2009: +57%.

Sort the following table by its headers to explore the top/bottom 10 months for the different parameters. A tip: you can click explore and transform it into a scatterplot, to look for correlations.

Monthly Stats

Click on the headings to sort ascending/descending on a variable. Select values from the filters to customize the visualization. Reset them to see the overall statistics. Click "Explore" to transform this into another type of chart, change the variables plotted, add dynamic filters.





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