Freebase is closing down; data going to WikiData
Wikidatan here.  Here's a quick comparison of Freebase and Wikidata:Topics / items:- Freebase: 46,476,860 [1]- Wikidata: 12,921,731 [2]Facts / claims:- Freebase: 2,696,141,481 [1]- Wikidata: 50,457,200 as of 2014-11-10 [3]Instances of person / human:- Freebase: 3,391,533 [4]- Wikidata: 2,638,614 [5]License for data- Freebase: CC-BY [6]- Wikidata: CC0 [7]Data on Paul Graham:- Freebase: http://www.freebase.com/m/017cm9- Wikidata: https://www.wikidata.org/wiki/Q92650Data on San Francisco:- Freebase: http://www.freebase.com/m/0d6lp- Wikidata: https://www.wikidata.org/wiki/Q62Data on Python:- Freebase: http://www.freebase.com/m/05z1_- Wikidata: https://www.wikidata.org/wiki/Q28865Data on APOE / Apolipoprotein E:- Freebase: http://www.freebase.com/m/0byv2v- Wikidata: https://www.wikidata.org/wiki/Q14890468 (APOE), https://www.wikidata.org/wiki/Q424728 (Apolipoprotein E)See [8] and [9] for an introduction to Wikidata.  I have no notable experience with Freebase, but I've been contributing to Wikidata for about 2 years and would be happy to answer any questions I can.[1] http://www.freebase.com/[2] https://www.wikidata.org[3] http://tools.wmflabs.org/wikidata-todo/stats.php[4] http://www.freebase.com/people/person?instances[5] http://tools.wmflabs.org/autolist
/autolist1.html?q=claim[31:5][6] http://www.freebase.com/policies/tos[7] See bottom of [2][8] Up and running with Wikidata: http://www.slideshare.net/_emw/up-and-running-with-wikidata[9] Introducing Wikidata to the Linked Data Web: http://korrekt.org/papers/Wikidata-RDF-export-2014.pdf