Wikipedia is a crowdsourced project operated by amateurs and volunteers. The biggest inherent difference in that is that the professionals can conduct their own research and include their findings in their encyclopedia, but Wikipedians must seek out professional publications, their reliable sources, and copy them.

There are different types of encyclopedias. Mainly they are divided into four types, namely Dictionaries, Comprehensive Encyclopaedia or Vishwakosh, Encyclopaedic literature or Koshsadrush and Indexes.

Britannica's content is among the most trusted in the world.

The encyclopaedia is maintained by about 100 full-time editors and more than 4,000 contributors. The 2010 version of the 15th edition, which spans 32 volumes and 32,640 pages, was the last printed edition. Since 2016, it has been published exclusively as an online encyclopaedia.