In a head to head comparison, IPqwery presents the IP holdings of Twitter and Snapchat. True, may not be a comparison of equals, but an interesting one nonetheless.
Note: Aggregating this data is not trivial. There are many data manipulations required to accurately compile the IP profile for any company. This includes normalizing company names, verifying subsidiary companies and grouping related entities, and even match inventors with their respective companies.
To investigate how this works in more detail, check out the IPqwery Chrome extension for Crunchbase and test it out yourself.
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