Duckduckgo not secure at all guys.Reasons
1)They use cookies
:Yes, you heard it right I once checked whether duckduckgo has cookies or not then I have seen 2 cookies. Sometimes, I see 3 cookies sometimes no cookies. I didn't do change any settings in duckduckgo then how is it possible.2)Closed source
Duckduckgo isn't completely open source.3)Us Based
The servers were hosted in us by amazon. Amazon itself is a data hungry company by default.4)There are other meta search engines like duckduckgo, better than duckduckgo like searx 
Searx instances I use 
(searx.be , search.disroot.org, search.snopyta.org ) onion links too available. Private.sh better alternative to duckduckgo.5) Duckduckgo founder has an history of privacy abuse (maybe he could change his mind but he has a history of privacy abuse)6)Duckduckgo not secure at all guys.Reasons
1)They use cookies
:Yes, you heard it right I once checked whether duckduckgo has cookies or not then I have seen 2 cookies. Sometimes, I see 3 cookies sometimes no cookies. I didn't do change any settings in duckduckgo then how is it possible.2)Closed source
Duckduckgo isn't completely open source.3)Us Based
The servers were hosted in us by amazon. Amazon itself is a data hungry company by default.4)when clicking a add on duckduckgo results page all data in your session is sent to advertiser.Alternatives:
Searx, Jive Search , Private.sh