I ran an experiment with 1,500 people to find out how they would react to eight popular domain extensions (top-level domains): .com, .org, .co, .net, .biz, .us, .blog, and .io.
Would there be large behavioral differences?
Do most people notice domain extensions at all?
Here are the highlights of what I found:
.com URLs are over 33% more memorable than URLs with other top-level domains.
.com is the #1 most trusted TLD, with .co in a close second.
When people misremember a URL, they’re 3.8 times more likely to assume it ends in .com than anything else.
In other words: yes, .com is still the best overall. But .co and .org come in quite close on some dimensions.
You can see all the results, including illustrated charts with the scores of all eight TLDs here - https://growthbadger.com/top-level-domains/