In terms of results from crawling, I would consider Bing a &quot;serious&quot; competitor, although still a distant second. They are well-funded, used in ~30% of searches in the US, and don&#x27;t look like they&#x27;re going away anytime soon. It would be sad if they did because Google would then be a total monopoly.<p>Though DuckDuckGo does do its own indexing, AFAIK it is limited and they mostly rely on other search engines (Bing and Yandex most probably). So it&#x27;s more a meta-search engine not quite in the category of Google.<p>Today, I just posted a Show HN for a search engine and feed reader I&#x27;ve been working on. It also has &quot;bangs&quot; except they are called activation codes and start with a ?, like
&quot;?jq appendto&quot;. It&#x27;s easy to add your own &quot;?&quot; handler, as it doesn&#x27;t require any approval to do so. I&#x27;m just getting started so I would love to get any feedback.<p>Link to the Show HN:
<a href="https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=11174127" rel="nofollow">https:&#x2F;&#x2F;news.ycombinator.com&#x2F;item?id=11174127</a>