You can also filter your saved searches at any time - and this automatically updates the alerts (email, feed). Morgan told me that Allth.at can also filter out the duplicates.

Web 3.0 Goodness

Morgan pointed out to me that Allth.at is a good example of what Alex Iskold wrote about in his recent popular post Web 3.0: When Web Sites Become Web Services. That post was about what kind of applications will be born once many APIs are opened up (it wasn't about defining 'web 3.0', as some commenters claimed). Morgan says that Allth.at is a good example of what Alex was driving at: 

"Allth.at‚Äôs goal is to integrate every searchable API in existence. Obviously every website does not have an API. So instead of scraping, we have taken a hierarchical approach that uses a combination of APIs, RSS and ‚Äúindexed‚Ä? results (equivalent of a site: search on google or yahoo). When a user selects a source to search, we check to see if that site has an API. If so, chances are we have integrated it and will use it. If not, we‚Äôll check to see if that site has a searchable RSS feed. If so, we‚Äôll use that. If not, then we‚Äôll deliver results off of the index of one of the big engines."

Competition

Allth.at is not alone in the market segment which Charles Knight has called "Continuous Search Engines". In our February Alt Search Engine list, we noted Swamii, which continually search newspapers, TV, the web (and more) to let you know when new, relevant and cool stuff arrives. There is also Searchbots.net, which gives you your own personal search robot - to continuously search the Internet, trying to find all the best websites it can, on your behalf.

You could also consider Google Alerts in this category, since they can be set to "continuous" alerts also.

I asked Morgan what is the difference between Allth.at and the competition. He told me that usability and ease-of-use is what differentiates allth.at and noted that even Google CSE and Rollyo don't deliver custom search results 'on the fly'. Morgan told me that another key differentiator from other "custom engine providers" is that Allth.at's results "are more real time". He said:

"For example, Google’s CSE delivers results off of their index. Rollyo I believe is powered by Yahoo. Because we use APIs, RSS and then index, Allth.at returns the most current results first."

Morgan explained how this works, using my example of searching for the term "web 3.0". If you use Googles CSE and select readwriteweb.com as a source, it would be the equivalent of doing a 'site: search' on Google. If you use Rollyo, and select readwriteweb.com as a source, it’s the equivalent of doing a 'site: search' on Yahoo. Depending on when Google or Yahoo last updated their index, they may or may not pick up the latest results (e.g. Alex's article). With Allth.at, it first searches the RSS feed for readwriteweb.com (because this site doesn’t have an API), which would therefore pick up Alex's web 3.0 article. Allth.at delivers indexed results on top of that too. Here is an illustration of this exact scenario:

Conclusion

Overall, Allth.at is a very easy to use search agent and outputs some nice 'topic feeds' for users to subscribe to in their RSS Readers. An easy-to-use, yet sophisticated and reliable, 'topic search' service is something I've been looking for a long time - and Allth.at looks very promising in that regard.

Today Allth.at takes the covers off their relatively stealth company (well it was stealth until Charles discovered it!). It's a bootstrapped little startup, with just 3 people. They took the splash page down just under a month ago and today is the launch of Allth.at's "live beta". Color me impressed, but check it out for yourself and let us know what you think.

Note: thanks Charles Knight for his help in writing this article.