Twitter officially acquires and rebrands Summize

twitter When I wrote about Summize last week, I mentioned the rumor that the search engine was being acquired by Twitter. Today the deal was formally announced, though no financial details were shared:

We’re excited to announce that Twitter has acquired Summize—an extraordinary search tool and an amazing group of engineers. All five Summize engineers will move to San Francisco, CA and take jobs at Twitter, Inc. This is an important step forward in the evolution of Twitter as a service and as a company.

The old Summize site started redirecting to http://search.twitter.com earlier this morning, and the colorful Summize logo has been replaced with the blue Twitter one. Sadly, they’ve also shut down the Summize Labs section of the site, with a loose promise to bring the prototypes back in some form down the road.

According to TechCrunch, the deal was mostly stock. They have a video up with Twitter co-founder Evan Williams and will be posting a transcript of the interview later today.

For a much more interesting take on the deal, check out the Summize blog post:

It’s with great pride that I officially confirm Twitter’s acquisition of Summize. The rationale for this transaction from Twitter can be found here. I’ll outline my motivation to sell our beloved Summize, talk about our experience soup to nuts, and recognize the players who made this deal possible.

They provide an excellent overview of how they got to today, and they specifically cite Fred Wilson‘s help in getting the deal done.

Congrats to everyone involved!

UPDATE: Here’s the interview (with transcript and analysis) that Michael Arrington did with Evan Williams. They talk about Summize, the API, and Twitter’s revenue model.