STOCKHOLM – Swedish startup Twingly is going public with its blog search engine, which is being built to deliver spam-free search results.

For the last two months, has been available as a closed beta. At present, it offers two search options: regular search and spam-free search; the latter is still in beta testing.

“The traditional way of building a spam-free index is to remove spam blogs as they are discovered, but we are starting from scratch, only adding spam-free blogs to the index,” said Martin K