Five Slick Search Engines You Should Know About

Competitors and observers have jeered when Microsoft put out a first basic product that didn't come close to matching the market leader's. But Microsoft has a history of stubbornly staying the course, refining its wares, investing in development, until gradually the products become strong enough to push out the competition.

That was the case with its Internet Explorer browser, its SQL Server database, its Exchange messaging server and its enterprise software applications.

But there is one market where Microsoft's doggedness has failed to pay off: search.

Despite spending hundreds of millions of dollars since the late 1990s, Microsoft has been unable to deliver a search engine whose popularity matches the company's expectations.

Along the way, Microsoft has seen billions of dollars in search advertising revenue flow into the coffers of its hated rival Google, whose stranglehold on this market keeps growing stronger.

In 2008, U.S. online ad spending reached US$23.4 billion, with search advertising taking 45 percent of the pie.

The consequences of failing at search aren't limited to missed revenue opportunities. Rather, the inability of Microsoft, Yahoo and others to contain Google have let it grow into a powerhouse that is using its advertising riches to pursue broad ambitions that threaten to disrupt core Microsoft markets -- office productivity and collaboration software, PC and mobile operating systems, Web browsers, and consumer online services.

Now Microsoft is again trying to get search right. In late May, it launched the latest version of its search engine, which it named Bing, and is reportedly spending $100 million to promote it.

Microsoft Bing: Five Areas in Search of Improvement

However, it's clear that while Bing isn't a fiasco, it also isn't a marvel with earth-shattering innovations capable of pulling the rug from under Google's feet.

Search-engine experts have praised some of its features as innovative, and Microsoft's downward trend in search market share has been reversed, albeit not dramatically.

"Bing offers a much better experience overall compared with its predecessor Live Search," said industry analyst Greg Sterling, from Sterling Market Intelligence.

"However, it doesn't seem like it will in the near term challenge Google in a significant way. It's not rocketing up to 25 percent or 30 percent of the market," Sterling added.

In fact, the latest signs suggest that, after the initial excitement over Bing's launch and its heavy promotion gave Microsoft a modest market-share boost, it is losing velocity.