Mercado Software Inc., a survivor of the dot-com bubble that provided e-commerce search, navigation and merchandising software, has agreed to sell its assets to Omniture Inc. for $6.5 million in cash plus the assumption of certain debt.

It wasn't immediately clear if Mercado would cease to exist after this sale, but this was the company's main line of business. That means its investors may be recording a loss after putting at least $66 million into it since its founding in 1995. That amount includes a recapitalization in 2004.

Among the investors in Pleasanton, Calif.-based Mercado are Challenge Fund, Consensus Group, Eucalyptus Ventures, Pitango Venture Capital, Star Ventures and Valley Venture Capital.

Omniture, Mercado and its investors couldn't be reached in time to comment beyond a press release.

Mercado provides search software to online retailers and already has been integrated with Omniture's SiteCatalyst as part of a partnership the two companies announced last October.

Mercado's customers include Target Corp., Sears Holdings Corp., Williams-Sonoma Inc., JCPenney Corp., Federated Department Stores Inc.'s Macy's unit, ShopNBC and OfficeMax Inc.

Mercado had weathered the dot-com bubble, but completely rebuilt its products in 2004 after recapitalizing, VentureWire previously reported.