PALO ALTO — Clients are demanding fixed-fee services and balking at the hourly rates charged by large law firms. For Big Law, it’s a problem. But a trio of entrepreneurs saw opportunity.

On Thursday, they debuted LawGives, an online platform connecting businesses with flat-rate legal services, at a Harvard Law School conference on legal services innovations. The Palo Alto-based company, backed by Stanford University’s StartX accelerator program, offers basic legal services for businesses and startups in prepriced packages. The packaged services, which can include counsel on website terms of use, nondisclosure agreements, patent filings, acquisitions, and preferred series A financing, are priced from $799 to $4,999.