MENLO PARK, Calif. — About one of every seven people in the world uses Facebook. Now, Mark Zuckerberg, its co-founder and chief executive, wants to make a play for the rest — including the four billion or so who lack Internet access.

On Wednesday, Facebook announced an effort aimed at drastically cutting the cost of delivering basic Internet services on mobile phones, particularly in developing countries, where Facebook and other tech companies need to find new users. Half a dozen of the world’s tech giants, including Samsung, Nokia, Qualcomm and Ericsson, have agreed to work with the company as partners on the initiative, which they call Internet.org.

The companies intend to accomplish their goal in part by simplifying phone applications so they run more efficiently and by improving the components of phones and networks so that they transmit more data while using less battery power.

For Mr. Zuckerberg, the formation of the coalition is yet another way in which he is trying to position himself as an industry leader. He has been speaking out more forcefully than other tech executives on topics like immigration overhaul, which the industry sees as critical to its hiring needs. With Internet.org, he is laying out a philosophy that tries to pair humanitarian goals with the profit motive.