What began as a trickle in August has now become a flood as more tech companies abandon the American Legislative Exchange Council (ALEC).

On Wednesday, Facebook said it would no longer be supporting the conservative think tank. While the company didn't offer a specific reason for ending the relationship, the move came on the heels of an announcement Monday by Google that it would not be renewing its membership in ALEC at the end of the year.

"We reevaluate our memberships on an annual basis, and are in that process now," Facebook said in a statement. "While we have tried to work within ALEC to bring that organization closer to our view on some key issues, it seems unlikely that we will make sufficient progress so we are not likely to renew our membership in 2015."

Months ago, ALEC — which crafts right-leaning legislation at the state level — lost the support of Microsoft in part because of the lobbying group's resistance to clean-energy initiatives and attempts to put restrictions on coal-fired power plants. On Monday, Google's executive chairman, Eric Schmidt, told NPR's Diane Rehm that ALEC was "literally lying" about the existence of climate change.

The flight by tech companies continued Wednesday as Yelp confirmed that it, too, had decided to cut ties with ALEC "several months ago," according to the grass-roots activists at Common Cause.

A spokesman for ALEC did not immediately reply to a request for comment.