Starbucks and Google on Tuesday endorsed an effort to make Washington the seventh state to legalize gay marriage.

Washington United for Marriage, the gay rights group backing the proposed legislation, announced that the two companies have joined a list of more than 100 supportive companies, including Microsoft, Nike and Group Health Plan.

Starbucks said in a statement that it was “proud to join other leading Northwest employers in support of Washington state legislation recognizing marriage equality for same-sex couples.”

“This important legislation is aligned with Starbucks' business practices and upholds our belief in the equal treatment of partners,” the company said.

“Marriage equality provides a multitude of intangible benefits to Washington businesses. Recognizing the relationships of all – irrespective of sexual orientation – means an open and innovative business climate that ensures fundamental fairness and basic civil rights for all,” said Lacey All, chair of Washington United for Marriage. “The addition of these companies continues to show that momentum in Washington state is on the side of equality for all Washingtonians.”

(Related: Washington set to legalize gay marriage with Senator Mary Haugen's vote.)