EqualMarriage.org, The Freedom to Marry Coalition of Massachusetts

Love Makes a Family, Connecticut

New Hampshire Freedom to Marry

Rhode Island Alliance for Lesbian and Gay Civil Rights

Vermont Freedom to Marry Task Force and
The Vermont Freedom to Marry Action Committee

Marriage Equality New York

Marriage Equality California

The Religious Coalition for the Freedom to Marry (RCFM)

Gay & Lesbian Advocates & Defenders (GLAD)

SpeakOut

Citizens for Participation in Political Action (CPPAX)

National Gay and Lesbian Task Force (NGLTF)

Human Rights Campaign (HRC)

Partners Task Force for Gay & Lesbian Couples

Lambda Legal Defense and Education Fund (Lambda)

American Civil Liberties Union of Massachusetts

National Organization for Women (Massachusetts chapter)