- Alliance for Animals - Wisconsin based organization advocating for the rights of all non-human animals.
- American Society for the Prevention and Cruelty to Animals - To provide effective means for the prevention of cruelty to animals.
- Animal Aid - The UK's Animal Aid campaigns peacefully against all animal abuse, and promotes a cruelty-free lifestyle.
- Animal Alliance of Canada - Animal Alliance of Canada is committed to the protection of all animals.
- Animal Concerns Community - This community serves as a clearinghouse for information on the Internet related to animal rights and welfare.
- Animal Protection Institute - Advocates for the protection of animals from cruelty and exploitation.
- Animal Rights Foundation of Florida - Devoted to promoting the rights and well-being of non-human animals
- Animal Voices - Shines a light on the issues around the taking of animal lives for human pleasure.
- Animal Welfare Institute - Founded in 1951 to reduce the sum total of pain and fear inflicted on animals by humans.
- Canadian Federation of Humane Societies - National body promote compassion and humane treatment for all animals.
- Compassion over Killing - Working to end animal abuse, COK focuses on cruelty to animals in agriculture.
- Factory Farming .com - Fighting against the attitude that regards animals and the natural world merely as commodities to be exploited for profit.
- Farm Sanctuary - Rescue * Education * Advocacy
- Friends of Animals - Working to cultivate a respectful view of nonhuman animals, free-living and domestic.
- Humane Society International - The international arm of The Humane Society of the United States.
- International Fund for Animal Welfare - Founded to fight the commercial slaughter of seals in Canada, now one of the leading international animal welfare organizations.
- Korea Animal Protection Society - Committed to ending the dog and cat meat trade, teaching compassion towards animals, and enforcing strong animal protection laws in Korea.
- Last Chance for Animals - A national, non-profit organization dedicated to eliminating animal exploitation through education, investigations, legislation, and media attention.
- Neighborhood Cats - To establish TNR as the preferred method of feral cat control, ultimately, to substantially reduce the number of cats born and living on New York city's streets.
- Pasado's Safe Haven - One of the country's premiere animal sanctuaries dedicated to the rescue and rehabilitation of dogs, cats, and factory farm animals.
- The Progressive Animal Welfare Society - Advocates for animals through education,legislation and direct care.
- People for the Ethical Treatment of Animals - PETA operates under the simple principle that animals are not ours to eat, wear, experiment on, or use for entertainment.
- Pet-Abuse .com - Our lives begin to end the day we become silent about things that matter.
- The Fund for Animals - We speak for those who can't.
- Voice for Animals Society - Dedicated to the protection of animals in a wide range of circumstances.
- World Society for the Protection of Animals Canada - Building a united global animal welfare movement.
- Zoocheck Canada - The only Canadian organization with a specific focus on captive wild animal issues and problems.