Company lists · Data refreshed September 2026
Top 25 Spay and neuter nonprofits worldwide
RevenueBase identified 1,083 spay and neuter nonprofits worldwide as of September 2026 and tracks 8,072 professional contacts across them, including 1,987 with verified work emails. The United States is the largest market and Los Angeles the largest hub.
This list covers spay and neuter nonprofits worldwide, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 22, 2026. Country and city lists for spay and neuter nonprofits follow the table.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest spay and neuter nonprofits worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 225 contacts → | ||||
Indirect evidence “PAWS Chicago is one of the nation’s largest comprehensive No Kill animal welfare organizations, building innovative programs to end the killing of homeless pets.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 2 | 153 contacts → | ||||
Indirect evidence “Founded in 1879, the Wisconsin Humane Society has been saving the lives of animals in need for nearly 140 years.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 3 | 146 contacts → | ||||
Indirect evidence “Humane Society Silicon Valley (HSSV) is an independent, 501(c)(3) non-profit animal shelter that has been serving people and pets since 1929.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 4 | 103 contacts → | ||||
Indirect evidence “Emancipet operates non-profit veterinary clinics that provide affordable, high-quality and compassionate care in underserved communities.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 5 | 92 contacts → | ||||
Indirect evidence “The Humane Society of Tampa Bay is dedicated to ending animal homelessness and providing care and comfort for companion animals in need.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 6 | 85 contacts → | ||||
Indirect evidence “The mission of the Sacramento SPCA is to foster a loving and compassionate community for animals and people by providing assistance, creating lifelong relationships, and saving…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 7 | 85 contacts → | ||||
Indirect evidence “AWA is a private, no-kill, 501(c)3 organization that does not receive federal, state, or county funding.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 8 | 83 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 9 | 76 contacts → | ||||
Indirect evidence “We are one of the oldest Humane Societies in the United States established 150 years ago.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 10 | 74 contacts → | ||||
Indirect evidence “Our Vision: Every cat thrives.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 11 | 71 contacts → | ||||
Indirect evidence “Founded in 1885, the Jacksonville Humane Society is a local, independent non-profit 501(c)(3) organization.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 12 | 69 contacts → | ||||
Indirect evidence “The mission of First Coast No More Homeless Pets is to make veterinary care affordable and accessible to all as we save lives by keeping dogs and cats in homes and out of…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 13 | 58 contacts → | ||||
Indirect evidence “Our Mission is to save lives and benefit the wellbeing of pets and their people with kindness, innovation, and leadership.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 14 | 56 contacts → | ||||
Indirect evidence “Founded in 1922, The Animal Protective Association of Missouri is a non-profit organization dedicated to bringing people and pets together, advancing humane education and creating…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 15 | 56 contacts → | ||||
Indirect evidence “IndyHumane provides direct services for cats and dogs, including adoption, foster home placement, positive reinforcement behavior training for adoptable animals, appropriate…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 16 | 55 contacts → | ||||
Partial evidence “The San Antonio Humane Society (SAHS) is a 501(c)(3) nonprofit, no-kill organization that has served Bexar County and its surrounding areas since 1952.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 17 | 55 contacts → | ||||
Indirect evidence “The Maryland SPCA’s mission is to reduce pet homelessness by providing pet retention services, safety net housing, and community engagement that empowers citizens of Baltimore and…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 18 | 55 contacts → | ||||
Strong evidence “Animal Friends Alliance emerged in January 2020 from the union of Fort Collins Cat Rescue & Spay/Neuter Clinic and Animal House Rescue & Grooming.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 19 | 55 contacts → | ||||
Strong evidence “Founded in 1930, the Greenville Humane Society is the largest no-kill shelter in the Southeast, and operates one of the largest low-cost spay/neuter clinic in South Carolina.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 20 | 54 contacts → | ||||
Indirect evidence “SPCA Florida is a 501(c)3 non-profit organization in Lakeland, Florida, founded in 1979.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 21 | 53 contacts → | ||||
Indirect evidence “Founded in 1998 by a passionate group of volunteers, SPCA of Northern Nevada (SPCA-NN) is proud to be our region’s first no-kill animal shelter.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 22 | 52 contacts → | ||||
Strong evidence “Dakin Humane Society is a community supported animal welfare organization that provides shelter, medical care, and spay/neuter services for more than animals each year.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 23 | 51 contacts → | ||||
Indirect evidence “Since the Kansas Humane Society has been committed to helping the lost, abandoned and homeless animals in our community.” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 24 | 47 contacts → | ||||
Indirect evidence “Fondé en 2012, Proanima est un réseau de centres de services animaliers qui accompagne les citoyens et les municipalités dans une gestion animalière préventive, humaine et clé en…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
| 25 | 47 contacts → | ||||
Strong evidence “Incorporated in 1934, the Animal Defense League of Texas (ADL) is a non-profit organization that provides medical care, spay/neuter surgery, vaccinations, a microchip, nutrition…” Source: RevenueBase Database · checked Sep 22, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: spay and neuter nonprofits. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names spay and neuter nonprofits.
- Partial evidence
- Its own public description names part of spay and neuter nonprofits, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name spay and neuter nonprofits. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 1,083 spay and neuter nonprofits worldwide
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Spay and neuter nonprofits worldwide at a glance
As of Sep 22, 2026Companies by employee count
Email recency is reported on each country list linked below.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among spay and neuter nonprofits, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- Coverage
- Every country. Country and city lists for spay and neuter nonprofits are linked below.
- What qualifies
- Companies worldwide whose own description of what they do matches “spay and neuter nonprofits”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names spay and neuter nonprofits), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among spay and neuter nonprofits, and records with no verified work email.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 1,987 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 22, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Spay and neuter nonprofits by location
1 lists · largest firstEvery Spay and neuter nonprofits list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names spay and neuter nonprofits, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many spay and neuter nonprofits are there worldwide?
RevenueBase identified 1,083 spay and neuter nonprofits worldwide as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Paws Chicago, headquartered in Chicago, tops this list with the largest team on record.
Which country has the most spay and neuter nonprofits?
The United States leads with 833 companies. Every spay and neuter nonprofits list by country and city is linked on this page.
Which city has the most spay and neuter nonprofits?
Los Angeles leads with 11 headquartered companies, followed by Phoenix (9) and Las Vegas (8).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,987 verified decision-maker contacts tracked across these 1,083 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 22, 2026.
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About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.