Company lists · Data refreshed September 2026

Top 25 Nonprofit software development services based in New York, United States

Name: Nonprofit software development services based in New York, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 94 companies tracked

RevenueBase identified 94 nonprofit software development services headquartered in New York, United States as of September 2026 and tracks 980 professional contacts across them, including 391 with verified work emails. New York is the largest hub.

This list covers nonprofit software development services headquartered in New York, United States, 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 21, 2026.

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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 21, 2026 86% judged on-target in blind review

94Companies

980Contacts tracked

391Verified emails

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The 25 largest nonprofit software development services based in New York, United States

Ranked by team size

Top 25 of 94 nonprofit software development services based in New York, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to nonprofit software development services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Kiwi Partners	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	72 contacts →
	Partial evidence “Kiwi Partners delivers exceptional Accounting, Consulting Services, and HR services to the nonprofit community.” Source: RevenueBase Database · checked Sep 21, 2026
2	Casebook PBC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	39 contacts →
	Partial evidence “Casebook PBC is the innovator of human services software that improves outcomes for organizations and the people they serve.” Source: RevenueBase Database · checked Sep 21, 2026
3	Temelio	Indirect evidence	New York, United StatesHQ checked Sep 21, 2026	11-50	39 contacts →
	Indirect evidence “Hundreds of billions of dollars are donated through foundations every year in the United States.” Source: RevenueBase Database · checked Sep 21, 2026
4	National Executive Service Corps	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	n/a	33 contacts →
	Partial evidence “National Executive Services Corps (NESC) is a nonprofit professional services firm offering high-quality and affordable management consulting, executive search, and financial…” Source: RevenueBase Database · checked Sep 21, 2026
5	Mavinsys	Indirect evidence	New York, United StatesHQ checked Sep 21, 2026	11-50	29 contacts →
	Indirect evidence “Mavinsys is a trusted partner for many of the world’s top enterprises, SMEs, and technology companies.” Source: RevenueBase Database · checked Sep 21, 2026
6	Wingo NYC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	24 contacts →
	Indirect evidence “Founded in 1996, Wingo is a fundraising and design consulting firm for social, cultural and environmental change.” Source: RevenueBase Database · checked Sep 21, 2026
7	We ARE Immediate	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	23 contacts →
	Indirect evidence “Our company helps non-profits reimagine how they do business through digital engagement.” Source: RevenueBase Database · checked Sep 21, 2026
8	Giveffect	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	17 contacts →
	Strong evidence “The #1 All-In-One Nonprofit Software - Giveffect is the leading fundraising, events, online donations, offline gift tracking, volunteer management, donor management and…” Source: RevenueBase Database · checked Sep 21, 2026
9	Springly	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	51-200	16 contacts →
	Strong evidence “Springly, a brand of AssoConnect, is an all-in-one nonprofit management software.” Source: RevenueBase Database · checked Sep 21, 2026
10	Webserves	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	14 contacts →
	Strong evidence “For over 20 years, WebServes has provided affordable and customized web design & development, and integrated digital marketing for nonprofits.” Source: RevenueBase Database · checked Sep 21, 2026
11	Limus Design, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	11 contacts →
	Partial evidence “Limus Design is a New York-based design and web development agency that specializes in creating high-quality, fully customized digital tools that enable non-profit organizations…” Source: RevenueBase Database · checked Sep 21, 2026
12	Cause Effective	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	10 contacts →
	Partial evidence “For more than 35 years, Cause Effective has strengthened the nonprofit sector by helping over nonprofits build sustainable communities of supporters.” Source: RevenueBase Database · checked Sep 21, 2026
13	DS Consulting Group LLC	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	6 contacts →
	Indirect evidence “DS Consulting Group, LLC (DSCG) is a boutique fundraising and event planning firm.” Source: RevenueBase Database · checked Sep 21, 2026
14	Taketwo Services	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	6 contacts →
	Partial evidence “We provide nonprofits, and only nonprofits, with integrated communications and fundraising services.” Source: RevenueBase Database · checked Sep 21, 2026
15	IDC Giving Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	5 contacts →
	Indirect evidence “IDC Giving Group, established in 2019 and based in the vibrant cities of Brooklyn, New York, and Boston, Massachusetts, specializes in transforming fundraising visions into…” Source: RevenueBase Database · checked Sep 21, 2026
16	Pledge Software	Strong evidence	New York, United StatesHQ checked Sep 21, 2026	1-10	5 contacts →
	Strong evidence “Pledge Software's vision is to make it easier for nonprofits and communities to get the scarce resources they need.” Source: RevenueBase Database · checked Sep 21, 2026
17	Huis Digital	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	5 contacts →
	Strong evidence “Software development services” Source: RevenueBase Database · checked Sep 21, 2026
18	P.A.C.E	Indirect evidence	New York, United StatesHQ checked Sep 21, 2026	1-10	4 contacts →
	Indirect evidence “We are Partners in Advocacy, Communications, and Engagement.” Source: RevenueBase Database · checked Sep 21, 2026
19	360 Philanthropy Partners	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	4 contacts →
	Partial evidence “Fundraising \| Coaching \| Strategy \| Planning \| Board Solutions for Nonprofits We advance philanthropy to further your mission At 360 Philanthropy Group, we understand your…” Source: RevenueBase Database · checked Sep 21, 2026
20	REWAV	Partial evidence	New York, United StatesHQ checked Sep 21, 2026	1-10	4 contacts →
	Partial evidence “Welcome to Rewav, where we transform digital landscapes through strategic web development and design.” Source: RevenueBase Database · checked Sep 21, 2026
21	Paragon Strategic Insights	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	3 contacts →
	Indirect evidence “The Paragon Strategic Insights’ (PSI) team has over 50 years of experience, driving strategic direction to fulfill organizations’ missions.” Source: RevenueBase Database · checked Sep 21, 2026
22	NPI Strategies	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	11-50	3 contacts →
	Partial evidence “NPI Strategies is a leading nonprofit consulting firm with over 30 years of experience supporting healthcare, social service, education, and arts organizations.” Source: RevenueBase Database · checked Sep 21, 2026
23	Swansoft LLC	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	3 contacts →
	Partial evidence “WE AUTOMATE BUSINESS BY CUSTOM SOFTWARE SOLUTIONS.” Source: RevenueBase Database · checked Sep 21, 2026
24	Sarapis	Indirect evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	1 contacts →
	Indirect evidence “Sarapis envisions a world in which people can access and own the technology they need to create just, abundant and sustainable societies.” Source: RevenueBase Database · checked Sep 21, 2026
25	Solve IT Simply	Partial evidence	New York, NY, United StatesHQ checked Sep 21, 2026	1-10	1 contacts →
	Partial evidence “Solve IT Simply is passionate about making nonprofit technology easy.” Source: RevenueBase Database · checked Sep 21, 2026

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: nonprofit software development services. 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 nonprofit software development services.
Partial evidence: Its own public description names part of nonprofit software development services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name nonprofit software development services. 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 94 nonprofit software development services based in New York, United States

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Nonprofit software development services based in New York, United States at a glance

As of Sep 21, 2026

39.9%Verified-email coverage

10.4Average contacts per company

1-10Median size (employees)

100.0%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for New York, so it is reported there. Company counts and contact totals on this page are exact for New York, over 94 companies.

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 nonprofit software development services, 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.
What qualifies: Companies headquartered in New York, United States whose own description of what they do matches “nonprofit software development services”. 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 nonprofit software development services), 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 nonprofit software development services, and records with no verified work email. Companies headquartered outside New York are excluded even when they keep an office there.
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, 391 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 21, 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.

Nonprofit software development services by metro in the United States

Nonprofit software development services in New York94
Nonprofit software development services in Washington51
Nonprofit software development services in Atlanta49
Nonprofit software development services in Austin48
Nonprofit software development services in San Francisco44
Nonprofit software development services in Seattle39
Nonprofit software development services in Chicago38
Nonprofit software development services in Los Angeles31

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 nonprofit software development services, 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 nonprofit software development services are there based in New York, United States?

RevenueBase identified 94 nonprofit software development services headquartered in New York, United States 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?

Kiwi Partners, headquartered in New York, tops this list with the largest team on record.

Which city has the most nonprofit software development services?

New York leads with 94 headquartered companies, followed by Washington (51) and Atlanta (49).

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 391 verified decision-maker contacts tracked across these 94 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 21, 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.