Company lists · Data verified August 2026

Top 25 Custom CRM software developers based in the United States

Name: Custom CRM software developers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 954 companies tracked

There are 954 custom CRM software developers headquartered in the United States (RevenueBase, August 2026). RevenueBase tracks 12,275 professional contacts across them, including 4,527 with verified work emails and 3,557 with mobile numbers. New York is the largest hub.

This list covers custom CRM software developers headquartered in the United States, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Data current as of August 28, 2026.

954Companies

12,275Contacts tracked

4,527Verified emails

3,557Mobile numbers

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The 25 largest custom CRM software developers based in the United States

Ranked by team size

Top 25 of 954 custom CRM software developers based in the United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Klaviyo	Boston, MA	1,001-5,000	2,859	1,624
2	Cubastion Consulting	Irvine, CA	201-500	431	203
3	Crmit Solutions	Milpitas, CA	201-500	376	117
4	Rolustech	San Francisco, CA	201-500	325	76
5	Revinate	Palo Alto, CA	501-1,000	313	181
6	Trootech	Albany, NY	201-500	250	60
7	Cargas Systems	Lancaster, PA	51-200	236	162
8	MST Solutions	Chandler, AZ	201-500	173	40
9	ACT	Scottsdale, AZ	51-200	170	67
10	CLOSE	New York City, NY	51-200	142	91
11	Pipeliner CRM	Los Angeles, CA	51-200	135	25
12	Wealthbox	n/a	51-200	128	96
13	Mirabel Technologies	Fort Lauderdale, FL	51-200	115	29
14	Alliancetek INC	Orlando, FL	51-200	107	49
15	Agile CRM By Mantra	Dallas, TX	51-200	100	3
16	Lava Automation	Portland, OR	201-500	93	19
17	Welcomehome Software	Atlanta, GA	51-200	86	66
18	Arcsona	Campbell, CA	51-200	80	49
19	Insightly CRM By Unbounce	San Francisco, CA	51-200	73	13
20	Builder Prime	Denver, CO	51-200	70	45
21	Dealership Performance CRM	Wilsonville, OR	51-200	66	4
22	Qantler Technologies	Edison, NJ	51-200	65	8
23	White CUP	Garden City, ID	51-200	52	39
24	Sendcrux Labs	Green Cove Springs, FL	51-200	47	3
25	Nehanet Corporation	Santa Clara, CA	51-200	42	3

Showing 25 of 954 custom CRM software developers based in the United States

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Custom CRM software developers based in the United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 30 HQs

3,557Contacts with mobile numbers

12Emails re-verified in last 30 days

Companies by employee count

1-10

533

11-50

307

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Custom CRM software developers by metro

Metro	Companies
Custom CRM software developers in New York	30
Custom CRM software developers in Los Angeles	22
Custom CRM software developers in San Francisco	21
Custom CRM software developers in Miami	17
Custom CRM software developers in Houston	15
Custom CRM software developers in Atlanta	15
Custom CRM software developers in Chicago	15

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “custom CRM software developers”, with match quality audited by blind human judging, and headquartered in the United States.
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: Contact records re-verify on a rolling cadence; 12 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many custom CRM software developers are there based in the United States?

There are 954 custom CRM software developers headquartered in the United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Klaviyo, headquartered in Boston, tops this list with the largest team on record.

Which city has the most custom CRM software developers?

New York leads with 30 headquartered companies, followed by Los Angeles (22) and San Francisco (21).

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 4,527 verified decision-maker contacts tracked across these 954 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.