List of IT System Custom Software Development Companies
Selling into IT System Custom Software Development? Here are its companies, biggest first, including Durcal, Freedom Software and Computer Perfect. Open a company to see its revenue range, headcount, tech stack and the people to contact.
Company NameIndustryLocationFundingRevenueEmployees
$15M
$1M - $10M
37
$25M - $50M
37
$10M - $25M
35
$15M
$10M - $25M
35
<$1M
35
$292K
$50M - $100M
34
$1M - $10M
34
$10M - $25M
34
$8.9M
$1M - $10M
33
$10M - $25M
33
$612K
$1M - $10M
32
$2M
$1M - $10M
32
$10M - $25M
32
$25M - $50M
32
$10M - $25M
32
<$1M
32
$1B - $10B
30
$10M - $25M
27
$10M - $25M
27
$25M - $50M
27
$1M - $10M
27
$25M - $50M
26
$10M - $25M
25
$50M - $100M
25
$1M - $10M
25
$1M - $10M
25
$259K
$1M - $10M
24
$1M - $10M
24
$1M - $10M
24
$10M - $25M
24
$1M - $10M
23
$10M - $25M
23
$1M - $10M
22
$10M - $25M
22
$1M - $10M
22
$1M - $10M
22
<$1M
21
$10M - $25M
21
$10M - $25M
21
$10M - $25M
21
$1M - $10M
20
$10M - $25M
20
$10M - $25M
19
$2.1M
$10M - $25M
19
$1M - $10M
19
$1M - $10M
19
$10M - $25M
19
$50M - $100M
18
$25M - $50M
18
<$1M
18
$50M - $100M
18
$10M - $25M
17
$10M - $25M
17
$10M - $25M
17
$1M - $10M
17
$10M - $25M
17
$25M - $50M
17
$10M - $25M
16
$10M - $25M
16
$10M - $25M
15
$4M
$10M - $25M
15
$1M - $10M
15
$10M - $25M
15
$10M - $25M
14
$10M - $25M
14
$1M - $10M
14
$10M - $25M
14
$1M - $10M
14
$10M - $25M
14
$1M - $10M
14
$1M - $10M
13
$10M - $25M
13
$1M - $10M
13
$1M - $10M
13
$50M - $100M
12
<$1M
12
$1M - $10M
12
$10M - $25M
12
$1M - $10M
12
$1M - $10M
11
$10M - $25M
11
$10M - $25M
11
$10M - $25M
11
$1M - $10M
11
$3M
$1M - $10M
11
$1M - $10M
11
$1M - $10M
11
$1M - $10M
10
$1M - $10M
10
$10M - $25M
10
$10M - $25M
10
$10M - $25M
9
$1M - $10M
9
<$1M
9
$1M - $10M
9
$10M - $25M
8
$1M - $10M
8
$1M - $10M
8
<$1M
8
$1M - $10M
8
About IT System Custom Software Development companies
Which IT System Custom Software Development companies are listed?
IT System Custom Software Development companies of every size, from enterprises to startups, sorted by headcount so the biggest accounts come first. Companies on the list include Durcal, Freedom Software and Computer Perfect. Every company profile gives you revenue range, headcount, headquarters, tech stack and an employee directory with verified emails and phone numbers.
Where are IT System Custom Software Development companies located?
IT System Custom Software Development companies are most often headquartered in the United States and the United Kingdom.
What technologies do IT System Custom Software Development companies use?
The tools most often found in the tech stacks of IT System Custom Software Development companies include WordPress, Amazon Web Services, Microsoft 365, Google Workspace, Google Cloud and HubSpot. Useful if you integrate with, complement or compete with one of them.
How do I reach decision makers at IT System Custom Software Development companies?
Open a company to see its employee directory and email format, then use LeadIQ to get verified work emails and phone numbers for the people you want to reach and push them straight to your CRM or sequencer.
Insights based on LeadIQ data refreshed in September 2026.
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