Company lists · Data refreshed September 2026

Top 18 Custom software integrators based in Seattle, United States

Name: Custom software integrators based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 43 companies tracked

RevenueBase identified 43 company matches for custom software integrators associated with Seattle, United States as of September 2026 and tracks 418 professional contacts across them, including 182 with verified work emails. Across the United States, New York is the largest hub for this category (204 companies); Seattle has 43.

This list covers company matches for custom software integrators associated with Seattle, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built

43Companies

418Contacts tracked

182Verified emails

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The 18 largest custom software integrators based in Seattle, United States

Ranked by team size

Top 18 of 43 company matches for custom software integrators based in Seattle, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Blackstone EIT	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	270 contacts →
	Exact match “Blackstone eIT is a leading System Integrator (SI) and Independent Software Vendor (ISV), globally dedicated to engineering transformative enterprise solutions and intelligent…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	Itrellis, LLC	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	11-50	13 contacts →
	Exact match “iTrellis is a Custom Software and Systems Integration consultancy located in Seattle, WA.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Qubitsoft	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	11-50	12 contacts →
	Exact match “Qubitsoft is an innovative and creative company that aims to meet its clients’ demands and provide original software solutions.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Lunarbyte	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	12 contacts →
	Exact match “Lunarbyte is a custom software and product development firm trusted by teams across industries to deliver dependable, scalable software solutions that drive real business results.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Status Controls	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	8 contacts →
	Exact match “Status Controls creates hand-crafted user interfaces that are thoroughly tested for great user experiences, set on a solid foundation of Crestron, Extron, and AMX programming.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Fostec	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	8 contacts →
	Exact match “Founded in 1998, Fostec is a client-focused Information Technology consulting firm that designs solutions and provides technical expertise to small and mid-sized businesses…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	Swyft ERP Swyfterp.com	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	11-50	7 contacts →
	Exact match “We build custom business software solutions that scale with companies and help streamline business processes and also specialize in NetSuite build/implementation for larger…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	Gols INC	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	11-50	7 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Pacific Automation Group	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	4 contacts →
	Exact match “We create and deploy tailor-made software solutions aimed at enhancing efficiency and optimizing operations for a diverse range of clients, spanning individuals, businesses…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Cogenix	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	4 contacts →
	Exact match “Cogenix offers business consulting, application development and software integration services to our client base.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	Zaifworks LLC	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	4 contacts →
	Exact match “Zaifworks is software development and cloud consulting firm that specializes in healthcare, real-estate and it services industries.* We transform, deploy and support what you are…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Webonyx	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	11-50	2 contacts →
	Exact match “WebOnyx is a software development company that specializes in building custom software.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	dev.co	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	11-50	2 contacts →
	Exact match “Established in 2008 as a advertising & financial software consulting firm, DEV.co brings brings over 12 years of successful leadership to custom software development projects…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	NEW Harbor	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	2 contacts →
	Exact match “At New Harbor, we specialize in expert IT solutions that empower businesses to reach their full potential.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Blacktee Systems	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	2 contacts →
	Exact match “Blacktee Systems combines software development skills from both the control systems programming and web application development realms.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Orahsoft Solutions	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	1 contacts →
	Exact match “OrahSoft - Solution for all your computer needs.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	Inner Product LLC	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	1 contacts →
	Exact match “Inner Product builds great software for the enterprise.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Dockett Ellis Consulting	Exact match	Seattle, WA, United StatesHQ recorded Sep 29, 2026	1-10	1 contacts →
	Exact match “More than consultants - We are Problem Solvers.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “custom software integrators”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 18 of 43 custom software integrators based in Seattle, United States

See the full list, filter by size, metro and specialty, and access 182 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Custom software integrators based in Seattle, United States at a glance

As of Sep 29, 2026

43.5%Verified-email coverage

9.7Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Seattle, so it is reported there. Company counts and contact totals on this page are exact for Seattle, over 43 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with Seattle, United States whose business descriptions match “custom software integrators” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 182 professional contacts with verified work emails across the full matched dataset. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Custom software integrators by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “custom software integrators”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many custom software integrators are there based in Seattle, United States?

RevenueBase identified 43 company matches for custom software integrators associated with Seattle, United States as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Blackstone EIT tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most custom software integrators?

New York leads the United States with 204 company records, followed by Houston (127) and Austin (119). Seattle has 43.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 182 professional contacts with verified work emails tracked across these 43 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 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 SmartSearch, 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.