Company lists · Data refreshed September 2026

Top 25 Enterprise software development services based in Seattle, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 126 companies tracked

RevenueBase identified 126 enterprise software development services headquartered in Seattle, United States as of September 2026 and tracks 18,235 professional contacts across them, including 6,851 with verified work emails. New York is the largest hub.

This list covers enterprise software development services headquartered in Seattle, 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 24, 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 24, 2026 86% judged on-target in blind review

126Companies

18,235Contacts tracked

6,851Verified emails

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The 25 largest enterprise software development services based in Seattle, United States

Ranked by team size

Top 25 of 126 enterprise software development services based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise 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	Blackstone EIT	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1,001-5,000	270 contacts →
	Strong evidence “Blackstone eIT is a leading System Integrator (SI) and Independent Software Vendor (ISV), globally dedicated to engineering transformative enterprise solutions and intelligent…” Source: RevenueBase Database · checked Sep 24, 2026
2	White Rabbit Group	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	51-200	135 contacts →
	Strong evidence “White Rabbit Group is a software development agency with a highly diverse and creative team that takes an idea through development and into scale.” Source: RevenueBase Database · checked Sep 24, 2026
3	Ukad Umbraco, Optimizely And Azure Solution Partner	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	201-500	123 contacts →
	Indirect evidence “UKAD is a helping companies extend engineering capacity and deliver complex solutions with predictable outcomes.” Source: RevenueBase Database · checked Sep 24, 2026
4	Sila Solutions Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	51-200	103 contacts →
	Indirect evidence “Sila is a technology and management consulting firm that delivers lasting and substantial business solutions to the world’s leading corporations and Federal government agencies.” Source: RevenueBase Database · checked Sep 24, 2026
5	Audax Labs	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	51-200	94 contacts →
	Indirect evidence “Audax Labs - Outcome-Driven Innovation!” Source: RevenueBase Database · checked Sep 24, 2026
6	2nd Watch	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	201-500	67 contacts →
	Indirect evidence “2nd Watch is now Ollion.” Source: RevenueBase Database · checked Sep 24, 2026
7	Janea Systems	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	51-200	60 contacts →
	Strong evidence “For over two decades, Janea Systems has provided high impact software development services to Fortune 500 companies.” Source: RevenueBase Database · checked Sep 24, 2026
8	Spiderbox Design Vietnam	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	51-200	38 contacts →
	Indirect evidence “Spiderbox Design - Transforming businesses worldwide with innovative digital solutions since 2011.” Source: RevenueBase Database · checked Sep 24, 2026
9	Palador	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	28 contacts →
	Strong evidence “Palador has provided successful enterprise solutions and strategic initiatives for mobility, app and web development and data and software integration since 2005.” Source: RevenueBase Database · checked Sep 24, 2026
10	NEW Normal	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	25 contacts →
	Partial evidence “NewNormal builds custom software and lasting partnerships Since 2012 we’ve helped clients turn ideas into products that scale.” Source: RevenueBase Database · checked Sep 24, 2026
11	R-Cubed Consulting	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	18 contacts →
	Indirect evidence “R-Cubed Consulting is a top Oracle ERP Cloud consulting firm focused on ERP implementations, cloud migrations, integrations, and process automation.” Source: RevenueBase Database · checked Sep 24, 2026
12	Pelotech	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	17 contacts →
	Partial evidence “We partner with companies, from Fortune 500 giants to mid-sized businesses, to solve complex challenges in cloud migrations, integrations, application development and…” Source: RevenueBase Database · checked Sep 24, 2026
13	GENUI	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	13 contacts →
	Strong evidence “What sets GenUI apart is an end-to-end product focus throughout all our experience design and software development services.” Source: RevenueBase Database · checked Sep 24, 2026
14	Itrellis, LLC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	13 contacts →
	Partial evidence “iTrellis is a Custom Software and Systems Integration consultancy located in Seattle, WA.” Source: RevenueBase Database · checked Sep 24, 2026
15	Markgraf Consulting	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	13 contacts →
	Indirect evidence “Markgraf Consulting is a premier technology consulting firm specializing in SAP security, cloud solutions, and system architecture.” Source: RevenueBase Database · checked Sep 24, 2026
16	Qubitsoft	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	12 contacts →
	Partial evidence “Qubitsoft is an innovative and creative company that aims to meet its clients’ demands and provide original software solutions.” Source: RevenueBase Database · checked Sep 24, 2026
17	Lunarbyte	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1-10	12 contacts →
	Strong evidence “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.” Source: RevenueBase Database · checked Sep 24, 2026
18	Fostec	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1-10	8 contacts →
	Indirect evidence “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…” Source: RevenueBase Database · checked Sep 24, 2026
19	Meserow Design, INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1-10	7 contacts →
	Indirect evidence “Ipsum Loren” Source: RevenueBase Database · checked Sep 24, 2026
20	Swyft ERP Swyfterp.com	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	7 contacts →
	Partial evidence “We build custom business software solutions that scale with companies and help streamline business processes and also specialize in NetSuite build/implementation for larger…” Source: RevenueBase Database · checked Sep 24, 2026
21	Gols INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	7 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 24, 2026
22	Tecknowcore LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1-10	6 contacts →
	Indirect evidence “Tecknowcore is a boutique technology partner supporting multinational organizations in the design and delivery of complex, mission-critical digital solutions.” Source: RevenueBase Database · checked Sep 24, 2026
23	Pythonwise INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	11-50	6 contacts →
	Indirect evidence “Pythonwise Inc is leading provider of Information Technology consulting and business process services.” Source: RevenueBase Database · checked Sep 24, 2026
24	Pacific Automation Group	Partial evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1-10	4 contacts →
	Partial evidence “We create and deploy tailor-made software solutions aimed at enhancing efficiency and optimizing operations for a diverse range of clients, spanning individuals, businesses…” Source: RevenueBase Database · checked Sep 24, 2026
25	Cogenix	Strong evidence	Seattle, WA, United StatesHQ checked Sep 24, 2026	1-10	4 contacts →
	Strong evidence “Cogenix offers business consulting, application development and software integration services to our client base.” Source: RevenueBase Database · checked Sep 24, 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: enterprise 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 enterprise software development services.
Partial evidence: Its own public description names part of enterprise 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 enterprise 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 126 enterprise software development services based in Seattle, United States

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Enterprise software development services based in Seattle, United States at a glance

As of Sep 24, 2026

37.6%Verified-email coverage

144.7Average contacts per company

11-50Median size (employees)

500.8%Largest-city concentration · New York

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 126 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 enterprise 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 Seattle, United States whose own description of what they do matches “enterprise 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 enterprise 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 enterprise software development services, and records with no verified work email. Companies headquartered outside Seattle 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, 6,851 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 24, 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.

Enterprise software development services by metro in the United States

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 enterprise 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 enterprise software development services are there based in Seattle, United States?

RevenueBase identified 126 enterprise software development services headquartered in Seattle, 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?

Blackstone EIT, headquartered in Seattle, tops this list with the largest team on record.

Which city has the most enterprise software development services?

New York leads with 631 headquartered companies, followed by Austin (407) and Houston (364).

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 6,851 verified decision-maker contacts tracked across these 126 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 24, 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.