Company lists · Data refreshed September 2026

Top 25 Enterprise app development firms based in Seattle, United States

Name: Enterprise app development firms 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 76 companies tracked

RevenueBase identified 76 enterprise app development firms headquartered in Seattle, United States as of September 2026 and tracks 521 professional contacts across them, including 167 with verified work emails. Across the United States, New York is the largest hub for this category (479 companies); Seattle has 76.

This list covers enterprise app development firms 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 29, 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 29, 2026 86% judged on-target in blind review

76Companies

521Contacts tracked

167Verified emails

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The 25 largest enterprise app development firms based in Seattle, United States

Ranked by team size

Top 25 of 76 enterprise app development firms based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to enterprise app development firms: 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	White Rabbit Group	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	51-200	135 contacts →
	Partial 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 29, 2026
2	Janea Systems	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	51-200	60 contacts →
	Partial evidence “For over two decades, Janea Systems has provided high impact software development services to Fortune 500 companies.” Source: RevenueBase Database · checked Sep 29, 2026
3	Palador	Strong evidence	Seattle, WA, United StatesHQ checked Sep 29, 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 29, 2026
4	NEW Normal	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	11-50	25 contacts →
	Indirect 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 29, 2026
5	Itrellis, LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	11-50	13 contacts →
	Indirect evidence “iTrellis is a Custom Software and Systems Integration consultancy located in Seattle, WA.” Source: RevenueBase Database · checked Sep 29, 2026
6	Qubitsoft	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	11-50	12 contacts →
	Indirect 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 29, 2026
7	Lunarbyte	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	12 contacts →
	Partial 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 29, 2026
8	K Consulting	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	8 contacts →
	Indirect evidence “Welcome to K.” Source: RevenueBase Database · checked Sep 29, 2026
9	Fostec	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 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 29, 2026
10	Swyft ERP Swyfterp.com	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect 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 29, 2026
11	Gols INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	11-50	7 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 29, 2026
12	Tecknowcore LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 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 29, 2026
13	Pacific Automation Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	4 contacts →
	Indirect 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 29, 2026
14	Cogenix	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	4 contacts →
	Partial evidence “Cogenix offers business consulting, application development and software integration services to our client base.” Source: RevenueBase Database · checked Sep 29, 2026
15	Zaifworks LLC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	4 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026
16	joen.io	Strong evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	3 contacts →
	Strong evidence “A boutique consulting firm based in Seattle, WA with offices in Orange County, CA specializing in Mobile App Development and Integration of Enterprise systems.” Source: RevenueBase Database · checked Sep 29, 2026
17	Webonyx	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	11-50	2 contacts →
	Partial evidence “WebOnyx is a software development company that specializes in building custom software.” Source: RevenueBase Database · checked Sep 29, 2026
18	dev.co	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	11-50	2 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 29, 2026
19	Orahsoft Solutions	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	1 contacts →
	Indirect evidence “OrahSoft - Solution for all your computer needs.” Source: RevenueBase Database · checked Sep 29, 2026
20	Buddio Tech	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	1 contacts →
	Partial evidence “Buddio Tech build mobile apps.” Source: RevenueBase Database · checked Sep 29, 2026
21	Inner Product LLC	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	1 contacts →
	Partial evidence “Inner Product builds great software for the enterprise.” Source: RevenueBase Database · checked Sep 29, 2026
22	Null Unit	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	1 contacts →
	Partial evidence “We take a lean, cost-effective approach to helping small-medium businesses (and the occasional enterprise) ship software that addresses acute needs and delivers immediate value.” Source: RevenueBase Database · checked Sep 29, 2026
23	Jcmobtech LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	1 contacts →
	Indirect evidence “We are Software Engineers that are passionate about converting great ideas into unique and reliable software solutions that helps the business growth.” Source: RevenueBase Database · checked Sep 29, 2026
24	Sorth LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	1 contacts →
	Indirect evidence “Sorth LLC is a mobile software company based in Seattle” Source: RevenueBase Database · checked Sep 29, 2026
25	Pancake Labs	Partial evidence	Seattle, WA, United StatesHQ checked Sep 29, 2026	1-10	1 contacts →
	Partial evidence “A full-stack web development team based in Seattle, WA.” Source: RevenueBase Database · checked Sep 29, 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 app development firms. 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 app development firms.
Partial evidence: Its own public description names part of enterprise app development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name enterprise app development firms. 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 76 enterprise app development firms based in Seattle, United States

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Enterprise app development firms based in Seattle, United States at a glance

As of Sep 29, 2026

32.1%Verified-email coverage

6.9Average contacts per company

1-10Median size (employees)

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

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 76 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 app development firms, 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 app development firms”. 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 app development firms), 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 app development firms, 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, 167 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 29, 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 app development firms 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 app development firms, 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 app development firms are there based in Seattle, United States?

RevenueBase identified 76 enterprise app development firms 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?

White Rabbit Group, headquartered in Seattle, tops this list with the largest team on record.

Which city in the United States has the most enterprise app development firms?

New York leads the United States with 479 headquartered companies, followed by Austin (268) and Houston (218). Seattle has 76.

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 167 verified decision-maker contacts tracked across these 76 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 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 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.