Company lists · Data refreshed September 2026

Top 25 Business software integration firms based in Seattle, United States

Name: Business software integration 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 28, 2026 90 companies tracked

RevenueBase identified 90 business software integration firms headquartered in Seattle, United States as of September 2026 and tracks 17,718 professional contacts across them, including 6,728 with verified work emails. Across the United States, New York is the largest hub for this category (361 companies); Seattle has 90.

This list covers business software integration 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 28, 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 28, 2026 86% judged on-target in blind review

90Companies

17,718Contacts tracked

6,728Verified emails

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The 25 largest business software integration firms based in Seattle, United States

Ranked by team size

Top 25 of 90 business software integration firms based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to business software integration 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	Blackstone EIT	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1,001-5,000	270 contacts →
	Partial 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 28, 2026
2	Nextec Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	51-200	155 contacts →
	Indirect evidence “NexTec Group is an award-winning business technology consultancy offering ERP and BI solutions to small and mid-sized businesses.” Source: RevenueBase Database · checked Sep 28, 2026
3	Audax Labs	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	51-200	94 contacts →
	Indirect evidence “Audax Labs - Outcome-Driven Innovation!” Source: RevenueBase Database · checked Sep 28, 2026
4	2nd Watch	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	201-500	67 contacts →
	Indirect evidence “2nd Watch is now Ollion.” Source: RevenueBase Database · checked Sep 28, 2026
5	Turnpoint	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	29 contacts →
	Indirect evidence “Our company is a boutique IT consulting firm providing high-level IT consulting, outsourced IT management, and help desk services to small- and medium-sized businesses in the…” Source: RevenueBase Database · checked Sep 28, 2026
6	Palador	Strong evidence	Seattle, WA, United StatesHQ checked Sep 28, 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 28, 2026
7	R-Cubed Consulting	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	18 contacts →
	Partial 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 28, 2026
8	Treadwell	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	13 contacts →
	Partial evidence “Treadwell is a software consulting firm specializing in Bonterra's (previously Social Solutions) Apricot and ETO case management software.” Source: RevenueBase Database · checked Sep 28, 2026
9	Itrellis, LLC	Strong evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	13 contacts →
	Strong evidence “iTrellis is a Custom Software and Systems Integration consultancy located in Seattle, WA.” Source: RevenueBase Database · checked Sep 28, 2026
10	Inuix LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	51-200	9 contacts →
	Indirect evidence “IT consulting company focused on CRM and ERP space, We provide consulting services as well as provide qualified CRM & ERP resources to our customer.” Source: RevenueBase Database · checked Sep 28, 2026
11	Fostec	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 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 28, 2026
12	Yavar IT Solutions And Services	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	7 contacts →
	Indirect evidence “Yavar offers Information Technology (IT) services and support to small–medium sized businesses.” Source: RevenueBase Database · checked Sep 28, 2026
13	Swyft ERP Swyfterp.com	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 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 28, 2026
14	Pythonwise INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 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 28, 2026
15	Applied Technology Consulting	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Indirect evidence “Applied Technology Consulting is an information technology and services company based in Seattle, WA.” Source: RevenueBase Database · checked Sep 28, 2026
16	Spring SOA	Indirect evidence	Seattle, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Spring SOA people provide a range of professional services that help clients to meet challenges and respond to opportunities.” Source: RevenueBase Database · checked Sep 28, 2026
17	Suite Solutions Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “At Suite Solutions Group, we understand that a strong technology foundation is essential for business success, but equally important is having data that provides actionable…” Source: RevenueBase Database · checked Sep 28, 2026
18	Pacific Automation Group	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 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 28, 2026
19	Cogenix	Strong evidence	Seattle, WA, United StatesHQ checked Sep 28, 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 28, 2026
20	joen.io	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial 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 28, 2026
21	Manage Incorporated	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	2 contacts →
	Partial evidence “ERP application software and ERP consultants with Manage Inc.” Source: RevenueBase Database · checked Sep 28, 2026
22	dev.co	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 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 28, 2026
23	Onca Consulting	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “ONCA Consulting is a business intelligence, analytics, automation, and systems integration leader.” Source: RevenueBase Database · checked Sep 28, 2026
24	Blacktee Systems	Partial evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “Blacktee Systems combines software development skills from both the control systems programming and web application development realms.” Source: RevenueBase Database · checked Sep 28, 2026
25	ZENYX	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 28, 2026	11-50	1 contacts →
	Indirect evidence “Zenyx is a different type of consulting service.” Source: RevenueBase Database · checked Sep 28, 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: business software integration 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 business software integration firms.
Partial evidence: Its own public description names part of business software integration firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name business software integration 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 90 business software integration firms based in Seattle, United States

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Business software integration firms based in Seattle, United States at a glance

As of Sep 28, 2026

38.0%Verified-email coverage

196.9Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

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 90 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 business software integration 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 “business software integration 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 business software integration 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 business software integration 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, 6,728 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 28, 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.

Business software integration 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 business software integration 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 business software integration firms are there based in Seattle, United States?

RevenueBase identified 90 business software integration 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?

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

Which city in the United States has the most business software integration firms?

New York leads the United States with 361 headquartered companies, followed by Houston (275) and Austin (245). Seattle has 90.

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 6,728 verified decision-maker contacts tracked across these 90 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 28, 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.