Company lists · Data refreshed September 2026

Top 25 Software engineering firms based in Bellevue, United States

Name: Software engineering firms based in Bellevue, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 105 companies tracked

RevenueBase identified 105 software engineering firms headquartered in Bellevue, United States as of September 2026 and tracks 7,850 professional contacts across them, including 1,495 with verified work emails. New York is the largest hub.

This list covers software engineering firms headquartered in Bellevue, 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 6, 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 6, 2026 86% judged on-target in blind review

105Companies

7,850Contacts tracked

1,495Verified emails

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The 25 largest software engineering firms based in Bellevue, United States

Ranked by team size

Top 25 of 105 software engineering firms based in Bellevue, United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to software engineering 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	Beyondsoft	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	501-1,000	2,359 contacts →
	“Beyondsoft Consulting is a leading global mid-sized business IT and consulting company that combines modern technologies and proven methodologies to tailor solutions that move…” Source: company website · checked Sep 6, 2026
2	Blueprint	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	501-1,000	550 contacts →
	“Blueprint is redefining the data solutions ecosystem.” Source: company website · checked Sep 6, 2026
3	Unify Technologies	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	501-1,000	517 contacts →
	“Unify Technologies is a digital engineering company delivering capabilities across Product Engineering, Enterprise Applications, and Managed IT Services.” Source: company website · checked Sep 6, 2026
4	AIM Consulting Group	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	501-1,000	398 contacts →
	“AIM Consulting, an Addison Group company, is an award-winning industry leader in technology consulting and solutions delivery.” Source: company website · checked Sep 6, 2026
5	Affirma	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	501-1,000	397 contacts →
	“Affirma is an award-winning full service technology services firm based out of Bellevue, WA.” Source: company website · checked Sep 6, 2026
6	Inviso	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	201-500	239 contacts →
	“Inviso is a growing technology consulting firm that offers a wide range of business services for small to enterprise organizations across industries.” Source: company website · checked Sep 6, 2026
7	Software Engineering Services	Indirect evidence	Bellevue, NE, United StatesHQ checked Sep 6, 2026	51-200	234 contacts →
	“SES is a cutting edge provider of IT consulting services.” Source: company website · checked Sep 6, 2026
8	CSI Interfusion	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	219 contacts →
	“CSI Interfusion is a global IT firm specializing Microsoft technologies.” Source: company website · checked Sep 6, 2026
9	Congruent Software INC	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	201-500	210 contacts →
	“Founded in 1994, Congruent Software is a leading software development outsourcing company specialized in custom applications development, enterprise software, cloud computing, and…” Source: company website · checked Sep 6, 2026
10	Redcloud Consulting	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	201-500	188 contacts →
	“RedCloud is a business and technology consulting firm providing local companies with expert-level support for over two decades.” Source: company website · checked Sep 6, 2026
11	Inspirage	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	501-1,000	169 contacts →
	“Inspirage shows our clients how to achieve a higher standard of excellence by integrating and optimizing their enterprise.” Source: company website · checked Sep 6, 2026
12	Wallero	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	201-500	146 contacts →
	“Wallero was born out of a group of technically savvy individuals whose lives revolve around technology and a passion for solving innovative problems for customers.” Source: company website · checked Sep 6, 2026
13	Prowess Consulting	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	134 contacts →
	“Prowess Consulting is a Seattle-based technology services firm specializing in Agentic AI, Data and AI Consulting, IT and Cloud Infrastructure, Software Development and Testing…” Source: company website · checked Sep 6, 2026
14	Biblioso	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	201-500	102 contacts →
	“We started more than a decade ago focusing on supporting companies in the Pacific Northwest with IT consulting and documentation projects.” Source: company website · checked Sep 6, 2026
15	General Microsystems Inc. GMI	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	11-50	89 contacts →
	“GMI Mission Statement: Empowering our customers through creative technology solutions General Microsystems Inc.” Source: company website · checked Sep 6, 2026
16	Terawe Corporation	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	11-50	88 contacts →
	“Terawe is a software technology company that provides world-class sustainable solutions and services for customers: • we have extensive experience in Cloud-based solutions • we…” Source: company website · checked Sep 6, 2026
17	Softacom	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	77 contacts →
	“Softacom is a full-cycle business app migration and modernization provider.” Source: company website · checked Sep 6, 2026
18	Raining Virtue INC	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	67 contacts →
	“The world doesn’t need another IT consulting firm.” Source: company website · checked Sep 6, 2026
19	Tecace Software LTD	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	64 contacts →
	“TecAce is a company that specializes in software development and design.” Source: company website · checked Sep 6, 2026
20	Inabia Solutions And Consulting, INC	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	62 contacts →
	“WHO Founded in 2006 and headquartered in Redmond, WA.” Source: company website · checked Sep 6, 2026
21	Knackhook	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	54 contacts →
	“DIGITAL MASTERY REDEFINED.” Source: company website · checked Sep 6, 2026
22	Pacific Software Publishing, INC	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	11-50	42 contacts →
	“As an independent software design and development company, we use our technology to create software to help companies save and/or make money.” Source: company website · checked Sep 6, 2026
23	The AES Group	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	34 contacts →
	“At The AES Group, we believe technology is most powerful when it brings people, ideas and opportunity together.” Source: company website · checked Sep 6, 2026
24	Adisys Corporation	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	34 contacts →
	“Adisys is a comprehensive management consulting organization that provides IT Product and Software development, vertical solutions, and outsourcing services.” Source: company website · checked Sep 6, 2026
25	Solutions Resource	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	11-50	33 contacts →
	“Solutions Resource is an IT consulting company specializing in open source Java EE and.NET Web Portal Development using the combination of On-shore and Off-shore Global Consulting…” Source: company website · checked Sep 6, 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: software engineering 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 software engineering firms.
Partial evidence: Its own public description names part of software engineering firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name software engineering 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 105 software engineering firms based in Bellevue, United States

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Software engineering firms based in Bellevue, United States at a glance

As of Sep 6, 2026

19.0%Verified-email coverage

74.8Average contacts per company

11-50Median size (employees)

1014.3%Largest-city concentration · New York

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than this city, so it is reported there. Company counts and contact totals on this page are exact for Bellevue, over 105 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 software engineering 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 Bellevue, United States whose own description of what they do matches “software engineering 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 software engineering 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 software engineering firms, and records with no verified work email. Companies headquartered outside Bellevue 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, 1,495 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 6, 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.

Software engineering 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 software engineering 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 software engineering firms are there based in Bellevue, United States?

RevenueBase identified 105 software engineering firms headquartered in Bellevue, 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?

Beyondsoft, headquartered in Bellevue, tops this list with the largest team on record.

Which city has the most software engineering firms?

New York leads with 1065 headquartered companies, followed by Houston (648) and Austin (633).

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 1,495 verified decision-maker contacts tracked across these 105 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 6, 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.