Company lists · Data refreshed September 2026

Top 25 Software engineering companies based in Bellevue, United States

Name: Software engineering companies 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 75 companies tracked

RevenueBase identified 75 software engineering companies headquartered in Bellevue, United States as of September 2026 and tracks 5,673 professional contacts across them, including 992 with verified work emails. New York is the largest hub.

This list covers software engineering companies 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

75Companies

5,673Contacts tracked

992Verified emails

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

Ranked by team size

Top 25 of 75 software engineering companies 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 companies: 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	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	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
15	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
16	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
17	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
18	WMI Worldwide	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	11-50	30 contacts →
	“WMI Worldwide is a technology and operations consulting firm, specializing in custom software and business process management solutions.” Source: company website · checked Sep 6, 2026
19	Mentis Systems	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	1,001-5,000	30 contacts →
	“Mentis Systems is an US based global IT Services Company with focus on Clients’ Technology & Business Objectives.” Source: company website · checked Sep 6, 2026
20	Adroit Business Solutions, INC	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	28 contacts →
	“Adroit Business Solutions is a technology outsourcing provider helping clients achieve their business objectives while deriving most value out of their investments.” Source: company website · checked Sep 6, 2026
21	Virtuosity Consulting Group	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	26 contacts →
	“Virtuosity Consulting is a technology services company specializing in the execution, automation and management of critical business and technology initiatives.” Source: company website · checked Sep 6, 2026
22	Axelerate	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	51-200	17 contacts →
	“Axelerate is a Bellevue WA based management and technology consulting company that delivers comprehensive technology services and solutions to help clients achieve measurable…” Source: company website · checked Sep 6, 2026
23	Construx Software	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	11-50	15 contacts →
	“Construx provides insights, techniques, and recommendations through training and consulting on software development best practices.” Source: company website · checked Sep 6, 2026
24	Revivecloud LLC	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	11-50	15 contacts →
	“ReviveCloud LLC - formerly Kalotas is a Tier 1 Microsoft Partner and one of the leading IT consulting firm in Seattle, WA.” Source: company website · checked Sep 6, 2026
25	Avaliant LLC	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 6, 2026	11-50	10 contacts →
	“The Avaliant mission is to use our engineering skills to assist our clients to develop products and capabilities that will make a difference for you, your company, community and…” 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 companies. 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 companies.
Partial evidence: Its own public description names part of software engineering companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name software engineering companies. 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 75 software engineering companies based in Bellevue, United States

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

As of Sep 6, 2026

17.5%Verified-email coverage

75.6Average contacts per company

11-50Median size (employees)

1060.0%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 75 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 companies, 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 companies”. 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 companies), 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 companies, 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, 992 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 companies 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 companies, 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 companies are there based in Bellevue, United States?

RevenueBase identified 75 software engineering companies 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 companies?

New York leads with 795 headquartered companies, followed by Austin (476) and Houston (469).

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 992 verified decision-maker contacts tracked across these 75 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.