Company lists · Data refreshed September 2026

Top 25 Custom software development consulting firms based in Bellevue, United States

Name: Custom software development consulting 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 24, 2026 75 companies tracked

RevenueBase identified 75 custom software development consulting firms headquartered in Bellevue, United States as of September 2026 and tracks 3,120 professional contacts across them, including 964 with verified work emails. Across the United States, New York is the largest hub for this category (1,174 companies); Bellevue has 75.

This list covers custom software development consulting 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 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

75Companies

3,120Contacts tracked

964Verified emails

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The 25 largest custom software development consulting firms based in Bellevue, United States

Ranked by team size

Top 25 of 75 custom software development consulting firms based in Bellevue, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to custom software development consulting 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	Unify Technologies	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	501-1,000	517 contacts →
	Indirect evidence “Unify Technologies is a digital engineering company delivering capabilities across Product Engineering, Enterprise Applications, and Managed IT Services.” Source: RevenueBase Database · checked Sep 24, 2026
2	AIM Consulting Group	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	501-1,000	398 contacts →
	Partial evidence “AIM Consulting, an Addison Group company, is an award-winning industry leader in technology consulting and solutions delivery.” Source: RevenueBase Database · checked Sep 24, 2026
3	Affirma	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	501-1,000	397 contacts →
	Indirect evidence “Affirma is an award-winning full service technology services firm based out of Bellevue, WA.” Source: RevenueBase Database · checked Sep 24, 2026
4	Inviso	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	201-500	239 contacts →
	Partial evidence “Inviso is a growing technology consulting firm that offers a wide range of business services for small to enterprise organizations across industries.” Source: RevenueBase Database · checked Sep 24, 2026
5	Congruent Software INC	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	201-500	210 contacts →
	Strong evidence “Founded in 1994, Congruent Software is a leading software development outsourcing company specialized in custom applications development, enterprise software, cloud computing, and…” Source: RevenueBase Database · checked Sep 24, 2026
6	Wallero	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	201-500	146 contacts →
	Partial evidence “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: RevenueBase Database · checked Sep 24, 2026
7	Prowess Consulting	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	51-200	134 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 24, 2026
8	Biblioso	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	201-500	102 contacts →
	Partial evidence “We started more than a decade ago focusing on supporting companies in the Pacific Northwest with IT consulting and documentation projects.” Source: RevenueBase Database · checked Sep 24, 2026
9	Softacom	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	51-200	77 contacts →
	Indirect evidence “Softacom is a full-cycle business app migration and modernization provider.” Source: RevenueBase Database · checked Sep 24, 2026
10	Coretek Labs	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	51-200	76 contacts →
	Partial evidence “Coretek Labs is a AI-focused software engineering partner that empowers organizations across the globe with innovative solutions, unparalleled execution capabilities and…” Source: RevenueBase Database · checked Sep 24, 2026
11	Tecace Software LTD	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	51-200	64 contacts →
	Strong evidence “TecAce is a company that specializes in software development and design.” Source: RevenueBase Database · checked Sep 24, 2026
12	Inabia Solutions And Consulting, INC	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	51-200	62 contacts →
	Indirect evidence “WHO Founded in 2006 and headquartered in Redmond, WA.” Source: RevenueBase Database · checked Sep 24, 2026
13	Knackhook	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	51-200	54 contacts →
	Indirect evidence “DIGITAL MASTERY REDEFINED.” Source: RevenueBase Database · checked Sep 24, 2026
14	Pacific Software Publishing, INC	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	11-50	42 contacts →
	Strong evidence “As an independent software design and development company, we use our technology to create software to help companies save and/or make money.” Source: RevenueBase Database · checked Sep 24, 2026
15	Adisys Corporation	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	51-200	34 contacts →
	Strong evidence “Adisys is a comprehensive management consulting organization that provides IT Product and Software development, vertical solutions, and outsourcing services.” Source: RevenueBase Database · checked Sep 24, 2026
16	Solutions Resource	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	11-50	33 contacts →
	Strong evidence “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: RevenueBase Database · checked Sep 24, 2026
17	WMI Worldwide	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	11-50	30 contacts →
	Strong evidence “WMI Worldwide is a technology and operations consulting firm, specializing in custom software and business process management solutions.” Source: RevenueBase Database · checked Sep 24, 2026
18	Adroit Business Solutions, INC	Indirect evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	51-200	28 contacts →
	Indirect evidence “Adroit Business Solutions is a technology outsourcing provider helping clients achieve their business objectives while deriving most value out of their investments.” Source: RevenueBase Database · checked Sep 24, 2026
19	Axelerate	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	51-200	17 contacts →
	Partial evidence “Axelerate is a Bellevue WA based management and technology consulting company that delivers comprehensive technology services and solutions to help clients achieve measurable…” Source: RevenueBase Database · checked Sep 24, 2026
20	Construx Software	Strong evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	11-50	15 contacts →
	Strong evidence “Construx provides insights, techniques, and recommendations through training and consulting on software development best practices.” Source: RevenueBase Database · checked Sep 24, 2026
21	Revivecloud LLC	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	11-50	15 contacts →
	Partial evidence “ReviveCloud LLC - formerly Kalotas is a Tier 1 Microsoft Partner and one of the leading IT consulting firm in Seattle, WA.” Source: RevenueBase Database · checked Sep 24, 2026
22	Fiduciary Technology Solutions	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	51-200	15 contacts →
	Partial evidence “Founded in 2015, Fiduciary Tech is a technology consultancy specializing in Salesforce solutions, cloud-native application development on AWS, system integrations, data platforms…” Source: RevenueBase Database · checked Sep 24, 2026
23	Teal Group Technologies, INC	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	11-50	14 contacts →
	Partial evidence “Teal Group Technologies provides IT consulting, technology solution and support services for small and medium-sized businesses.” Source: RevenueBase Database · checked Sep 24, 2026
24	Ideateq INC	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	1-10	12 contacts →
	Partial evidence “An enterprise product development company building digital solutions for enterprises across various industries covering the world markets.” Source: RevenueBase Database · checked Sep 24, 2026
25	Muse & Gordon	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 24, 2026	11-50	8 contacts →
	Partial evidence “At Muse & Gordon, we put people at the center of every engagement to create a consulting experience grounded in partnership, clarity, and action.” 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: custom software development consulting 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 custom software development consulting firms.
Partial evidence: Its own public description names part of custom software development consulting firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom software development consulting 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 75 custom software development consulting firms based in Bellevue, United States

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Custom software development consulting firms based in Bellevue, United States at a glance

As of Sep 24, 2026

30.9%Verified-email coverage

41.6Average contacts per company

11-50Median size (employees)

Sep 24, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Email recency for this list is measured across the whole United States list rather than for Bellevue, 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 custom software development consulting 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 “custom software development consulting 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 custom software development consulting 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 custom software development consulting 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, 964 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.

Custom software development consulting 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 custom software development consulting 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 custom software development consulting firms are there based in Bellevue, United States?

RevenueBase identified 75 custom software development consulting 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?

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

Which city in the United States has the most custom software development consulting firms?

New York leads the United States with 1,174 headquartered companies, followed by Austin (678) and Houston (589). Bellevue has 75.

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 964 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 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.