Company lists · Data refreshed September 2026

Top 25 SaaS web developers based in Seattle, United States

Name: SaaS web developers based in Seattle, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 6, 2026 81 companies tracked

RevenueBase identified 81 SaaS web developers headquartered in Seattle, United States as of September 2026 and tracks 588 professional contacts across them, including 164 with verified work emails. Across the United States, New York is the largest hub for this category (416 companies); Seattle has 81.

This list covers SaaS web developers 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 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

81Companies

588Contacts tracked

164Verified emails

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The 25 largest SaaS web developers based in Seattle, United States

Ranked by team size

Top 25 of 81 SaaS web developers based in Seattle, United States, ranked by team size, largest first. Data refreshed Sep 6, 2026. RevenueBase Smart Search rates how each company's information relates to SaaS web developers: 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	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	51-200	135 contacts →
	Indirect 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 6, 2026
2	Ukad Umbraco, Optimizely And Azure Solution Partner	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	201-500	123 contacts →
	Indirect evidence “UKAD is a helping companies extend engineering capacity and deliver complex solutions with predictable outcomes.” Source: RevenueBase Database · checked Sep 6, 2026
3	Pubgenius INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	11-50	25 contacts →
	Indirect evidence “At pubGENIUS we build software that helps great ideas become real products.” Source: RevenueBase Database · checked Sep 6, 2026
4	NEW Normal	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 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 6, 2026
5	NWOS	Partial evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	1-10	20 contacts →
	Partial evidence “NWOS - Northwest Open Source provides Web application development and hosting across various industries.” Source: RevenueBase Database · checked Sep 6, 2026
6	SITG	Indirect evidence	Seattle, United StatesHQ checked Sep 6, 2026	11-50	19 contacts →
	Indirect evidence “SITG has experience and expertise in building complex Cloud & Enterprise applications esp.” Source: RevenueBase Database · checked Sep 6, 2026
7	Lunarbyte	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	1-10	12 contacts →
	Indirect 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 6, 2026
8	Fostec	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 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 6, 2026
9	Gols INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	11-50	7 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 6, 2026
10	Helpful Human	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	11-50	7 contacts →
	Indirect evidence “Helpful Human strategically cooperates with our clients to design and build digital products that bring people together.” Source: RevenueBase Database · checked Sep 6, 2026
11	Montana Banana WEB Design & Development	Partial evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	1-10	6 contacts →
	Partial evidence “Montana Banana is a Seattle-based web development company specializing in e-commerce integrations, user-friendly shopping experiences, web accessibility, and mobile apps.” Source: RevenueBase Database · checked Sep 6, 2026
12	Alpha Encoded	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	1-10	6 contacts →
	Indirect evidence “Based in the tech-centric city of Seattle, Alpha Encoded stands at the forefront of digital innovation.” Source: RevenueBase Database · checked Sep 6, 2026
13	Pacific Automation Group	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 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 6, 2026
14	Zaifworks LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	1-10	4 contacts →
	Indirect 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 6, 2026
15	Activated, INC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	1-10	3 contacts →
	Indirect evidence “Activated helps technology organizations apply AI across software, infrastructure, security, and product management.” Source: RevenueBase Database · checked Sep 6, 2026
16	Mahogany And Mango LLC	Partial evidence	Seattle, United StatesHQ checked Sep 6, 2026	1-10	3 contacts →
	Partial evidence “Helping small businesses and non-profit organizations build their online presence with custom-built websites & web applications.” Source: RevenueBase Database · checked Sep 6, 2026
17	ASMBL	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	51-200	3 contacts →
	Indirect evidence “At Assemble, our people are the source of our success.” Source: RevenueBase Database · checked Sep 6, 2026
18	Webkey	Partial evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	1-10	3 contacts →
	Partial evidence “Taking care of the needs of companies small and large on the web has been our business for over two decades.” Source: RevenueBase Database · checked Sep 6, 2026
19	White Brick	Indirect evidence	Seattle, United StatesHQ checked Sep 6, 2026	1-10	3 contacts →
	Indirect evidence “Since 2008 I have been producing websites, marketing, and tech infrastructure for small businesses in the Seattle area.” Source: RevenueBase Database · checked Sep 6, 2026
20	Konstankino Associates	Partial evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	1-10	3 contacts →
	Partial evidence “We utilize Software Development Life Cycle processes to produce web applications with the highest quality and lowest cost in the shortest time.” Source: RevenueBase Database · checked Sep 6, 2026
21	AA Cloud	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	11-50	2 contacts →
	Indirect evidence “Founded in 2014 by a group of young and ambitious tech-entrepreneurs, AA Cloud conceptualizes and implements creative cloud solutions tailored to your specific business needs.” Source: RevenueBase Database · checked Sep 6, 2026
22	Rogue POD LLC	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	1-10	2 contacts →
	Indirect evidence “Rogue Pod has over 20 years combined experience in custom software development.” Source: RevenueBase Database · checked Sep 6, 2026
23	Panolabs	Partial evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	1-10	2 contacts →
	Partial evidence “We are a full-stack Web development and technical consulting company based in Seattle, Washington.” Source: RevenueBase Database · checked Sep 6, 2026
24	Webonyx	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	11-50	2 contacts →
	Indirect evidence “WebOnyx is a software development company that specializes in building custom software.” Source: RevenueBase Database · checked Sep 6, 2026
25	Gosolid	Indirect evidence	Seattle, WA, United StatesHQ checked Sep 6, 2026	11-50	2 contacts →
	Indirect evidence “GoSolid is the authority in all things eCommerce.” Source: RevenueBase Database · 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: SaaS web developers. 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 SaaS web developers.
Partial evidence: Its own public description names part of SaaS web developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name SaaS web developers. 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 81 SaaS web developers based in Seattle, United States

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SaaS web developers based in Seattle, United States at a glance

As of Sep 6, 2026

27.9%Verified-email coverage

7.3Average contacts per company

1-10Median size (employees)

Sep 6, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

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 81 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 SaaS web developers, 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 “SaaS web developers”. 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 SaaS web developers), 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 SaaS web developers, 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, 164 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.

SaaS web developers 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 SaaS web developers, 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 SaaS web developers are there based in Seattle, United States?

RevenueBase identified 81 SaaS web developers 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 SaaS web developers?

New York leads the United States with 416 headquartered companies, followed by Austin (251) and Sheridan (184). Seattle has 81.

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 164 verified decision-maker contacts tracked across these 81 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.