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Company lists · Data refreshed September 2026

Top 25 SaaS web developers based in Seattle, United States

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. New York is the largest hub.

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, how directly it supports the match, 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 SmartSearch, 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 Match evidence on every row Refreshed Sep 6, 2026 86% judged on-target in blind review
81Companies
588Contacts tracked
164Verified emails
Explore all 81 companies → Free signup · no credit card · 500 free credits

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. Evidence rates how directly each company's own description names SaaS web developers: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
White Rabbit GroupIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 202651-200135

“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: company website · checked Sep 6, 2026
2
Ukad Umbraco, Optimizely And Azure Solution PartnerIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 2026201-500123

“UKAD is a helping companies extend engineering capacity and deliver complex solutions with predictable outcomes.”

Source: company website · checked Sep 6, 2026
3
Pubgenius INCIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 202611-5025

“At pubGENIUS we build software that helps great ideas become real products.”

Source: company website · checked Sep 6, 2026
4
NEW NormalIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 202611-5025

“NewNormal builds custom software and lasting partnerships Since 2012 we’ve helped clients turn ideas into products that scale.”

Source: company website · checked Sep 6, 2026
5
NWOSPartial evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-1020

“NWOS - Northwest Open Source provides Web application development and hosting across various industries.”

Source: company website · checked Sep 6, 2026
6
SITGIndirect evidence
Seattle, United StatesHQ checked Sep 6, 202611-5019

“SITG has experience and expertise in building complex Cloud & Enterprise applications esp.”

Source: company website · checked Sep 6, 2026
7
LunarbyteIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-1012

“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: company website · checked Sep 6, 2026
8
FostecIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-108

“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: company website · checked Sep 6, 2026
9
Gols INCIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 202611-507
Source: company website · checked Sep 6, 2026
10
Helpful HumanIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 202611-507

“Helpful Human strategically cooperates with our clients to design and build digital products that bring people together.”

Source: company website · checked Sep 6, 2026
11
Montana Banana WEB Design & DevelopmentPartial evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-106

“Montana Banana is a Seattle-based web development company specializing in e-commerce integrations, user-friendly shopping experiences, web accessibility, and mobile apps.”

Source: company website · checked Sep 6, 2026
12
Alpha EncodedIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-106

“Based in the tech-centric city of Seattle, Alpha Encoded stands at the forefront of digital innovation.”

Source: company website · checked Sep 6, 2026
13
Pacific Automation GroupIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-104

“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: company website · checked Sep 6, 2026
14
Zaifworks LLCIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-104

“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: company website · checked Sep 6, 2026
15
Activated, INCIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-103

“Activated helps technology organizations apply AI across software, infrastructure, security, and product management.”

Source: company website · checked Sep 6, 2026
16
Mahogany And Mango LLCPartial evidence
Seattle, United StatesHQ checked Sep 6, 20261-103

“Helping small businesses and non-profit organizations build their online presence with custom-built websites & web applications.”

Source: company website · checked Sep 6, 2026
17
ASMBLIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 202651-2003

“At Assemble, our people are the source of our success.”

Source: company website · checked Sep 6, 2026
18
WebkeyPartial evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-103

“Taking care of the needs of companies small and large on the web has been our business for over two decades.”

Source: company website · checked Sep 6, 2026
19
White BrickIndirect evidence
Seattle, United StatesHQ checked Sep 6, 20261-103

“Since 2008 I have been producing websites, marketing, and tech infrastructure for small businesses in the Seattle area.”

Source: company website · checked Sep 6, 2026
20
Konstankino AssociatesPartial evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-103

“We utilize Software Development Life Cycle processes to produce web applications with the highest quality and lowest cost in the shortest time.”

Source: company website · checked Sep 6, 2026
21
AA CloudIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 202611-502

“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: company website · checked Sep 6, 2026
22
Rogue POD LLCIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-102

“Rogue Pod has over 20 years combined experience in custom software development.”

Source: company website · checked Sep 6, 2026
23
PanolabsPartial evidence
Seattle, WA, United StatesHQ checked Sep 6, 20261-102

“We are a full-stack Web development and technical consulting company based in Seattle, Washington.”

Source: company website · checked Sep 6, 2026
24
WebonyxIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 202611-502

“WebOnyx is a software development company that specializes in building custom software.”

Source: company website · checked Sep 6, 2026
25
GosolidIndirect evidence
Seattle, WA, United StatesHQ checked Sep 6, 202611-502

“GoSolid is the authority in all things eCommerce.”

Source: company website · checked Sep 6, 2026

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
1-10Median size (employees)
New YorkLargest hub · 416 HQs
Contacts with mobile numbers
Sep 6, 2026Data refreshed

Companies by employee count

1-10
55
11-50
22
51-200
3
201-500
1

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 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 evidence 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 SmartSearch, 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.
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 an evidence 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

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 has the most SaaS web developers?

New York leads with 416 headquartered companies, followed by Austin (251) and Sheridan (184).

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.

Ready to reach these companies? Verified emails and direct dials for all 81 SaaS web developers based in Seattle, United States. Start with a free account, no credit card.

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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 SmartSearch, 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.

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