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Company lists · Data refreshed September 2026

Top 25 Platform building firms based in Washington, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 74 companies tracked

RevenueBase identified 74 platform building firms headquartered in Washington, United States as of September 2026 and tracks 539 professional contacts across them, including 178 with verified work emails. New York is the largest hub.

This list covers platform building firms headquartered in Washington, 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 5, 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 5, 2026 86% judged on-target in blind review
74Companies
539Contacts tracked
178Verified emails
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The 25 largest platform building firms based in Washington, United States

Ranked by team size
Top 25 of 74 platform building firms based in Washington, United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names platform building firms: 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
Interactive StrategiesIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20087

“Interactive Strategies is a full service digital agency whose strength lies in understanding the complex relationship that exists between strategy, design, content, usability…”

Source: company website · checked Sep 5, 2026
2
Design In DCIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5041

“Based in the heart of Washington DC, we are a dynamic and innovative full-service Web Design & Creative Agency committed to transforming your vision into a captivating digital…”

Source: company website · checked Sep 5, 2026
3
TahzooIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20040

“Tahzoo is a globally recognized digital transformation agency that simplifies the customer experience through strategic innovation, experience design, and technology.”

Source: company website · checked Sep 5, 2026
4
mobilize.netIndirect evidence
Washington, WA, United StatesHQ checked Sep 5, 2026201-50030

“Mobilize.Net is now part of GAP.”

Source: company website · checked Sep 5, 2026
5
Stratesfy, INCIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-20026

“Stratesfy is a global technology innovator that empowers organizations to build, integrate, and scale modern digital solutions with intelligence, agility, and performance.”

Source: company website · checked Sep 5, 2026
6
Imajine LLCIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5025

“Founded in 2010, Imajine is a full-service web and mobile design/development company.”

Source: company website · checked Sep 5, 2026
7
45 RPMIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5016

“45/RPM is a digital agency with a track record of delivering complex websites and highly successful digital marketing campaigns for demanding high-growth companies.”

Source: company website · checked Sep 5, 2026
8
Strategic IT PartnersIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5013

“Strategic IT Partners (SIP) stands at the forefront of software development and IT consulting, delivering bespoke, high-performance solutions that empower businesses to achieve…”

Source: company website · checked Sep 5, 2026
9
Linchpin Software LLCIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-5011

“Linchpin Software LLC is a solutions provider specializing in software architecture, cloud computing, enterprise application development, and custom user experience.”

Source: company website · checked Sep 5, 2026
10
ThinknimbleIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-509

“ThinkNimble is a design and software development agency that turns clients into confident tech leaders who understand their customers and build better solutions.”

Source: company website · checked Sep 5, 2026
11
NCLUDIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-2008

“We are nclud - A Provocative Creative Agency Founded in 1998, nclud is an interactive agency that has been around for almost as long as the Internet itself.”

Source: company website · checked Sep 5, 2026
12
MESHUIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-507

“Architects, advisors, and implementors of brands, experiences, and technology.”

Source: company website · checked Sep 5, 2026
13
EnovationalPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-2007

“Enovational pushes the boundaries between technology, user experience, and design by building beautiful, user-friendly products that have achieved international recognition and…”

Source: company website · checked Sep 5, 2026
14
TOO Darn Loud Digital MarketingIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-106

“We are passionate about delivering innovative designs customized to our client’s brand and business focus.”

Source: company website · checked Sep 5, 2026
15
UxshiftIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-505

“Good design doesn't just look good, it works beautifully.”

Source: company website · checked Sep 5, 2026
16
Fifth TribeIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-504

“Based out of startup accelerator 1776, Fifth Tribe is a digital agency that serves businesses, government agencies, and nonprofits.”

Source: company website · checked Sep 5, 2026
17
Oaktree AppsIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-104

“We are a leading IT consulting services company, specializing in web/mobile application development, cloud computing, and blockchain.”

Source: company website · checked Sep 5, 2026
18
District InteractiveIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-504

“We are District Interactive.”

Source: company website · checked Sep 5, 2026
19
BuildinaryPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-103

“Buildinary is a comprehensive App Development Solution.”

Source: company website · checked Sep 5, 2026
20
AlchemicodeIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-103

“We are a team of lifelong programmers and digital hobbyists.”

Source: company website · checked Sep 5, 2026
21
Scotch DigitalIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-103

“Top Shelf Web Design & Development - We are creative thinkers with a focus on modern web production.”

Source: company website · checked Sep 5, 2026
22
GunpowderlabsIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 202611-502

“We’ve helped startups build and launch products from scratch, augmented existing development teams to ship better features more quickly, and developed tools to help organizations…”

Source: company website · checked Sep 5, 2026
23
PerphicIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-102

“Shaping digital experiences for the world’s leading brands.”

Source: company website · checked Sep 5, 2026
24
CreatorshdIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-101

“CreatorsHD, is a digital agency dedicated to developing and/or improving the brand of small businesses, start-ups and non-profits, with a specialty in; website development, social…”

Source: company website · checked Sep 5, 2026
25
Fabulous Apps LLCIndirect evidence
Washington, DC, United StatesHQ checked Sep 5, 20261-101

“At Fabulous Apps, your success is our success.”

Source: company website · checked Sep 5, 2026

Showing 25 of 74 platform building firms based in Washington, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 178 reachable decision-makers.

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Platform building firms based in Washington, United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
New YorkLargest hub · 801 HQs
Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
41
11-50
23
51-200
8
201-500
1
501-1,000
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 Washington, over 74 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 platform building firms, 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 Washington, United States whose own description of what they do matches “platform building firms”. 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 platform building firms, and records with no verified work email. Companies headquartered outside Washington 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, 178 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 5, 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.

Platform building firms by metro in the United States

Frequently asked

How many platform building firms are there based in Washington, United States?

RevenueBase identified 74 platform building firms headquartered in Washington, 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?

Interactive Strategies, headquartered in Washington, tops this list with the largest team on record.

Which city has the most platform building firms?

New York leads with 801 headquartered companies, followed by Austin (358) and Los Angeles (354).

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 178 verified decision-maker contacts tracked across these 74 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 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 74 platform building firms based in Washington, United States. Start with a free account, no credit card.

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Related lists

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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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