Company lists · Data refreshed September 2026

Top 25 Responsive web design agencies based in the United States

Name: Responsive web design agencies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 971 companies tracked

RevenueBase identified 971 responsive web design agencies headquartered in the United States as of September 2026 and tracks 4,608 professional contacts across them, including 835 with verified work emails and 1,133 with mobile numbers. New York is the largest hub.

This list covers responsive web design agencies headquartered in the 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

971Companies

4,608Contacts tracked

835Verified emails

1,133Mobile numbers

Explore all 971 companies → Free signup · no credit card · 500 free credits

The 25 largest responsive web design agencies based in the United States

Ranked by team size

Top 25 of 971 responsive web design agencies based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names responsive web design agencies: 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.
#	Company	Headquarters	Employees	Contacts
1	Webappclouds LLCPartial evidence	Cherry Hill, NJ, United StatesHQ checked Sep 5, 2026	201-500	186
	“Webappclouds takes mobile apps and web apps to the next level.” Source: company website · checked Sep 5, 2026
2	IntegrityPartial evidence	Saint Louis, MO, United StatesHQ checked Sep 5, 2026	51-200	164
	“Integrity crafts compelling user experiences for startups and enterprise clients across iPhone, iPad, Android and the web.” Source: company website · checked Sep 5, 2026
3	Happy COGPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	51-200	100
	“We design, build, and market websites, apps, digital products, & experiences.” Source: company website · checked Sep 5, 2026
4	Fleet StudioIndirect evidence	Princeton, NJ, United StatesHQ checked Sep 5, 2026	51-200	55
	“We are technologists, creatives, and strategists that build great product experiences.” Source: company website · checked Sep 5, 2026
5	WedowebappsPartial evidence	Hallandale Beach, FL, United StatesHQ checked Sep 5, 2026	51-200	52
	“WEDOWEBAPPS is enthusiastic about website development and design, and we always try to create a tailored solution for your professional need.” Source: company website · checked Sep 5, 2026
6	Design MonksStrong evidence	Mount Arlington, NJ, United StatesHQ checked Sep 5, 2026	11-50	42
	“Design Monks LLC is a leading UI/UX and web design agency helping brands create high-impact digital experiences.” Source: company website · checked Sep 5, 2026
7	Embtel Solutions INCStrong evidence	Fremont, CA, United StatesHQ checked Sep 5, 2026	11-50	40
	“Embtel Solutions is a Web Design Agency, Headquartered in Fremont, California with services of Digital Marketing and App Development focused on growing brands online.” Source: company website · checked Sep 5, 2026
8	WebcontentorPartial evidence	Billerica, MA, United StatesHQ checked Sep 5, 2026	11-50	34
	“Webcontentor creates and delivers Web Solutions, Mobile Applications and Digital Campaigns for your growing enterprise or new venture.” Source: company website · checked Sep 5, 2026
9	DextersolPartial evidence	San Diego, CA, United StatesHQ checked Sep 5, 2026	11-50	30
	“Dextersol is a high-quality and creative web development company.” Source: company website · checked Sep 5, 2026
10	UnleashedPartial evidence	Columbia, MD, United StatesHQ checked Sep 5, 2026	11-50	29
	“Unleashed is a one-stop shop for leading web development, custom software and digital services.” Source: company website · checked Sep 5, 2026
11	Six2eightPartial evidence	Clayton, NC, United StatesHQ checked Sep 5, 2026	11-50	26
	“We design UI UX for digital products and develop high-performing websites that drive real business results.” Source: company website · checked Sep 5, 2026
12	SpiceblueIndirect evidence	Newark, DE, United StatesHQ checked Sep 5, 2026	11-50	26
	“At Spiceblue, we strive at redefining how the users interact with digital applications, by making the interfaces aesthetically pleasing and visually appealing.” Source: company website · checked Sep 5, 2026
13	Citrus StudiosPartial evidence	Santa Monica, CA, United StatesHQ checked Sep 5, 2026	11-50	25
	“Citrus Studios is an award-winning interactive design, development, and consulting firm based in Los Angeles.” Source: company website · checked Sep 5, 2026
14	PmsltechStrong evidence	Princeton, NJ, United StatesHQ checked Sep 5, 2026	51-200	25
	“Pmsl Technology, established in 2010, is Princeton, NJ & Bhubaneswar, India based Digital Interactive Agency specializing in UI/UX Design & Development, Mobile/Web Application…” Source: company website · checked Sep 5, 2026
15	Sanctuary Computer INCIndirect evidence	New York City, NY, United StatesHQ checked Sep 5, 2026	11-50	24
	“Sanctuary Computer is an thoughtful user interface studio on the Bowery in New York City.” Source: company website · checked Sep 5, 2026
16	NewcityIndirect evidence	Blacksburg, VA, United StatesHQ checked Sep 5, 2026	11-50	22
	“At NewCity, we build websites, applications, systems, platforms, and online experiences.” Source: company website · checked Sep 5, 2026
17	OctopusPartial evidence	Santa Cruz, CA, United StatesHQ checked Sep 5, 2026	11-50	22
	“Adaptive by nature, intelligent by design.” Source: company website · checked Sep 5, 2026
18	SparkartIndirect evidence	Oakland, CA, United StatesHQ checked Sep 5, 2026	11-50	20
	“Sparkart is a digital agency in Oakland, CA.” Source: company website · checked Sep 5, 2026
19	JLOOPIndirect evidence	Long Beach, CA, United StatesHQ checked Sep 5, 2026	11-50	18
	“JLOOP is a creative technology and development firm that specializes in creating memorable online experiences, primarily in the mobile space.” Source: company website · checked Sep 5, 2026
20	TWO Point ONEIndirect evidence	New Hyde Park, NY, United StatesHQ checked Sep 5, 2026	11-50	18
	“Two Point One is a global agency that accelerates businesses by creating unified, device-agnostic brand experiences.” Source: company website · checked Sep 5, 2026
21	Griffo HouseStrong evidence	Boise, ID, United StatesHQ checked Sep 5, 2026	1-10	18
	“At Griffo House, we specialize in graphic design, UI/UX design, and web development.” Source: company website · checked Sep 5, 2026
22	SparkboxStrong evidence	Bellbrook, OH, United StatesHQ checked Sep 5, 2026	11-50	17
	“Our expertise includes- Responsive Web Design - Custom Web Application Development - Accessibility - Design Systems - Security - User Interface Design - User Experience - Content…” Source: company website · checked Sep 5, 2026
23	The Frontend CompanyIndirect evidence	Covina, CA, United StatesHQ checked Sep 5, 2026	11-50	17
	“Welcome to The Frontend Company (formerly known as AVA.codes).” Source: company website · checked Sep 5, 2026
24	SLICKPartial evidence	San Jose, United StatesHQ checked Sep 5, 2026	11-50	17
	“Leading UI/UX Design and Product Development Agency” Source: company website · checked Sep 5, 2026
25	GROWPartial evidence	Auburn, CA, United StatesHQ checked Sep 5, 2026	11-50	15
	“GROW is a team of thinkers and doers that bring together design, technology, and communications.” Source: company website · checked Sep 5, 2026

Showing 25 of 971 responsive web design agencies based in the United States

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Responsive web design agencies based in the United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 68 HQs

1,133Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

731

11-50

199

51-200

201-500

501-1,000

10001+

Verified emails by last verification

0–30

770

31–60

61–90

90–180

180+

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 responsive web design agencies, 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 the United States whose own description of what they do matches “responsive web design agencies”. 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 responsive web design agencies, and records with no verified work email. Companies headquartered outside United States 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, 835 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.

Responsive web design agencies by metro

Responsive web design agencies in New York68
Responsive web design agencies in Los Angeles31

Frequently asked

How many responsive web design agencies are there based in the United States?

RevenueBase identified 971 responsive web design agencies headquartered in the 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?

Webappclouds LLC, headquartered in Cherry Hill, tops this list with the largest team on record.

Which city has the most responsive web design agencies?

New York leads with 68 headquartered companies, followed by Los Angeles (31) and Chicago (21).

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 835 verified decision-maker contacts tracked across these 971 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.

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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.