Company lists · Data refreshed September 2026

Top 25 Product development firms based in the United States

Name: Product development firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 21, 2026 2,976 companies tracked

RevenueBase identified 2,976 product development firms headquartered in the United States as of September 2026 and tracks 39,146 professional contacts across them, including 12,747 with verified work emails. San Francisco is the largest hub.

This list covers product development firms 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 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 21, 2026 86% judged on-target in blind review

2,976Companies

39,146Contacts tracked

12,747Verified emails

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The 25 largest product development firms based in the United States

Ranked by team size

Top 25 of 2,976 product development firms based in the United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to product development 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	Plexus Corp	Partial evidence	Neenah, NC, United StatesHQ checked Sep 21, 2026	10001+	8,149 contacts →
	Partial evidence “Since 1979, Plexus has been partnering with companies to create the products that build a better world.” Source: RevenueBase Database · checked Sep 21, 2026
2	Benchmark	Partial evidence	Tempe, AZ, United StatesHQ checked Sep 21, 2026	10001+	5,362 contacts →
	Partial evidence “Benchmark is a worldwide provider of innovative product design, engineering services, technology solutions and advanced manufacturing services.” Source: RevenueBase Database · checked Sep 21, 2026
3	Janicki	Indirect evidence	Sedro-woolley, WA, United StatesHQ checked Sep 21, 2026	1,001-5,000	914 contacts →
	Indirect evidence “Janicki is a privately-owned engineering and manufacturing company with locations in Washington and Utah.” Source: RevenueBase Database · checked Sep 21, 2026
4	RFA Engineering	Indirect evidence	Eden Prairie, MN, United StatesHQ checked Sep 21, 2026	201-500	468 contacts →
	Indirect evidence “RFA serves 100's of clients ranging in size from Fortune 500 to entrepreneurial start-ups.” Source: RevenueBase Database · checked Sep 21, 2026
5	RCO Engineering	Indirect evidence	Roseville, MI, United StatesHQ checked Sep 21, 2026	501-1,000	438 contacts →
	Indirect evidence “Specializing in low-volume manufacturing that Tier 1 suppliers avoid, we offer complete program management under one roof, including emergency tooling and parts, large program…” Source: RevenueBase Database · checked Sep 21, 2026
6	Kaleidoscope Innovation	Strong evidence	Cincinnati, OH, United StatesHQ checked Sep 21, 2026	201-500	349 contacts →
	Strong evidence “When clients come to us for product design and development, they get a full range of technical expertise and laboratory resources, but they also get a team that’s relentless when…” Source: RevenueBase Database · checked Sep 21, 2026
7	Martech Medical Products, INC	Partial evidence	Harleysville, PA, United StatesHQ checked Sep 21, 2026	201-500	313 contacts →
	Partial evidence “MARTECH® MEDICAL PRODUCTS, INC.” Source: RevenueBase Database · checked Sep 21, 2026
8	Goods & Services	Partial evidence	Atlanta, GA, United StatesHQ checked Sep 21, 2026	201-500	290 contacts →
	Partial evidence “Goods & Services is a product design and engineering company.” Source: RevenueBase Database · checked Sep 21, 2026
9	Sigma Design	Indirect evidence	Camas, WA, United StatesHQ checked Sep 21, 2026	201-500	285 contacts →
	Indirect evidence “Sigma Design is where the best go to innovate.” Source: RevenueBase Database · checked Sep 21, 2026
10	Ascentec Engineering, LLC	Indirect evidence	Tualatin, OR, United StatesHQ checked Sep 21, 2026	201-500	272 contacts →
	Indirect evidence “Ascentec Engineering was founded in 2001 by a team of process and manufacturing engineers all with a solid background in electronics manufacturing processes.” Source: RevenueBase Database · checked Sep 21, 2026
11	rapidise.io	Partial evidence	Milpitas, CA, United StatesHQ checked Sep 21, 2026	n/a	232 contacts →
	Partial evidence “Rapidise.io is the world’s first and only AI & Blockchain-enabled TTaaS platform which accelerates product engineering by providing you with global access to companies with…” Source: RevenueBase Database · checked Sep 21, 2026
12	Andrews Cooper	Partial evidence	Mcminnville, OR, United StatesHQ checked Sep 21, 2026	51-200	199 contacts →
	Partial evidence “Partner with AC to Supercharge Your Technology Development Andrews Cooper is an engineering services firm in the Pacific Northwest specializing in highly complex technology…” Source: RevenueBase Database · checked Sep 21, 2026
13	Agilityio	Strong evidence	New York, NY, United StatesHQ checked Sep 21, 2026	201-500	183 contacts →
	Strong evidence “AgilityIO is a global design and development firm helping startups and enterprises turn bold ideas into impactful digital products.” Source: RevenueBase Database · checked Sep 21, 2026
14	Vantage Medtech	Partial evidence	Lenexa, KS, United StatesHQ checked Sep 21, 2026	201-500	173 contacts →
	Partial evidence “Vantage MedTech provides comprehensive design and manufacturing services, supporting the advancement of medical technologies from concept through to product realization.” Source: RevenueBase Database · checked Sep 21, 2026
15	Ryzen Solutions	Strong evidence	San Jose, CA, United StatesHQ checked Sep 21, 2026	201-500	169 contacts →
	Strong evidence “Since Ryzen Solutions has become a trusted provider to Silicon Valley’s growing product development community.” Source: RevenueBase Database · checked Sep 21, 2026
16	Teksun INC	Strong evidence	Santa Clara, CA, United StatesHQ checked Sep 21, 2026	201-500	165 contacts →
	Strong evidence “Established in 2014, Teksun Inc provides complete, end-to-end product development services, guiding you through the entire product development process from concept through…” Source: RevenueBase Database · checked Sep 21, 2026
17	Mecha INC	Partial evidence	Raleigh, NC, United StatesHQ checked Sep 21, 2026	n/a	157 contacts →
	Partial evidence “Mecha specializes in the design, analysis, and manufacturing of metal products for the embedded computer industry.” Source: RevenueBase Database · checked Sep 21, 2026
18	Waltonen Engineering	Indirect evidence	Warren, MI, United StatesHQ checked Sep 21, 2026	51-200	154 contacts →
	Indirect evidence “Established in 1957, Waltonen is a full-service design and engineering company with locations in Warren and Troy, Michigan.” Source: RevenueBase Database · checked Sep 21, 2026
19	RPG	Strong evidence	New York, United StatesHQ checked Sep 21, 2026	51-200	146 contacts →
	Strong evidence “RPG \| Building Brands, Products, Displays and Retail Environments from Concept to Consumer RPG is a global leader in the design, development, and manufacturing of Products…” Source: RevenueBase Database · checked Sep 21, 2026
20	Lake AIR Products	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 21, 2026	51-200	144 contacts →
	Indirect evidence “Your Advanced Manufacturing Partner.” Source: RevenueBase Database · checked Sep 21, 2026
21	Innovize	Strong evidence	Saint Paul, MN, United StatesHQ checked Sep 21, 2026	201-500	138 contacts →
	Strong evidence “Innovize offers custom development and manufacturing solutions – including converting and contract manufacturing – for product designers, developers, engineers and supply chain…” Source: RevenueBase Database · checked Sep 21, 2026
22	DFF Corporation, A Cadrex Company	Strong evidence	Agawam, MA, United StatesHQ checked Sep 21, 2026	201-500	135 contacts →
	Strong evidence “In 1969, DFF began serving customers with quality development and low-quantity production services-on time and at competitive prices.” Source: RevenueBase Database · checked Sep 21, 2026
23	Prefix Corporation	Indirect evidence	Rochester Hills, MI, United StatesHQ checked Sep 21, 2026	201-500	133 contacts →
	Indirect evidence “Michigan-based Prefix Corporation is a recognized leader in the creation of prototype designs, mock-ups, and full scale concept vehicles for the automotive and aviation industries.” Source: RevenueBase Database · checked Sep 21, 2026
24	Essai, INC	Indirect evidence	Fremont, CA, United StatesHQ checked Sep 21, 2026	51-200	123 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026
25	Paralect	Indirect evidence	Middletown, DE, United StatesHQ checked Sep 21, 2026	51-200	117 contacts →
	Indirect evidence “rated on Clutch.” Source: RevenueBase Database · checked Sep 21, 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: product development 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 product development firms.
Partial evidence: Its own public description names part of product development firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name product development 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 2,976 product development firms based in the United States

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Product development firms based in the United States at a glance

As of Sep 21, 2026

32.6%Verified-email coverage

13.2Average contacts per company

1-10Median size (employees)

2.3%Largest-city concentration · San Francisco

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

2,021

11-50

678

51-200

215

201-500

501-1,000

1,001-5,000

10001+

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 2,976 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 product development 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 the United States whose own description of what they do matches “product development 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 product development 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 product development firms, 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 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, 12,747 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 21, 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.

Product development firms by metro

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 product development 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 product development firms are there based in the United States?

RevenueBase identified 2,976 product development firms 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?

Plexus Corp, headquartered in Raleigh, tops this list with the largest team on record.

Which city has the most product development firms?

San Francisco leads with 69 headquartered companies, followed by New York (68) and Los Angeles (65).

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 12,747 verified decision-maker contacts tracked across these 2,976 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 21, 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.