Company lists · Data refreshed September 2026

Top 25 Prototype manufacturers based in the United States

Name: Prototype manufacturers based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 1,234 companies tracked

RevenueBase identified 1,234 prototype manufacturers headquartered in the United States as of September 2026 and tracks 9,679 professional contacts across them, including 3,136 with verified work emails. New York is the largest hub.

This list covers prototype manufacturers 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 17, 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 17, 2026 86% judged on-target in blind review

1,234Companies

9,679Contacts tracked

3,136Verified emails

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The 25 largest prototype manufacturers based in the United States

Ranked by team size

Top 25 of 1,234 prototype manufacturers based in the United States, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to prototype manufacturers: 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	Carbon	Indirect evidence	Redwood City, CA, United StatesHQ checked Sep 17, 2026	201-500	423 contacts →
	Indirect evidence “The Idea-to-Production Platform Rapidly design, develop and scale production of better products in less time with the Carbon platform.” Source: RevenueBase Database · checked Sep 17, 2026
2	Markforged	Indirect evidence	Waltham, MA, United StatesHQ checked Sep 17, 2026	201-500	273 contacts →
	Indirect evidence “At Markforged, we are on a mission to unlock the next 10x innovation in design and manufacturing.” Source: RevenueBase Database · checked Sep 17, 2026
3	GSC	Indirect evidence	Germantown, WI, United StatesHQ checked Sep 17, 2026	51-200	196 contacts →
	Indirect evidence “GSC provides comprehensive engineering solutions, with a seamless, integrated workflow, for every aspect of product development – design, simulation, 3D printing, communication…” Source: RevenueBase Database · checked Sep 17, 2026
4	Quickparts	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	201-500	182 contacts →
	Partial evidence “Custom Prototypes, 3D Printing, and On-Demand Parts Manufacturing.” Source: RevenueBase Database · checked Sep 17, 2026
5	FMT	Indirect evidence	Findlay, OH, United StatesHQ checked Sep 17, 2026	51-200	153 contacts →
	Indirect evidence “FMT is your strategic partner in high-quality plastic parts manufacturing.” Source: RevenueBase Database · checked Sep 17, 2026
6	Lake AIR Products	Indirect evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 2026	51-200	144 contacts →
	Indirect evidence “Your Advanced Manufacturing Partner.” Source: RevenueBase Database · checked Sep 17, 2026
7	Essai, INC	Indirect evidence	Fremont, CA, United StatesHQ checked Sep 17, 2026	51-200	123 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
8	Complete Prototype Services	Strong evidence	Clinton Township, MI, United StatesHQ checked Sep 17, 2026	51-200	119 contacts →
	Strong evidence “CPS is an ISO certified manufacturer of prototype and limited production parts and tooling for a variety of industries.” Source: RevenueBase Database · checked Sep 17, 2026
9	3-Dimensional Services Group	Partial evidence	Rochester Hills, MI, United StatesHQ checked Sep 17, 2026	501-1,000	109 contacts →
	Partial evidence “The 3-Dimensional Services Group specializes in manufacturing metal and plastic prototype and low-volume production parts and assemblies.” Source: RevenueBase Database · checked Sep 17, 2026
10	Padt, INC	Partial evidence	Tempe, AZ, United StatesHQ checked Sep 17, 2026	51-200	87 contacts →
	Partial evidence “PADT provides mechanical engineering products and services to companies that design and manufacture physical products.” Source: RevenueBase Database · checked Sep 17, 2026
11	KEY Tech INC	Partial evidence	Baltimore, MD, United StatesHQ checked Sep 17, 2026	51-200	72 contacts →
	Partial evidence “Founded in 1998, Key Tech is a high-tech product design and prototyping company located in Baltimore, Maryland.” Source: RevenueBase Database · checked Sep 17, 2026
12	Bravo Team Engineering Design & Fabrication	Indirect evidence	Cornelius, NC, United StatesHQ checked Sep 17, 2026	51-200	63 contacts →
	Indirect evidence “Elevate Your Engineering Vision with Bravo Team LLC Are you seeking innovative solutions to turn your engineering dreams into reality?” Source: RevenueBase Database · checked Sep 17, 2026
13	Viable Engineering Solutions	Indirect evidence	Orlando, FL, United StatesHQ checked Sep 17, 2026	51-200	62 contacts →
	Indirect evidence “The Innovation Center by Viable Engineering Solutions is a world-class industrial rapid solution concept-to-completion center for the industrial market.” Source: RevenueBase Database · checked Sep 17, 2026
14	Rapid, A Proto Labs Company	Indirect evidence	Nashua, NH, United StatesHQ checked Sep 17, 2026	201-500	56 contacts →
	Indirect evidence “Rapid was acquired by Protolabs and rebranded Rapid, a Protolabs Company on 12/1/2017.” Source: RevenueBase Database · checked Sep 17, 2026
15	KEK Design	Indirect evidence	Rochester, NY, United StatesHQ checked Sep 17, 2026	11-50	55 contacts →
	Indirect evidence “KEK Design is a full-service industrial design and product development consultancy located in Rochester, New York.” Source: RevenueBase Database · checked Sep 17, 2026
16	Cadimensions, INC	Indirect evidence	East Syracuse, NY, United StatesHQ checked Sep 17, 2026	51-200	53 contacts →
	Indirect evidence “CADimensions offers 3D printing, industrial design, simulation, training and other engineering and manufacturing services for anyone with an idea.” Source: RevenueBase Database · checked Sep 17, 2026
17	Whiteclouds	Indirect evidence	Uintah, UT, United StatesHQ checked Sep 17, 2026	51-200	51 contacts →
	Indirect evidence “Now hiring!” Source: RevenueBase Database · checked Sep 17, 2026
18	Duggan Manufacturing	Partial evidence	Shelby Township, MI, United StatesHQ checked Sep 17, 2026	51-200	50 contacts →
	Partial evidence “We elevate and accelerate prototyping to production, but our ability to take on challenges is at the heart of everything we do.” Source: RevenueBase Database · checked Sep 17, 2026
19	Uptive Manufacturing	Indirect evidence	Libertyville, IL, United StatesHQ checked Sep 17, 2026	51-200	49 contacts →
	Indirect evidence “You may also know us as GoProto, RE3DTECH, Phoenix Proto Technologies and/or Stanfordville Machining and Manufacturing.” Source: RevenueBase Database · checked Sep 17, 2026
20	Fusion Design	Indirect evidence	Campbell, CA, United StatesHQ checked Sep 17, 2026	11-50	47 contacts →
	Indirect evidence “FusionDesign is a full service product development company located in Silicon Valley.” Source: RevenueBase Database · checked Sep 17, 2026
21	Schultes Precision Manufacturing, INC	Indirect evidence	Buffalo Grove, IL, United StatesHQ checked Sep 17, 2026	51-200	47 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 17, 2026
22	Omega Plastics, INC	Partial evidence	Clinton Township, MI, United StatesHQ checked Sep 17, 2026	51-200	45 contacts →
	Partial evidence “Omega Plastics is a leader in tooling and injection molding solutions for prototype/product development through low to medium volume production applications.” Source: RevenueBase Database · checked Sep 17, 2026
23	Designcraft, INC	Partial evidence	Lake Zurich, IL, United StatesHQ checked Sep 17, 2026	11-50	45 contacts →
	Partial evidence “Designcraft offers specialty services for professional companies engaged in Prototyping, New Product Development and Rapid Manufacturing.” Source: RevenueBase Database · checked Sep 17, 2026
24	KR Anderson, Inc. Krafab	Partial evidence	Morgan Hill, CA, United StatesHQ checked Sep 17, 2026	11-50	45 contacts →
	Partial evidence “Through superior customer service, quick quote response time, and rapid turn of prototype and production parts of exceptional quality, K.R.” Source: RevenueBase Database · checked Sep 17, 2026
25	Sherpa Design	Indirect evidence	Portland, OR, United StatesHQ checked Sep 17, 2026	11-50	44 contacts →
	Indirect evidence “Our Mission: Exploration Sherpa Design is a team of engineers, designers, and machinists who are dedicated to helping your business push the mechanical and technological envelope.” Source: RevenueBase Database · checked Sep 17, 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: prototype manufacturers. 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 prototype manufacturers.
Partial evidence: Its own public description names part of prototype manufacturers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name prototype manufacturers. 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 1,234 prototype manufacturers based in the United States

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Prototype manufacturers based in the United States at a glance

As of Sep 17, 2026

32.4%Verified-email coverage

7.8Average contacts per company

1-10Median size (employees)

1.9%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

879

11-50

270

51-200

201-500

501-1,000

1,001-5,000

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 1,234 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 prototype manufacturers, 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 “prototype manufacturers”. 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 prototype manufacturers), 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 prototype manufacturers, 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, 3,136 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 17, 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.

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 prototype manufacturers, 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 prototype manufacturers are there based in the United States?

RevenueBase identified 1,234 prototype manufacturers 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?

Carbon, headquartered in Redwood City, tops this list with the largest team on record.

Which city has the most prototype manufacturers?

New York leads with 24 headquartered companies, followed by Chicago (18) and Los Angeles (17).

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 3,136 verified decision-maker contacts tracked across these 1,234 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 17, 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.