Company lists · Data refreshed September 2026

Top 25 Engineering outsourcing firms based in San Francisco, United States

Name: Engineering outsourcing firms based in San Francisco, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 72 companies tracked

RevenueBase identified 72 engineering outsourcing firms headquartered in San Francisco, United States as of September 2026 and tracks 571 professional contacts across them, including 178 with verified work emails. Across the United States, Houston is the largest hub for this category (123 companies); San Francisco has 72.

This list covers engineering outsourcing firms headquartered in San Francisco, 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 28, 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 28, 2026 86% judged on-target in blind review

72Companies

571Contacts tracked

178Verified emails

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The 25 largest engineering outsourcing firms based in San Francisco, United States

Ranked by team size

Top 25 of 72 engineering outsourcing firms based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to engineering outsourcing 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	Synapse Product Development	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	103 contacts →
	Partial evidence “Synapse Product Development solves the most difficult engineering challenges from concept through manufacturing for the leading entertainment, consumer electronics, life-sciences…” Source: RevenueBase Database · checked Sep 28, 2026
2	Treinetic	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	79 contacts →
	Partial evidence “Treinetic™ is a leading software product engineering and technology consulting company, recognized for its innovative and award-winning solutions.” Source: RevenueBase Database · checked Sep 28, 2026
3	Whipsaw	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	33 contacts →
	Indirect evidence “Whipsaw is an award-winning product design and innovation firm based in San Francisco, creating at the intersection of physical, digital, and brand.” Source: RevenueBase Database · checked Sep 28, 2026
4	Swope Design Solutions	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	23 contacts →
	Partial evidence “We are nimble team of engineers with over 30 years of engineering experience and a track record of delivering high-quality engineering solutions.” Source: RevenueBase Database · checked Sep 28, 2026
5	APROE	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	15 contacts →
	Partial evidence “Advanced Prototype Engineering is a San Francisco-based design and engineering firm specializing in the development of mechanical and mechatronic prototypes, machine shop setup…” Source: RevenueBase Database · checked Sep 28, 2026
6	Branch	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	12 contacts →
	Indirect evidence “Branch is an industrial design and branding agency in San Francisco.” Source: RevenueBase Database · checked Sep 28, 2026
7	Alloy Product Development	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Indirect evidence “THANK YOU * To our current and former team members: Every one of you added an element to Alloy to make it stronger, smarter and better.” Source: RevenueBase Database · checked Sep 28, 2026
8	Autoroboto	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “We are a consulting firm that specializes in engineering and management.” Source: RevenueBase Database · checked Sep 28, 2026
9	Evline	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	11 contacts →
	Partial evidence “Evline (evline.io) is a highly-regarded, comprehensive product design and engineering firm, operating in Silicon Valley since 2017.” Source: RevenueBase Database · checked Sep 28, 2026
10	Prophet Town	Partial evidence	San Francisco, United StatesHQ checked Sep 28, 2026	11-50	8 contacts →
	Partial evidence “Prophet Town is a unique IT engineering and technology partner you can trust.” Source: RevenueBase Database · checked Sep 28, 2026
11	Embedded Artistry	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “Our Mission: We create high quality, thoroughly tested, and well-documented firmware for our clients.” Source: RevenueBase Database · checked Sep 28, 2026
12	Design Committee	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	6 contacts →
	Indirect evidence “Design Committee is a focused team of designers & engineers based in San Francisco.” Source: RevenueBase Database · checked Sep 28, 2026
13	Unbox Product Design	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Unbox Product Design is an international award-winning, full-stack product development firm based in the San Francisco Bay Area, specializing in industrial design, product…” Source: RevenueBase Database · checked Sep 28, 2026
14	QUOR	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “We build products that drive growth and stability.” Source: RevenueBase Database · checked Sep 28, 2026
15	Surya Design, LLC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Sandheep Surendran, Principal of Surya Design, LLC, has over 25 years of product development experience in industries from toys and consumer electronics to biotech, automotive…” Source: RevenueBase Database · checked Sep 28, 2026
16	Apogii INC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Apogii is a technology consulting company specializing in helping clients envision, build and launch innovative products.” Source: RevenueBase Database · checked Sep 28, 2026
17	Emergent Cognition	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	3 contacts →
	Indirect evidence “We are expert digital product developers and software engineers ready to bring your vision to life.” Source: RevenueBase Database · checked Sep 28, 2026
18	ZOE Design Associates	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Indirect evidence “Zoe Design Associates is an award-winning product design consultancy.” Source: RevenueBase Database · checked Sep 28, 2026
19	Neos Global Consulting	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “We are a specialist mechanical engineering consultancy, providing expert level engineers and technical leaders to support high-impact projects.” Source: RevenueBase Database · checked Sep 28, 2026
20	Brickhouse Automation	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Indirect evidence “We are engineers with years of manufacturing experience in a variety of industries ranging from automotive, logistics, electronics, and construction.” Source: RevenueBase Database · checked Sep 28, 2026
21	Iqsystem INC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	11-50	2 contacts →
	Indirect evidence “IQSystem is a fast growing technology consulting company headquartered in the heart of San Francisco.” Source: RevenueBase Database · checked Sep 28, 2026
22	Fourtwoone	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	2 contacts →
	Partial evidence “421 is a design & engineering firm with one goal - building experiences that people love.” Source: RevenueBase Database · checked Sep 28, 2026
23	Bright Star Controls, LLC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	1 contacts →
	Partial evidence “Welcome to Bright Star Controls, where innovation meets expertise in engineering services!” Source: RevenueBase Database · checked Sep 28, 2026
24	Gross Design Studio	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “GROSS Design LLC is a full-service Industrial Design firm specializing in end-to-end product development and environment design.” Source: RevenueBase Database · checked Sep 28, 2026
25	Think2build LLC	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “From innovative thinking about new product concepts to building production tooling, Think2Build delivers solutions in research, design, and manufacturing by combining the best…” Source: RevenueBase Database · checked Sep 28, 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: engineering outsourcing 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 engineering outsourcing firms.
Partial evidence: Its own public description names part of engineering outsourcing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name engineering outsourcing 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 72 engineering outsourcing firms based in San Francisco, United States

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Engineering outsourcing firms based in San Francisco, United States at a glance

As of Sep 28, 2026

31.2%Verified-email coverage

7.9Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United States list rather than for San Francisco, so it is reported there. Company counts and contact totals on this page are exact for San Francisco, over 72 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 engineering outsourcing 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 San Francisco, United States whose own description of what they do matches “engineering outsourcing 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 engineering outsourcing 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 engineering outsourcing firms, and records with no verified work email. Companies headquartered outside San Francisco 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, 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 28, 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.

Engineering outsourcing firms by metro in the United States

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 engineering outsourcing 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 engineering outsourcing firms are there based in San Francisco, United States?

RevenueBase identified 72 engineering outsourcing firms headquartered in San Francisco, 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?

Synapse Product Development, headquartered in San Francisco, tops this list with the largest team on record.

Which city in the United States has the most engineering outsourcing firms?

Houston leads the United States with 123 headquartered companies, followed by New York (85) and Austin (82). San Francisco has 72.

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 72 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 28, 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.