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Company lists · Data refreshed September 2026

Top 25 Platform building firms based in San Diego, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 143 companies tracked

RevenueBase identified 143 platform building firms headquartered in San Diego, United States as of September 2026 and tracks 1,429 professional contacts across them, including 230 with verified work emails. New York is the largest hub.

This list covers platform building firms headquartered in San Diego, 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
143Companies
1,429Contacts tracked
230Verified emails
Unlock all 143 companies Free signup · no credit card · 500 free credits

The 25 largest platform building firms based in San Diego, United States

Ranked by team size
Top 25 of 143 platform building firms based in San Diego, 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
Basic DeptIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202651-200215

“BASIC/DEPT® is a global branding and experience design company.”

Source: company website · checked Sep 5, 2026
2
Jeannypr Softech Pvt. LTDIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-5036

“Jeannypr Softech is an IT product and services company and offers a full range of web, mobile & software development solutions.”

Source: company website · checked Sep 5, 2026
3
Fuerza StudioIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-5035

“Fuerza Studio was founded in 2010.”

Source: company website · checked Sep 5, 2026
4
RoyanisIndirect evidence
San Diego, United StatesHQ checked Sep 5, 202611-5032

“Royanis is a company that specializes in solving software and data related challenges, turning ideas into web, cloud or mobile based digital software products that can scale to…”

Source: company website · checked Sep 5, 2026
5
I2a Solutions INCIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-5025

“At i2a Solutions, we transform our client’s ideas into innovative applications and solutions that deliver a high business impact.”

Source: company website · checked Sep 5, 2026
6
SeamgenIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-5023

“Design & Development Web & Mobile Applications // Company Overview \\ Together we can digitize.”

Source: company website · checked Sep 5, 2026
7
Border UXIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-5022

“Border UX: UX strategy, design systems, and research engines for enterprise software.”

Source: company website · checked Sep 5, 2026
8
LJG Digital, INCIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-5022

“LJG Digital is an interactive design agency located in San Diego, CA.”

Source: company website · checked Sep 5, 2026
9
WebcentriqIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202651-20021

“We specialize in digital innovation and transformation.”

Source: company website · checked Sep 5, 2026
10
SwazeiPartial evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-5020

“Software Design and Development Platform with a passion to create intuitive products.”

Source: company website · checked Sep 5, 2026
11
Storm BrainPartial evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-5016

“Smarter Digital Smarter Marketing | Smarter Web Assets & Digital Platforms | Smarter Branding Storm Brain is a leading full-service digital agency specializing in the development…”

Source: company website · checked Sep 5, 2026
12
Digital CraftersIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202651-20015

“Digital Crafters is a web design and development company and we believe in providing high-quality value-added IT solutions to our clients.”

Source: company website · checked Sep 5, 2026
13
Sunrise AppsIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202651-20015

“Sunrise Apps is a US-registered mobile & web development company.”

Source: company website · checked Sep 5, 2026
14
Barefoot SolutionsIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-5011

“Based in San Diego, Barefoot Solutions is an innovative custom web and mobile application development company.”

Source: company website · checked Sep 5, 2026
15
CodelinearIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-5011

“Codelinear is a systems and growth company helping businesses build, automate, and scale digital operations across product, commerce, and engineering.”

Source: company website · checked Sep 5, 2026
16
Bl3ndlabsIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-508

“BL3NDlabs is a strategy, design & technology firm.”

Source: company website · checked Sep 5, 2026
17
BridgerIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 20261-108

“Bridger is a trusted design agency that partners with Fortune 500 companies, innovative mid-market enterprises, and high-growth startups.”

Source: company website · checked Sep 5, 2026
18
dip.studioIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 20261-108

“Design in Progress (dip) represents the continuous cycle of design.”

Source: company website · checked Sep 5, 2026
19
InvoodooIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-508

“Make Things Work InVooDoo is a professional team with strong and proven leadership position in web development, interface and art design, consultancy, testing and optimisation.”

Source: company website · checked Sep 5, 2026
20
Opel Solutions INCIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-507

“Opel Solutions: Your Digital Partner Since 2020 Welcome to Opel Solutions, a dynamic digital agency based in the heart of San Diego, California, where innovation and creativity…”

Source: company website · checked Sep 5, 2026
21
Nonstop MarketingIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 20261-106

“An authority in website design and development, NonStop Marketing isn’t just a name but a philosophy.”

Source: company website · checked Sep 5, 2026
22
Vault R&dIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-505

“Our mission is to exploit technology to maximize your success.”

Source: company website · checked Sep 5, 2026
23
Nobis InteractiveIndirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-505

“Nobis Interactive is an industry-leading provider of services and solutions to enable and assist our clients with true and scalable Digital Transformation.”

Source: company website · checked Sep 5, 2026
24
Plum NetworksPartial evidence
San Diego, CA, United StatesHQ checked Sep 5, 202611-505

“Plum Networks is a mobile/web application & platform development, website design, and digital marketing firm based in San Diego, California.”

Source: company website · checked Sep 5, 2026
25
9d8Indirect evidence
San Diego, CA, United StatesHQ checked Sep 5, 20261-104

“Design and development.”

Source: company website · checked Sep 5, 2026

Showing 25 of 143 platform building firms based in San Diego, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 230 reachable decision-makers.

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Platform building firms based in San Diego, 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
97
11-50
38
51-200
7
201-500
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 San Diego, over 143 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 San Diego, 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 San Diego 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, 230 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 San Diego, United States?

RevenueBase identified 143 platform building firms headquartered in San Diego, 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?

Basic Dept, headquartered in San Diego, 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 230 verified decision-maker contacts tracked across these 143 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 143 platform building firms based in San Diego, 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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