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Company lists · Data refreshed September 2026

Top 25 Custom software engineering companies based in San Francisco, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 139 companies tracked

RevenueBase identified 139 custom software engineering companies headquartered in San Francisco, United States as of September 2026 and tracks 1,850 professional contacts across them, including 345 with verified work emails. New York is the largest hub.

This list covers custom software engineering companies 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 24, 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 24, 2026 86% judged on-target in blind review
139Companies
1,850Contacts tracked
345Verified emails
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The 25 largest custom software engineering companies based in San Francisco, United States

Ranked by team size
Top 25 of 139 custom software engineering companies based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 24, 2026. RevenueBase Smart Search rates how each company's information relates to custom software engineering companies: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1
Siliconmint
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-200179 contacts →

Partial evidence

“SiliconMint provides dedicated software teams that architect, build and support mission-critical systems.”

Source: RevenueBase Database · checked Sep 24, 2026
2
MINDK
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-200124 contacts →

Partial evidence

“MindK is a software development and IT consulting company that helps businesses build software products, automate business processes, modernize technology and infrastructure.”

Source: RevenueBase Database · checked Sep 24, 2026
3
Ensolvers
Partial evidenceSan Francisco, United StatesHQ checked Sep 24, 202651-200121 contacts →

Partial evidence

“Ensolvers specializes in software development, architecture, product development, outsourcing, testing, and building dedicated teams for end-to-end software solutions.”

Source: RevenueBase Database · checked Sep 24, 2026
4
Smart IT
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20068 contacts →

Strong evidence

“Smart IT is a custom software development and web development company headquartered in San Francisco.”

Source: RevenueBase Database · checked Sep 24, 2026
5
Cmolds
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 2026501-1,00055 contacts →

Strong evidence

“CMOLDS is a tech development company founded in 2016, focused on building mobile and web applications, UX/UI design systems, and custom software solutions.”

Source: RevenueBase Database · checked Sep 24, 2026
6
Appeon
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20054 contacts →

Indirect evidence

“Appeon was founded in by a group of innovative Silicon Valley professionals with the mission to simplify and speed up enterprise application development.”

Source: RevenueBase Database · checked Sep 24, 2026
7
Coding Crafts
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5051 contacts →

Strong evidence

“CodingCrafts is a founder led software engineering company helping agencies, startups, and SaaS businesses scale their product development with reliable, high quality engineering…”

Source: RevenueBase Database · checked Sep 24, 2026
8
Scalac
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20049 contacts →

Partial evidence

“For over 10 years, Scalac has been delivering high-quality software, successfully aiding FinTechs, HealthTechs, EdTechs, AdTechs and startups in their efforts to scale.”

Source: RevenueBase Database · checked Sep 24, 2026
9
Iyrix Technologies
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5039 contacts →

Strong evidence

“Iyrix Tech is a custom software development company having 10+ years of experience with a team of high quality engineers and well-versed specialists providing innovative solutions…”

Source: RevenueBase Database · checked Sep 24, 2026
10
Goteso
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5033 contacts →

Partial evidence

“Goteso is a product and service based software development firm.”

Source: RevenueBase Database · checked Sep 24, 2026
11
Roundtechsquare
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5029 contacts →

Indirect evidence

“At RoundTechSquare, we believe that every business deserves digital solutions that inspire growth and innovation.”

Source: RevenueBase Database · checked Sep 24, 2026
12
Quimbik, INC
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5023 contacts →

Strong evidence

“Quimbik is a software engineering company focused on web applications (solutions).”

Source: RevenueBase Database · checked Sep 24, 2026
13
Proleadsoft
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5023 contacts →

Partial evidence

“At Proleadsoft we specialize in the design, development and implementation of apps, software and digital marketing solutions.”

Source: RevenueBase Database · checked Sep 24, 2026
14
Creativehub
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20023 contacts →

Partial evidence

“CreativeHub is a pioneering software development company focused on driving growth and innovation across industries.”

Source: RevenueBase Database · checked Sep 24, 2026
15
Appstem
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20020 contacts →

Strong evidence

“Appstem designs and develops custom software to help our clients solve complex business problems.”

Source: RevenueBase Database · checked Sep 24, 2026
16
Cidersoft
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20016 contacts →

Partial evidence

“Cidersoft is a San Francisco based software development company that offers full-service software design and development.”

Source: RevenueBase Database · checked Sep 24, 2026
17
LAB Zero Innovations INC
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5015 contacts →

Strong evidence

“Lab Zero designs and develops custom software and products that move your business forward.”

Source: RevenueBase Database · checked Sep 24, 2026
18
Iage - DEV AI On I
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5015 contacts →

Indirect evidence

“WE DEVELOP APPLICATIONS THAT USERS LOVE, ON TIME & WITHIN BUDGET.”

Source: RevenueBase Database · checked Sep 24, 2026
19
High Seas
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5014 contacts →

Partial evidence

“High Seas is a technology-focused digital agency that specializes in custom Mobile App and Website solutions that improve performance and productivity for small, medium, and…”

Source: RevenueBase Database · checked Sep 24, 2026
20
Galliot
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5013 contacts →

Strong evidence

“At our core, we provide exceptional software engineering and design services, offering an array of solutions designed to foster growth, cut costs, and expedite timelines.”

Source: RevenueBase Database · checked Sep 24, 2026
21
Novalab Tech
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20012 contacts →

Partial evidence

“NovaLab Tech is a software development company with over 10 years of proven industry experience.”

Source: RevenueBase Database · checked Sep 24, 2026
22
729 Solutions
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5011 contacts →

Indirect evidence

“Selecting the right systems to run your business and connecting all of them together is complicated enough, you don’t need a digital agency that makes it even more complicated.”

Source: RevenueBase Database · checked Sep 24, 2026
23
Apps-O-Rama
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5011 contacts →

Indirect evidence

“Apps-O-Rama is a development consulting company that specializes in providing development solutions for brands, tech companies and startups.”

Source: RevenueBase Database · checked Sep 24, 2026
24
Baruni Solutions
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 2026201-50010 contacts →

Strong evidence

“Baruni Solutions is a custom software development company based in Jabalpur, MP, India with proven expertise in Microsoft technologies, Web application development, Mobile…”

Source: RevenueBase Database · checked Sep 24, 2026
25
Robot SEA Monster
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202611-5010 contacts →

Strong evidence

“Robot Sea Monster is custom software development studio that leverages bespoke solutions to deliver on digital ambitions.”

Source: RevenueBase Database · checked Sep 24, 2026

Showing 25 of 139 custom software engineering companies based in San Francisco, United States

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 345 reachable decision-makers.

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Custom software engineering companies based in San Francisco, United States at a glance

As of Sep 24, 2026
18.6%Verified-email coverage
13.3Average contacts per company
11-50Median size (employees)
290.6%Largest-city concentration · New York
Sep 24, 2026Page data refreshed

Companies by employee count

1-10
66
11-50
48
51-200
20
201-500
3
501-1,000
2

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 139 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 custom software engineering companies, 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 “custom software engineering companies”. 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 custom software engineering companies), 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 custom software engineering companies, 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, 345 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 24, 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.

Custom software engineering companies 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 custom software engineering companies, 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 custom software engineering companies are there based in San Francisco, United States?

RevenueBase identified 139 custom software engineering companies 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?

Siliconmint, headquartered in San Francisco, tops this list with the largest team on record.

Which city has the most custom software engineering companies?

New York leads with 404 headquartered companies, followed by Austin (268) and Houston (188).

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 345 verified decision-maker contacts tracked across these 139 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 24, 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.

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