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Company lists · Data refreshed September 2026

Top 25 Custom software firms based in San Francisco, United States

Compiled by the RevenueBase Data Team Data refreshed Sep 24, 2026 222 companies tracked

RevenueBase identified 222 custom software firms headquartered in San Francisco, United States as of September 2026 and tracks 5,065 professional contacts across them, including 1,280 with verified work emails. New York is the largest hub.

This list covers custom software 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 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
222Companies
5,065Contacts tracked
1,280Verified emails
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The 25 largest custom software firms based in San Francisco, United States

Ranked by team size
Top 25 of 222 custom software firms 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 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1
Robosoft Technologies
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 20261,001-5,0001,097 contacts →

Indirect evidence

“Engineering the Experience that matter.”

Source: RevenueBase Database · checked Sep 24, 2026
2
LOKA
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 2026201-500336 contacts →

Partial evidence

“Loka is a Silicon Valley software consultancy with global impact, bringing innovations to market faster since 2004.”

Source: RevenueBase Database · checked Sep 24, 2026
3
Fluxon
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 2026201-500200 contacts →

Partial evidence

“Fluxon is a San Francisco-based software development team trusted by Google, Anthropic, Stripe, and top startups with the technology work that matters most.”

Source: RevenueBase Database · checked Sep 24, 2026
4
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
5
Cheesecake Labs
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-200131 contacts →

Partial evidence

“Cheesecake Labs is an AI, Data, Blockchain, and Software Engineering company that partners with US companies to build and modernize digital products.”

Source: RevenueBase Database · checked Sep 24, 2026
6
Inverita
Strong evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-200125 contacts →

Strong evidence

“inVerita is a top-rated AI-enabled custom software and digital transformation partner specializing in healthcare, data engineering, cloud modernization, and regulated compliance…”

Source: RevenueBase Database · checked Sep 24, 2026
7
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
8
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
9
Coditude
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-200108 contacts →

Indirect evidence

“Coditude stands out as a rapidly growing force in the digital realm, offering straightforward, impactful tech capabilities.”

Source: RevenueBase Database · checked Sep 24, 2026
10
Mechlin Technologies
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-200103 contacts →

Partial evidence

“Mechlin Technologies is a San Francisco, California (USA) based software development and technology consulting company, powered by a trusted offshore engineering team, helping…”

Source: RevenueBase Database · checked Sep 24, 2026
11
RAW Engineering
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20097 contacts →

Indirect evidence

“Raw Engineering’s Innovative digital solutions and services are trusted by the world’s best Fortune 500 Enterprises, Sports & Entertainment companies and Startups to provide…”

Source: RevenueBase Database · checked Sep 24, 2026
12
Solveit
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20095 contacts →

Indirect evidence

“Building more than just apps.”

Source: RevenueBase Database · checked Sep 24, 2026
13
Treinetic
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20079 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 24, 2026
14
Orangesoft
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20075 contacts →

Partial evidence

“Orangesoft is a full-cycle software development company that helps healthcare and fintech companies turn bold ideas into secure, scalable digital products.”

Source: RevenueBase Database · checked Sep 24, 2026
15
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
16
Willware Technologies
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20066 contacts →

Partial evidence

“Willware Technologies, an ISO 9001 and ISO 27001 certified company headquartered in Koramangala, Bangalore, with a presence in California, USA, is a dynamic software development…”

Source: RevenueBase Database · checked Sep 24, 2026
17
Interactive Labs, INC
Indirect evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20058 contacts →

Indirect evidence

“Interactive Labs provides quality iOS, Android and Services design and development services.”

Source: RevenueBase Database · checked Sep 24, 2026
18
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
19
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
20
Gbsfo Custom Software Solutions Provider
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20050 contacts →

Partial evidence

“GBSFO is a creative software development solutions company with a strong attitude.”

Source: RevenueBase Database · checked Sep 24, 2026
21
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
22
Syndicode
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20040 contacts →

Partial evidence

“Syndicode is your value-driven software development partner with a globally distributed team of 70+ engineers, designers, architects and IT managers.”

Source: RevenueBase Database · checked Sep 24, 2026
23
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
24
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
25
Mayven Studios
Partial evidenceSan Francisco, CA, United StatesHQ checked Sep 24, 202651-20030 contacts →

Partial evidence

“Mayven Studios is a software design and engineering partner that helps you build and scale successful digital products and experiences.”

Source: RevenueBase Database · checked Sep 24, 2026

Showing 25 of 222 custom software firms 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 1,280 reachable decision-makers.

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

As of Sep 24, 2026
25.3%Verified-email coverage
22.8Average contacts per company
11-50Median size (employees)
262.2%Largest-city concentration · New York
Sep 24, 2026Page data refreshed

Companies by employee count

1-10
95
11-50
74
51-200
43
201-500
6
501-1,000
3
1,001-5,000
1

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 222 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 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 “custom software 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 custom software 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 custom software 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, 1,280 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 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 custom software 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 custom software firms are there based in San Francisco, United States?

RevenueBase identified 222 custom software 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?

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

Which city has the most custom software firms?

New York leads with 582 headquartered companies, followed by Austin (358) and Houston (268).

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 1,280 verified decision-maker contacts tracked across these 222 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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