Company lists · Data refreshed September 2026

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

Name: Custom software developers 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 9, 2026 136 companies tracked

RevenueBase identified 136 custom software developers headquartered in San Francisco, United States as of September 2026 and tracks 2,110 professional contacts across them, including 459 with verified work emails and 148 with mobile numbers. New York is the largest hub.

This list covers custom software developers 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 9, 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 9, 2026 86% judged on-target in blind review

136Companies

2,110Contacts tracked

459Verified emails

148Mobile numbers

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The 25 largest custom software developers based in San Francisco, United States

Ranked by team size

Top 25 of 136 custom software developers based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 9, 2026. RevenueBase Smart Search rates how each company's information relates to custom software developers: 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	Fluxon	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	201-500	200 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 9, 2026
2	Siliconmint	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	179 contacts →
	Partial evidence “SiliconMint provides dedicated software teams that architect, build and support mission-critical systems.” Source: RevenueBase Database · checked Sep 9, 2026
3	MINDK	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	124 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 9, 2026
4	Ensolvers	Partial evidence	San Francisco, United StatesHQ checked Sep 9, 2026	51-200	121 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 9, 2026
5	Orangesoft	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	75 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 9, 2026
6	Smart IT	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	68 contacts →
	Strong evidence “Smart IT is a custom software development and web development company headquartered in San Francisco.” Source: RevenueBase Database · checked Sep 9, 2026
7	Cmolds	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	501-1,000	55 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 9, 2026
8	Appeon	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	54 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 9, 2026
9	Gbsfo Custom Software Solutions Provider	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	50 contacts →
	Partial evidence “GBSFO is a creative software development solutions company with a strong attitude.” Source: RevenueBase Database · checked Sep 9, 2026
10	Scalac	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	49 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 9, 2026
11	Syndicode	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	40 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 9, 2026
12	Iyrix Technologies	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	11-50	39 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 9, 2026
13	Goteso	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	11-50	33 contacts →
	Partial evidence “Goteso is a product and service based software development firm.” Source: RevenueBase Database · checked Sep 9, 2026
14	Roundtechsquare	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	11-50	29 contacts →
	Indirect evidence “At RoundTechSquare, we believe that every business deserves digital solutions that inspire growth and innovation.” Source: RevenueBase Database · checked Sep 9, 2026
15	Quimbik, INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	11-50	23 contacts →
	Partial evidence “Quimbik is a software engineering company focused on web applications (solutions).” Source: RevenueBase Database · checked Sep 9, 2026
16	Creativehub	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	23 contacts →
	Partial evidence “CreativeHub is a pioneering software development company focused on driving growth and innovation across industries.” Source: RevenueBase Database · checked Sep 9, 2026
17	Appstem	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	20 contacts →
	Strong evidence “Appstem designs and develops custom software to help our clients solve complex business problems.” Source: RevenueBase Database · checked Sep 9, 2026
18	Cidersoft	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	16 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 9, 2026
19	LAB Zero Innovations INC	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	11-50	15 contacts →
	Strong evidence “Lab Zero designs and develops custom software and products that move your business forward.” Source: RevenueBase Database · checked Sep 9, 2026
20	Iage - DEV AI On I	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	11-50	15 contacts →
	Indirect evidence “WE DEVELOP APPLICATIONS THAT USERS LOVE, ON TIME & WITHIN BUDGET.” Source: RevenueBase Database · checked Sep 9, 2026
21	High Seas	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	11-50	14 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 9, 2026
22	Novalab Tech	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	12 contacts →
	Partial evidence “NovaLab Tech is a software development company with over 10 years of proven industry experience.” Source: RevenueBase Database · checked Sep 9, 2026
23	Apps-O-Rama	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	11-50	11 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 9, 2026
24	Baruni Solutions	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	201-500	10 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 9, 2026
25	Robot SEA Monster	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	11-50	10 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 9, 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: custom software developers. 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 custom software developers.
Partial evidence: Its own public description names part of custom software developers, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom software developers. 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 136 custom software developers based in San Francisco, United States

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

As of Sep 9, 2026

21.8%Verified-email coverage

7.0%Mobile-number coverage

15.5Average contacts per company

11-50Median size (employees)

283.8%Largest-city concentration · New York

Sep 9, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 12.0d

4090–30

3531–60

061–90

290–180

13180+

Company record updated

Median 72.0d

00–30

95831–60

86561–90

18290–180

105180+

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 developers, 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 developers”. 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 developers), 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 developers, 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, 459 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 9, 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 developers by metro in the United States

Custom software developers in New York386
Custom software developers in Austin239
Custom software developers in Houston172
Custom software developers in Miami166
Custom software developers in Chicago158
Custom software developers in Los Angeles155
Custom software developers in San Francisco135

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 developers, 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 developers are there based in San Francisco, United States?

RevenueBase identified 136 custom software developers 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?

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

Which city has the most custom software developers?

New York leads with 386 headquartered companies, followed by Austin (239) and Houston (172).

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 459 verified decision-maker contacts tracked across these 136 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 9, 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.