Company lists · Data refreshed September 2026

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

Name: Custom software development companies 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 219 companies tracked

RevenueBase identified 219 custom software development companies headquartered in San Francisco, United States as of September 2026 and tracks 3,736 professional contacts across them, including 809 with verified work emails and 253 with mobile numbers. New York is the largest hub.

This list covers custom software development 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 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

219Companies

3,736Contacts tracked

809Verified emails

253Mobile numbers

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

Ranked by team size

Top 25 of 219 custom software development companies 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 development 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Fluxon	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	201-500	200 contacts →
	Strong 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	Cheesecake Labs	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	131 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 9, 2026
4	Inverita	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	125 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 9, 2026
5	MINDK	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	124 contacts →
	Strong 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
6	Ensolvers	Strong evidence	San Francisco, United StatesHQ checked Sep 9, 2026	51-200	121 contacts →
	Strong 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
7	Coditude	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	108 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 9, 2026
8	Mechlin Technologies	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	103 contacts →
	Strong 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 9, 2026
9	RAW Engineering	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	97 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 9, 2026
10	Solveit	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	95 contacts →
	Indirect evidence “Building more than just apps.” Source: RevenueBase Database · checked Sep 9, 2026
11	Jetruby Agency	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	201-500	82 contacts →
	Strong evidence “JetRuby is an AI-native, ISO-certified software development agency.” Source: RevenueBase Database · checked Sep 9, 2026
12	Orangesoft	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	75 contacts →
	Strong 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
13	Yellow Systems	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	73 contacts →
	Strong evidence “Yellow Systems is a technology-first company creating AI/ML-powered and custom software solutions for diverse business needs.” Source: RevenueBase Database · checked Sep 9, 2026
14	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
15	Willware Technologies	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	66 contacts →
	Strong 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 9, 2026
16	Somnio Software	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	65 contacts →
	Partial evidence “We’re a Digital Product Agency you can grow with, globally recognized as a Top Flutter development company.” Source: RevenueBase Database · checked Sep 9, 2026
17	Interactive Labs, INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	58 contacts →
	Partial evidence “Interactive Labs provides quality iOS, Android and Services design and development services.” Source: RevenueBase Database · checked Sep 9, 2026
18	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
19	Appeon	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	54 contacts →
	Partial 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
20	Gbsfo Custom Software Solutions Provider	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	50 contacts →
	Strong evidence “GBSFO is a creative software development solutions company with a strong attitude.” Source: RevenueBase Database · checked Sep 9, 2026
21	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
22	Syndicode	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	40 contacts →
	Strong 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
23	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
24	Goteso	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	11-50	33 contacts →
	Strong evidence “Goteso is a product and service based software development firm.” Source: RevenueBase Database · checked Sep 9, 2026
25	Mayven Studios	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 9, 2026	51-200	30 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 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 development companies. 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 development companies.
Partial evidence: Its own public description names part of custom software development companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name custom software development companies. 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 219 custom software development companies based in San Francisco, United States

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

As of Sep 9, 2026

21.7%Verified-email coverage

6.8%Mobile-number coverage

17.1Average contacts per company

11-50Median size (employees)

175.3%Largest-city concentration · New York

Sep 9, 2026Page data refreshed

Companies by employee count

1-10

101

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

7290–30

6131–60

061–90

390–180

16180+

Company record updated

Median 72.0d

00–30

1,67031–60

1,54061–90

32590–180

201180+

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 development 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 development 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 development 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 development 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, 809 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 development companies by metro in the United States

Custom software development companies in New York384
Custom software development companies in Austin232
Custom software development companies in Houston168
Custom software development companies in Miami162
Custom software development companies in Los Angeles154
Custom software development companies in Chicago143
Custom software development companies in San Francisco137

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 development 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 development companies are there based in San Francisco, United States?

RevenueBase identified 219 custom software development 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?

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

Which city has the most custom software development companies?

New York leads with 384 headquartered companies, followed by Austin (232) and Houston (168).

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 809 verified decision-maker contacts tracked across these 219 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.