Company lists · Data refreshed September 2026

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

Name: Outsource 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 21, 2026 86 companies tracked

RevenueBase identified 86 outsource software development companies headquartered in San Francisco, United States as of September 2026 and tracks 5,081 professional contacts across them, including 1,440 with verified work emails. New York is the largest hub.

This list covers outsource 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 21, 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 21, 2026 86% judged on-target in blind review

86Companies

5,081Contacts tracked

1,440Verified emails

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

Ranked by team size

Top 25 of 86 outsource software development companies based in San Francisco, United States, ranked by team size, largest first. Data refreshed Sep 21, 2026. RevenueBase Smart Search rates how each company's information relates to outsource 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	Bairesdev	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	1,001-5,000	3,186 contacts →
	Partial evidence “BairesDev is your expert partner that works alongside clients to build high-quality software solutions with speed and precision.” Source: RevenueBase Database · checked Sep 21, 2026
2	Fluxon	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 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 21, 2026
3	MINDK	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 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 21, 2026
4	Ensolvers	Strong evidence	San Francisco, United StatesHQ checked Sep 21, 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 21, 2026
5	Mechlin Technologies	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 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 21, 2026
6	Treinetic	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	79 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 21, 2026
7	Smart IT	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 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 21, 2026
8	Willware Technologies	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 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 21, 2026
9	Gbsfo Custom Software Solutions Provider	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	50 contacts →
	Strong evidence “GBSFO is a creative software development solutions company with a strong attitude.” Source: RevenueBase Database · checked Sep 21, 2026
10	Scalac	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 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 21, 2026
11	Syndicode	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 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 21, 2026
12	Alto Acq. By Revelo	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	39 contacts →
	Partial evidence “Alto is a San Francisco-based technology company specializing in assembling and managing global software engineering teams across 30+ countries.” Source: RevenueBase Database · checked Sep 21, 2026
13	Goteso	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	33 contacts →
	Strong evidence “Goteso is a product and service based software development firm.” Source: RevenueBase Database · checked Sep 21, 2026
14	Quimbik, INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	23 contacts →
	Partial evidence “Quimbik is a software engineering company focused on web applications (solutions).” Source: RevenueBase Database · checked Sep 21, 2026
15	Code Power	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	201-500	22 contacts →
	Strong evidence “We are the fastest-growing Nearshore Software Outsourcing company in the Americas.” Source: RevenueBase Database · checked Sep 21, 2026
16	Appstem	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	20 contacts →
	Partial evidence “Appstem designs and develops custom software to help our clients solve complex business problems.” Source: RevenueBase Database · checked Sep 21, 2026
17	Cidersoft	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	16 contacts →
	Strong evidence “Cidersoft is a San Francisco based software development company that offers full-service software design and development.” Source: RevenueBase Database · checked Sep 21, 2026
18	LAB Zero Innovations INC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	15 contacts →
	Partial evidence “Lab Zero designs and develops custom software and products that move your business forward.” Source: RevenueBase Database · checked Sep 21, 2026
19	Allstarsit	Indirect evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	501-1,000	14 contacts →
	Indirect evidence “ALLSTARSIT is an international outstaffing service provider that helps businesses recruit, pay, insure, and support top global talent with payroll, benefits, and more.” Source: RevenueBase Database · checked Sep 21, 2026
20	Novalab Tech	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	12 contacts →
	Strong evidence “NovaLab Tech is a software development company with over 10 years of proven industry experience.” Source: RevenueBase Database · checked Sep 21, 2026
21	Protonomics, LLC	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	3 contacts →
	Partial evidence “Protonomics has a worldwide network of software architects, developers and analysts offering on demand services for IT and Business Strategy.” Source: RevenueBase Database · checked Sep 21, 2026
22	Prolev Technologies, LLC	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	2 contacts →
	Strong evidence “Prolev Technologies LLC is a Bay Area-based software development outsourcing company with a focus on building and maintaining strong software engineering teams for unique needs of…” Source: RevenueBase Database · checked Sep 21, 2026
23	Glatco INC	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	1 contacts →
	Strong evidence “We are a leading provider of offshore software development solutions with US-based technical and program management.” Source: RevenueBase Database · checked Sep 21, 2026
24	Form Soft INC	Strong evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	51-200	1 contacts →
	Strong evidence “FormSoft provides software development services for high growth companies.” Source: RevenueBase Database · checked Sep 21, 2026
25	Conexa	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 21, 2026	11-50	1 contacts →
	Partial evidence “Somos un Software Factory fundado en Octubre de 2016 que cree en brindar un servicio por encima de las expectativas.” Source: RevenueBase Database · checked Sep 21, 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: outsource 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 outsource software development companies.
Partial evidence: Its own public description names part of outsource 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 outsource 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 86 outsource software development companies based in San Francisco, United States

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

As of Sep 21, 2026

28.3%Verified-email coverage

59.1Average contacts per company

11-50Median size (employees)

281.4%Largest-city concentration · New York

Sep 21, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

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 86 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 outsource 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 “outsource 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 outsource 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 outsource 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, 1,440 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 21, 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.

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

RevenueBase identified 86 outsource 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?

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

Which city has the most outsource software development companies?

New York leads with 242 headquartered companies, followed by Austin (149) and Houston (100).

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 1,440 verified decision-maker contacts tracked across these 86 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 21, 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.