Company lists · Data refreshed November 2026

Top 22 Custom web development agencies based in San Francisco, United States

Name: Custom web development agencies based in San Francisco, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Nov 6, 2026 311 companies tracked

RevenueBase identified 311 company matches for custom web development agencies associated with San Francisco, United States as of November 2026 and tracks 2,460 professional contacts across them, including 604 with verified work emails. Across the United States, New York is the largest hub for this category (1,113 companies); San Francisco has 311.

This list covers company matches for custom web development agencies associated with San Francisco, United States, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed November 6, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 RevenueBase SmartSearch · Exact Recorded Nov 6, 2026 How this list was built

311Companies

2,460Contacts tracked

604Verified emails

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The 22 largest custom web development agencies based in San Francisco, United States

Ranked by team size

Top 22 of 311 company matches for custom web development agencies based in San Francisco, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Fluxon	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	201-500	255 contacts →
	Exact match “Fluxon is a San Francisco-based software development team trusted by Google, Anthropic, Stripe, and top startups with the technology work that matters most.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2	Smart IT	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	51-200	73 contacts →
	Exact match “Smart IT is a custom software development and web development company headquartered in San Francisco.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3	Interactive Labs, INC	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	51-200	59 contacts →
	Exact match “Interactive Labs provides quality iOS, Android and Services design and development services.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
4	Gbsfo Custom Software Solutions Provider	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	51-200	43 contacts →
	Exact match “GBSFO is a creative software development solutions company with a strong attitude.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5	Tecaudex	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	41 contacts →
	Exact match “Idea to launch in 100 days.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6	Goteso	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	33 contacts →
	Exact match “Goteso is a product and service based software development firm.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7	Mayven Studios	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	51-200	27 contacts →
	Exact match “Mayven Studios is a software design and engineering partner that helps you build and scale successful digital products and experiences.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8	Roundtechsquare	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	27 contacts →
	Exact match “At RoundTechSquare, we believe that every business deserves digital solutions that inspire growth and innovation.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9	Quimbik, INC	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	25 contacts →
	Exact match “Quimbik is a software engineering company focused on web applications (solutions).” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10	Dayspring Partners	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	24 contacts →
	Exact match “Founded in 1997, Dayspring Partners is a digital consultancy that helps clients meet the challenges of the digital age.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11	Proleadsoft	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	23 contacts →
	Exact match “At Proleadsoft we specialize in the design, development and implementation of apps, software and digital marketing solutions.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12	Creativehub	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	51-200	23 contacts →
	Exact match “CreativeHub is a pioneering software development company focused on driving growth and innovation across industries.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13	ELVA	Exact match	San Francisco, United StatesHQ recorded Nov 6, 2026	11-50	21 contacts →
	Exact match “Our tailored design and development processes, coupled with our alignment to business strategy and technology, results in truly collaborative, intimate partnerships.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14	Appstem	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	51-200	20 contacts →
	Exact match “Appstem designs and develops custom software to help our clients solve complex business problems.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15	Blinkk	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	19 contacts →
	Exact match “Blinkk is an applied AI engineering development studio based in San Francisco with a worldwide team.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16	Ascalex	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	51-200	18 contacts →
	Exact match “AScaleX is a human-first digital marketing and creative agency focused on go-to-market strategy, built to help modern brands scale with clarity and momentum.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17	LAB Zero Innovations INC	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	16 contacts →
	Exact match “Lab Zero designs and develops custom software and products that move your business forward.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18	Charly Agency	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	15 contacts →
	Exact match “Charly is a strategy-first web design, branding, and CRO agency built for brands selling in the USA.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19	High Seas	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	15 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20	Tacpoint, INC	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	14 contacts →
	Exact match “We help brands shape their future.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21	729 Solutions	Exact match	San Francisco, CA, United StatesHQ recorded Nov 6, 2026	11-50	13 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22	Wlcm Welcome APP Studio	Exact match	San Francisco, United StatesHQ recorded Nov 6, 2026	11-50	13 contacts →
	Exact match “Top US-based App Design and Development Agency.” Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “custom web development agencies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 22 of 311 custom web development agencies based in San Francisco, United States

See the full list, filter by size, metro and specialty, and access 604 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Custom web development agencies based in San Francisco, United States at a glance

As of Nov 6, 2026

24.6%Verified-email coverage

7.9Average contacts per company

1-10Median size (employees)

Nov 6, 2026Page data refreshed

Companies by employee count

1-10

169

11-50

112

51-200

201-500

501-1,000

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 311 companies.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Company records associated with San Francisco, United States whose business descriptions match “custom web development agencies” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Where headquarters information is recorded, preview rows are also filtered to this page’s location. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 604 professional contacts with verified work emails across the full matched dataset. 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 November 6, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Custom web development agencies by metro in the United States

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “custom web development agencies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many custom web development agencies are there based in San Francisco, United States?

RevenueBase identified 311 company matches for custom web development agencies associated with San Francisco, United States as of November 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Fluxon tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city in the United States has the most custom web development agencies?

New York leads the United States with 1,113 company records, followed by Los Angeles (541) and Austin (455). San Francisco has 311.

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 604 professional contacts with verified work emails tracked across these 311 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 6, 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 SmartSearch, 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.