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Top IT Service Providers in California

15 of 47 IT service providers ranked on evidence in the Q4 2026 edition.

Between them, the 47 IT service providers on this page cover web development (37), mobile app development (27), android (25) and iOS app (24). 47 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

15 of 47 IT service providers ranked on evidence held on 6 October 2026: client reviews, vetting, awards and facts each business states on its own website, which we read and date. Nobody pays to be placed.

Positions are fixed for the quarter; the next edition is due in January 2027.

How this is ranked About this edition

All IT service providers 15 ranked SMEs 13 ranked

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AgreeYa Solutions
Mobile App Development · Web Development · iOS App · Also in India
AgreeYa Solutions is a technology company founded in 1999 and headquartered in Folsom, California. Its website says it has since become part of Computacenter.
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Why #1: Based in Folsom, California, with staff in the US, India and Mexico · Founded 1999 · ISO 9001, Microsoft partner, professional accreditation, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Tavant
Software Development · IT Services · IT Outsourcing · Also in United States of America
Tavant is a digital products and services company founded in 2000 and headquartered in Santa Clara. It builds AI and machine-learning solutions for several industries.
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Why #2: Based in Santa Clara, California · Founded 2000 · ISO 27001, professional accreditation · Team of 2,500+, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
General Networks
Social Media Marketing · IT Services · SEO · Also in United States of America
General Networks is a systems integrator that supplies technology consulting and managed services to organisations handling business-critical information.
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Why #3: Based in California · Founded 1984, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
WebSight Design
Social Media Marketing · Search Engine Optimization · Web Development · Also in United States of America
WebSight Design is a web development company serving the San Francisco Bay Area.
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Why #4: Based in San Francisco Bay Area, California · Founded 1995, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Ninthlink
Search Engine Optimization · Web Development · Web Design · Also in Caledonia
Ninthlink is an interactive agency in San Diego, California, started in 1999 by two brothers, Jeromy and Matt Stallings.
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Why #5 (shared): Based in San Diego, California · Founded 1999, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Santex
Social Media Marketing · Web Development · iOS App · Also in United States of America
Santex is a software engineering company that supplies development teams on demand to people and businesses around the world.
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Why #5 (shared): Office in California · Founded 1999, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Aximsoft
Mobile App Development · iOS App · Software Development · Also in United States of America
California-headquartered engineering firm providing data, AI, cloud and software development for enterprises and startups
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Why #7: Based in San Ramon, California, USA · Founded 2005, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Skipfour LLC
Mobile App Development · Web Development · iOS App · Also in United States of America
Skipfour LLC is a software development company that began in 2006 building accounting and CRM software for businesses in the United States.
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Why #8 (shared): Based in San Francisco, California, USA · Founded 2006, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
S
SURFnet
Web Development · Web Design · Software Development · Also in United States of America
SURFnet, trading as Surfnet Communications, is an internet service provider on California's Central Coast.
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Why #8 (shared): Based in California, USA · In business 20+ years, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Intellectsoft
Mobile App Development · Web Development · iOS App · Also in United States of America
Intellectsoft is a digital transformation consultancy headquartered in Palo Alto, California.
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Why #10: Based in Palo Alto, California · Founded 2007, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Forsys Inc.
Custom Software Development · ERP Software Development · Web Development · Also in United States of America
Forsys Inc. is a consulting firm specialising in the lead-to-revenue process, from customer records and quoting through to billing and renewals.
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Why #11: Based in Milpitas, California · Founded 2010 · Team of 300+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Rahi Systems
Mobile App Development · Web Development · iOS App · Also in United States of America
Rahi Systems supplies and supports technology infrastructure for large organisations.
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Why #12: Based in Fremont, California · Founded 2012, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Zbra Studios
Web Development · Web Design · UI/UX Design · Also in United States of America
Zbra Studios is a web development, design and marketing firm in the Atwater Village area of Los Angeles.
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Why #13: Based in Los Angeles, California · In business 10+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
LexStyle
Custom Software Development · Social Media Marketing · Web Development · Also in United States of America
LexStyle is a boutique web design and internet marketing agency for small businesses. It has offices in Redlands, California and Elko, Nevada, and is run as a family-owned team.
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Why #14: Based in Redlands, California, and Elko, Nevada · Founded 2018 · Boutique, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
SA Technologies Inc.
Custom Software Development · iOS App · Software Development · Also in United States of America
SA Technologies Inc. is an IT consulting and development company in Santa Clara, California. It is a Microsoft Gold Partner and has a presence in several countries.
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Why #15: Based in Santa Clara, California · Microsoft partner, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Also listed, not yet ranked. We hold nothing checkable on these yet that ranks them here: no client review, vetting, award, expert review, or fact stated on their own website (and on a place ranking, where they are based). They follow in order of their TrustList Score. How TrustList ranks · Get vetted, free
Achieve Internet
Custom Software Development · Web Development · PHP · Also in United States of America
Achieve Internet builds enterprise software for organisations that want smoother internal operations and better experiences for their users.
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On record: Founded 1998, as stated on its own website, read 5 Oct 2026
Bayinteractive, Inc
Mobile App Development · Custom Software Development · iOS App · Also in United States of America
Bayinteractive, Inc has offered design, development and software consulting since it was founded in 2002.
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On record: Founded 2002, as stated on its own website, read 5 Oct 2026
Zeus Group
Mobile App Development · Web Development · UI/UX Design
Zeus Group is a global IT company that combines Ukrainian roots with a Californian outlook.
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On record: Founded 2008, as stated on its own website, read 5 Oct 2026
Brush Your Ideas - - Web to Print Solutions
Software Development · PHP · Magento
Your printing businesses need a reliable tech partner who can do all the heavy lifting while you, without worries, focus on what really matters.
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On record: Address in California
Codezeros
Mobile App Development · Mobile Platforms · Staff Augmentation · Also in Washington and New York
Codezeros is a top Blockchain solution and service provider company that reinvents business with Blockchain solutions.
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AdliveTech
Mobile App Development · Search Engine Optimization · Web Development · Also in Delhi NCR
AdliveTech is an IT and digital marketing firm that describes itself as based in California, with its team working from India.
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On record: Based in California, USA, with a team in India
Agency73
Mobile App Development · Web Development · iOS App · Also in United States of America
Agency73 is a Salesforce consulting partner based in San Diego, California.
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On record: Based in San Diego, California
Algoworks
Mobile App Development · Web Development · iOS App · Also in United States of America
Algoworks is an IT services provider with offices in Sunnyvale, California and Noida, India.
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On record: Office in California
Creative27 LLC
Mobile App Development · Web Development · iOS App · Also in United States of America
Creative27 LLC is an app design and development agency in Los Angeles.
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On record: Based in Los Angeles, California

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Top IT Service Providers in California

AgreeYa Solutions

Tavant

General Networks

WebSight Design

Ninthlink

Santex

Aximsoft

Skipfour LLC

SURFnet

Intellectsoft

Forsys Inc.

Rahi Systems

Zbra Studios

LexStyle

SA Technologies Inc.

Achieve Internet

Bayinteractive, Inc

Zeus Group

Brush Your Ideas - - Web to Print Solutions

Codezeros

AdliveTech

Agency73

Algoworks

Creative27 LLC

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