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Top Software Development Companies in California

26 of 54 software development companies ranked on evidence in the Q4 2026 edition.

Between them, the 54 software development companies on this page cover web development (20), android (19), mobile app development (18) and web design (17). They also list work in Los Angeles and Southern California. 54 of them have written a profile you can read before you get in touch.

TrustList ranking

Q4 2026 edition

26 of 54 software development companies 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 software development companies 26 ranked SMEs 25 ranked

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JetRuby Agency 2010
Mobile App Development · Web Development · E-Commerce Development · Also in United States of America
JetRuby Agency 2010 is a software development agency that works mainly with Ruby on Rails.
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Why #1: Address in California · Founded 2010, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
Saritasa
Mobile App Development · Custom Software Development · Mobile Platforms · Also in United States of America
Saritasa is a custom software company headquartered in Newport Beach, California.
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Why #2: Based in Newport Beach, California · Founded 2005 · Team of 140+, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Art+Logic
Mobile App Development · Web Development · iOS App · Also in United States of America
Art+Logic is a custom software development company based in Pasadena, California. It has designed and built software since 1991 and says it has worked for more than 900 clients.
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Why #3: Based in Pasadena, California, USA · Founded 1991, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
JCCS Computer Consulting
JCCS Computer Consulting Services is a computer support firm in Simi Valley, California, serving Los Angeles and Ventura Counties.
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Why #4: Based in Simi Valley, California · Founded 1993, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
WeblineGlobal
Mobile App Development · Web Development · Web Design · Also in United States of America
WeblineGlobal is a software development company with a base in Irvine, California, active since 1999.
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Why #5 (shared): Based in Irvine, California, USA · Founded 1999, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Framework Solutions LLC
.NET · Cloud · SEO · Also in Fleet and Southern California
Southern California software firm specialising in bio-repository, insurance and e-commerce systems and Dynamics integration
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Why #5 (shared): Based in Los Angeles, California · Founded 1999, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
e4k Digital Agency
Web Design · Business Services · Digital Marketing · Also in Birmingham
e4k Digital Agency is a web and digital marketing agency based in Birmingham, UK, with an office in California.
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Why #7: Based in Birmingham, UK, and California, USA · Founded 2000, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Artisan Crew Engineering
Custom Software Development · Web Development · Web Design · Also in Japan
Artisan Crew Engineering, trading as Artisan Crew Inc., is a software and web firm in Torrance in the Los Angeles area.
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Why #8 (shared): Based in Torrance, Los Angeles, California, USA · Founded 2001, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
LDA Interactive, LLC.
Android · eCommerce · Retail · Also in Pasadena and Southern California
LDA Interactive, LLC. is a web design and development agency in Los Angeles, California.
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Why #8 (shared): Based in Los Angeles, California, USA · In business 25+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
ITegrity Web Technologies
Web Development · Web Design · Software Development
ITegrity Web Technologies is a web design and software development company in San Diego, California.
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Why #10: Based in San Diego, California · Founded 2002, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Svitla Systems
Mobile App Development · Custom Software Development · Software Development · Also in United States of America
Software engineering company offering custom development, data, cloud and AI services through managed and extended teams
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Why #11: Based in San Francisco, California · Founded 2003, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
SSD Software Solutions
Mobile App Development · Social Media Marketing · Search Engine Optimization · Also in United States of America
SSD Software Solutions, which describes itself as Relentless Software Solutions, is a development and design company in Pasadena, California.
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Why #12: Based in Pasadena, California, USA · Founded 2005, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Treeline
Mobile App Development · Custom Software Development · IoT · Also in United States of America
Treeline is a software and product development company with its office in San Diego, California.
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Why #13 (shared): Based in San Diego, California · In business 20+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Infoshare Systems, Inc
ERP
California software services firm covering IT administration, custom development, ERP and an AI virtual nurse for healthcare
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Why #13 (shared): Based in California, United States · Founded 2006, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Mev, LLC
Mobile App Development · Web Development · Web Design · Also in United States of America
Custom software development firm that builds new products and rescues troubled projects, mainly in healthcare, data and AI
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Why #13 (shared): Address in California · In business 20+ years, as stated on its own website, read 6 Oct 2026
Not yet on record: client reviews, vetting.
New Leaders Ventures, LLC.
Web Development · Web Design · E-Commerce Development · Also in United States of America
New Leaders Ventures, LLC. is a software firm based in California that designs, builds and launches web and mobile business software.
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Why #16: Based in California, USA · Founded 2007, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Radixweb
Mobile App Development · Custom Software Development · Search Engine Optimization · Also in India
Radixweb is a custom software engineering company that builds software platforms for enterprises and growing businesses worldwide.
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Why #17 (shared): Address in California · In business 18+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Zeus Group
Mobile App Development · Custom Software Development · Web Development · Also in Ukraine
Zeus Group develops mobile and enterprise software for clients around the world.
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Why #17 (shared): Office in California · Founded 2008, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
CMARIX TechnoLabs
Custom Software Development · Web Development · Web Design · Also in India
CMARIX TechnoLabs is a software development company based in Ahmedabad, India, working with start-ups, small firms and enterprises worldwide.
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Why #19 (shared): Address in California · Founded 2009, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Delta Data Services LLC
CRM · Responsive · Automation · Also in Los Angeles
Zoho consultancy in Los Angeles building workflows, automation and data systems for government, nonprofits and service firms
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Why #19 (shared): Based in Los Angeles, California · Founded 2009, as stated on its own website, read 29 Sept 2026
Not yet on record: client reviews, vetting.
Creative Nights
Analytics · Responsive · Advertising · Also in United States
UX design and technology consultancy building accessible, fast websites and web applications for organisations in regulated sectors
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Why #19 (shared): Office in California · Founded 2009, as stated on its own website, read 28 Sept 2026
Not yet on record: client reviews, vetting.
Spiral Scout
Mobile App Development · Social Media Marketing · Web Development · Also in United States of America
Spiral Scout is a software development company headquartered in San Francisco, California.
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Why #22: Based in San Francisco, California, USA · In business 16+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
Calibraint Technologies
Mobile App Development · Web Development · Web Design · Also in United States of America
Calibraint Technologies is a software engineering company focused on artificial intelligence, blockchain and Web3.
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Why #23: Address in California · In business 11+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.
ISOOSI Marketing Agency
CMS · Industrial · Also in Florida and Cayman Islands
ISOOSI Marketing Agency is a web and marketing firm with offices in Naples, Florida and Simi Valley, California.
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Why #24 (shared): Based in Naples, Florida, with a second office in Simi Valley, California · In business 10+ years, as stated on its own website, read 5 Oct 2026
Not yet on record: client reviews, vetting.

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Top Software Development Companies in California

JetRuby Agency 2010

Saritasa

Art+Logic

JCCS Computer Consulting

WeblineGlobal

Framework Solutions LLC

e4k Digital Agency

Artisan Crew Engineering

LDA Interactive, LLC.

ITegrity Web Technologies

Svitla Systems

SSD Software Solutions

Treeline

Infoshare Systems, Inc

Mev, LLC

New Leaders Ventures, LLC.

Radixweb

Zeus Group

CMARIX TechnoLabs

Delta Data Services LLC

Creative Nights

Spiral Scout

Calibraint Technologies

ISOOSI Marketing Agency

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