Our analysts identified the top outsourcing software development companies in California providing cutting-edge services that answer key business problems, from building technical software, designing websites or mobile apps to integrating operating systems and more. Narrow down your search by team size, budget, reviews and more to select the best developer for your company’s needs.
Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

Designli
VerifiedVerified by the DesignRush team for authenticity and credibility.AI LeaderRecognized for strong visibility across AI-powered search and answer engines.+1Award WinnerRecipient of a Best Design Award for outstanding work.Build software people actually pay for.
Designli is a Greenville, South Carolina-based software development agency that partners with non-technical founders to build revenue-generating products. The TractionLab program guarantees a live product with a real user within 30 days or the next month is free. Their Hypothesis-Driven Development approach...
Top Services:
- Mobile App Development
- Software Development
- AI Development
- Web Development
- Web Design
- Show more
- Location
- San Francisco, California
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $85/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 17 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsDesignli Services
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Designli Reviews & Testimonials
Mobile App Development Review from Anonymous
Designli delivered a high-quality prototype on a tight timeline. The team was responsive to feedback, met every deadline, stayed within budget, and quickly adapted to requested changes. Their expertise in app design and development was evident throughout the project and left a strong impression.
AI UI/UX Design Review from Anonymous
Designli produced a complete, functional Figma prototype for our solution. They communicated clearly through virtual meetings and stood out for their strong process, gathering feedback from multiple stakeholders and delivering on schedule. Overall, we were very impressed with their work.
AI UI/UX Design Review from Anonymous
Designli delivered Figma wireframes that were both well-crafted and well-received by our team. The designs were clean, intuitive, and elegant, reflecting strong design intuition. Throughout the process, the team stayed organized, communicated clearly via Basecamp, and delivered everything on time.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsBring your vision to life
When startups and enterprise clients need scalable custom software, HDWEBSOFT delivers web, mobile, and serverless solutions using ReactJs, Angular, .NET Core, Java, and AWS from its Ho Chi Minh headquarters. The 250 - 499 engineer team completed a financial services mobile app using .NET on schedule, a...
Top Services:
- Web Development
- IoT
- Mobile App Development
- Software Development
- Big Data Analytics
- Show more
- Location
- Pasadena, California
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $35/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 12 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsHDWEBSOFT Services
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HDWEBSOFT Reviews & Testimonials

Web Development Review from Jason Harvison
HDWEBSOFT did a fantastic work that aided the client in expanding their business, particularly in terms of growing website subscriptions. The project began on schedule and opened up a lot of opportunities for the business.

Web Development Review from David Zalik
Using a smooth user interface, HDWEBSOFT effectively updated our landing page, enticing visitors to sign up for the product's waitlist. The staff provided a customized strategy and was incredibly responsive, driven, and enthusiastic. They also used ClickUp for project administration.

Mobile App Development Review from Max Levchin
We've partnered with HDWEBSOFT who have created our app using .NET. The feedback from our customers we've received has been overwhelmingly good. We had heard positive things about the idea even before we released the app, so it's encouraging to see those comments continue once it has been out. HDWEBSOFT was set up from the start. The design team was outstanding; they completed the job on schedule and within our allocated budget. They followed a well-defined procedure that was in place.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsAI-First Company for Rapid Product Development
We are global web3.0 Software engineering company making success stories for more two decades with highly motivated and experience teams and a proven agile framework. we prioritize the commercial goal of our customer deliver the highest business value. we are a renowned blockchain app development company in...
Top Services:
- Blockchain
- AI Development
- Mobile App Development
- Software Development
- Web Design
- Show more
- Location
- San Francisco, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 7 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsNetSet Software Solutions Services
Data sourced from the agency's DesignRush profileRiskcare BetFolio EFX Inc. BotFather AI Health Assistant
NetSet Software Solutions Reviews & Testimonials
Mobile App Development Review from Kowshik Mullapudi
When we hired NetSet Software Solutions to create our enterprise mobile apps, they promptly produced excellent, user-friendly solutions. Throughout the process, their team demonstrated professionalism, promptness, and attention to our needs.

Blockchain Review from Rakesh Thakkar
Throughout every phase of our product journey, the Blockchain-Based Supply Chain Tracking System provided us with the visibility and control we required. It increased openness, decreased mistakes, and assisted us in guaranteeing the genuineness and caliber of our food and drink products. Our activities are now more dependable and effective thanks to the solution.

Blockchain Review from Mark Trudeau
Our capacity to track and monitor our food and beverage items from farm to retailer has significantly increased thanks to the Blockchain-Based Supply Chain Tracking System. Our processes are now more dependable and efficient due to the enhanced transparency, decreased errors, and guaranteed product authenticity.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsRanked #1 Software & App Development Company
Vrinsoft is the most promising IT solution providing company, based in India which is a one-stop shop for all your business needs. We are a Microsoft certified IT company, which besides rendering professional and comprehensive business solutions also cater a range of services in mobile technologies...
Top Services:
- Mobile App Development
- Software Development
- Web Design
- Web Development
- eCommerce Development
- Show more
- Location
- Los Angeles, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 16 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsVrinsoft Technology Services
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Vrinsoft Technology Reviews & Testimonials

Software Development Review from Fahad Khan
I recently had the pleasure of working with Vrinsoft Technology for my software development project, and I must say, the experience has been nothing short of outstanding. From the very beginning, their team demonstrated utmost professionalism, expertise, and a genuine commitment to delivering high-quality solutions. I am delighted to share my positive experience with this exceptional software development company.

Mobile App Development Review from Binny ronald
We finally collaborated with Vrinsoft Pvt Ltd after conducting extensive research, and we are delighted that we did. We are quite pleased with the outcomes the experts provided us. They were highly knowledgeable and skillful in creating a mobile app by implementing their unique technologies and current trends. If you're searching for a company that offers excellence, knowledge, expertise, and experience, Vrinsoft Pvt. Ltd. is the ideal choice.
Desigirl Patel's Review Sourced from Google
Joining Vrinsoft teams to be a good decision for me. The work culture is friendly, and everyone is great to help.They also offer a good work-life balance, which is rare these days. I look forward to my future here. Best it company in Ahmedabad ❤️
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsBuilding unicorns
We take ideas and turn them into software products users love. Whether it's building the next unicorn or reimagining your existing application. We solve real-life challenges through design thinking and game-changing software. Since 2010...
Top Services:
- Software Development
- Mobile App Development
- Web Development
- UI/UX Design
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $99/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 11 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsUPDIVISION Services
Data sourced from the agency's DesignRush profileIT Industry Fintech Industry Standard Technology
Trusted Software Partner For Global Businesses
Enterprise Software Development and Maintenance Services Provider...
Top Services:
- Software Development
- Mobile App Development
- Web Development
- AI Development
- IT Services
- Show more
- Location
- California City, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $20/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 10 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsMLTech Soft Services
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Get Started With the Magic of AI Transformation!
Yellow Systems has a track record of assisting Y Combinator startups, Fortune 500 companies, and various clients. Get in touch with us to know more!...
Top Services:
- AI Development
- Software Development
- Staff Augmentation
- Web Development
- Show more
- Location
- San Francisco, California
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 12 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsYellow Systems Services
Data sourced from the agency's DesignRush profileWriter AI Meat Eater CHHJ Bionorica US NATP Notion Digital DealStryker Inc. OppSites Drive Focus Separate.us
UI/UX Design And Development Firm For Data-driven B2B SaaS Companies
Making complex products simple, useful, and human...
Top Services:
- Digital Services
- Branding
- Product Design
- Web Design
- UI/UX Design
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $120/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 6 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsD.Workz Interactive Services
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Innovative Digital Solutions For A Smarter Future
Rysysth Technologies is a full-service IT solutions provider specializing in web development, digital transformation, and enterprise solutions. We help businesses scale with modern technologies, user-friendly designs, and performance-driven strategies. From custom websites to cloud-based platforms, our team...
Top Services:
- AI Development
- Blockchain
- Software Development
- Mobile App Development
- Show more
- Location
- Sacramento, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $45/hr
- Minimal Budget
- $10,000 - $25,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsRysysth Technologies Services
Data sourced from the agency's DesignRush profileSoftware & IT Industry Corporate Services Industry eCommerce Industry
Rysysth Technologies Reviews & Testimonials
Ketul Patel's Review Sourced from Google
Blockchain development service company that provides organizations of any size and business domain with blockchain-powered distributed systems. Develop a new blockchain project from scratch or adjust existing solutions with the help of a reliable partners.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsWe build what others quote 3x more for
AISD helps mid-market and enterprise teams build AI-powered products, agents, and workflow automations. Every project is delivered by senior engineers with proven software development and AI experience...
Top Services:
- IT Services
- Staff Augmentation
- Business Consulting
- Logistics
- BPO
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $40/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 1 Project Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsAISD Services
Data sourced from the agency's DesignRush profileY-Combinator Startups Kroger Group Perforce
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