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.

TouchZen
VerifiedVerified by the DesignRush team for authenticity and credibility.Premiere Mobile Applications
TouchZen Media builds iOS, Android, and Flutter apps using React Native, with 75+ apps launched and 12 featured by Apple and Google. Its team has worked with UCLA and Beachbody. The software development agency is best for startups seeking a senior-only mobile app partner in the $40K-$100K range...
Top Services:
- Mobile App Development
- Product Design
- UI/UX Design
- Design Services
- Web Design
- Show more
- Location
- Irvine, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $70/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 accountsTouchZen Services
Data sourced from the agency's DesignRush profileUCLA Beachbody FullyRaw by Kristina Children's Hospital Los Angeles Harman/Kardon Amalfi Jets JetBay SHRED Get Cover Cancer Buddy
TouchZen Reviews & Testimonials

Mobile App Development Review from Shaya Ghanouni
The Touchzen team was amazing!! They were always responsive and ready to incorporate our feedback. The quality of their work was great and the tips they gave us during development were extremely helpful. We would gladly work with them again.

Mobile App Development Review from Domenic Fraboni
We couldn't be more pleased with our experience with TouchZen. They took over a bad situation left behind by our previous development team and have been able to continue to build new features while cleaning up the old project. We have been very pleased with their developers responsiveness as well as the project management. I would highly recommend working with them for any of your web or mobile app development needs.

B2C Apps Review from Brett Lassig
We have been extremely impressed with TouchZen's development team behind the Get Cover Mobile App. Their approach has been collaborative, and responsive to the needs of our warranty and claims environment.The app is intuitive for end users while still delivering the robust functionality needed on the backend, especially around claims processing, and real-time updates.Their diligence has made a significant impact. Features like streamlined claim submission, status tracking, have enhanced both customer satisfaction and operational efficiency.Overall, this highly capable and professional development team has delivered quality work and stands behind it. We look forward to continuing to build and scale with them.
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
Data sourced from the agency's DesignRush profilevTech Toku Logi TripScout PushPress Trustify SkyLab Speek Instantly ANX
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 ReviewsEnterprise AI Solutions | Scalable . Flexible. Sustainable
Seasia Infotech is a global AI-powered digital engineering company with 25+ years of experience delivering custom software, AI solutions, cloud applications, mobile apps, and enterprise platforms. We help businesses accelerate innovation, improve efficiency, and drive digital transformation...
Top Services:
- Software Development
- Mobile App Development
- Web Development
- AI Development
- Big Data Analytics
- Show more
- Location
- Emeryville, California
- Number of Employees
- 500 - 999
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 65 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsSeasia Infotech Services
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Seasia Infotech Reviews & Testimonials

eCommerce Development Review from cornelia verden
This Company is AMAZING, they are very professional. We hired them to build my website, and they did an EXCELLENT job. They continuously communicated with me during the development phase. If you want a beautiful, well-designed, professional website that has optimum functionabilty, You must go with Seasia Infotech. You can always expect excellent quality services from the professionals at Seasia Infotech.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Bytes Technolab Inc.
VerifiedVerified by the DesignRush team for authenticity and credibility.Engineered for the AI Era
Bytes Technolab Inc. is dedicated to driving digital transformation for global enterprises as a trusted enterprise software development agency. Specialized knowledge positions us as industry leaders in AI, product engineering, and workflow automation. Visit our site to learn more...
Top Services:
- AI Development
- Web Development
- Mobile App Development
- Software Development
- Web Design
- Show more
- Location
- Pleasanton, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $20/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 12 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsBytes Technolab Inc. Services
Data sourced from the agency's DesignRush profileHealthy Planet Canada Ragnar Alliance Consume Group Celebration Giftware NEBO
Bytes Technolab Inc. Reviews & Testimonials

Web Development Review from Rocco Bombardieri
The Bytes Technolab team combines talent and efficiency seamlessly. They consistently deliver high-quality work, with a project manager ensuring everything stays organized. Every project theyve handled has been executed flawlessly and delivered on time. Their dedication, along with the hard work of team members like Sachin and Shubham, has made them a valuable and reliable partner in our operations.

Web Design Review from Richard Jones
We've been working with Bytes Technolab for some time now and we're thoroughly impressed with their services. Their team is highly skilled and experienced in web, mobile, and Magento development and have provided us with tailored business solutions for our company, resulting in a huge boost to our website and sales traffic!Despite the time difference, their team is very communicative, patient, and professional. I would highly recommend Bytes Technolab to anyone looking for a team of high-quality web developers and marketers!

Web Development Review from Devin White
I can highly recommend the Bytes Technolab team. I've worked with Bytes on 3 different projects now and have been highly impressed. The attention to detail is strong, they work quickly, and they communicate well.Across 3 projects, I can only remember one instance of dissatisfaction, which was immediately resolved and fixed. What impresses me most about Bytes is the level of value that they provide. Highly recommend.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Solveit
Award WinnerRecipient of a Best Design Award for outstanding work.100% Focused on Apps
We design and develop top-rated mobile and web apps for startups and SMEs. E-commerce, Healthcare, Marketplaces, and more. Our clients rate us for 5 out 5 - check out why!...
Top Services:
- Mobile App Development
- Software Development
- Web Design
- Design Services
- AI Development
- Show more
- Location
- San Francisco, California
- Number of Employees
- 50 - 99
- Average Hourly Rate
- $45/hr
- Minimal Budget
- $25,000 - $50,000
- Portfolios Count
- 32 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsSolveit Services
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Solveit Reviews & Testimonials

Staff Augmentation Review from Mitya Smusin
Solveit managed our comprehensive eCommerce project, developing a full-featured web platform with Node.js and React technologies. The agency also created a Flutter-based mobile app for seamless data synchronization across iOS and Android devices. We were thoroughly pleased with Solveit's expertise and adherence to deadlines. It provided timely updates and communicated openly about our project's status. Solveit's proactive approach and transparency were exceptional, particularly during the staff augmentation process, where the agency efficiently matched us with qualified candidates and facilitated a smooth onboarding. We were satisfied with Solveit's high-quality work and exceptional support.

Design Services Review from Anna Harissis
They have an incredibly hardworking team at affordable pricing. SolveIt has built the app earlier than expected, and they continue to complete new tasks within the client's budget and timeline.

iPhone Review from Gabriel Sabadin
We engaged SolveIt to develop a minimum viable product (MVP) app, including a user-friendly iOS design, an artificial intelligence (AI) model, and a monetization strategy while ensuring General Data Protection Regulation (GDPR) compliance and preparing for future integrations. Despite a tight deadline, SolveIt delivered the app on time and efficiently handled beta-testing within three months, allowing us to gather feedback and launch successfully. We acquired our first 1,000 users within a month of launching the app. SolveIt's team communicated effectively, addressed issues proactively, and maintained a high level of autonomy, bringing diverse expertise that greatly benefited our project. We appreciate the agency's dedication and professionalism.
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
Automate Innovate Dominate.
HashStudioz Technologies is an award-winning product development company providing innovative IT solutions to clients from startups to Fortune 500 firms. With a team of over 1,000 experts, they have successfully completed 200+ projects, offering advanced technologies such as IoT, Blockchain, Cloud Computing...
Top Services:
- Software Development
- IoT
- Mobile App Development
- DevOps Consulting
- Cloud Consulting
- Show more
- Location
- Altadena, California
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $30/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 4 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsHashStudioz Technologies Services
Data sourced from the agency's DesignRush profileTHINK Gas Fyrii JoyScore
HashStudioz Technologies Reviews & Testimonials

Software Development Review from Ryan Kenning
HashStudioz Technologies is a huge contributor in helping us update our systems. They've built internal portals for our customer base and our dealer base, and as we continue to grow, we use them to enhance those two solutions they created for us.Regarding the process, we start with a meeting to lay out what we want, whether it's a solution or an upgrade to a solution. We look to them for advice and insight, what theyve seen, and what they think is the best way for us to go theres back and forth communication regarding getting everything set up. After that, they put out a great statement of work for us and have a kickoff meeting to start the task weve known each other for so long that everything is routinary.we are delighted with the functionalities that HashStudioz Technologies has developed over the years, which has streamlined our processes. we also praise their friendly approach to explaining things and making everything smooth.

Software Development Review from Dan Moscatiello
We evaluated several proposals and HashStudioz Technologies provided a solution that best fit our organization. There were several vendors and we were satisfied with our options and ultimately selected Fingent.The software had to account for company data, student data, course data and bring those data points together in a complete CRM package. The software is effective and improving our business efficiency and performance.Overall, the engagement with HashStudioz Technologies yielded positive results.They collaborated well with us. Moreover, the team was responsive and accommodating to our needs and change requests.

Software Development Review from Robert Learney
HashStudioz Technologies developed our devices UX/UI so we could view and pull data. The goal was to have interface capabilities to turn the data into explainer graphs and the ilk. At the beginning of the project, I provided HashStudioz Technologies team with Arduino-based demo boards that interacted with specialized frontend hardware that captured usable data. I also gave HashStudioz Technologies information about the protocol and data format I was using. HashStudioz Technologies delivered a usable UX/UI that met our needs within two sprints, despite working with hardware they had no experience with. we were satisfied with HashStudioz Technologies's work and project management we had sprint review meetings and project progress meetings with the project manager.
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsProvide IT Solutions.
We are IT company which provides services in various domains like Logistics, Health, e-commerce, etc. We have expert-level knowledge in web development and mobile development, as well as proficient knowledge of latest IOT-based applications using various AWS services...
Top Services:
- Web Design
- eCommerce Development
- Web Development
- DevOps Consulting
- Software Development
- Show more
- Location
- Los Angeles, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 6 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsiCommuneTech Services
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AI-Native Digital Engineering
Build faster. Modernize smarter. Scale with the right engineering team...
Top Services:
- Web Development
- Software Development
- Mobile App Development
- AI Development
- Software Testing
- Show more
- Location
- San Francisco, California
- Number of Employees
- 500 - 999
- Average Hourly Rate
- $25/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 15 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsCapital Numbers Services
Data sourced from the agency's DesignRush profileReuters Consumer Reports ST Engineering Condé Nast Fundation Stoneacre Motor Group Mount Sinai Doosan DigitalMarketer CreditSesame
Software, Mobile App, Games Development Company.
The App Founders is a recognized leader in the mobile app development industry that excels in building mobile apps to upscale your business and bolster your customer retention rate. Well transform your idea into a market-ready application on schedule and within budget...
Top Services:
- Mobile App Development
- Software Development
- eCommerce Development
- Product Design
- CRM Consulting
- Show more
- Location
- Santa Clara, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $70/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 accountsThe App Founders Services
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The App Founders Reviews & Testimonials
Walter White's Review Sourced from Google
Initially, The App Founders showcased a pro-found grasp of blockchain technology and its practical applications. They adeptly elucidated intricate concepts in a manner that resonated with my non-technical background, facilitating smoother communication and active involvement in developmental discussions.
Dustin Wheeler's Review Sourced from Google
it was such a pleasure working with App Founders and just how easy and professional they were. I quickly realized how the industry is full of thirsty, needy bots and scammers I’m trying to get your attention, but tons of unsolicited phone calls and texts. Dealing with these guys was a breath of fresh and definitely showed up in value above all the rest.
Munna Alam's Review Sourced from Google
Got to say, The App Founders really impressed me! They totally nailed the design for my mobile game. Can't wait to team up with them again to make and promote the game. Definitely recommending them to anyone looking for top-notch game development services!
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsSoftware engineering partner for the AI era
Axon Active is a 100% Swiss-owned AI software development company with 650+ engineers in Vietnam, helping organizations build new digital products, modernize legacy systems, and continuously evolve software...
Top Services:
- Software Development
- Mobile App Development
- IT Services
- AI Development
- IT Compliance Solution
- Show more
- Location
- San Francisco, California
- Number of Employees
- 500 - 999
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsAxon Active Services
Data sourced from the agency's DesignRush profileAxon Vibe Axon Fintech bydo
AI That Transforms Businesses
Mindera Software Craft specializes in crafting robust IoT solutions through high-performance, scalable software systems. From product development and performance testing to technology consultancy, we provide end-to-end services tailored to your needs...
Top Services:
- Software Development
- Software Testing
- IoT
- DevOps Consulting
- UI/UX Design
- Show more
- Location
- Los Angeles, California
- Number of Employees
- 250 - 499
- Average Hourly Rate
- $50/hr
- Minimal Budget
- $50,000 & Up
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsMindera Software Craft Services
Data sourced from the agency's DesignRush profileMitek - A Global Leader in Identity Verification TVG - Online Horse Wagering Net-A-Porter - Luxury Goods Marketplace TUI Group - The World’s Leading Tourism Group Not On The High Street Global Marketplace Statful Telemetry SaaS PlayerIndex - Sports Betting
Enable, innovate, transform
A team of Tech-savants focused on simplifying complexities in the technology realm. We combine our technical expertise with product mindset that helps Enterprises to strengthen and transform their business by providing state-of-the art software development services...
Top Services:
- Software Development
- Mobile App Development
- Blockchain
- Software Testing
- AI Development
- Show more
- Location
- Fremont, California
- Number of Employees
- 100 - 249
- Average Hourly Rate
- $30/hr
- Minimal Budget
- $10,000 - $25,000
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsAgile Soft Systems Services
Data sourced from the agency's DesignRush profileStanford University HighWire Press McGill Teak
Agile Soft Systems Reviews & Testimonials
Namita Mahajan's Review Sourced from Google
My experience at AgileSoft System, Inc. has been excellent. The management had been too supportive of every requirement for learning. Weekly meetings, fun activities, and brainstorming on new technology/projects make the workplace impressive and allow growth. Even your workmates are always ready to assist you in every doubt and make sure you follow the right path. Overall, the company is an incredible journey and a great learning place.
shekhar choudhari's Review Sourced from Google
Agile Soft Solutions is a very good company to work in while enjoying it at the same time. The work culture is very amazing. Management is very supportive whenever there is some kind of support required. The company also encourages and recognizes the effort of every associate. This motivates me to work even much smarter and harder. Finally, I am very much glad and lucky to work and share my views in the company.
Ashish Kumar's Review Sourced from Google
I have worked with AgileSoft Systems, Inc. for the last 2.1 years. I started my professional career with the company as a Fresher. The experienced seniors of the company provide excellent training and learning to Freshers. I got the opportunity to work with international clients that really upskilled my talent. Here are some of my personal experiences with them:- On-time Salary and didn't lay off any employee during the pandemic.- They provide complete flexibility to employees including break timings and shift timings- World-class Infrastructure and facilities.- Organize outings- Supportive co-workers
Reviews verified by DesignRush and sourced from the agency's profile View All ReviewsHonest, Practical, & Focused On Results
Founded in 2005 in Reading (UK) Naxtech is a Digital Agency focusing on helping businesses grow, increase profitability, while attracting new customers via the effective use of technology and digital marketing...
Top Services:
- Web Development
- Digital Marketing
- Mobile App Development
- SEO
- Content Marketing
- Show more
- Location
- San Francisco, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $100/hr
- Minimal Budget
- $1,000 - $10,000
- Portfolios Count
- 3 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsNaxtech Services
Data sourced from the agency's DesignRush profileAccor Hotels Hilton EyeForTravel EyeForPharma Intel Servier Laboratories Astellas Hong Kong Polytechnic University FutureSource Consulting Reed Exhibitions
When UX & AI Both Matter
Our PORTFOLIO INCLUDES marketplaces, e-commerce, workflow automations, AI assistants, corporate websites, banking apps, data warehouse initiatives, and more...
Top Services:
- AI Development
- Web Development
- eCommerce Development
- Software Development
- Web Design
- Show more
- Location
- San Mateo, California
- Number of Employees
- Under 49
- Average Hourly Rate
- $37/hr
- Minimal Budget
- $10,000 - $25,000
- Portfolios Count
- 4 Projects Listed
Data sourced from the agency's DesignRush profile, its website, and other relevant accountsimaga Services
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