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.

United States × California × Outsourcing Software Development × Energy & Mining × $1,000 - $10,000 ×Clear Filters
  • SynergyTop is a custom software development company

    SynergyTop is a healthcare-focused custom software development company offering healthcare platforms, EHR and FHIR integrations, patient portals, telehealth solutions, AI automation, web development, mobile apps and product engineering services...

    Top Services:

    • Web Design
    • eCommerce Development
    • UI/UX Design
    • Web Development
    • Mobile App Development
    • Show more
    Location
    San Diego, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    7 Projects Listed

    SynergyTop Services

    • Web Design
    • eCommerce Development
    • UI/UX Design
    • Web Development
    • Mobile App Development
    • Software Development
    • Digital Marketing
    • ERP Consulting
    • SEO
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Trimark
    • Stark
    • BizCity
    • Schoolicious
    • Angel Shave Club
    Data sourced from the agency's DesignRush profile

    SynergyTop Reviews & Testimonials

    • Sam Grote
      Sam Grote Founder and Chief Executive Officer at Centerpiece Software
      5.0★

      UI/UX Design Review from Sam Grote

      We were developing the next-generation of our key product and wanted to re-envision the UI/UX to be more modern, focused and intuitive. We were pleased with the deliverables, and we admired how the team took the challenge of handling a high-tech application they weren't previously familiar with. A communicative team, SynergyTop was transparent about their process, and their expertise in design resulted in an efficient workflow.

    • Susan Avarde
      Susan Avarde Strategic Advisor at Presciant
      5.0★

      Mobile App Development Review from Susan Avarde

      We have partnered with SynergyTop for mobile development projects. We have some bandwidth on this area, but for larger scopes of work which needed to be executed in a short period, SynergyTop supplied a much larger team. SynergyTop offered expertise across many complicated technical specifications, and they skillfully handled large-scale, intensive projects. We appreciates how many resources SynergyTop is willing and able to dedicate at a time, which shows their commitment to the work.

    • Dudley Gould
      Dudley Gould VP at Circit
      5.0★

      Mobile App Development Review from Dudley Gould

      SynergyTop successfully launched our app and met our expectations. The team fixed bugs and provided a testing team with impressive skills. SynergyTop had impressive communication skills and was responsive via daily emails and Zoom meetings.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Software & Mobile Application Development Company.

    Rushkar Technology Pvt. Ltd. is a premier software development company based in India, renowned for its commitment to delivering high-quality, timely, and cost-effective offshore software and mobile application solutions. At Rushkar, we prioritize long-term relationships and client satisfaction, ensuring that...

    Top Services:

    • Software Development
    • Mobile App Development
    • Web Development
    • IoT
    • Software Testing
    • Show more
    Location
    Anaheim, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $12/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed

    Rushkar Technology Pvt. Ltd. Services

    • Software Development
    • Mobile App Development
    • Web Development
    • IoT
    • Software Testing
    • AI Development
    • Staff Augmentation
    • eCommerce Development
    • CRM Consulting
    • Cloud Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Galgotta
    • PingZz
    • Homy
    Data sourced from the agency's DesignRush profile

    Rushkar Technology Pvt. Ltd. Reviews & Testimonials

    • Steve O'Brien
      Steve O'Brien CEO at NEW ICON
      5.0★

      Software Development Review from Steve O'Brien

      Our software development project has received exceptional outcomes from Rushkar Technologies. Their devotion to deadlines, strong code quality, and agile technique have proven essential. We at New Icon value their successful use of Scrum methods and integration of CI/CD pipelines. Strongly advised for any purposes pertaining to advanced growth.

    • Aravind Kumar Thakur
      Aravind Kumar Thakur Deputy Manager at KEI INDUSTRIES LIMITED
      5.0★

      Web Development Review from Aravind Kumar Thakur

      I am grateful for the chance this service has given me. I received good, friendly service from Rushkar Technology. They made sure that my specifications were satisfied by providing a multitude of design and formatting possibilities. They also gave access to all the data required to maintain the site's functionality. An amazing team offering a priceless service to the manufacturing of electrical and electronic.

    • Daniel Ari Feldmar
      Daniel Ari Feldmar Chief Operating Officer at Felbro Food Products, Inc
      5.0★

      Mobile App Development Review from Daniel Ari Feldmar

      For our project on food manufacturing, we hired Rushkar. This was made possible by the agency's outstanding support throughout the project, which included proactive problem-solving, innovative solutions, and meticulous attention to detail. At first, reaching a consensus on project objectives was the biggest obstacle, but Rushkar swiftly made plan adjustments and engaged in open communication to address problems. Our business was greatly enhanced by its solution, which also improved consumer involvement. Rushkar continues to be a reliable partner for our upcoming initiatives, even though it might further improve its excellent work with faster reaction times and more service options.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Custom Software That Works In The Real World

    SoftDoes is a Kansas City custom software and AI development company that designs and builds web platforms, mobile apps, MVPs and AI automation. Written scope and price before code, 100% IP ownership, rated 5.0 on Clutch...

    Top Services:

    • Software Development
    • AI Development
    • Mobile App Development
    • Web Development
    • UI/UX Design
    • Show more
    Location
    San Francisco, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $75/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    10 Projects Listed

    SoftDoes Services

    • Software Development
    • AI Development
    • Mobile App Development
    • Web Development
    • UI/UX Design
    • Cloud Consulting
    • Software Testing
    • Digital Strategy
    • Big Data Analytics
    • Web Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Altera
    • Brizacorp
    • Color and Harmony
    • FMY Orthodontics
    • Ulala
    • WIX
    • Reclaim
    • Route One Consultancy
    • PacificWest
    • GLS Media LLC
    Data sourced from the agency's DesignRush profile

    SoftDoes Reviews & Testimonials

    • Yuliia Ten
      Yuliia Ten Review from Google
      5.0★

      Yuliia Ten's Review Sourced from Google

      I started working with SoftDoes when our product had already grown beyond the point where small fixes were enough. We needed to rethink several parts of the system and make sure the next stage of growth would not create even more technical debt.The team got into the project fast. Within the first few weeks, they helped us identify the main bottlenecks, clean up several fragile integrations, and improve the parts of the platform that were slowing us down the most.One practical result was that a key operation that used to take around 4-5 minutes now takes less than a minute. I also saw a noticeable drop in recurring technical issues after the release.What I liked most was the way they worked with us. Very little ceremony, clear communication, good technical judgment, and a strong sense of ownership.I’d be happy to work with SoftDoes again on another complex software project.

    • Ryder Mackey
      Ryder Mackey Review from Google
      1.0★

      Ryder Mackey's Review Sourced from Google

      My experience with SoftDoes has been extremely disappointing. Their communication is terrible, the people I dealt with were highly unprofessional, and their pricing is absolutely outrageous compared to the value of the work being delivered.One of my biggest concerns is the company’s lack of transparency. From what I’ve observed, their development work appears to be outsourced to people in Ukraine through another company called Come Back Agency. Even when I searched for SoftDoes online, its website appeared to redirect to Come Back Agency.Take a look at their LinkedIn yourself. They present themselves as a Kansas City-based company, yet I couldn’t find a single employee listed as being based in Kansas City. That raises serious questions about their business structure, where their team actually operates, and who you’re really paying to develop your software.My interactions with the CEO, Orest, were particularly unpleasant. I found him extremely arrogant, dismissive, and condescending. He speaks to customers as though they’re beneath him. Rather than addressing legitimate concerns professionally, his attitude made an already frustrating experience even worse.Their Google reviews also raised serious red flags for me. Several reviewer profiles appeared to have AI-generated profile pictures, and the reviews themselves read as though they were written by ChatGPT rather than genuine customers. Many of these accounts had only ever reviewed SoftDoes.After I confronted them about these concerns, I noticed that some profile pictures had been changed to what appeared to be stock images, and the accounts had gained an additional review of random places. I cannot independently verify who operates these accounts, but the timing and patterns made me seriously question the authenticity of their online reputation.Nothing about my experience with SoftDoes has inspired trust. If you’re looking for custom software development, do yourself a favor and look elsewhere. Verify who you’re actually doing business with, who will be developing your software, and what you’re paying for.

    • Kevin Parker
      Kevin Parker Review from Google
      5.0★

      Kevin Parker's Review Sourced from Google

      We had been running a large part of our business through spreadsheets and a mix of different tools for years. We've grown past spreadsheets now. SoftDoes built a custom platform around the way our team actually works. That's probably what we appreciated most about working with them.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • 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

    HashStudioz Technologies Services

    • Software Development
    • IoT
    • Mobile App Development
    • DevOps Consulting
    • Cloud Consulting
    • AI Development
    • Web Development
    • Business Consulting
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • THINK Gas
    • Fyrii
    • JoyScore
    Data sourced from the agency's DesignRush profile

    HashStudioz Technologies Reviews & Testimonials

    • Ryan Kenning
      Ryan Kenning Project Manager at NEC Financial Services
      5.0★

      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.

    • Dan Moscatiello
      Dan Moscatiello General Manager at The Training Center
      5.0★

      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.

    • Robert Learney
      Robert Learney Co-Founder & Director at Accunea Ltd.
      5.0★

      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 Reviews
  • 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

    Capital Numbers Services

    • Web Development
    • Software Development
    • Mobile App Development
    • AI Development
    • Software Testing
    • Staff Augmentation
    • Cloud Consulting
    • eCommerce Development
    • WordPress Website Design
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Reuters
    • Consumer Reports
    • ST Engineering
    • Condé Nast
    • Fundation
    • Stoneacre Motor Group
    • Mount Sinai
    • Doosan
    • DigitalMarketer
    • CreditSesame
    Data sourced from the agency's DesignRush profile
  • AI product studio - agents, automation, computer vision & digital twins, shipped to production.

    Waveo is an AI product studio in Irvine, CA. We design, build, and ship production AI for operations-heavy companies without an in-house AI team: AI agents and automation, computer vision, digital twins and IoT, and predictive AI. Idea to production in weeks. Real engineering, not no-code. Clients own the...

    Top Services:

    • AI Development
    • Software Development
    • IoT
    • Mobile App Development
    • Big Data Analytics
    • Show more
    Location
    Irvine, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $125/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    5 Projects Listed

    Waveo Services

    • AI Development
    • Software Development
    • IoT
    • Mobile App Development
    • Big Data Analytics
    • Web Development
    • UI/UX Design
    • Cloud Consulting
    • eCommerce Development
    • Software Testing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Confidential — Logistics
    • Confidential — HealthTech
    • Confidential — Automotive
    Data sourced from the agency's DesignRush profile
  • Best award-winning software development company in South Korea.

    Time Tec South Korea is a top-rated, multi-award-winning software development company providing a full suite of services and solutions like mobile application development, software development, Microsoft Dynamics 365 development, web development, ServiceNow consulting, and cybersecurity consulting to small...

    Top Services:

    • Software Development
    • AI Development
    • Mobile App Development
    • Cybersecurity
    • Show more
    Location
    Roseville, California
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000

    In Time Tec South Korea Services

    • Software Development
    • AI Development
    • Mobile App Development
    • Cybersecurity
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • TruckStop
    • Rise Services
    • Fullbay
    Data sourced from the agency's DesignRush profile
  • AI-driven custom software development for complex, high-growth industries.

    NEKLO is an international custom software development partner. Since 2008, weve specialized in building and scaling digital products for high-stakes industries, including Healthcare, Fintech, Energy, and Construction...

    Top Services:

    • AI Development
    • Software Development
    • Mobile App Development
    • Product Design
    • Software Testing
    • Show more
    Location
    Burlingame, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    4 Projects Listed

    NEKLO Services

    • AI Development
    • Software Development
    • Mobile App Development
    • Product Design
    • Software Testing
    • Staff Augmentation
    • Managed Services
    • IT Services
    • Big Data Analytics
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Lulu and Georgia
    • Raken
    • Planet Blue
    • Belleze
    • My1stYears
    • JustBeeKids
    • Complete Solar
    • Call Loop
    • Implentio
    • TeamDays
    Data sourced from the agency's DesignRush profile
  • We Elevate Brands From Good to Great.

    At AlphaSquad Technologies, we transcend mere development to craft transformative digital experiences. With unmatched proficiency in Web Development and Mobile Application Development, we pave the way toward an innovative, digitally evolved landscape. Our specialization lies in pioneering Website Design...

    Top Services:

    • Mobile App Development
    • Digital Services
    • Product Design
    • Web Design
    • UI/UX Design
    • Show more
    Location
    San Francisco, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000

    AlphaSquad Technologies Services

    • Mobile App Development
    • Digital Services
    • Product Design
    • Web Design
    • UI/UX Design
    • Web Development
    • eCommerce Development
    • Software Development
    • Digital Marketing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • SigmaGo Solutions
    • Calonic
    • JoinMil
    • Sunkara
    • Edufeel
    Data sourced from the agency's DesignRush profile

The Benefits Of Top Outsourcing Companies In California

Why companies trust DesignRush

Every agency is independently vetted before it can be listed or ranked

1

Identity Check

We verify businesses and reviewer LinkedIn profiles for integrity.

Agencies vetted
128,634+
2

Portfolio Review

We review agency work, case studies, and results to confirm skill.

Applicants rejected
48%
3

Ongoing Audit

We monitor listings regularly; outdated agencies are removed.

Agencies verified
9

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See how rankings and monetization work.