Our expert analysts identified the top Ruby On Rails developers in California that can build high-performance websites, applications, eCommerce stores, service marketplaces, online libraries and more using the feature-rich software. Discover the best companies in the table below and filter listings by price, reviews and size to choose one that fits your business needs.

Best Ruby On Rails Development Companies in California

9 Companies - Rankings updated: August 26, 2026

Each agency undergoes DesignRush evaluation for professional expertise and genuine client satisfaction to assist your search. Some featured placements are paid.

United States × California ×
  • HIGH QUALITY SOFTWARE COMPANY IN VIETNAM

    With over 10 years of expertise, AgileTech Vietnam stands at the forefront of delivering innovative technology solutions across a wide range of industries. Our team of 300+ skilled developers has completed more than 1,000 successful projects, ranging from dynamic startups to large-scale enterprises...

    Location
    Irvine, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    50 Projects Listed

    AgileTech Services

    • Web Development
    • WordPress Website Design
    • UI/UX Design
    • eCommerce Development
    • Web Design
    • Software Development
    • Mobile App Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Clingme
    • Luxstay
    • Lian
    • Ferosh
    • Alosong
    • Stardary
    • Tizo
    • Jupviec
    Data sourced from the agency's DesignRush profile

    AgileTech Reviews & Testimonials

    • Noah Petraitis
      Noah Petraitis Project Manager at National Technologies (NTI)
      5.0

      Mobile App Development Review from Noah Petraitis

      AgileTech excelled in supporting our project from initial mock-ups through to the final delivery on the App Store, incorporating data analytics that we could easily share with our customers. The scope of work included mock-up creation, UI/UX design, interactive prototyping, app development, rigorous testing, and setting up a secure production environment on AWS, culminating in the apps release on both iOS and Android platforms.

    • Selva Jayaraman
      Selva Jayaraman Owner at Business Integra Inc
      5.0

      Software Development Review from Selva Jayaraman

      Working with AgileTech has been an amazing experience, especially when it comes to creating a personalized e-learning program for our IT services business. We were pleasantly surprised by how adaptable and scalable the platform developed by the AgileTech Team was. Their proficiency with user-friendly course administration and community participation technologies enabled us to provide a thorough instructional resource catered to our customers' particular requirements. The platform has greatly improved our operational efficiency, and we are amazed by its capacity to manage heavy traffic with ease and offer comprehensive reporting and analytics. The platform remained successful and user-friendly because of the team's dedication to continuous support and their quick response to criticism. For any organization looking to create innovative and reliable digital solutions, we wholeheartedly recommend AgileTech as a partner.

    • Preci Capiral
      Preci Capiral Owner at TechnoSphere, Inc.
      5.0

      Software Development Review from Preci Capiral

      AgileTech provided a superb Learning Management System (LMS) that creatively and precisely addressed the intricate needs of our organization. Within a scalable, completely customizable platform, the LMS made it possible to create comprehensive courses, administer student tests, engage the community, and obtain real-time data insights. AgileTech's modular and agile approach made sure that every component, from the user-friendly course builder to the sophisticated analytics and communication tools, was customized to meet our demands despite the difficulties of developing such a feature-rich system. In order to guarantee perfect scalability and zero downtime, even with high user concurrency, AgileTech used a potent tech stack that included PHP, React, and AWS. Their post-launch assistance, which included frequent training sessions and upgrades, gave our staff the means to fully use the LMS's potential. This project was a testament to AgileTech's technical skill, rapid deployment, and dedication, making them an outstanding choice for educational technology development.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • DD.NYC®

    Verified Verified by the DesignRush team for authenticity and credibility.

    Result-Driven Agency for Impressive Websites and Branding

    DD.NYC® specializes in modern branding, world-class web design, and innovative graphics. Client roaster including Scholastic, Forbes, VTS, L'Oreal - DD.NYC® is a creative team with detail, ideas, and a solid process...

    Location
    Los Angeles, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $150/hr
    Portfolios Count
    65 Projects Listed

    DD.NYC® Services

    • Web Design
    • Branding
    • UI/UX Design
    • Package Design
    • eCommerce Development
    • Product Design
    • Graphic Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Forbes
    • Scholastic
    • Dupont
    • Havas
    • Wallmart
    • CyberYachts
    • Chef Antoine Lours
    • 1010 Wilshire
    • @globalnewyorker
    • The Arts Building
    Data sourced from the agency's DesignRush profile

    DD.NYC® Reviews & Testimonials

    • Randolph De Lano
      Randolph De Lano Managing Director at The Real Estate Fund
      5.0

      Branding Review from Randolph De Lano

      DD.NYC® developed a website and branding campaign for a real estate investment fund. They were also tasked with creating collaterals for the client's branding efforts. DD.NYC® designed a quality website that exceeded the client's expectations. They completed tasks on time and even ahead of schedule at times. They also went above and beyond to ensure that the client understood the processes for each phase of the project.

    • Alexander Barnes
      Alexander Barnes Senior Project Manager at Seattle Software Development
      5.0

      Web Design Review from Alexander Barnes

      The timeliness, quality, and pricing from DigitalDesign.NYC aligned with the client's expectations. The client is highly pleased with the exceptional and distinctive work produced by DD.NYC®. It responds promptly to communication and feedback, ensuring superior deliverables and a robust project management experience. The team also appreciates agency's readiness to undertake the assignments. (Verified via email)

    • Andrew Fitzgerald
      Andrew Fitzgerald CEO at Maven Energy
      5.0

      Web Design Review from Andrew Fitzgerald

      Great project all around!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • RNO1 | A Global Branding, UX & Digital Growth Partner | $10B+ in Market Growth

    RNO1 is a global branding and digital growth agency for modern brands that refuse to play it safe. We design Radical Digital Experiences that don't just look good: they drive real growth...

    Location
    San Francisco, California
    Number of Employees
    50 - 99
    Portfolios Count
    10 Projects Listed

    RNO1 Services

    • UI/UX Design
    • Web Design
    • Mobile App Development
    • Web Development
    • Branding
    • Product Design
    • Video Production
    • Design Services
    • Digital Strategy
    • Digital Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Airbnb
    • Microsoft
    • Rezolve
    • Dentsu
    • Cox Media Group
    • Ericsson
    • Interos
    • Amount
    • Disney
    • BMW
    Data sourced from the agency's DesignRush profile

    RNO1 Reviews & Testimonials

    • Neil Serebryany
      Neil Serebryany Founder at CalypsoAI
      5.0

      UI/UX Design Review from Neil Serebryany

      I had the pleasure of working with RNO1 on a web transformation project in CalypsoAI and couldn't be happier. Right from the start, it was clear that they had a very skilled workforce, that had data architects as well as UX designers on board. They gave us a first implementation of your platform to work before your deadline and this demonstrates that they are conscious of time and the quality they want to offer. The look and feel design talents of RN01 are on par with the finest User Interface design and UX skills, moreover, the backend programming is also excellent. Most noticeable was their ability to fit into our working environment and improve the efficiency of our team while advancing the projects. Well done and organized they ensured the entire period was smooth and productive. As for web design and CMS development, I have no reservations in recommending RN01. They can really be considered as an innovation partner.

    • DANIEL HARMAN FOUNDER at PRODUCT LABS
      5.0

      UI/UX Design Review from DANIEL HARMAN

      The entire team at RNO1 was instrumental to the successful launch of our Product Management Company. Through the team’s guidance, design direction, and ease of working them as a Global Branding & Digital Agency.

    • Martin Alcala Rubi
      Martin Alcala Rubi CEO at TRYOLABS
      5.0

      Brand Strategy Review from Martin Alcala Rubi

      RNO1 did an amazing job as a value based partner...showing great professionalism and working within tight deadlines. The entire team quickly understood our business needs.

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

    iApp Technologies: Trusted digital product development partner helping brands turn ideas into powerful & scalable solutions. We specialize in designing and building high-performance Web and Mobile Apps (iOS + Android) that align with evolving market demands and deliver measurable business impact...

    Location
    San Ramon, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $20/hr
    Minimal Budget
    Under $1,000
    Portfolios Count
    60 Projects Listed

    iapp Technologies LLP Services

    • Mobile App Development
    • Blockchain
    • AI Development
    • Web Development
    • UI/UX Design
    • Web Design
    • eCommerce Development
    • IT Services
    • WordPress Website Design
    • Wearables
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • VPN Proxy Master
    • Poster App Lab
    • Pool Ride
    • ChiroRing App
    Data sourced from the agency's DesignRush profile

    iapp Technologies LLP Reviews & Testimonials

    • Shubhpreet Sidhu
      Shubhpreet Sidhu CEO at SASA Innovations
      5.0

      Mobile App Development Review from Shubhpreet Sidhu

      iapp Technologies provided an exceptional experience in developing the SASA Rides mobile app for both Android and iOS platforms. Their team demonstrated outstanding professionalism, clear communication, and a strong commitment to delivering high-quality results. Every stage of the app development was handled efficiently, with timely updates and meticulous attention to detail. They were responsive to feedback, proactive in offering innovative solutions, and genuinely dedicated to client satisfaction. The expertise and dedication they brought to the project made the entire process smooth and stress-free. I highly recommend iapp Technologies for reliable, skilled, and client-focused mobile app development.

    • Seth Horsley
      Seth Horsley Founder at StateCert
      5.0

      Web Design Review from Seth Horsley

      I worked with them extensively and they have been very helpful and extremely responsive and have provided very high quality work. Definitely recommend!

    • Gursewak Singh Brar
      Gursewak Singh Brar Director at Third Pole Immigration Services
      5.0

      Web Development Review from Gursewak Singh Brar

      iapp Technologies provided excellent service with timely delivery, clear communication, and high-quality results. Their team is professional, responsive, and truly dedicated to client satisfaction. Highly recommended!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Bringing ideas to life one step at a time.

    Kaizen Apps specializes in innovative application development, offering personalized consultations to turn your ideas into impactful digital solutions. Start your project with our expert guidance today...

    Location
    Vacaville, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $65/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    4 Projects Listed

    Kaizen Apps Services

    • Web Design
    • Web Development
    • IoT
    • AI Development
    • Blockchain
    • Mobile App Development
    • Software Development
    • VR/AR
    • WordPress Website Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Symation, Inc.
    • SheDistrict
    • Plutus Properties
    • Maxim Capital Group
    • GPTBets
    Data sourced from the agency's DesignRush profile

    Kaizen Apps Reviews & Testimonials

    • MaryRuth Ghiyam
      MaryRuth Ghiyam Founder at MaryRuth's
      5.0

      Mobile App Development Review from MaryRuth Ghiyam

      Kaizen Apps is developing a mobile app for us. We provided information to jump start the project, and they gave us samples of similar projects they've done to give us an idea of what to expect. They provided a detailed scope of work that was over 100-pages long. We had several exchanges back and forth to tweak requirements for a few weeks. Our respective lawyers also looked over the scope.  After the scope was approved, the team got into the project launch and began the design phase. The team started with a low-fidelity design and built swim-lanes. After that, they moved into high-fidelity design, which they're about to finish. Additionally, the Kaizen Apps team provides us with consultancy services to help us grow the app. For example, they've advised us on handling customer service and tools we can use to help with that aspect. They've also connected us to other parties that can help us.

    • Vadim Kagan
      Vadim Kagan President at SentiMetrix
      5.0

      Web Development Review from Vadim Kagan

      Our company hired Kaizen Apps to develop our site backend database and front-end. They did a fantastic job. The site was fully coded, from start to finish. It wasn't on WordPress, wix, etc. It also needed to contain a database. There were so many guidelines to follow that I was impressed that each was fulfilled with ease. I was impressed by the ability of receiving a fully working site and also having received SEO & Google Ads setups. An all-around company.

    • Kenneth Barrett
      Kenneth Barrett President at Flint Technologies Solutions
      5.0

      Web Design Review from Kenneth Barrett

      Kaizen Apps provided a full redesign of our website and recreated it in WordPress in a fashion where we can easily make changes without them. Website redesign included homepage development, some coded items to reflect our framework, design ideas to display unique value propositions and many solutions page. The team was responsive and delivered in a timely fashion when we wanted launch to be beginning of the year. The website redesign as offered us a fresh look to reflect our updated solutions/services. It has also helped us on the backend to easily make some changes ourselves. The quick-turn around on requests and design items. Also Kaizen Apps availability to hop on a call - which at times was late at night when we were trying to meet a deadline. Very flexible and their team was committed to pulling it which exceeded my expectations. Kaizen Apps is also very clear on what is feasible, what is not, and price points accordingly - straight shooter - which was very helpful as we were developing ideas.

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

    Verified Verified by the DesignRush team for authenticity and credibility.

    Your spark, our fuel

    Dreamers is a research, data science, and tech consultancy that specializes in building solutions for complex problems. We are based in sunny California, but we work remotely with clients from all over the world. We're engineer-owned and operated, meaning you'll get personal attention and quick answers...

    Location
    Los Angeles, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $150/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    14 Projects Listed

    Dreamers Inc. Services

    • AI Development
    • Blockchain
    • Software Development
    • Mobile App Development
    • Wearables
    • IoT
    • Software Testing
    • VR/AR
    • Big Data Analytics
    • Cybersecurity
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • University of California Los Angeles
    • John Hopkins University Applied Physics Laboratory
    • University of California Santa Barbara
    • University of Michigan
    • SpendLogic
    • Arizona Court of Appeal (Div 2)
    • HyperCite
    • Boeing Aerospace
    • British Aerospace Engineering
    • Adamant Aerospace
    Data sourced from the agency's DesignRush profile

    Dreamers Inc. Reviews & Testimonials

    • Dennis Temko
      Dennis Temko CEO at HyperCite
      5.0

      Software Development Review from Dennis Temko

      Dreamers was the only firm capable of building my ambitious vision for HyperCite. They transformed an unprecedented concept into a patented, production-grade legal technology platform designed for fact-checking. This included help in product strategy, and leading UX, algorithm development, AI, database and cloud architecture, frontend and backend engineering, scalability, observability, CI/CD, deployment, and ongoing maintenance. They delivered two California product versions and a dedicated Arizona implementation integrated directly with the appellate court, where HyperCite has operated for more than five years. Today, HyperCite not only automates hyperlinks between legal briefs and cited records; its AI fact-checking system compares claims against supporting evidence, flags contradictions and unsupported assertions, and takes judges and attorneys directly to the underlying source. The result is faster, clearer, and more reliable judicial review, delivered through close collaboration with HyperCite’s leadership and the Arizona court CIO.

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

    At HyScaler, we're driven by a mission to be your trusted partner in achieving transformative business objectives. Our global vision focuses on harnessing cutting-edge technologies to craft sustainable, intelligent, and secure solutions...

    Location
    Santa Clara, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    6 Projects Listed

    HyScaler Services

    • Mobile App Development
    • Blockchain
    • Software Development
    • AI Development
    • IoT
    • IT Services
    • Cybersecurity
    • Cloud Consulting
    • Web Development
    • Wearables
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Urban Sports Club
    • Artisan
    • Stanford University
    • Khelnow
    • Doctegrity
    • EA
    • Tune Protect
    Data sourced from the agency's DesignRush profile

    HyScaler Reviews & Testimonials

    • David Robinson
      David Robinson Review from Google
      5.0

      David Robinson's Review Sourced from Google

      Can't say enough about this group! Amazing work and great people. You can really tell that the culture here is far above other shops because everyone seemingly loves what they do, and it shows in the final product. Solid work, agreeable rates, and on time delivery. 100% recommend!

    • Ernesto Berrum
      Ernesto Berrum Review from Google
      5.0

      Ernesto Berrum's Review Sourced from Google

      Great group of people to work with. Very flexible and have been delivering on all of our request in a timely manner. Our platform runs on Ruby on Rails but they have Python, Node.js, React, React, and HTML experts on hand.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Aiming to Achieve Your Business Goals Through Technology

    Code Genesis is a full-stack development company dedicated to building scalable and secure digital platforms. We combine expertise in cloud, automation, and modern software engineering to create solutions that are both innovative and reliable. Our mission is to deliver technology that not only meets todays...

    Location
    Santa Clara, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $30/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    7 Projects Listed

    Code Genesis Services

    • Mobile App Development
    • Software Development
    • UI/UX Design
    • AI Development
    • DevOps Consulting
    • Staff Augmentation
    • CRM Consulting
    • Blockchain
    • Web Development
    • eCommerce Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Tristar AI
    • Ultralytics
    • Supper
    • Mainstay
    • Leadzen.ai
    • Spamburner
    • Mula
    • Test Gorilla
    • Achieve
    Data sourced from the agency's DesignRush profile
  • Software Engineering That Creates Value

    We're a global team of developers, designers, and problem-solvers creating impactful software since 2007. IT-Dimension builds future-ready software from AI and IoT to mobile, enterprise, and 3D solutions...

    Location
    West Hollywood, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $49/hr
    Portfolios Count
    4 Projects Listed

    IT-Dimension Services

    • IT Services
    • Mobile App Development
    • Web Development
    • Product Design
    • Web Design
    • Software Development
    • AI Development
    • Blockchain
    • VR/AR
    • IoT
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • IT Industry
    • Fintech Industry
    • Standard Technology
    Data sourced from the agency's DesignRush profile

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