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

11 Companies - Rankings updated: September 06, 2026

All agencies are evaluated on DesignRush for demonstrated expertise and authentic client reviews to support your decision. Certain placements are paid.

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  • Diffco

    Verified Verified by the DesignRush team for authenticity and credibility.

    Your trusted AI software development partner

    Diffco consistently provides cutting-edge digital craftsmanship, blending innovation with precision to elevate your online presence. A history of client success stories highlights our expertise in crafting seamless user experiences and scalable platforms, ensuring your brand thrives in the evolving digital...

    Top Services:

    • AI Development
    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Web Development
    • Show more
    Location
    San Jose, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $110/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    31 Projects Listed

    Diffco Services

    • AI Development
    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Web Development
    • eCommerce Development
    • IoT
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Mars
    • Food Rocket
    • FlashGrid
    • Nokia
    • Instreamatic
    • Quire
    • Legionfarm
    • Latoken
    • Genius One
    • Shift
    Data sourced from the agency's DesignRush profile

    Diffco Reviews & Testimonials

    • Oleg Sotnikov
      Oleg Sotnikov CEO at AppMaster
      5.0 ★

      AI Development Review from Oleg Sotnikov

      Diffco built a complex, production-grade AI agentic system and backend for our client's fintech platform owning architecture, AI/ML components, and AI agents in a security- and compliance-sensitive environment. They delivered on time and within budget, communicated proactively, and operated like part of our own team, taking ownership and suggesting better solutions throughout. Deep AI/ML and senior backend expertise. We'd happily work with them again.

    • Julia Platova
      Julia Platova VP Strategic Partnerships at OVA Solutions
      5.0 ★

      Mobile App Development Review from Julia Platova

      We partnered with Diffco for a comprehensive software development project aimed at delivering a mobile application and backend system for our client. The goal was to create a seamless, secure, and scalable solution within a 4-month timeline and $50k-$200k budget. Diffcos team was highly professional from start to finish. They handled everything: UI/UX design, backend architecture, API integration, and deployment. After the launch, they continued to support us with maintenance and performance optimization. The application received positive feedback and has proven stable and scalable. Were highly satisfied with Diffcos expertise, commitment, and ability to deliver real results.

    • Max Shmatkov
      Max Shmatkov Manager at Centerligh
      5.0 ★

      Mobile App Development Review from Max Shmatkov

      As an advantage of working with this company I’d like to note that their Agile development method is amazing! Diffco earned my trust through such approach and the team’s professional attitude.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    5.0 5.0 (33)
    5.0 5.0 (24)

  • Quartz Digital Agency

    Empower Your Business Online.

    At Quartz Digital Agency, we don't just build websites -- we craft digital experiences that drive results. As a full-service web development and digital marketing firm, we specialize in Web Design, Development, Maintenance/Management, SEO, Social Media, Digital Ads, and IT services...

    Top Services:

    • WordPress Website Design
    • Web Development
    • eCommerce Development
    • Web Design
    • UI/UX Design
    • Show more
    Location
    Woodland, California
    Number of Employees
    Under 49
    Portfolios Count
    12 Projects Listed

    Quartz Digital Agency Services

    • WordPress Website Design
    • Web Development
    • eCommerce Development
    • Web Design
    • UI/UX Design
    • SEO
    • Social Media Marketing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Easy Glass Co.
    • Be Rite DME
    • Innovantedge, Inc.
    • The Detailed Cleaner
    • Level Up Lock
    • Touch Play Learn
    • REA Learning
    • G Jewelry Co.
    • Master Custom Painting, Inc.
    • ArtDeck, Inc.
    Data sourced from the agency's DesignRush profile

    Quartz Digital Agency Reviews & Testimonials

    • Natalie Klein
      Natalie Klein Owner at Touch Play Learn
      5.0 ★

      Web Development Review from Natalie Klein

      Gil really helped me with my website for my business Touch Play Learn. I am so so happy with my website; everything from the look to the layout and feel of my site. Just perfect. Gil is always available if I need any help (even though website was completed months ago). He really cares about his clients and I highly highly recommend him.

    • Ben Klein
      Ben Klein President at Innovantedge Inc
      5.0 ★

      Web Development Review from Ben Klein

      Gil is an exceptional web developer and problem solver. There isn't a question of if he can help, moreso how. He always always goes the extra mile to ensure we are happy with the work. I often recommend Gil to my clients and he always makes me look good in doing so. Whether you need a wordpress site for a service or Shopify for an ecom product (we've done both with Gil) you are in good hands here!

    • Jordan Knowles
      Jordan Knowles President at Tapaholic
      5.0 ★

      Web Design Review from Jordan Knowles

      Gil was the lead on building the website for my small business. He was very attentive, and communicative in figuring out what my style is, and talented enough to see it through. Very happy with the end product!

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.7 4.7 (4)

  • NetSet Software Solutions

    AI-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

    NetSet Software Solutions Services

    • Blockchain
    • AI Development
    • Mobile App Development
    • Software Development
    • Web Design
    • Web Development
    • Staff Augmentation
    • eCommerce Development
    • WordPress Website Design
    • IoT
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Riskcare
    • BetFolio
    • EFX Inc.
    • BotFather
    • AI Health Assistant
    Data sourced from the agency's DesignRush profile

    NetSet Software Solutions Reviews & Testimonials

    • Kowshik Mullapudi IT Analyst at Techdoquest
      4.7 ★

      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.

    • Rakesh Thakkar
      Rakesh Thakkar Executive Vice President of Fooda at Fooda
      4.5 ★

      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.

    • Mark Trudeau
      Mark Trudeau VP, Sales | Executive Leader | Building High-Performing Teams at FloWater
      4.0 ★

      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 Reviews
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    4.6 4.6 (8)
    4.0 4.0 (258)

  • JetRuby

    AI-Enabled Đ¡ustom Software Development

    We're JetRuby — AI-native, award-winning, and ISO-certified agency that's been shipping software since 2010. Our 250+ engineers turn bold ideas into production-ready products, starting from budgets of $50,000 and scaling all the way to enterprise roll-outs...

    Top Services:

    • Web Development
    • Software Development
    • Mobile App Development
    • Web Design
    • AI Development
    • Show more
    Location
    San Francisco, California
    Number of Employees
    250 - 499
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    33 Projects Listed

    JetRuby Services

    • Web Development
    • Software Development
    • Mobile App Development
    • Web Design
    • AI Development
    • IoT
    • IT Services
    • Staff Augmentation
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Financial Times
    • Universum Global
    • Linksquares
    • Sortly
    • NameCoach
    • Anova
    • Osram
    • BackBase
    • Glowforge
    • CampusOptics
    Data sourced from the agency's DesignRush profile

    JetRuby Reviews & Testimonials

    • Artur OzieraÅ„ski
      Artur Ozierański Chief Executive Officer at Holdapp
      5.0 ★

      Mobile App Development Review from Artur Ozierański

      JetRuby provided staff augmentation services for us. developed a mobile app for a design platform. The team was responsible for implementing the backend server and admin panel, and frontend code. The team was made up of experienced developers that have great communication skills, which made resolving any issues or questions a breeze. JetRuby developers kept up-to-date with the latest technologies and trends in development and suggested updates and improvements to the application as needed.

    • Patrice Archer
      Patrice Archer Founder & CEO at Appy Ventures
      5.0 ★

      Web Design Review from Patrice Archer

      They developed a SaaS web platform with smart scheduling and automation tools for us at and built the platform's front- and backend and integrated a custom analytics dashboard and calendar integrations. But to be honest what impressed us most was how deeply they engaged with our vision. They didn't just write code they challenged assumptions, proposed better workflows, and contributed as if they were part of our internal product team. Their ability to think strategically and focus on user experience made them feel more like tech partners than a typical outsourced vendor.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.5 4.5 (2)

  • Sidebench

    Top Healthcare Product, Technology, & Venture Design Firm

    Sidebench is the top healthcare technology design and software engineering firm in the US. We combine strategy, design, technical architecture at every point of our process. We are known for delivering extraordinary business results...

    Top Services:

    • Mobile App Development
    • Software Development
    • AI Development
    • Wearables
    • UI/UX Design
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    Under 49
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    11 Projects Listed

    Sidebench Services

    • Mobile App Development
    • Software Development
    • AI Development
    • Wearables
    • UI/UX Design
    • Web Development
    • Product Design
    • CRM Consulting
    • Cybersecurity
    • Software Testing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • American Heart Association
    • Children's Hospital Los Angeles (CHLA)
    • Hoag Hospital
    • Cortica
    • A16Z (Andreessen Horowitz)
    • Lightspeed Venture Partners
    • Microsoft
    • Rud Bull
    • HP
    • Sony
    Data sourced from the agency's DesignRush profile

    Sidebench Reviews & Testimonials

    • Abhit
      Abhit Undisclosed at Undisclosed
      4.5 ★

      Translation Services Review from Abhit

      They provide consulting services for a healthcare service provider. Sidebench contributed their expertise to a comprehensive mobile application to make sure it would pass Apple Store requirements. Thanks to Sidebench`s input, the application launched on the Apple Store after the first submission. Sidebench`s response times were quick, and they were willing to accommodate a unique working arrangement. The relationship that we had was probably unique; most companies would push to do the development themselves. We only needed Sidebench`s know-how, and they were willing to accommodate us.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.0 4.0 (1)

  • 95Visual

    Scaling Businesses Through Result-Driven Marketing Solutions

    95Visual is a boutique digital marketing and web development agency founded in 2008 and headquartered in Santa Clarita, California, with additional offices in Los Angeles and surrounding SoCal regions. The small in-house team of web and marketing specialists supports small to mid-sized businesses...

    Top Services:

    • Web Design
    • Web Development
    • Digital Marketing
    • Social Media Marketing
    • Branding
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    4 Projects Listed

    95Visual Services

    • Web Design
    • Web Development
    • Digital Marketing
    • Social Media Marketing
    • Branding
    • Content Marketing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • UCSB
    • Sand Canyon Country Club
    • RC Becker and Son
    Data sourced from the agency's DesignRush profile
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  • Carmatec

    Web Design and Mobile App Development Company

    Carmatec is an enterprise IT solutions provider with over 23+ years of proven industry experience and has successfully carved out a niche in web development, software and application design and development apart from its expertise in mobile development, managed IT services & cloud solutions...

    Top Services:

    • Web Development
    • Web Design
    • Mobile App Development
    • Software Development
    • eCommerce Development
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    3 Projects Listed

    Carmatec Services

    • Web Development
    • Web Design
    • Mobile App Development
    • Software Development
    • eCommerce Development
    • AI Development
    • Cloud Consulting
    • Big Data Analytics
    • IoT
    • WordPress Website Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Designs for Health
    • Interserver.net
    • InmateAid
    • QOL Labs
    • Qatar Insurance Company
    • DohaSooq
    • Ditto TV
    • Jaguar PC
    • Qoyod
    • Netrouting
    Data sourced from the agency's DesignRush profile

    Carmatec Reviews & Testimonials

    • Chaithra R
      Chaithra R Review from Google
      5.0 ★

      Chaithra R's Review Sourced from Google

      I have been associated with Carmatec for around three years, and my experience has been positive and growth-oriented. I had the opportunity to work on real-world projects using technologies like MongoDB, Express.js, React, Node.js, and Next.js, which helped improve my technical skills significantly. I also gained practical exposure to deployment, API integration, debugging, and collaborative development workflows. The supportive team environment and continuous learning opportunities made the experience professionally rewarding.

    • janki bhatti
      janki bhatti Review from Google
      1.0 ★

      janki bhatti's Review Sourced from Google

      Very disappointed. I have not receive the salary after leaving the job also not receive the salary

    • Ritika Singh
      Ritika Singh Review from Google
      5.0 ★

      Ritika Singh's Review Sourced from Google

      Highly recommended for mobile app development in Bangalore. Good communication, skilled developers, and reliable support throughout the project.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    3.4 3.4 (109)

  • Jelvix

    GLOBAL TECH PARTNER FOR DIGITAL TRANSFORMATION AND SOFTWARE INNOVATION

    Jelvix is a global tech partner with 15+ years of experience, empowering industry leaders and startups. With 450+ IT experts, we drive digital transformation across Europe, North America, Nordics, and Southeast Asia...

    Top Services:

    • Software Development
    • Mobile App Development
    • VR/AR
    • AI Development
    • IoT
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    500 - 999
    Average Hourly Rate
    $70/hr
    Portfolios Count
    10 Projects Listed

    Jelvix Services

    • Software Development
    • Mobile App Development
    • VR/AR
    • AI Development
    • IoT
    • Software Testing
    • Big Data Analytics
    • IT Services
    • UI/UX Design
    • CRM Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • IKEA
    • Auchan
    • Zeiss
    • Stihl
    • Canon
    Data sourced from the agency's DesignRush profile
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  • Vix Media Group

    Scale Your Business Faster

    Vix Media Group empowers businesses by providing expert guidance for organic growth. Our team of industry professionals collaborates to deliver impactful, results-driven campaigns. We build meaningful partnerships, focusing on our clients unique goals to drive significant outcomes...

    Top Services:

    • SEO
    • Media Buying
    • PPC
    • Digital Services
    • Digital Marketing
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $10,000 - $25,000

    Vix Media Group Services

    • SEO
    • Media Buying
    • PPC
    • Digital Services
    • Digital Marketing
    • Content Marketing
    • Reputation Management
    • Web Design
    • Web Development
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Luxury Rug Brand (started from 0 rankings)
    • California Law Firm (w/ Vix for last 2 years)
    • Boutique Rehab Center (started from 0 rankings)
    • Technology Publication (w/ vix for 6/mo)
    • Spanish Law Firm (w/ vix for 1yr+)
    • Medical Cannabis Technology Company
    Data sourced from the agency's DesignRush profile
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    5.0 5.0 (5)

  • Azilen Technologies

    An Enterprise AI Development Company

    Azilen Technologies is a prominent enterprise AI development company that takes pride in delivering exceptional AI, Data, and HRTech solutions to organizations seeking digital transformation...

    Top Services:

    • AI Development
    • Software Development
    • IT Services
    • IoT
    • Cloud Consulting
    • Show more
    Location
    San Francisco, California
    Number of Employees
    250 - 499
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    16 Projects Listed

    Azilen Technologies Services

    • AI Development
    • Software Development
    • IT Services
    • IoT
    • Cloud Consulting
    • Mobile App Development
    • Wearables
    • Big Data Analytics
    • Managed Services
    • Cybersecurity
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • GattiHR
    • MoCA
    • Clearingbid
    • Mindmaze
    • Orbiwise
    • Ukheshe
    • Essentialaero
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • Tech.us, Inc

    Build Better Software.

    Tech.us is an AI software solutions company that provides AI development, mobile applications, cloud consulting, and IT services. We focus on creating secure, scalable, and innovative technologies that support businesses in their digital journey...

    Top Services:

    • AI Development
    • Mobile App Development
    • IT Services
    • Software Testing
    • Cybersecurity
    • Show more
    Location
    San Jose, California
    Number of Employees
    100 - 249
    Minimal Budget
    $10,000 - $25,000

    Tech.us, Inc Services

    • AI Development
    • Mobile App Development
    • IT Services
    • Software Testing
    • Cybersecurity
    • Cloud Consulting
    • Software Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Ivionics
    • OpenGym
    • IDP Consulting
    • Zone
    • Trader PhD, LLC
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

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