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.

United States × California ×
  • Diffco

    VerifiedVerified 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...

    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
  • 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...

    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
  • 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...

    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
  • 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...

    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
  • 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...

    Location
    San Francisco, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    4 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
  • 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...

    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
  • 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...

    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
  • Inform. Persuade. Remind.

    EPRIZ 7 helps restaurants, healthcare providers, furniture stores, startups, local businesses, and small business to medium-sized companies grow through digital advertising, websites, and connected TV advertising. Marketing services in Los Angeles, including SEO, social media, and branding...

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

    EPRIZ 7, LLC Services

    • Digital Marketing
    • Social Media Marketing
    • SEO
    • Advertising
    • PPC
    • Branding
    • Package Design
    • Web Design
    • Web Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Altece Design
    • Amparo's Home Furniture
    • Stereo1
    Data sourced from the agency's DesignRush profile
  • 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...

    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
  • Aiming to enhance the lives of billions of users with innovative technology solutions.

    BestPeers is a top software development company specializing in custom software, website development, UX/UI design, and full-stack solutions. With a focus on quality, innovation, and timely delivery, BestPeers creates consumer-centric tech solutions across diverse industries, ensuring client satisfaction and...

    Location
    California City, California
    Number of Employees
    250 - 499
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $25,000 - $50,000

    Best Peers Services

    • Digital Strategy
    • Web Design
    • eCommerce Development
    • Web Development
    • UI/UX Design
    • WordPress Website Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • S2Infinitum Softech Pvt Ltd
    • Shethink pvt ltd
    • AtmaGo
    Data sourced from the agency's DesignRush profile
  • We Bring The Tech. You Get The Wins.

    Teamvoy is an AI engineering and transformation partner. We help companies make smarter technology decisions and turn them into production-ready software...

    Location
    Covina, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $10,000 - $25,000

    Teamvoy Services

    • Software Development
    • AI Development
    • Design Services
    • Web Design
    • UI/UX Design
    • Web Development
    • WordPress Website Design
    • IT Services
    • Mobile App Development
    • Blockchain
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Nasdaq
    • Panasonic
    • Swisscom
    • Afriland First Bank
    • OSL
    • Velory
    • Neopenda
    • Mitipi
    • Garrison Flood Control
    • Market Access Direct
    Data sourced from the agency's DesignRush profile

    Teamvoy Reviews & Testimonials

    • Саша Кравченко (sashko)
      Саша Кравченко (sashko) Review from Google
      5.0

      Саша Кравченко (sashko)'s Review Sourced from Google

      it feels like you're working in an expensive boutique company with the most cutting-edge projects and leading industry experts

    • Альона Какора
      Альона Какора Review from Google
      5.0

      Альона Какора's Review Sourced from Google

      Teamvoy is a professional company with strong expertise and a team of specialists who truly know their field. The atmosphere within the company is comfortable, open, and friendly, which makes working here enjoyable and productive.

    • Qui Cung
      Qui Cung Review from Google
      5.0

      Qui Cung's Review Sourced from Google

      As a swiss company, we collaborated with teamvoy for the development of our website and application.We are very satisfied by the work done by their team and how the troubleshooted our issues.

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

    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
  • Enhance Your Companys Online Identity.

    OooWee Business Solutions, founded in 2024 and based in Stockton, California, is a boutique digital marketing and software development agency serving small to midsize businesses. The firm delivers full-cycle solutions including account management, SEO, custom web and mobile apps, AI-powered lead generation...

    Location
    Stockton, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    Under $1,000

    OooWee LLC Services

    • Design Services
    • Digital Strategy
    • Web Design
    • Web Development
    • Social Media Marketing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • MyFitnessPal
    • Steam Points
    • Sail Me
    • Lemonade
    • MetaVRse
    • Lodi Bowling Bar and Lounge
    • MOOi Concept Store
    • NOBULL
    • Boostr
    Data sourced from the agency's DesignRush profile
  • 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...

    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
  • Strategy, design, engineering, and AI

    Bay Area Coders is a San Francisco-based product and engineering studio working with venture-backed startups and growth-stage companies since 2016. We combine strategy, design, engineering, and AI to help teams ship real products and modernize existing ones...

    Location
    Roseville, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $1,000 - $10,000

    Bay Area Coders Services

    • Software Development
    • Web Development
    • Mobile App Development
    • AI Development
    • Design Services
    • Staff Augmentation
    • UI/UX Design
    • Web Design
    • WordPress Website Design
    • Graphic Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Iterable
    • Loop Returns
    • Atmosphere TV
    • theChive
    • OXGN
    Data sourced from the agency's DesignRush profile

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