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

7 Companies - Rankings updated: September 04, 2026

We evaluate every agency on DesignRush according to expertise credentials and client satisfaction ratings. Some placements are sponsored.

Ruby on Rails
Software & IT Services
$25,000 - $50,000
Sort by: Sponsored
United States × California × Ruby on Rails × Software & IT Services × $25,000 - $50,000 × Clear Filters

  • 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)

  • Aristek Systems

    AI is easy. Systems are hard. We build systems.

    AI is easy. Systems are hard. We build systems...

    Top Services:

    • Software Development
    • AI Development
    • Staff Augmentation
    • Cloud Consulting
    • Software Testing
    • Show more
    Location
    Irvine, California
    Number of Employees
    100 - 249
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    20 Projects Listed

    Aristek Systems Services

    • Software Development
    • AI Development
    • Staff Augmentation
    • Cloud Consulting
    • Software Testing
    • Big Data Analytics
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Software& IT Industry
    • Energy Industry
    • Education Industry
    • Entertainment Industry
    • Health Care Industry
    • Transportation & Logistics Industry
    Data sourced from the agency's DesignRush profile

    Aristek Systems Reviews & Testimonials

    • Undisclosed
      Undisclosed CEO at E-Commerce Development Company
      5.0 ★

      Web Development Review from Undisclosed

      Aristek Systems developed, tested, and released a new website for an e-commerce development company. The team utilized Ruby on Rails, Elixir, Phoenix Framework, JavaScript, GraphQL, PostgreSQL, and AWS. Aristek Systems was able to deliver a fully functional software, much to the client's delight. The team was highly communicative, and internal stakeholders were particularly impressed with the vendor's professionalism and attention to detail.

    • Undisclosed
      Undisclosed Product Design Manager at Educational Digital Platform
      5.0 ★

      Web Design Review from Undisclosed

      Aristek Systems has redesigned the UI/UX of an existing educational digital platform. The team has refreshed the interface and added new features to deliver a more comprehensive experience for users. The client is satisfied with Aristek Systems' work and performance. The team delivers within the specified timeframe and manages the project seamlessly. Moreover, they stand out for their availability, problem-solving capabilities, and amazing work culture; they're easy to work with.

    • Anonymous
      Anonymous CTO at Business Consulting Company
      5.0 ★

      Software Development Review from Anonymous

      I had the privilege of working with Ruslan and his team at Aristek for the past three years. It is hard to find that level of dedication in an offshore vendor/partner but Ruslan and the Aristek team deliver it. I would highly recommend Ruslan and Aristek to anyone needing an expert level partner in EdTech and SaaS platform development.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.8 4.8 (6)

  • Folio3

    Driven by Innovation

    The best eCommerce development company empowering you with the tools you need to conquer your industry...

    Top Services:

    • Wearables
    • VR/AR
    • Mobile App Development
    • Software Development
    • eCommerce Development
    • Show more
    Location
    Pleasanton, California
    Number of Employees
    250 - 499
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    11 Projects Listed

    Folio3 Services

    • Wearables
    • VR/AR
    • Mobile App Development
    • Software Development
    • eCommerce Development
    • IoT
    • Web Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Lioher - Magento B2B Solution
    • TJM
    • Flexiglass
    • Trilink
    • Colgate-Palmolive
    • Standard Chartered
    • Zoetis
    • Mercedez Benz
    • Barnes and Noble
    • Merck
    Data sourced from the agency's DesignRush profile

    Folio3 Reviews & Testimonials

    • Irshad
      Irshad Customer Account Executive at Fairsquare UK
      5.0 ★

      Web Development Review from Irshad

      I am very happy about how Folio3 gives 100% in the work dedication and has a very organized and energetic team who thrive with innovative ideas for our business. We are still using Folio3 on a regular basis and also get excellent updates from any usage left so that we can utilize our monthly allowance which is great teamwork.

    • Mike Do
      Mike Do CTO at Barnes & Noble
      5.0 ★

      Web Development Review from Mike Do

      Whether it’s a new development, update or maintenance – Folio3 always shines through. Their turnaround time is always stellar, it’s a pleasure to work with them.

    • Stewart Kelly
      Stewart Kelly Founder & CTO at SideStep
      5.0 ★

      Software Development Review from Stewart Kelly

      They have helped us manage and execute the bulk of the engineering work necessary for integrating with our partners in the Airline, Car and Hotel verticals.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.6 4.6 (3)

  • ArkusNexus

    Accelerating Progress Through Technology

    We can extend your team, expand your products and innovate your current technology...

    Top Services:

    • Web Development
    • Software Development
    • eCommerce Development
    • UI/UX Design
    • Mobile App Development
    • Show more
    Location
    San Diego, California
    Number of Employees
    500 - 999
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    2 Projects Listed

    ArkusNexus Services

    • Web Development
    • Software Development
    • eCommerce Development
    • UI/UX Design
    • Mobile App Development
    • AI Development
    • Product Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Figo Pet Insurance
    • Playboy
    • Catalytic Risk
    • Advanta
    • Healthcare.com
    Data sourced from the agency's DesignRush profile

    ArkusNexus Reviews & Testimonials

    • Jesus Romero
      Jesus Romero Review from Google
      1.0 ★

      Jesus Romero's Review Sourced from Google

      it's a hiring scam, i never applied here and had someone reach out with an interview request

    • Cody McGrady
      Cody McGrady Review from Google
      1.0 ★

      Cody McGrady's Review Sourced from Google

      This company is illegitimate. Someone close to me was offered a job without an interview, and there have been numerous red flags. They sent a fake check (from a closed bank account and signed by “Long Live”) to buy needed materials for the job. Luckily we were smart enough not to provide any information or click on any email links. Stay away! I have tried numerous times to make contact with someone legitimate in the company but haven’t heard anything.

    • Monserrat Gutierrez
      Monserrat Gutierrez Review from Google
      5.0 ★

      Monserrat Gutierrez's Review Sourced from Google

      Been working here for two years, It has its ups and downs but everyone always tries to keep a good environment.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.3 4.3 (14)

  • InfinixSoft

    Trusted by Leading Brands

    We work with startups and enterprise clients to create amazing mobile apps that users love, across iPhone, iPad, Android and the Web...

    Top Services:

    • Mobile App Development
    • Web Design
    • Web Development
    • UI/UX Design
    • IoT
    • Show more
    Location
    Los Angeles, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    2 Projects Listed

    InfinixSoft Services

    • Mobile App Development
    • Web Design
    • Web Development
    • UI/UX Design
    • IoT
    • Software Development
    • Blockchain
    • IT Services
    • Product Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Udely.com
    • bubblesu.com
    • pezo.land
    Data sourced from the agency's DesignRush profile
    Visit Website View Profile

  • Kwanso

    Innovating One Product at a Time!

    Kwanso, recognized as a top 5 mobile company by Silicon Review, is a team of expert designers, developers, machine learning engineers, and consultants dedicated to building exceptional digital experiences...

    Top Services:

    • Software Development
    • Mobile App Development
    • AI Development
    • eCommerce Development
    • Show more
    Location
    San Francisco, California
    Number of Employees
    Under 49
    Average Hourly Rate
    $40/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    5 Projects Listed

    Kwanso Services

    • Software Development
    • Mobile App Development
    • AI Development
    • eCommerce Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Whirlpool
    • Craftsman
    • Gladiator
    • Kenmore
    • RealREPP
    • TrueReview
    • College Advisor
    • BioMarker
    • Uptok
    • Bushnell
    Data sourced from the agency's DesignRush profile

    Kwanso Reviews & Testimonials

    • Full Circle Healthcare Solutions
      Full Circle Healthcare Solutions Review from Google
      1.0 ★

      Full Circle Healthcare Solutions's Review Sourced from Google

      Although I have responded to be removed from this person‘s spamming emails, they still continue to email me over and over again. This is borderline rude and an excusable since I have responded to those emails to be opted out. Regardless of the business the way that you represent it is not how I do business. Normally I don’t leave responses but after three or four times of receiving the same emails when requesting to be opted out I figured this was the best place to post.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.0 4.0 (4)

  • Best Peers

    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...

    Top Services:

    • Digital Strategy
    • Web Design
    • eCommerce Development
    • Web Development
    • UI/UX Design
    • Show more
    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
    Visit Website View Profile

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