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Best California Staff Augmentation Company Rankings

3 Companies - Rankings updated: August 19, 2026

Every agency featured on DesignRush is vetted for expertise and client satisfaction to support your decision-making. Some listings may be sponsored.

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  • Vention

    Verified Verified by the DesignRush team for authenticity and credibility.

    Engineering peace of mind

    At Vention, unparalleled customer care isnt just a promise its our mission. We blend personalized experience, unwavering attention to detail, and a genuine passion for your business, ensuring that every aspect of our collaboration is tailored to your success...

    Location
    San Francisco, California
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    15 Projects Listed

    Vention Services

    • Software Development
    • Staff Augmentation
    • Mobile App Development
    • Software Testing
    • Web Development
    • Blockchain
    • AI Development
    • Cloud Consulting
    • CRM Consulting
    • Cybersecurity
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • IBM
    • PayPal
    • Cuvva
    • Costa Coffee
    • Memrise
    • Urban
    • Tailored Dog Food Delivery
    • RealVNC
    • Label on a Cable
    • ClassPass
    Data sourced from the agency's DesignRush profile

    Vention Reviews & Testimonials

    • Lee Tupper
      Lee Tupper CTO at Remotiv (formerly Financial Soundings)
      3.8 ★

      Mobile App Development Review from Lee Tupper

      Vention has delivered excellent design prototypes and accurate time estimates. The app is still in beta mode, and the partnership with [...] Vention will [continue] until the release of the next version. Vention is a reliable team that offers quality service. (Verified via email)

    • Jon Wade
      Jon Wade CTO & Founder at Union54
      5.0 ★

      Staff Augmentation Review from Jon Wade

      Vention’s efforts allowed the successful development of the product, resulting in new customers. They provided backend developers, business analysts, UI designers, and QA testers to develop our solution. Vention cultivated a seamless partnership through constant updates and a collaborative approach. Overall, their team’s well-rounded expertise was impressive.

    • AJ Canty
      AJ Canty CTO and Co-Founder at Primer
      5.0 ★

      Web Development Review from AJ Canty

      We’ve been working with Vention for quite some time and consider them an extension of our team, rather than an offshore vendor. We needed solid mobile developers to work with our in-house engineers to build our Primer SDKs on both mobile platforms. This was not a trivial thing as it required a lot of cross-functional communication, but the Vention team was up to the challenge. They quickly adopted the best practices we follow at Primer and proved to be effective and proactive.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.6 4.6 (6)
    4.9 4.9 (19)

  • Rootstrap

    Accelerate Your Roadmap & Drive Innovation

    At Rootstrap, we help companies scale people, processes, and products through outcome-driven development. We’ve helped launch more than 750+ digital products with more than 100 million combined downloads...

    Location
    Los Angeles, California
    Number of Employees
    50 - 99
    Average Hourly Rate
    $87/hr
    Portfolios Count
    8 Projects Listed

    Rootstrap Services

    • Mobile App Development
    • Software Development
    • Web Development
    • AI Development
    • Software Testing
    • Blockchain
    • Web Design
    • Staff Augmentation
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • WalletJoys
    • MasterClass
    • Ownable
    • Generis
    • TONY ROBBINS COACHING EMPIRE
    • Merry Jane
    • Google Opus
    • Globalization Partners
    Data sourced from the agency's DesignRush profile

    Rootstrap Reviews & Testimonials

    • Bridget Garcia
      Bridget Garcia Chief Marketing Officer at Undisclosed
      4.0 ★

      Enterprise Review from Bridget Garcia

      We needed a new website for our business and we knew it was time to update the design and make it more user friendly. Rootstrap helped us create our site with all of the latest technology and they were very flexible in terms of our requests. Award winning work! Kudos.

    • Ori Goldman
      Ori Goldman Co-Founder at Loftey
      5.0 ★

      Web Development Review from Ori Goldman

      When I was looking to build my MVP I spoke to about 10 shops. Little did I know that I would still be working with that same company over 5 years later. Rootstrap built our MVP and we have stuck with them ever since. Through multiple pivots, design changes, thousands of implemented features, we still feel lucky that we found them 5 years ago.

    • Pete Ghiorse
      Pete Ghiorse CEO/Founder at GiveTide
      5.0 ★

      HTML5 Review from Pete Ghiorse

      Rootstrap is the real deal. We've worked with them on our app from day one. From the first napkin sketch through V2 of our app, Rootstrap has been one of the most reliable value-producing companies I've ever worked with.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.7 4.7 (7)
    5.0 5.0 (6)

  • Sketch Development Services

    Verified Verified by the DesignRush team for authenticity and credibility.

    Build it. Run it. Own it.

    We embed development teams to build the right AI-enabled custom software, and equip your team to run it...

    Location
    San Francisco, California
    Number of Employees
    Under 49
    Minimal Budget
    $50,000 & Up

    Sketch Development Services Services

    • Software Development
    • Cloud Consulting
    • UI/UX Design
    • eCommerce Development
    • DevOps Consulting
    • Staff Augmentation
    • AI Development
    • Software Testing
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • U.S. Bank
    • Centene Corporation
    • Maritz
    • Change Healthcare
    • Stifel
    • Reinsurance Group of America (RGA)
    • bioMerieux
    • CareSource
    • CENTEGIX
    • Purina
    Data sourced from the agency's DesignRush profile

    Sketch Development Services Reviews & Testimonials

    • Monica
      Monica Review from Google
      5.0 ★

      Monica's Review Sourced from Google

      Amazing and talented people. I’ve worked for both client and agency side and can can say their partnership is amazing. They truly care about ongoing operations and not just ending it at a project level. Highly recommend! Message me if you want specifics.

    • John Andesilich
      John Andesilich Review from Google
      5.0 ★

      John Andesilich's Review Sourced from Google

      I own a marketing firm in Troy MO and I recently met with Calvin at Sketch Development Services to discuss a software development project I have been thinking about pursuing. He was very nice, easy to speak to and even though his field is a bit out of my knowledge base, he was able to explain things in a way that made perfect sense. I look forward to working with him and his team in the future and recommend anyone looking for a software or app development company to give them a try.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.8 4.8 (8)

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