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Best Illinois Engineering Design Firms

3 Companies - Rankings updated: September 03, 2026

DesignRush vets all agencies based on professional qualifications and verified customer feedback to help you choose confidently. Some featured agencies maintain paid sponsorships.

Engineering Design
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United States × Illinois × Engineering Design × Finance × Clear Filters

  • DD.NYC®

    Verified Verified by the DesignRush team for authenticity and credibility. AI Leader Recognized for strong visibility across AI-powered search and answer engines.

    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...

    Top Services:

    • Web Design
    • Branding
    • UI/UX Design
    • Package Design
    • eCommerce Development
    • Show more
    Location
    Chicago, Illinois
    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
    Visit Website View Profile
    4.8 4.8 (6)
    4.8 4.8 (89)

  • LLT Group

    Award Winning Design + Development Agency

    We’re a digital, branding, and marketing agency that creates authentic partnerships by elevating the human experience. Every story we craft, every experience we build, every campaign we deploy, every relationship made - we make sure it is set up for success...

    Top Services:

    • Web Design
    • Web Development
    • eCommerce Development
    • SEO
    • Graphic Design
    • Show more
    Location
    Naperville, Illinois
    Number of Employees
    Under 49
    Average Hourly Rate
    $149/hr
    Minimal Budget
    $25,000 - $50,000

    LLT Group Services

    • Web Design
    • Web Development
    • eCommerce Development
    • SEO
    • Graphic Design
    • Branding
    • Design Services
    • Logo Design
    • WordPress Website Design
    • UI/UX Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • IT Industry
    • Small Business Industry
    • Commercial Industry
    Data sourced from the agency's DesignRush profile

    LLT Group Reviews & Testimonials

    • Kennan Davison
      Kennan Davison CEO, Founder at Icon
      5.0 ★

      Web Design Review from Kennan Davison

      Thanks to LLT Group efforts, we saw a 300% increase in web traffic and improvement on our conversion rate. The team ensured a seamless customer experience by delivering high-quality and timely outputs that exceeded our expectations. They were also talented, professional, and collaborative.

    • Dustin Bohannan
      Dustin Bohannan Business Development Manager at SCOTHE
      5.0 ★

      Web Design Review from Dustin Bohannan

      LLT Group was tasked with redesigning the full website to improve the user journey and elevate the brand aesthetic. they worked on penetration testing reporting company's website. We provided the copy and gave examples of web pages we like. We asked for all custom illustrations. We also needed some help with web development. The team delivered work on time and was responsive via email and virtual meetings, exhibiting excellent project management.

    • Brendan Murphy
      Brendan Murphy CEO at Access Telehealth
      5.0 ★

      Web Design Review from Brendan Murphy

      Llt group designed and developed a website for a recruitment firm. The team was responsible for web design, UI/UX design, frontend development, and backend development. they were communicative and open to feedback throughout the project, fixing errors and making design changes as needed. Still, the project was delayed a couple of weeks, as Llt' team was a bit slow at implementing those changes. The dedication to their work was outstanding.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.9 4.9 (27)
    4.5 4.5 (54)

  • ELEKS

    Verified Verified by the DesignRush team for authenticity and credibility.

    ELEKS, a trusted partner for guaranteed software engineering excellence, quality, and transparency.

    ELEKS is the partner of choice for many leading enterprises, SMEs and technology challengers. We help businesses elevate their value through custom software development, product design, QA and consultancy services. ELEKS is a trusted partner for guaranteed software engineering excellence...

    Top Services:

    • Software Development
    • Mobile App Development
    • Cloud Consulting
    • Cybersecurity
    • AI Development
    • Show more
    Location
    Chicago, Illinois
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $25,000 - $50,000
    Portfolios Count
    12 Projects Listed

    ELEKS Services

    • Software Development
    • Mobile App Development
    • Cloud Consulting
    • Cybersecurity
    • AI Development
    • ERP Consulting
    • CRM Consulting
    • Product Design
    • Big Data Analytics
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Aramex
    • TAIT
    • Acino
    • GRTGaz
    • Autodesk
    • Blackboard
    • Havas
    • ESET
    • Eagle
    • teleologica
    Data sourced from the agency's DesignRush profile

    ELEKS Reviews & Testimonials

    • John Armstrong
      John Armstrong Founder, CEO & CTO at Civex
      5.0 ★

      Software Development Review from John Armstrong

      ELEKS was able to take our vision and help us deliver an app that empowers retail shareholders to make their voices heard. They’ve brought a depth and breadth of technical expertise and user experience design to challenge us on our assumptions on how people would want to interact with the app. From a mobile development perspective, we wanted to go to market with both an Android and an iPhone simultaneously.

    • Mark Battcock
      Mark Battcock Digital Communication Director at Imerys
      5.0 ★

      Software Development Review from Mark Battcock

      We are very happy with our ELEKS partnership; the dedication of the team is exceptional. We would certainly recommend ELEKS and would be happy to work with them again. In fact, they continue to be our partner for the 2nd phase of the CDX project to add even more customer services to the website.

    • Huntly Christie
      Huntly Christie CEO at Christie Lites
      5.0 ★

      Software Development Review from Huntly Christie

      What impressed me about ELEKS is the culture. There is a very strong culture of discipline and performance, and software is a profession where discipline is very important. Good software development can only happen with a strong work ethic, and I think the ELEKS team really understands that.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
    Visit Website View Profile
    4.9 4.9 (22)
    5.0 5.0 (1)

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