Discover the best software companies in Missouri that can develop custom software or/and customize existing solutions as well as provide other specialized software services. Our experts ranked them by their rates, reviews, size and expertise to help you choose a partner suited for your budget and requirements easily.

Best Missouri Software Development Firm Rankings

8 Companies - Rankings updated: September 03, 2026

Each agency undergoes DesignRush evaluation for professional expertise and genuine client satisfaction to assist your search. Some featured placements are paid.

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  • Accenture

    World Famous IT Services for Businesses

    Accenture is a renowned worldwide IT services company that excels in digital, cloud, and security solutions. With an extensive range of expertise across over 40 industries, we provide a comprehensive suite of services including Strategy and Consulting, Outsourcing, Interactive, Technology, IoT, and...

    Top Services:

    • Software Development
    • Cybersecurity
    • IT Services
    • IoT
    • Big Data Analytics
    • Show more
    Location
    St. Louis, Missouri
    Number of Employees
    1000 & Up
    Portfolios Count
    4 Projects Listed

    Accenture Services

    • Software Development
    • Cybersecurity
    • IT Services
    • IoT
    • Big Data Analytics
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Education Non-profit
    • Healthcare Firm
    • Global Apparel Retailer
    Data sourced from the agency's DesignRush profile

    Accenture Reviews & Testimonials

    • Saurabh Choudhary
      Saurabh Choudhary Senior Consultant at LTI
      4.0 ★

      Financial Review from Saurabh Choudhary

      In my experience it's a good place to work and start your career with, you will get to learn a lot of things which will be quite beneficial in long run.Accenture helps clients across various industries innovate and transform their businesses. Their focus on digital technologies, such as AI, cloud, and analytics, enables them to deliver impactful solutions. Overall, Accenture's commitment to innovation and client success makes them a leading player in the consulting industry.

    • Rishi Kumar
      Rishi Kumar Sr. Servicemax and Salesforce Developer at Boston Scientific
      4.7 ★

      Salesforce Review from Rishi Kumar

      I had the opportunity to work with Accenture on implementing Salesforce with ServiceMax. Their expertise and dedication were impressive. Accenture's work on implementing Salesforce and the ServiceMax managed package was invaluable, significantly benefiting our organization's operations and efficiency. However, one area for improvement would be the documentation process. It was challenging to access comprehensive documentation, which slowed down certain aspects of our project. Nonetheless, I recommend Accenture as their talented team delivers exceptional results.

    • William Lewis
      William Lewis Review from Google
      5.0 ★

      William Lewis's Review Sourced from Google

      ISSA monthly meeting. Great venue. Good location. Extraordinary buffet at meeting. Interesting discussions. Accenture goes the mile to support our meetings and I always enjoy working with their team. By the way the view of LA is incredible.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.1 4.1 (2)
    4.9 4.9 (18)

  • Softellar

    Custom Software Development & IT Staff Augmentation Company

    We specialize in leveraging the latest technologies and industry best practices to drive business growth and foster innovation...

    Top Services:

    • Staff Augmentation
    • Cloud Consulting
    • Software Development
    • Mobile App Development
    • Software Testing
    • Show more
    Location
    New York, Missouri
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $10,000 - $25,000

    Softellar Services

    • Staff Augmentation
    • Cloud Consulting
    • Software Development
    • Mobile App Development
    • Software Testing
    • Web Development
    • UI/UX Design
    • Web Design
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Multi Radiance Medical
    • Lomalux Laboratories
    • Grand Auto
    • Commercial Capital Group
    • WellWu
    Data sourced from the agency's DesignRush profile

    Softellar Reviews & Testimonials

    • Kerry Cooper
      Kerry Cooper Senior Vice President of Medical Affairs at Vera Therapeutics
      5.0 ★

      Software Development Review from Kerry Cooper

      We partnered with Softellar to modernize our patient records management system and improve overall healthcare delivery, and the results have been outstanding. The project was essential for us, especially during the pandemic, when remote care became a necessity. Softellar's team developed a comprehensive healthcare solution that seamlessly integrated a central patient records management system, telemedicine capabilities, remote health monitoring features, and full regulatory compliance. Their deep understanding of our unique needs and workflows allowed them to customize the solution effectively, creating a user-friendly system that reduced delays and significantly improved patient care. The telemedicine functionality ensured uninterrupted care during the pandemic, while remote health monitoring provided us with valuable insights into patient conditions, enabling proactive interventions. What impressed us most was Softellars flexibility and responsiveness. They delivered the project on time, made adjustments when needed, and ensured the system worked perfectly with our existing infrastructure. Their attention to detail and commitment to user experience made the system easy to adopt with minimal training for our staff.

    • Ariel Elkayam
      Ariel Elkayam VP, Head of Product at LoanStreet Inc.
      5.0 ★

      Staff Augmentation Review from Ariel Elkayam

      Softellar has been a game-changer for LoanStreet, providing exceptional IT Staff Augmentation that seamlessly integrated with our team. They invested time in understanding our platforms needs, demonstrating a deep grasp of our technical and business objectives. Their engineers were not only highly skilled but proactive problem solvers, helping us tackle challenges in real-time data tracking and loan portfolio performance. They also proved remarkably adaptable, adjusting to regulatory-driven priority shifts without sacrificing quality or efficiency. One standout project involved enhancing our platforms user experience for credit unions, banks, and lenders. Softellar's team went beyond mere implementation by offering valuable feedback on design and usability, significantly improving client engagement and satisfaction. They also provided comprehensive post-project support and knowledge transfer, empowering our team to manage and scale independently.

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

  • Tecziq Solutions

    Strategy, Innovation, Growth

    Technology partners in the development and implementation of automated solutions on mobile and web platforms leading to digital transformation and sustainable growth...

    Top Services:

    • Web Development
    • eCommerce Development
    • Software Development
    • Mobile App Development
    • Big Data Analytics
    • Show more
    Location
    St. Louis, Missouri
    Number of Employees
    Under 49
    Average Hourly Rate
    $25/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed

    Tecziq Solutions Services

    • Web Development
    • eCommerce Development
    • Software Development
    • Mobile App Development
    • Big Data Analytics
    • Staff Augmentation
    • AI Development
    • WordPress Website Design
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • GBiosciences
    • micehellenails
    • Nailfor
    • SmithAnalytical
    • IBoomerang
    • USABG
    • Apexhuman
    • Vallar
    • Vanloc
    • 123Clinic
    Data sourced from the agency's DesignRush profile

    Tecziq Solutions Reviews & Testimonials

    • Tashfeen Khan
      Tashfeen Khan Marketing manager at T7Gaming
      5.0 ★

      Software Development Review from Tashfeen Khan

      We had to get an online social gambling application to be developed and after looking into the market we shortlisted Tecziq Solutions. The best part was there prior knowledge of our industry domain which was very helpful. They have a nice team and very co-operative and flexible. We found them to be very professional and top notch in terms of communication as well - quite prompt. We loved working with them and they are with us our technical partners.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.3 4.3 (1)

  • StrategiCom

    Better Technology, Better Pricing, Better Support

    Medical clinics, regional banks, and organizations of all kinds rely on StrategiCom for vendor-neutral advisory to modernize their telecommunications and technology stack. Whether you need to upgrade your phone system/PBX to unified communications as a service (UCaaS) or call center as a service (CCaaS)...

    Top Services:

    • Software Development
    Location
    O'Fallon, Missouri
    Number of Employees
    50 - 99
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $1,000 - $10,000

    StrategiCom Services

    • Software Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Finance Industry
    • Manufacturing Industry
    • Health Care Industry
    Data sourced from the agency's DesignRush profile

    StrategiCom Reviews & Testimonials

    • Chris Gloeckner
      Chris Gloeckner Review from Google
      5.0 ★

      Chris Gloeckner's Review Sourced from Google

      I love working with the guys over at Strategicom. They are very responsive and make my job easier.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    5.0 5.0 (1)

  • Grant Thornton

    IT, Business, BPO, Audit, Tax and Advisory are just the beginning.

    Grant Thornton LLP (US) is an IT, project management, audit, tax, AgTech, and BPO company headquartered in Chicago, Illinois with over 50 U.S. offices and access to a global network or member firms in over 135 countries. We offer a broad range of services in strategy and consulting, operations, technology and...

    Top Services:

    • Accounting
    • Business Consulting
    • Market Research
    • HR Outsourcing
    • Software Development
    • Show more
    Location
    Kansas City, Missouri
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $35/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    2 Projects Listed

    Grant Thornton Services

    • Accounting
    • Business Consulting
    • Market Research
    • HR Outsourcing
    • Software Development
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Financial industry
    • Real estate industry
    • Media and Entertainment industry
    Data sourced from the agency's DesignRush profile

    Grant Thornton Reviews & Testimonials

    • Theodore Mall
      Theodore Mall Review from Google
      4.0 ★

      Theodore Mall's Review Sourced from Google

      One of the world’s leading organizations of independent audit, tax and advisory firms. Grant Thornton has revenues in excess of $1.9 billion and operates more than 50 offices.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.5 4.5 (13)

  • Classy Llama

    Crafting Digital Commerce Where Innovation Meets Integrity

    Classy Llama Studios is a full-service eCommerce and digital-commerce agency specializing in building, optimizing, and scaling online stores. With deep technical expertise and a client-first approach, we deliver custom web development, commerce solutions, integrations, and marketing all aimed at growing your...

    Top Services:

    • eCommerce Development
    • ERP Consulting
    • Big Data Analytics
    • Software Development
    • CRM Consulting
    • Show more
    Location
    Springfield, Missouri
    Number of Employees
    100 - 249

    Classy Llama Services

    • eCommerce Development
    • ERP Consulting
    • Big Data Analytics
    • Software Development
    • CRM Consulting
    • Digital Marketing
    • SEO
    • PPC
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Agriculture Industry
    • Automotive Industry
    • Manufacturing Industry
    Data sourced from the agency's DesignRush profile

    Classy Llama Reviews & Testimonials

    • Reliability Concepts
      Reliability Concepts Review from Google
      5.0 ★

      Reliability Concepts's Review Sourced from Google

      Chandler, Ben, Michael and the entire team at Classy Llama were great to work with. Not only did they build us a great, modern-looking ecommerce website but they provided, and continue to provide, incredible service and support. We would highly recommend.

    • Webman - shopify development
      Webman - shopify development Review from Google
      5.0 ★

      Webman - shopify development's Review Sourced from Google

      Classy Llama did an excellent job with our Shopify store. The team was professional, easy to work with, and very knowledgeable. They understood our needs clearly and delivered a store that looks great and works perfectly. Communication was smooth throughout the project, and they made the whole process simple and stress-free. Highly recommend their Shopify expertise!

    • Robert Beaman
      Robert Beaman Review from Google
      5.0 ★

      Robert Beaman's Review Sourced from Google

      We have been working with Classy Llama since 2020 and have been very impressed with their technical expertise with our Adobe Magento websites. Very professional, easy to work with and extremely competent.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.9 4.9 (24)

  • Crowe

    Empowering Your Accounting Decisions.

    Crowe LLP is a global accounting firm offering audit, tax, advisory, and consulting services. With deep industry expertise, we empower businesses to make informed decisions for lasting value. Recognized as a top workplace, we leverage our partnership with Crowe Global to provide comprehensive solutions...

    Top Services:

    • Accounting
    • HR Outsourcing
    • Business Consulting
    • Market Research
    • BPO
    • Show more
    Location
    Clayton, Missouri
    Number of Employees
    1000 & Up

    Crowe Services

    • Accounting
    • HR Outsourcing
    • Business Consulting
    • Market Research
    • BPO
    • Software Development
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Banking Industry
    • Food Industry
    • Fintech Industry
    Data sourced from the agency's DesignRush profile

    Crowe Reviews & Testimonials

    • RA
      RA Review from Google
      1.0 ★

      RA's Review Sourced from Google

      As an accounting firm I would give them 1 star. I recently discovered a litany of deductions they failed to consider. You will be given an EA, which is just a glorified tax preparer. They will know nothing and be slow to reply. You might as well get your taxes done by H&R block or a proper independent CPA. If these folks do your taxes, get prepared for a larger tax bill. I strongly advise against it.

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    2.6 2.6 (5)

  • Perficient

    Experience, expertise, speed, agility, and a dose of pragmatism to drive your business forward!

    We help you imagine, create, engineer and run digital solutions that transform how you connect with your customers and grow your business. Through our digital consulting services, we partner with you to iterate and build digital solutions that bring you faster speed-to-market capabilities and stronger...

    Top Services:

    • Managed Services
    • DevOps Consulting
    • Big Data Analytics
    • IT Services
    • Cybersecurity
    • Show more
    Location
    St. Louis, Missouri
    Number of Employees
    1000 & Up

    Perficient Services

    • Managed Services
    • DevOps Consulting
    • Big Data Analytics
    • IT Services
    • Cybersecurity
    • Software Development
    • AI Development
    • Digital Marketing
    • SEO
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Esurance
    • Henry Ford Health System
    • Herbalife Nutrition
    • The Park at Wrigley
    • Stallion
    Data sourced from the agency's DesignRush profile

    Perficient Reviews & Testimonials

    • Rutledge Daugette
      Rutledge Daugette Review from Google
      1.0 ★

      Rutledge Daugette's Review Sourced from Google

      We had a great initial project with Ameex before they were purchased by Perficient. Post-support was slow, but acceptable, however as time went on, I stopped getting the level of communication and time itemization I was accustomed to. With Perficient taking over, things devolved pretty quickly, and despite multiple conversations with my account manager - nothing changed, even after bumping up hours to have more dedicated resources. Ultimately, I cancelled the contract this year. Disappointing because their team/work was stellar (and the development team is still solid) before, but the simple asks were continually ignored, and over time, I lost trust that I was getting the hours agreed upon. Towards the end, there was also what felt like a lot of gaslighting of my concerns, and outside of an initial project, I cannot recommend Perficient for ongoing support. Edit: I'm now bumping this to a 1 Star because I've spent the last 3 weeks digging into code and it's one questionable decision after another. Really poor.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
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    4.5 4.5 (20)

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