Our industry experts identified the top-rated software development companies in Washington DC that build custom-tailored solutions to help businesses streamline operations, increase their sales potential and more. Filter agencies by rates, expertise, reviews, etc., to choose the best partner for your needs.

Organic rankings are determined by five factors: top services, reviews, portfolio, awards/press, and team expertise. Sponsored listings pay for a placement that appears above organic positions. Sponsorship does not affect star ratings or review content - read more on our methodology page.

United States × Washington DC × Construction ×Clear Filters
  • Probey Services

    VerifiedVerified by the DesignRush team for authenticity and credibility.

    We help businesses in building Web, App, Software, and Adapting AI Solutions.

    Probey Services builds websites and mobile apps on WordPress, Shopify, and Flutter, for clients like Lineage and Gunzilla Games. Its team of 320+ developers covers eCommerce, healthcare, and edtech across 30+ countries. Best fit for SMBs needing affordable development services...

    Top Services:

    • Mobile App Development
    • Software Development
    • Web Development
    • Web Design
    • WordPress Website Design
    • Show more
    Location
    Washington DC, Washington DC
    Number of Employees
    250 - 499
    Average Hourly Rate
    $10/hr
    Minimal Budget
    Under $1,000
    Portfolios Count
    94 Projects Listed

    Probey Services Services

    • Mobile App Development
    • Software Development
    • Web Development
    • Web Design
    • WordPress Website Design
    • Digital Marketing
    • Digital Services
    • SEO
    • IT Services
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Bartisans
    • Samyakk
    • 30 Days Fitness
    • Isharya
    • The Estate Residences
    • VegenMart
    • Fresh Menu Application
    • PRAO Fashion Jewellery
    • Audentia Space
    • Wings of Change
    Data sourced from the agency's DesignRush profile

    Probey Services Reviews & Testimonials

    • Rajat Sinh
      Rajat Sinh Founder at Aaayan Systems
      5.0★

      Web Development Review from Rajat Sinh

      Probey transformed our outdated website into a modern, high-performing platform by understanding our business goals and delivering the right solutions. Since the launch, we have seen significant growth in website traffic, lead conversions, and operational efficiency through their backend integrations. Impressed with their expertise and quality of work, we also trusted Probey with our CRM development project as well. Thank you to the entire Probey Services team for your professionalism and support.

    • Roshan
      Roshan CEO at NanoTherapX
      5.0★

      Web Design Review from Roshan

      This is Roshan, CEO at NanoTherapX. Working with Probey Services for our CRM Development. What stood out most was their stability, consistency, reliability, and a smooth implementation. The CRM has streamlined our client management, improved team efficiency, and helped us manage operations more effectively. Since its implementation, we've seen better productivity and consistent business growth. I highly recommend Probey Services UK to any business looking for a reliable technology partner.

    • Tejaswini
      Tejaswini Director at Green Matter Packaging
      5.0★

      Mobile App Development Review from Tejaswini

      What stands out most about Probey Services is their discipline-no missed calls, no vague timelines, and no surprises. They built our mobile app with a level of professionalism that made us feel like a priority throughout the project. The delivery was on schedule, the code quality was excellent, and the final product met high standards. Since the app launch, we've seen consistent business growth, and managing customer orders has become much more efficient. I highly recommend Probey Services UK to any business looking for a dependable technology partner.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Promising customized mobile and web app solutions

    Simpalm builds mobile, web, and AI apps using React Native, Flutter, and Node.js, with clients like University of Maryland and AudioBooksNow. The software development agency serves startups, nonprofits, and government. It’s best for businesses needing a US-based mobile and web development partner...

    Top Services:

    • Mobile App Development
    • Web Development
    • Web Design
    • UI/UX Design
    • eCommerce Development
    • Show more
    Location
    Washington DC, Washington DC
    Number of Employees
    Under 49
    Minimal Budget
    $10,000 - $25,000
    Portfolios Count
    22 Projects Listed

    Simpalm Services

    • Mobile App Development
    • Web Development
    • Web Design
    • UI/UX Design
    • eCommerce Development
    • WordPress Website Design
    • Software Development
    • Staff Augmentation
    • AI Development
    • Software Testing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Taptin
    • AudiobookNow
    • Forte Payment System
    • GWU
    • ASRA App
    • Window Nation
    • Winematch Connect
    • Pepsi Inc
    • Blanco
    • KonnectApp
    Data sourced from the agency's DesignRush profile

    Simpalm Reviews & Testimonials

    • Guiulianna Cespedes
      Guiulianna Cespedes Founder at Quynza
      5.0★

      Mobile App Development Review from Guiulianna Cespedes

      Our company needed an Android app that could support a mental health platform in a way that felt calm, easy to use, and dependable for daily users. We hired Simpalm to build that product in Kotlin and help us move from concept into something real customers could use. For us, trust and simplicity mattered more than packing in too many features.They took a fairly hands-on role, which was helpful because we were still making product decisions as the project moved. Some weeks I was deeply involved reviewing screens, and other weeks they pushed things forward on their own. That balance worked well. They would usually come back with two or three options instead of just asking what we wanted.We did hit one rough patch around notifications where the first version didn’t behave the way we expected, so that had to be revisited. They fixed it without making the process difficult.The finished app runs smoothly, feels organized, and gave us a much stronger mobile presence on Android. Most importantly, early users found it approachable rather than overwhelming, which was exactly what we wanted.

    • Amanda Chalofsky Owner/Founder at Neuro Speech & Swallowing Services
      5.0★

      Mobile App Development Review from Amanda Chalofsky

      My experience with Simpalm was very good. They made a full prototype of our neuro-wellness app so we could show partners and investors what our system looks like. It matched our brand and showed the flow in a simple way. Their communication was steady, they stayed on time, and they explained things clearly. The prototype helped people understand our idea fast, and it moved our project forward. I felt supported the whole time.

    • Matt Rudnick
      Matt Rudnick Founder and CEO at Main Sheet LLC
      5.0★

      Mobile App Development Review from Matt Rudnick

      Working with Simpalm has been a really positive experience. We hired them to handle the frontend development of our mobile app for iOS and Android, while our backend was already in place. From the start, their team communicated clearly, stayed organized, and met every deadline we set. They were flexible when we added new features, and their designer’s input really helped improve the look and usability of the app. I appreciated how reliable and easy they were to work with having a U.S.-based team made communication smooth and fast.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Custom Software to Reach Your Vision

    We create custom software solutions that transform your process, empower your people, and help you reach your vision. Our team of experts partner with you in a radically transparent process to understand your unique needs, then build a powerful software solution that is scalable, efficient, and cost...

    Top Services:

    • AI Development
    • Software Development
    • Mobile App Development
    • IT Services
    • Cybersecurity
    • Show more
    Location
    Washington DC, Washington DC
    Number of Employees
    50 - 99
    Average Hourly Rate
    $150/hr
    Portfolios Count
    3 Projects Listed

    Orases Services

    • AI Development
    • Software Development
    • Mobile App Development
    • IT Services
    • Cybersecurity
    • Big Data Analytics
    • UI/UX Design
    • Web Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • NFL Foundation
    • MLB Pitch, Hit & Run
    • NFL Flag Football
    • NFL Punt, Pass & Kick
    • K2M
    • Mental Health Association
    • José Andrés
    • Academy90
    • American Society of Interior Designers
    • American Kidney Fund
    Data sourced from the agency's DesignRush profile

    Orases Reviews & Testimonials

    • Jonathan Gessert
      Jonathan Gessert CEO at 321 Web Marketing
      5.0★

      Software Development Review from Jonathan Gessert

      We partnered with Orases to develop and maintain a multi-tenant workflow management system and customer portal, tailored to streamline our customers and internal team's creation processes. Our previous systems used dated technologies, but Orases stepped in with a PHP and React solution that transformed how we plan, write, edit, review, and publish content at substantial scale. The system now fully supports our end-to-end workflow, allowing for seamless collaboration across teams while significantly improving overall efficiency.Orases exceeded our expectations by delivering a demo in just six months, with the full application live within eight months. Their attention to detail, consistent communication, and ability to stay on schedule were remarkable throughout the project. Their project management approach was highly effective, ensuring that every stage of development was completed with precision and aligned with our needs.The results have been outstanding. The new system has enabled us to increase productivity, handle more complex projects, and reduce the time spent in content quality assurance and client feedback loops. This has directly contributed to our companys growth and enhanced our ability to scale operations efficiently.What stood out most was Orases's methodical and thoughtful approach. They took the time to deeply understand our goals and delivered a solution that met both our immediate needs and long-term business objectives. Their commitment to excellence and alignment with our vision truly made a difference.Working with Orases has been an incredible experience, and their ability to provide innovative solutions, paired with their outstanding teamwork, has been a major asset. We look forward to continued collaborations with their talented team.

    • Tiffany Thomas
      Tiffany Thomas Review from Google
      5.0★

      Tiffany Thomas's Review Sourced from Google

      Working with Orases has been a game-changer. From day one, they understood our goals and challenges, then delivered a custom solution that streamlined our operations, improved the customer experience, and helped grow our bottom line.

    • Nema Semnani
      Nema Semnani Review from Google
      5.0★

      Nema Semnani's Review Sourced from Google

      I'm way overdue in leaving this review. The team at Orases are the best in the biz when it comes to all aspects of app/software development, especially AI software dev. They've been instrumental in helping guide us through the ever-changing landscape of AI, since it definitely feels like if we blink, what we thought was cutting-edge in AI, becomes "old news." Orases helps us stay ahead of the curve...plus on a personal level, they're a genuine joy to work with. Highly recommend!

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

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Frequently Asked Questions

What are the most requested services of custom software development firms?

The most requested services from custom software development firms are almost entirely AI-based products, delivered primarily through web application development, mobile development, AI agent development, and legacy system refactoring. UX/UI design, cloud infrastructure, DevOps, and QA automation are typically not sold as standalone services; instead, they are embedded within each of these project types.

As reported by Diffco, year-over-year trends show a prevailing shift: AI agent development has grown from a niche request into a significant share of overall volume, while demand for legacy system refactoring continues to rise as clients seek to prepare their existing systems to support AI capabilities.

ServiceShare of total demand
Web application development40%
Mobile app development30%
AI agent development20%
Legacy system refactoring10%

How much does a software development company charge for its services?

Software development services typically cost $50,000 for MVPs to $2 million+ for enterprise software. US developers generally charge $120-$200/hour, while developers in Europe and Asia charge around $25-$150/hour.

How do I determine if a global company is the right size for my project?

To determine if a global software development agency is the right size for your project, match project complexity and scale to company capacity.

Choose a large/global agency with 1000+ staff, if your project:

  • Is complex or enterprise-grade, includes multiple software solutions, integrations, and compliance
  • Requires multiple roles in parallel (project management, UX/UI design, backend, quality assurance (QA), DevOps)
  • Needs 24/7 support, multi-time-zone delivery, or long-term maintenance

Large software development companies reduce delivery risk for complex programs but typically charge higher rates and use more structured processes.

Choose a small or mid-size agency with 10-200 staff if your project:

  • Is an MVP or mid-scale build
  • Requires speed, flexibility, and direct access to senior talent
  • Has a tighter budget and well-defined scope

Who owns the Intellectual Property (IP) and source code at the end of the project?

In most software development projects, the client owns the Intellectual Property (IP) and source code upon completion of the engagement, unless the contract explicitly states otherwise. Standard practice dictates that the ownership of the source code, documentation, design elements, and custom deliverables belongs to the client upon full payment. Contracts typically use "work made for hire" or an IP assignment clause to formalize this. 

Third-party or open-source components, however, are not owned by the client. Instead, they are used under their respective licenses. Some agencies retain ownership of pre-existing frameworks or reusable tools and grant the client a license to use them. You should also know that IP ownership is not automatic. To avoid disputes, ensure the contract clearly states full IP and source-code ownership transfers to you upon payment, with no usage limitations.

What tools and frameworks do software developers use?

They use various tools and frameworks, depending on the type of digital product they’re building. But the most common include: 

  • Full-stack JavaScript: MERN, MEAN, Jamstack (ex, Next.js)
  • Backend: Java-Spring, Python, Django, Ruby on Rails, LAMP
  • UI and Cross-Platform Development: React, Angular, Vue, Qt
  • Languages: JavaScript, TypeScript, Python, Kotlin 
  • AI and Data-Driven Development: Python, Hugging Face, LangChain, Apache Spark, Kafka, Kubeflow, Lite, ONNX, Replit
  • QA and Testing: Selenium, Cypress, Jenkins, GitLab, JMeter, OWASP ZAP, Testim, Mabl

What are the best software development companies in 2026?

What questions should I ask before hiring a software development company?

Before hiring a software development company, ask:

 

  • Have you built similar software before?
  • Which technologies will you use?
  • Who will work on my project?
  • What is included in the scope?
  • How long will development take?
  • How do you handle testing and security?
  • Do you provide support after launch?

How do I reduce the risk of hiring the wrong software development company?

Check the company’s exit terms and review cadence before comparing prices. Short notice periods and frequent demos give you more opportunities to spot problems and change direction early. For example, Designli uses biweekly demos, offers a refundable first 14 days, and allows clients to cancel with 30 days’ notice.

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