Best Washington DC Ethereum Blockchain Development Companies

4 Companies - Rankings updated: April 04, 2026

DesignRush assesses agencies using expertise standards and verified client experiences to help you make better decisions. Certain agencies have paid placements.

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  • Probey Services

    World's #1 Rated & Reviewed App, Website & Software Development Company

    Worlds #1 Rated & Reviewed Tech Partner, Probey Services is a world-renowned IT and digital solutions company, headquartered in London, UK, with a state-of-the-art development center in India and 11 international branches across the USA, UK, Australia, Dubai, and beyond.  [... see all Probey Services reviews ]
    Location
    Washington DC, Washington DC
    Number of Employees
    1000 & Up
    Average Hourly Rate
    $50/hr
    Minimal Budget
    Under $1,000
    Portfolios Count
    130 Projects Listed

    Probey Services Services

    • Mobile App Development
    • Software Development
    • Web Development
    • Web Design
    • eCommerce Development
    • WordPress Website Design
    • Digital Marketing
    • Digital Services
    • SEO
    • IT Services
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts

    Clients and Projects

    View Full Portfolio
    • App Development for Health Care
      React Native Project for Health Care Company App Development for Health Care
    • Food Delivery App Development Mealawe
      React Native Project for Food and Beverage Company Food Delivery App Development Mealawe
    • Web App Experience Resort Kaskady
      Web3 Development Project for Restaurants Company Web App Experience Resort Kaskady
    • Web Development - Coexivity
      Web3 Development Project for Corporate Services Company Web Development - Coexivity
    View Full Portfolio
    Comprehensive analysis done by DesignRush Agency Experts.

    Probey Services Reviews & Testimonials

    • Ronan Blake Head-Business & Marketing at Greenmatter Packaging
      5.0★
      Web Design Review from Ronan Blake

      As we are in the sustainability industry, it was essential for us to have a website that not only looks professional but also conveys our brand story clearly and engagingly.The team at Probey Services was extremely responsive and patient throughout the work process. They were open to our feedback, suggested creative ideas, and paid close attention to the small details that made the final result stand out. The website is user-friendly, visually appealing, and has made it much easier for us to showcase our products to potential clients.We’re pleased with the entire experience and would definitely recommend Probey Services to anyone looking for reliable and high-quality website development.

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    • Leander Cross Marketing Director at B Ventures
      5.0★
      Web Design Review from Leander Cross

      I am extremely satisfied with the website Probey Services developed for us. The team took the time to understand our vision and delivered a modern, user-friendly design that perfectly reflects our brand.They combined strong technical skills with smart SEO practices, ensuring fast performance and improved visibility. Communication was clear, deadlines were met, and the entire process was smooth and professional.The experience with Probey Services was more than satisfying.

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    • Mona Kaia
      Mona Kaia Singer at Mona Kaia
      5.0★
      Web Design Review from Mona Kaia

      Probey Services has truly developed and presented my presence as an artist. They created a stunning portfolio and website that beautifully showcases my music, albums, and artistic journey. The branding and logo design were crafted with precision, giving my identity a strong and memorable touch. Other than that I have outsourced my Social Media to them for a year, and their social media marketing strategies have expanded my reach, allowing me to connect with my audience more effectively. The team is professional, responsive, and exceptionally creative, making the entire process smooth and enjoyable. I surely recommend Probey Services to any artist, business or any brand looking to make an impact online. May this project and review bring you all the growth and recognition you deserve.I have attached the required photography as per your specifications. Wishing you and your team great success. Hope you achieve all your goals.Thanks again for your outstanding work. I look forward to future collaborations.

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    Reviews verified by DesignRush and sourced from the agency's profile
    • 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
    View Profile
    5.0 5.0 (103)
    5.0 5.0 (7)

  • Simpalm

    Promising customized mobile and web app solutions

    Discover excellence with Simpalm's digital solutions. We are more than an app development company; we are your partner in crafting exceptional mobile and web experiences.  [... see all Simpalm reviews ]
    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

    Clients and Projects

    View Full Portfolio
    • AUDIOBOOKSNOW
      App Development Project for Publishing Company AUDIOBOOKSNOW
    • ASRA CODER
      App Development Project for Health Care Company ASRA CODER
    • Safety Tracking App
      App Development Project for Public Safety Company Safety Tracking App
    • Midwest Evaluation & Research Mobile And Web App
      App Development Project for Nonprofit Company Midwest Evaluation & Research Mobile And Web App
    • TAPTIN APP
      App Development Project for Social Networks Company TAPTIN APP
    • Bamboo Rewards - Mobile and Web App
      App Development Project for Gaming Company Bamboo Rewards - Mobile and Web App
    View Full Portfolio
    Comprehensive analysis done by DesignRush Agency Experts.

    Simpalm Reviews & Testimonials

    • 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.

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    • 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.

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    • Steve Dickson
      Steve Dickson VP of Operations at Green Threads
      5.0★
      Web Design Review from Steve Dickson

      Simpalm partnered with us to redesign, develop, and deploy our corporate website, providing strong value and creativity throughout the process. Their design phase was particularly impressiveusing Figma, they collaborated closely with us, provided creative infographics and visual assets, and delivered polished branding and wireframes that aligned with our goals. This allowed us to confidently defer much of the creative direction to them while still having opportunities to review, provide input, and iterate over alternatives.Project management was handled through a dedicated project manager, with virtual meetings and a collaborative project site keeping communication organized. From the outset, we agreed that achieving a high-quality design was more important than strict timelines, and Simpalm supported that approach. The design phase was timely and well-executed, and overall, they remained responsive and delivered the key milestones.Most importantly, the website is now fully deployed in production and reflects the design sessions and specifications we set. The end result is a responsive, user-friendly site that enhances our branding and capabilities. What impressed us most was the value Simpalm delivered: strong design and creativity, great collaboration, and a willingness to bring forward ideas while working with us to refine the final product.

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    Reviews verified by DesignRush and sourced from the agency's profile
    • Taptin
    • AudiobookNow
    • Forte Payment System
    • GWU
    • ASRA App
    • Window Nation
    • Winematch Connect
    • Pepsi Inc
    • Blanco
    • KonnectApp
    Data sourced from the agency's DesignRush profile
    View Profile
    5.0 5.0 (49)
    5.0 5.0 (7)

  • Chop Dawg

    Meet The Partner Behind Your App's Success | Make It App'n!

    Meet your award-winning app development team, dedicated to turning your vision into scalable and profitable digital apps and software.  [... see all Chop Dawg reviews ]
    Location
    Washington DC, Washington DC
    Number of Employees
    Under 49
    Average Hourly Rate
    $99/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    52 Projects Listed

    Chop Dawg Services

    • Mobile App Development
    • Software Development
    • Web Development
    • eCommerce Development
    • WordPress Website Design
    • Web Design
    • UI/UX Design
    • Software Testing
    • Wearables
    • AI Development
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts

    Clients and Projects

    View Full Portfolio
    • Dance Workout App & eCommerce Platform Revamp
      App Development Project for Consumer Goods Company Dance Workout App & eCommerce Platform Revamp
    • Real-Time Ice Cream Truck Locator App & Admin App
      App Development Project for Consumer Goods Company Real-Time Ice Cream Truck Locator App & Admin App
    • Unome VIP Membership App & Admin Portal
      App Development Project for Food and Beverage Company Unome VIP Membership App & Admin Portal
    • Slay by Mari Fitness Mobile App & Admin Platform
      App Development Project for Wellness & Fitness Company Slay by Mari Fitness Mobile App & Admin Platform
    • Smart City Mobile App & Admin Platform
      App Development Project for Government Company Smart City Mobile App & Admin Platform
    • AI-Powered List Management Platform
      App Development Project for AI Company AI-Powered List Management Platform
    View Full Portfolio
    Comprehensive analysis done by DesignRush Agency Experts.

    Chop Dawg Reviews & Testimonials

    • Angela Odden
      Angela Odden Owner of Aok at Aok File Away
      4.8★
      Mobile App Development Review from Angela Odden

      Partnering with ChopDawg was hands down one of the smartest moves I've made. From day one, Joshua and Leo Lopez treated my idea with the kind of care and creativity you dream of finding in a development team. What started as a simple concept quickly became something visually stunning beyond anything I imagined.They never made me feel like just another client. Every question we had big or small was met with patience and insight. Their feedback was always honest, their communication consistent, and their commitment unwavering. Weekly Zooms were productive and on point, and their follow through was exceptional. It's clear they don't just build products, they build relationships. And were so grateful for that.

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    • Jeff Gillis CEO at Winelikes
      5.0★
      Mobile App Development Review from Jeff Gillis

      Chop Dawg did an amazing job on not only my app design, but my overall business plan when I hired them. Being a novice in the app world and coding world, they helped me understand what my business plan and app needed to be successful. When it is your baby, you get overprotective and think you are right, but they say when starting a business always surround yourself with experts in the field you are entering, because you are no expert. Chop Dawg and CEO Joshua are experts. They know how design a beautiful app and make sure it is competitive in the marketplace and show you all the intricacies of development to launch. They are great at what they do...just look at their apps! They walk you through the whole process, hold your hand and make sure you are happy with the final product. Any problems that do arise, they are always available and work side by side with you. Not only is your app your baby / business, but it is Chop Dawgs as well!

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    • Think Big
      Think Big Review from Google
      5.0★

      Think Big's Review Sourced from Google

      Your company is being targeted with fake 1-star reviews by an overseas group.The same thing happened to me. Reach out to support. They were able to remove all of mine.You don’t deserve this. What they’re doing is wrong.

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    Reviews verified by DesignRush and sourced from the agency's profile
    • Alpha Paw
    • Big Brothers Big Sisters
    • Choice Home Warranty
    • City of Peachtree Corners, Georgia
    • City of Philadelphia, Pennsylvania
    • City of Springboro, Ohio
    • CRBO
    • FlynnO'Hara
    • Hilton
    • Innovative
    Data sourced from the agency's DesignRush profile
    View Profile
    4.4 4.4 (2)
    4.8 4.8 (70)

  • TechNovaTime

    Technical Solutions and Digital Marketing

    Unlock unmatched potential for your business with our cutting-edge technology solutions. As your dedicated partner, we deliver superior services, ensuring you stay ahead of the curve.  [... view TechNovaTime profile ]
    Location
    Washington DC, Washington DC
    Number of Employees
    Under 49
    Average Hourly Rate
    $80/hr
    Minimal Budget
    $1,000 - $10,000
    Portfolios Count
    1 Project Listed

    TechNovaTime Services

    • AI Development
    • Web Development
    • Mobile App Development
    • Big Data Analytics
    • Blockchain
    • SEO
    • Digital Marketing
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts

    TechNovaTime Reviews & Testimonials

    • Nooni
      Nooni Review from Google
      5.0★

      Nooni's Review Sourced from Google

      As a non-technical founder, I was struggling to get my product out to market quickly enough. With the overload of information and resources online, I really couldn't figure out what I needed to do. That is, until I came across the Tech Nova team who hand held me every step of the way and were able to make my MVP vision come to life.

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    • Ashraf Bedir
      Ashraf Bedir Review from Google
      5.0★

      Ashraf Bedir's Review Sourced from Google

      This company has been a great partner for my Amazon store, Holey Pillows. I called up TechNovaTime just to take advantage of the free consultation and trial but immediately knew I would use these guys for the longterm. Their digital marketing team helped me with SEO (a foreign concept to me) content marketing, and social media which has significantly boosted sales. They really understand Amazon inside out and know how to optimize listings. My favorite part of working with them is all the data they give you. They really push the meaning of data-driven results to the max. My advice, go get that free trial or consultation, you wont regret it.

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    • Omar Abdelhamid
      Omar Abdelhamid Review from Google
      5.0★

      Omar Abdelhamid's Review Sourced from Google

      The answer is Yes, give these guys a call. Ive known the company owner for years, and he is a brilliant mind. TechNovaTime was able to boost our website's visibility on search engines with killer SEO strategies. It took time, but it worked. Given that I am in private legal consulting, social media for me is huge and having them manage and engage our audience has been amazing for the company. Another thing worth mentioning is their email marketing. I didnt realize how essential that was since I always hated the idea of cold emailing, but thats also been a game changer. Dont hesitate, book these guys for a call!

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    Reviews verified by DesignRush and sourced from the agency's profile
    • Lucien Faber Art
    • Amazon
    • GP Jewelry
    Data sourced from the agency's DesignRush profile
    View Profile
    5.0 5.0 (7)

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