Searching for a top-rated application modernization services company to future-proof your business? Our directory provides industry-leading experts specializing in transforming legacy systems. With insights from verified client experiences and success stories, we make it easy for you to compare options based on location, budget, and hourly rates to find your next agency partner. 

Best App Modernization Services Agencies

3 Companies-Rankings updated: October 18, 2026

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.

Application Modernization Services × Higher Education × $50,000 & Up ×Clear Filters
  • We build mobile apps, web platforms & AI workflows for organisations doing good in the world.

    3 Sided Cube is a global mobile app and digital development company with a passion for Tech For Good, championing the genius over the generic to build life-saving, life-changing digital solutions...

    Top Services:

    • Mobile App Development
    • Software Development
    • Web Development
    • AI Development
    • Digital Services
    • Show more
    Location
    Bournemouth, United Kingdom
    Number of Employees
    50 - 99
    Average Hourly Rate
    $150/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    5 Projects Listed

    3 Sided Cube Services

    • Mobile App Development
    • Software Development
    • Web Development
    • AI Development
    • Digital Services
    • UI/UX Design
    • Digital Strategy
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • American Red Cross
    • Surfers Against Sewage
    • Omaze
    • Vodafone | Glastonbury Festival
    • LUSH
    • Global Forest Watch
    • The World Resources Institute
    • University Of Bristol
    • GDPC
    • Wonderbly
    Data sourced from the agency's DesignRush profile

    3 Sided Cube Reviews & Testimonials

    • Si Muddell
      Si Muddell Review from Google
      4.0★

      Si Muddell's Review Sourced from Google

      Fantastically positive and driven team who on every interaction you just know care deeply about a) what they do b) what they deliver and c) ultimately the experience the end user will have.Hugely impressed with their personal, creative and energy driven approach at the pitch stage, I commissioned 3SC to help us better scope an app. Their task was to take an in-house developed app prototype, and turn it into a fully fledged technical specification with user stories, MoSCoW prioritisation, costs, and an updated look and feel; all done with audience need at the heart.Myself and the wider team have nothing but very good things to say about 3SC. When reflecting on an agency to work with, loads say they can do it, some can actually do what they say they can do, even less do it in the spirit of real partnership and mutually respect/drive. 3SC do all of these excellently. I highly recommend them.

    • Oliver Morrison
      Oliver Morrison Review from Google
      5.0★

      Oliver Morrison's Review Sourced from Google

      A passionate team of insanely talented experts, producing industry leading technology for good causes. Highly recommend.

    • Kev Borrill
      Kev Borrill Review from Google
      5.0★

      Kev Borrill's Review Sourced from Google

      Great Digital agency with a passion for making great mobile apps in the Tech for good industry

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • Your Story. Our Publishing Expertise.

    House of Publisher provides expert article writing services with original, SEO-friendly, and well-researched content for every industry...

    Top Services:

    • Digital Services
    • Branding
    • Graphic Design
    • Audio Production
    • SEO
    • Show more
    Location
    Hoboken, New Jersey
    Number of Employees
    250 - 499
    Average Hourly Rate
    $100/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    1 Project Listed

    House Of Publisher Services

    • Digital Services
    • Branding
    • Graphic Design
    • Audio Production
    • SEO
    • Call Centers
    • Market Research
    • Translation Services
    • Transcription Services
    • BPO
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Raelonda
    • Brian
    • Timothy
    Data sourced from the agency's DesignRush profile

    House Of Publisher Reviews & Testimonials

    • perry doc
      perry doc Review from Google
      1.0★

      perry doc's Review Sourced from Google

      THe worst publishing place in the world. took my money and fled they are theives. Do not give them money

    • Rebecca Jenkins
      Rebecca Jenkins Review from Google
      5.0★

      Rebecca Jenkins's Review Sourced from Google

      I availed ghostwriting services from House of Publisher, and they also provided me with a complimentary book cover. This really built my trust in them. They handled my project with completed all the work within the given timeframe. Everything delivered perfectly on time. I highly appreciate House of Publisher for their excellent work.

    • Mike Hedson
      Mike Hedson Review from Google
      5.0★

      Mike Hedson's Review Sourced from Google

      House of Publisher did everything for my book they handled the writing, editing, proofreading, formatting and even publishing it on all platforms, including Amazon. When they first told me they would take care of everything I honestly could not believe it. But now I truly do because they worked with such dedication and honestly. I'm so happy that my first book is finally complete and published. That's why I want to say a few words of appreciation for them.

    Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
  • In Code We Trust

    Code Of Us is a company that specializes in delivering custom software solutions to businesses of all sizes...

    Top Services:

    • Web Design
    • UI/UX Design
    • Web Development
    • IoT
    • Mobile App Development
    • Show more
    Location
    Zagreb, Croatia
    Number of Employees
    Under 49
    Average Hourly Rate
    $50/hr
    Minimal Budget
    $50,000 & Up
    Portfolios Count
    1 Project Listed

    Code Of Us Services

    • Web Design
    • UI/UX Design
    • Web Development
    • IoT
    • Mobile App Development
    • Software Development
    • IT Services
    • DevOps Consulting
    Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
    • Teorem
    • Å kolska Knjiga
    • Rimac Automobili
    Data sourced from the agency's DesignRush profile

Why companies trust DesignRush

Every agency is independently vetted before it can be listed or ranked

1

Identity Check

We verify businesses and reviewer LinkedIn profiles for integrity.

Agencies vetted
128,514+
2

Portfolio Review

We review agency work, case studies, and results to confirm skill.

Applicants rejected
48%
3

Ongoing Audit

We monitor listings regularly; outdated agencies are removed.

Agencies verified
3

Some agencies pay for sponsored placement, clearly labeled and held to the same vetting standards.

See how rankings and monetization work.