Explore leading software testing companies that launch high-performing products, detect bugs early, improve stability, and ensure every feature works correctly across devices and environments. For teams focused on the US market, we also highlight trusted partners with region-specific expertise, including top US-based software testing companies.
Best Software Testing Firms
11 Companies-Rankings updated: September 03, 2026
Every agency on DesignRush has been evaluated for its expertise and client feedback to empower informed choices. Some listings include paid partnerships.
Software Outsourcing & Development | 500+ Active Clients
Founded in 2009 by Nacho de Marco and Paul Azorín, BairesDev provides top 1% tech talent to a range of clients, from startups to Fortune 500 companies...
Top Services:
Software Development
Web Development
UI/UX Design
Mobile App Development
Software Testing
Show more
Location
San Francisco, California
Number of Employees
1000 & Up
Average Hourly Rate
$50/hr
Minimal Budget
$50,000 & Up
Portfolios Count
5 Projects Listed
BairesDev Services
Software Development
Web Development
UI/UX Design
Mobile App Development
Software Testing
Web Design
Staff Augmentation
Product Design
ERP Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Google
Salesforce
IBM
Autodesk
Rolls-Royce
SiriuXM
Motorola
Burger King
Chime
Data sourced from the agency's DesignRush profile
BairesDev Reviews & Testimonials
Undisclosed Director of e-commerce solutions at URBN
5.0★
Web Development Review from Undisclosed
We were truly impressed by the BairesDev team's expertise, work ethic, and eagerness to learn. The agency quickly adapted to our corporate culture and integrated seamlessly. When tasked to work on a new platform, it provided solutions within a week. It's like the software version of a versatile and powerful utility infielder.
Undisclosed Engineering Manager at Pinterest
5.0★
Staff Augmentation Review from Undisclosed
BairesDev engineers are the soul of the team. They’re able to identify dependencies and figure out solutions quickly. They strongly exceeded my expectations.
Undisclosed Team Leader at Avigilon
5.0★
Web Development Review from Undisclosed
Following consultations with the BairesDev team, we recognized that the primary objective was to localize the system and concentrate on enhancing the UI, while also upgrading tools to uphold a high-performance analytics system. Witnessing its expertise and ability to address specific issues greatly alleviated our security platform's primary concerns.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Tepia is a software company founded in 2012 with over 30 years of experience in web and mobile app development. We are a passionate and agile team of developers, designers, and strategists who are consistently pushing the boundaries of technology...
Top Services:
Mobile App Development
eCommerce Development
Software Testing
Software Development
UI/UX Design
Show more
Location
Costa Mesa, California
Number of Employees
Under 49
Average Hourly Rate
$100/hr
Minimal Budget
$50,000 & Up
Portfolios Count
2 Projects Listed
Tepia Services
Mobile App Development
eCommerce Development
Software Testing
Software Development
UI/UX Design
Web Design
Web Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Marugame Udon
MicroVention
Henry Schein
Meta
Irvine Company
Participant Media
Pujol's Foundation
MoodMe
RELI Solutions Inc.
SleepCenter of Nevada
Data sourced from the agency's DesignRush profile
Tepia Reviews & Testimonials
Dr. Lesley Kirkpatrick, MD Founder at mindcomb
5.0★
Mobile App Development Review from Dr. Lesley Kirkpatrick, MD
I had a great experience working with Tepia. Abraham, the Founder and CEO, was available, helpful, and actively involved throughout every stage of the process. Kimmy, my assigned project manager, was organized, responsive, and clear in her communication from start to finish.They anticipated potential obstacles before they became issues and approached everything with a thoughtful, solutions-oriented mindset. The team was consistently proactive, professional, and transparent. I truly appreciated their structure and ability to keep things moving smoothly. I would highly recommend working with Tepia.
Robert Beknazarian President at RELI - Windows & Doors
5.0★
Mobile App Development Review from Robert Beknazarian
Working with Tepia Co has been an exceptional experience from start to finish. They played a critical role in developing our mobile app for RELI, and I can confidently say they exceeded our expectations on every levelFrom day one, Tepia demonstrated a deep understanding of both the technical and business sides of app development. They didnt just execute tasks they asked the right questions, challenged assumptions when needed, and helped us think through complex workflows in a way that improved the final product. Their team truly operates as a strategic partner, not just a development vendor The communication was excellent throughout the entire process. We always knew where things stood, timelines were clear, and any issues or changes were handled proactively and transparently. For a project as complex as ours involving pricing logic, user flows, financing options, compliance considerations, and scalability this level of clarity and responsiveness made a huge difference.What really stood out was Tepias attention to detail and commitment to quality. The app they helped build is stable, clean, intuitive, and built with long-term growth in mind. They were thoughtful about architecture, performance, and future enhancements, which is critical for a company like ours that plans to scale aggressively.They were also extremely flexible and patient as our requirements evolved (which happens in real-world startups). Instead of pushing back, they collaborated with us to find smart, efficient solutions that aligned with our vision and budget.If youre a founder or business owner looking for a team that:Truly understands mobile app developmentCommunicates clearly and consistentlyThinks strategically, not just technicallyDelivers high-quality, scalable workI highly recommend Tepia Co without hesitation. They have been a trusted partner in bringing RELI to life, and we look forward to continuing to work with them as we grow
Ara Agopian CEO at Solar Insure
5.0★
Mobile App Development Review from Ara Agopian
I had a great experience with Tepia on our mobile app development. The project was managed very well and finished on time. Thank you Tepia!
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Indeema is a global IoT engineering company. Our team works across the entire technology stack, including firmware development, electronics engineering, cloud platforms, data processing, and web and mobile applications...
Top Services:
Software Development
IoT
Mobile App Development
Wearables
AI Development
Show more
Location
Wroclaw, Poland
Number of Employees
100 - 249
Average Hourly Rate
$50/hr
Minimal Budget
$50,000 & Up
Portfolios Count
8 Projects Listed
Indeema Software Services
Software Development
IoT
Mobile App Development
Wearables
AI Development
Software Testing
Web Design
IT Services
DevOps Consulting
Cloud Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
UDB
Viking Scada
Ads blocker
UBreez
Dol-Sensors
Alice
ShotKam
Dog Cloud
iReDS
Data sourced from the agency's DesignRush profile
Indeema Software Reviews & Testimonials
Ted Selden COO at TouchMD
5.0★
Mobile App Development Review from Ted Selden
They actually suggest things to us. They find better ways of doing things, so they really strive to give their input and their suggestions, which is really nice rather than just building something we are asking them to build.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Top Healthcare Product, Technology, & Venture Design Firm
Sidebench is the top healthcare technology design and software engineering firm in the US. We combine strategy, design, technical architecture at every point of our process. We are known for delivering extraordinary business results...
Top Services:
Mobile App Development
Software Development
AI Development
Wearables
UI/UX Design
Show more
Location
Los Angeles, California
Number of Employees
Under 49
Minimal Budget
$50,000 & Up
Portfolios Count
11 Projects Listed
Sidebench Services
Mobile App Development
Software Development
AI Development
Wearables
UI/UX Design
Web Development
Product Design
CRM Consulting
Cybersecurity
Software Testing
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
American Heart Association
Children's Hospital Los Angeles (CHLA)
Hoag Hospital
Cortica
A16Z (Andreessen Horowitz)
Lightspeed Venture Partners
Microsoft
Rud Bull
HP
Sony
Data sourced from the agency's DesignRush profile
Sidebench Reviews & Testimonials
Abhit Undisclosed at Undisclosed
4.5★
Translation Services Review from Abhit
They provide consulting services for a healthcare service provider. Sidebench contributed their expertise to a comprehensive mobile application to make sure it would pass Apple Store requirements. Thanks to Sidebench`s input, the application launched on the Apple Store after the first submission. Sidebench`s response times were quick, and they were willing to accommodate a unique working arrangement. The relationship that we had was probably unique; most companies would push to do the development themselves. We only needed Sidebench`s know-how, and they were willing to accommodate us.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Innolab AI builds revenue engines, not just software. Jane creates pipeline. Luna closes it.
Innolab AI builds AI systems that sell for you.Jane replaces SDR teams with automated, hyper-personalized outbound.Luna calls and books meetings 24/7 with human-like conversations.We help B2B leaders generate pipeline, cut admin time, and scale revenue without chaos...
Top Services:
AI Development
Mobile App Development
Web Development
Software Testing
Blockchain
Show more
Location
Columbus, Ohio
Number of Employees
50 - 99
Average Hourly Rate
$59/hr
Minimal Budget
$50,000 & Up
Portfolios Count
2 Projects Listed
Innolab Services
AI Development
Mobile App Development
Web Development
Software Testing
Blockchain
Staff Augmentation
UI/UX Design
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Flonest
Dollar Shave Club
Buddy Lee Jump ropes
Data sourced from the agency's DesignRush profile
Innolab Reviews & Testimonials
Buddy Lee CEO at Buddy Lee Jump Ropes
5.0★
B2C Apps Review from Buddy Lee
Innolab delivered exactly what we needed a high quality, AI powered jump training app with realtime feedback and sleek design. The team was professional, collaborative, and hit every milestone on time. Highly recommend them for any innovative app development.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
We are a joint venture of international entrepreneurs and developers. We focus on providing the high level of software development services to our clients that match our German standards. It always results in a very strong, maintainable and reliable software and complete satisfaction of the clients.The...
Top Services:
Blockchain
Web Development
Software Testing
Mobile App Development
IoT
Show more
Location
Bad Nenndorf, Germany
Number of Employees
Under 49
Average Hourly Rate
$75/hr
Minimal Budget
$50,000 & Up
Portfolios Count
3 Projects Listed
German Standard Services
Blockchain
Web Development
Software Testing
Mobile App Development
IoT
Software Development
VR/AR
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
At 2am.tech, we use strategy, design, and technology to create transformative experiences that impact your customers, employees, and business...
Top Services:
Software Development
AI Development
Web Development
IT Services
Software Testing
Show more
Location
Coral Springs, Florida
Number of Employees
50 - 99
Minimal Budget
$50,000 & Up
Portfolios Count
1 Project Listed
2am.tech Services
Software Development
AI Development
Web Development
IT Services
Software Testing
Mobile App Development
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Deallus
Addio
Benchmark54
Data sourced from the agency's DesignRush profile
2am.tech Reviews & Testimonials
Mariano Rossi Review from Google
5.0★
Mariano Rossi's Review Sourced from Google
Working with 2am.tech has been an outstanding experience. Their team is highly professional, communicative, and truly understands the needs of their clients. From the initial consultation to the final product delivery, they demonstrated a deep technical expertise and a commitment to excellence.I highly recommend 2am.tech to anyone looking for high-quality software development and consulting services. Their dedication and technical knowledge make them a top choice in the industry.
Nancy Konter Review from Google
5.0★
Nancy Konter's Review Sourced from Google
Great attention to detail and very responsive to the client. I highly recommend 2am Tech for your custom software needs!
Josh Mendel Review from Google
5.0★
Josh Mendel's Review Sourced from Google
Working with the team @ 2am Tech has been amazing. They are very well organized, conduct themselves with the highest level of professionalism and produce amazing work. Highly recommend!
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
VerifiedVerified by the DesignRush team for authenticity and credibility.
Build it. Run it. Own it.
We embed development teams to build the right AI-enabled custom software, and equip your team to run it...
Top Services:
Software Development
Cloud Consulting
UI/UX Design
eCommerce Development
DevOps Consulting
Show more
Location
St. Louis, Missouri
Number of Employees
Under 49
Minimal Budget
$50,000 & Up
Sketch Development Services Services
Software Development
Cloud Consulting
UI/UX Design
eCommerce Development
DevOps Consulting
Staff Augmentation
AI Development
Software Testing
IT Services
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
U.S. Bank
Centene Corporation
Maritz
Change Healthcare
Stifel
Reinsurance Group of America (RGA)
bioMerieux
CareSource
CENTEGIX
Purina
Data sourced from the agency's DesignRush profile
Sketch Development Services Reviews & Testimonials
Monica Review from Google
5.0★
Monica's Review Sourced from Google
Amazing and talented people. I’ve worked for both client and agency side and can can say their partnership is amazing. They truly care about ongoing operations and not just ending it at a project level. Highly recommend! Message me if you want specifics.
John Andesilich Review from Google
5.0★
John Andesilich's Review Sourced from Google
I own a marketing firm in Troy MO and I recently met with Calvin at Sketch Development Services to discuss a software development project I have been thinking about pursuing. He was very nice, easy to speak to and even though his field is a bit out of my knowledge base, he was able to explain things in a way that made perfect sense. I look forward to working with him and his team in the future and recommend anyone looking for a software or app development company to give them a try.
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Directio is a global tech partner that brings together people, processes, and technology to code successnot just by building software, but by solving todays challenges and preparing businesses for whats next. With a unique blend of consulting, tailored development, and flexible collaboration models, we...
Top Services:
Software Development
Software Testing
DevOps Consulting
IT Services
IT Compliance Solution
Show more
Location
Warsaw, Poland
Number of Employees
100 - 249
Average Hourly Rate
$70/hr
Minimal Budget
$50,000 & Up
Directio Services
Software Development
Software Testing
DevOps Consulting
IT Services
IT Compliance Solution
Cloud Consulting
Staff Augmentation
Managed Services
CRM Consulting
ERP Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
Tacton
Coty
UCC Coffee
Exensor
Webropol
Data sourced from the agency's DesignRush profile
Directio Reviews & Testimonials
Joanna Cinkusz Review from Google
5.0★
Joanna Cinkusz's Review Sourced from Google
Direct Communication provides excellent opportunities to work with clients in the international team, supporting a strong and professional work culture
Michał Krukowski Review from Google
5.0★
Michał Krukowski's Review Sourced from Google
As an Employee I am amazed how good my life became since I joined that company
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Logix Technology is a Vietnam-based Offshore software development company for enterprise, delivering tailored digital solutions for startups, SMEs, and enterprises worldwide...
Top Services:
Mobile App Development
Software Development
Cloud Consulting
Web Development
eCommerce Development
Show more
Location
Ho Chi Minh, Vietnam
Number of Employees
100 - 249
Average Hourly Rate
$25/hr
Minimal Budget
$50,000 & Up
Portfolios Count
1 Project Listed
Logix Technology Services
Mobile App Development
Software Development
Cloud Consulting
Web Development
eCommerce Development
Software Testing
DevOps Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
AI enablement and custom AI development company helping enterprises and mid-market leaders adopt, scale, and succeed with AI - faster, safer, and smarter. We simplify the complexity of enterprise AI by guiding organizations from strategy to deployment, combining consulting, custom development, and proven AI...
Top Services:
Product Design
UI/UX Design
AI Development
IoT
Software Development
Show more
Location
Zagreb, Croatia
Number of Employees
50 - 99
Average Hourly Rate
$100/hr
Minimal Budget
$50,000 & Up
Margins Services
Product Design
UI/UX Design
AI Development
IoT
Software Development
Software Testing
Mobile App Development
Design Services
DevOps Consulting
Data sourced from the agency's DesignRush profile, its website, and other relevant accounts
John Hopkins University
Mars
Croatian Medical Chamber
Data sourced from the agency's DesignRush profile
Margins Reviews & Testimonials
Marko Bajlo Review from Google
5.0★
Marko Bajlo's Review Sourced from Google
I’ve got a chance to cooperate with agency, very professional and problem solving oriented team!
Reviews verified by DesignRush and sourced from the agency's profile View All Reviews
Frequently Asked Questions About Software Testing Companies
What services do software testing firms provide?
Software testing companies provide different testing services to identify errors, security risks, performance issues, and how the software behaves in real-life situations and across devices. As part of their software testing service, they also check if each feature works as expected, fix bugs, make improvements, and make sure new software development updates don’t break existing functions, so the software quality remains stable.
Hourly rates for QA testing range from $25 to $200+. The final cost is determined based on the size of the software or application, its complexity, required testing type, tech stack (custom-built and older legacy systems cost more), and niche.
The rate will also depend on the seniority of the software tester. Across the United States, junior quality assurance (QA) tester may charge $70 to $110 per hour, while the rate for a senior QA mentor and automation engineer can range from $130 to $200 per hour.
Special software testing services such as QA audit goes from $5,000 to $25,000.
How can businesses know what type of software testing do they need?
Businesses can determine what type of testing solutions they need based on the potential impact of failures and the likelihood of defects. Namely, if they encounter:
Core functionality issues: Use functional testing to verify features work as expected
Unstable code or new features: Use unit testing for individual components and integration testing for modules working together
Poor system stability after updates: Seek regression testing to make sure new changes didn't break existing features
Performance and load issues: Use performance and load testing to evaluate speed and scalability
Security issues: Security and penetration testing are commonly used across apps handling sensitive user data
Hard-to-navigate user experience (UX): Pursue usability testing to determine how intuitive the application is for end users
Low compatibility across devices: Compatibility testing can evaluate how good the app works on different browsers, devices, and OS versions
There is also the option to choose between manual and automated testing.
Is automated testing more expensive than manual testing?
As an investment, automated testing is pricier than manual testing but offers a lower cost-per-test over time as it can run the same scripts repeatedly, without human intervention. Conversely, manual testing entails lower upfront fee, but its cost grows linearly as the project grows, as every test cycle requires paid hours from QA testers.
So, for short-term projects or ones with shifting requirements, manual testing is considered a more economical option, whereas for maintenance and regression cycles, automated testing grants better return on investment.
The main distinction between these methodologies is that manual testing relies on human observation and interaction to identify defects, whereas automated testing uses software scripts to compare outcomes against predicted results.
Manual testing is best suited for exploratory testing, usability assessments, ad-hoc bug hunting, and minor hotfix verifications where script development would be inefficient. Automated testing, on the other hand, is primarily used for regression testing to make sure the new code does not break existing features.
How do businesses measure the effectiveness of software testing?
The effectiveness of the software testing is measured via:
Code coverage: The percentage of the code that has been tested
Defect density: The number of defects found per unit of code
Test case effectiveness: The percentage of test cases that identify defects; helps prune redundant and ineffective tests
Time to detect and fix defects: The time it takes to identify and fix software defects and software bugs
Defect leakage: The number of bugs that "escaped" to production versus those caught during the testing phase
ReceiveProposals
For your project
1
Specify your budget, timeline and project requirements
2
Our experts curate a list of up to 5 most qualified candidate agencies
3
We connect you with them so you can choose the most suitable partner