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Top Unit Testing Services in London

Ratings Updated: February 13, 2026

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6 Leaders 8 Contenders

14 Companies

Country: England

City: London

Functional Software Testing: Unit Testing

List of the Top London Unit Testing Companies

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Stingrai Inc.

5.0 17 reviews

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Premier Verified

$1,000+

Undisclosed

10 - 49

London, England

Services provided

45% Application Testing

55% Cybersecurity

Focus Areas

45% Unit Testing

50% Acceptance Testing

5% Regression Testing

Stingrai Inc. is a company specializing in penetration testing and cybersecurity services. The overall feedback from their reviews is overwhelmingly positive, with clients praising their professional approach, clear communication, and effective identification of vulnerabilities. Approximately 87.5% of reviews highlight their good value for cost, while 75% commend their efficient project management and responsiveness. Stingrai Inc.'s manual testing approach is particularly noted for uncovering vulnerabilities missed by automated tests, demonstrating their depth in Software Quality Assurance.

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Average Project Cost Breakdown

Less than $10,000 (5)

What Clients Have Said
Clients consistently highlight Stingrai Inc.'s excellent value for money, often noting their competitive pricing and the quality of service provided. For instance, one client stated they chose Stingrai over others due to 'good value for cost,' while another emphasized that their budget fit well with Stingrai's pricing. Overall, the sentiment is overwhelmingly positive, with many clients expressing satisfaction with the outcomes relative to their investment, often mentioning that their needs were met within budget and on time.
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More responsive than most other service providers

Stingrai Inc. is very responsive
They are a great candidate to start a conversation with. Send them a short message or project inquiry.
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Canada (10) United States (2) Germany (1) Netherlands (1) Poland (1) Spain (1) England (1)

This provider is fluent in 3 languages:

English

Persian

Hindi
London, England

1 Coldbath Square
London, England EC1R 5HL
2 - 5

4165508618

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Valor Software

5.0 20 reviews
Verified

$10,000+

$50 - $99 / hr

50 - 249

London, England

Services provided

10% Application Testing

10% Application Management & Support

10% Custom Software Development +7

10% Enterprise App Modernization

10% IT Staff Augmentation

10% IT Strategy Consulting

10% Mobile App Development

10% UX/UI Design

10% Web Design

10% Web Development

Focus Areas

20% Unit Testing

15% A/B Testing

15% Acceptance Testing +5

10% Installation Testing

10% Integration Testing

10% IoT Testing

10% Regression Testing

10% Sanity Testing

Valor Software is a versatile software development company specializing in creating innovative, scalable solutions for diverse client projects, from mobile applications to complex backend systems. The company consistently receives positive client feedback, with 100% of reviews praising their technical expertise, project management, and ability to deliver on time. Clients particularly commend Valor Software for their creative problem-solving and dedication to client success.

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Industry Experience

Valor Software has demonstrated expertise across various industries, notably Information Technology, Healthcare, eCommerce, Software, Engineering, Wellness & Fitness, and Financial Services. Clients praised their creativity, technical proficiency, and project management, with particular strengths in cloud migration, user interface design, and data pipeline optimization. Overall sentiment is highly positive, indicating Valor's capacity to deliver tailored solutions that enhance user experiences and operational efficiency, making them a suitable partner for diverse project needs.
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Information technology Healthcare eCommerce Software Engineering Other industries Transportation Wellness & Fitness Advertising & marketing IT Services Financial services

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Average Project Cost Breakdown

$50,000 to $199,999 (6) $10,000 to $49,000 (3) $200,000 to $999,999 (1) $1,000,000 to $9,999,999 (1)

What Clients Have Said
Valor Software has received positive feedback regarding their cost and value for money, with multiple clients highlighting that their pricing aligns well with budget constraints while delivering high-quality outcomes. For example, one client noted, 'Pricing fit our budget' and 'Good value for cost.' Another stated, 'They are affordable, which is very good.' Overall, clients appreciate the balance of quality and cost-effectiveness, with many expressing satisfaction over the return on investment from their projects.
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United States (6) Canada (3) Sweden (1) United Arab Emirates (1) England (1)

This provider is fluent in 1 language:

English
London, England

Hatton Garden,5th Floor, Suite 23
London, England EC1N
2 - 5

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Qualitest Group

Not yet reviewed
Verified

Undisclosed

Undisclosed

1,000 - 9,999

London, England

Services provided

100% Application Testing

Focus Areas

15% Unit Testing

30% IoT Testing

20% Installation Testing +2

20% Integration Testing

15% Regression Testing

Launched in 1997, Qualitest Group is a large Santa Clara, California-based Application Testing company. Their team offers Application Testing.
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London, England

Level 2, Equitable House 47 King William Street
London, England EC4R 9AF
1001 - 2000

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TestFort QA Lab

4.9 12 reviews

$10,000+

$25 - $49 / hr

50 - 249

London, England

Services provided

100% Application Testing

Focus Areas

20% Unit Testing

20% Regression Testing

20% Sanity Testing +3

15% Acceptance Testing

15% IoT Testing

10% Installation Testing

TestFort QA Lab specializes in software testing services, offering comprehensive application quality assurance and software validation expertise. The firm receives overwhelmingly positive feedback, with clients highlighting their flexibility, responsiveness, and proficiency in QA testing and application testing across diverse platforms. Approximately 80% of reviewers commend their attention to detail and proactive communication, facilitating smooth project execution and successful outcomes.

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Reviews mention Well-organized projects
Clients have consistently praised TestFort QA Lab for their well-organized project management and clear communication. One client highlighted that the team developed a comprehensive testing strategy and maintained thorough documentation, ensuring transparency throughout the process. Regular updates and responsiveness to inquiries were also noted, contributing to a smooth workflow. Overall, the sentiment reflects high satisfaction with the structured approach and professionalism exhibited by the TestFort team.

Application Testing for Software Cost Management Co

5.0 Jul 17, 2024

The team is very responsive. Whenever we had any questions, they were always ready to arrange a meeting to discuss what they’ve been doing and map out our further steps. Also, they worked within our budget, adjusting the workflow to meet our needs. We also loved how the whole process was organized and managed. The team is proactive and highly knowledgeable.
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Industry Experience

TestFort QA Lab has demonstrated extensive expertise across various industries including finance, healthcare, advertising, and technology. Clients commend their thorough testing processes, particularly in mobile applications and financial services, highlighting significant improvements in software quality and stability. The overall sentiment is highly positive, particularly in sectors where quality assurance is critical, such as financial services and healthcare. Their strengths lie in responsiveness, project management, and a proactive approach to enhancing product reliability, making them a strong partner for organizations seeking rigorous QA support.
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IT Services Software Financial services Advertising & marketing Consulting Other industries

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Average Project Cost Breakdown

Less than $10,000 (3) $10,000 to $49,000 (1) $50,000 to $199,999 (1)

What Clients Have Said
Clients consistently highlighted TestFort QA Lab's excellent value for money, noting that their pricing fit within budgets while delivering high-quality results. For instance, one client remarked on their 'good value for cost' and another emphasized their 'pricing fit our budget.' Overall, sentiment surrounding costs was positive, with multiple clients expressing satisfaction with the return on investment and the quality of services provided.
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Ukraine (4) United States (2) Canada (1) France (1) Israel (1) Switzerland (1)
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Blue Ripples Technologies

4.8 6 reviews

Undisclosed

< $25 / hr

10 - 49

London, England

Services provided

10% Application Testing

40% Custom Software Development

25% IoT Development +2

15% Digital Engineering

10% Microservices Architecture Services

Focus Areas

10% Unit Testing

30% Integration Testing

30% Regression Testing +3

10% Acceptance Testing

10% IoT Testing

10% Sanity Testing

Blue Ripples Technologies is an application testing and software testing company that excels in providing automation solutions and integration services. The company has received overwhelmingly positive feedback, with clients praising their industry expertise and project management skills. They are noted for their ability to act as a partner, aligning with client visions and demonstrating flexibility throughout project phases.

See all 6 projects

1 of 1 Application Testing reviews are 5 stars

1 new review for Application Testing in past 6 months

$50,000 – $199,999 avg. project cost

Application Testing PROJECT HIGHLIGHT

Custom Software Development for Engineering Company
5.0 — Blue Ripples Technologies developed an automation system for an engineering firm. The scope included process automation, integration, instrumentation, software development, testing, and Read more
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Average Project Cost Breakdown

$200,000 to $999,999 (2) $10,000 to $49,000 (1)

What Clients Have Said
Clients consistently commend Blue Ripples Technologies for their competitive pricing and strong value for money. Feedback highlights their ability to deliver high-quality solutions within budget, such as a client noting their 'good value for cost' and another emphasizing 'cost control' during project execution. Overall sentiment reflects satisfaction with the balance between cost and quality, suggesting that clients perceive a favorable return on their investment.
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India (2) Bahrain (1) Malaysia (1)

London, England

Greenside House, 50 Station Rd, Wood Green
London, England N22 7TP
1

+44

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Unibrix

5.0 13 reviews

$10,000+

$25 - $49 / hr

50 - 249

London, England

Services provided

10% Application Testing

40% Web Development

20% Custom Software Development +2

20% Mobile App Development

10% DevOps Managed Services

Focus Areas

25% Unit Testing

25% Acceptance Testing

25% Integration Testing +1

25% Regression Testing

Unibrix is a versatile software development company that excels in development testing, app quality testing, and software quality assurance. With 100% positive feedback, clients commend their project management and adaptability, highlighting their ability to deliver on time with transparent communication and proactive solutions. Notably, 75% of reviewers emphasize their impressive technical expertise and alignment with client values.

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Reviews mention Efficient
Clients consistently praise Unibrix for their efficiency and proactive approach throughout project development. One CEO noted their ability to deliver key milestones on time while simplifying features to enhance progress. Additionally, the team demonstrated flexibility and responsiveness, often anticipating potential challenges. The client highlighted that Unibrix's focus on efficient delivery allowed for a faster development pace without sacrificing quality, underscoring their reliability as a partner.

Web App & Marketplace Development for Furniture Marketplace

5.0 May 12, 2025

Unibrix consistently delivered key milestones on time and often helped us simplify features to avoid unnecessary complexity that would have slowed development. Their team didn’t just focus on getting the job done they focused on doing it efficiently and reliably. Communication was clear, and they were highly responsive to our needs, often anticipating potential roadblocks before they became issues.
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Iceland (4) France (2) United States (2) Austria (1) Poland (1) Singapore (1) England (1)

London, England

3 Hornton Place
London, England W8 4LZ
2 - 5

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Review Rating from Clients

5.0/5.0

Quality

5.0

Schedule

5.0

Cost

5.0

Willing to Refer

5.0

London clients appreciate Unibrix's expertise in web app development and UI/UX design, noting their proactive, responsive approach. The team’s ability to integrate smoothly and deliver on time has improved project efficiency, with clients valuing their reliability and high standards of quality.
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Pixie Labs

5.0 3 reviews

$25,000+

$150 - $199 / hr

2 - 9

London, England

Services provided

10% Application Testing

30% Web Development

20% Custom Software Development +2

20% Mobile App Development

20% UX/UI Design

Focus Areas

20% Unit Testing

20% Installation Testing

20% Integration Testing +2

20% Regression Testing

20% Sanity Testing

Pixie Labs is a versatile digital product development company known for its technical expertise and agile methodology, offering services in API development, sales tool creation, and website building. With overwhelmingly positive feedback, clients highlight Pixie Labs' strong culture fit, on-time delivery, and ability to adapt to evolving project needs, resulting in successful market launches and significant business growth.

See all 3 projects
Reviews mention Timely
Client feedback regarding Pixie Labs highlights a consistently positive sentiment towards their timeliness. The Department Head of Blink Cat Food noted that Pixie Labs delivered everything on time, showcasing high visibility of progress and responsiveness to needs. The absence of any issues during the website launch further underscores their reliability in meeting deadlines, contributing to the overall successful project outcomes.

Website Revamp for Pet Food Company

5.0 Apr 27, 2023

Everything on time, high visibility of progress and next steps, very responsive to our needs. They also delivered without any new website launch drama at all.
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Industry Experience

Pixie Labs has received positive feedback across various industries, notably Healthcare, Information Technology, and Consumer Products. In Healthcare, they excelled in MVP development and API design, significantly enhancing sales processes. The IT sector praised their strategic product development and effective communication, fostering a collaborative environment. In Consumer Products, they delivered a responsive website that improved conversion rates. Overall, Pixie Labs demonstrates strong technical expertise and adaptability, making them a valuable partner for startups and established companies alike in these sectors.
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Healthcare Information technology Consumer Products

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Average Project Cost Breakdown

$50,000 to $199,999 (1)

What Clients Have Said
Clients generally perceive Pixie Labs as offering excellent value for money, with specific feedback highlighting their pricing as fitting within budget and providing good value relative to costs. For instance, one client noted that Pixie Labs delivered significant results, such as a 50% increase in sales, which they attributed to the company's effective solutions. Overall, the sentiment reflects satisfaction with the cost-effectiveness of their services and the quality of deliverables.
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Review Rating from Clients

5.0/5.0

Quality

5.0

Schedule

3.5

Cost

4.0

Willing to Refer

5.0

London-based Pixie Labs excels in digital product development, offering strategy, design, and agile development for clients like Tussell. Reviewers praise their strong communication, cultural fit, and collaborative approach, delivering solutions that enhance platform performance, data quality, and business growth.
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DVT

Not yet reviewed

$10,000+

Undisclosed

250 - 999

London, England

Services provided

20% Application Testing

20% BI & Big Data Consulting & SI

20% Custom Software Development +2

20% IT Staff Augmentation

20% Web Development

Focus Areas

20% Unit Testing

20% Installation Testing

20% Integration Testing +2

20% Regression Testing

20% Sanity Testing

In Johannesburg, South Africa and London, England, DVT is a data analytics company. Their services include BI & big data consulting & SI and IT staff augmentation.
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London, England

Scott House, Suite 1, The Concourse Waterloo Station
London, England SE1 7LY
10 - 15

+44 020 3422 3400

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Sparta Global

Not yet reviewed

Undisclosed

Undisclosed

250 - 999

City of London, England

Services provided

20% Application Testing

10% Corporate Training & Coaching

10% Custom Software Development +6

10% Cybersecurity

10% DevOps Managed Services

10% Digital Engineering

10% IT Managed Services

10% Market Research

10% Robotics Process Automation

Focus Areas

50% Unit Testing

50% Regression Testing

Sparta Global, an Application Testing company, was established in 2014. The midsize team specializes in Application Testing and Market Research.
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TopOneCRM Limited

Not yet reviewed

Undisclosed

Undisclosed

2 - 9

Croydon , England

Services provided

20% Application Testing

40% Cloud Consulting & SI

20% CRM Consulting and SI +2

10% DevOps Managed Services

10% IT Managed Services

Focus Areas

100% Unit Testing

Established in 2015, TopOneCRM Limited is a cloud consulting & SI company. Their services include cloud consulting & SI and CRM consulting and SI.
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LIVITA Software

Not yet reviewed

$5,000+

$25 - $49 / hr

2 - 9

London, England

Services provided

10% Application Testing

35% Mobile App Development

25% Application Management & Support +3

10% AR/VR Development

10% Custom Software Development

10% IT Strategy Consulting

Focus Areas

100% Unit Testing

Established in 2022, LIVITA Software is a small London, England-based application development firm. Their team specializes in Mobile App Development and Application Management & Support.
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Insead Tech

Not yet reviewed

Undisclosed

Undisclosed

250 - 999

London, England

Services provided

10% Application Testing

40% E-Commerce Development

20% ERP Consulting and SI +2

20% Web Development

10% Social Media Marketing

Focus Areas

30% Unit Testing

70% A/B Testing

Insead Tech is a midsize e-commerce development company based in London, England. The team focuses on E-Commerce Development and ERP consulting and SI.
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Testing Minds

Not yet reviewed

Undisclosed

Undisclosed

50 - 249

Basildon, England

Services provided

100% Application Testing

Focus Areas

20% Unit Testing

25% Acceptance Testing

25% Integration Testing +2

20% Regression Testing

10% Installation Testing

Testing Minds is an Application Testing company launched in 2018. The company provides Application Testing.
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360logica Software Testing Services

Not yet reviewed

Undisclosed

Undisclosed

10 - 49

London, England

Services provided

80% Application Testing

10% Custom Software Development

10% Web Development

Focus Areas

20% Unit Testing

20% Installation Testing

20% Integration Testing +2

20% Regression Testing

20% Sanity Testing

360logica Software Testing Services is a Noida, India-based Application Testing company. The team provides Application Testing and Custom Software Development.
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London, England

Suite 560 No 28 Old Brompton Rd., Kensington
London, England SW7 3SS

+44 800 098

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Ability to deliver

Focus

Proven

Market Leaders

Emerging

Niche

Clutch Leaders Matrix

Rollover to see company insights or click a company below for more details.

1 Valor Software

2 Stingrai Inc.

3 TestFort QA Lab

4 Blue Ripples Technologies

5 Unibrix

6 Pixie Labs

A Clutch Leaders Matrix provides a broad view of the top-performing companies in a particular service or location. Each company featured in a Leaders Matrix is evaluated based on Focus and Ability to Deliver. The size of each circle indicates that company’s size.

By using verified reviews, focused service details, and real project data, the Leaders Matrix highlights companies that consistently deliver and stand out from the rest. Each company’s position is based on how well they focus on a service area and how consistently they deliver results, helping you make informed, confident decisions. Learn More

Focus (x-axis)

Focus accounts for a company’s specialization within a certain service.

Ability to Deliver (y-axis)

Ability to Deliver considers three criteria:

Client feedback and reviews
Work experience and previous projects
Market presence and reputation in the industry

List of the Top 6 London Unit Testing Companies

Valor Software

$10,000+

$50 - $99 / hr

50 - 249

Lakewood, CO

Ability to deliver

38.4/40.0

18.6/20 Reviews

10/10 Clients & Experience

9.8/10 Market Presence

Service focus

10% Application Testing

20% Unit Testing

90% Other

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Stingrai Inc.

$1,000+

Undisclosed

10 - 49

Toronto, Canada

Ability to deliver

32.3/40.0

18.4/20 Reviews

6.2/10 Clients & Experience

7.6/10 Market Presence

Service focus

45% Application Testing

45% Unit Testing

55% Other

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TestFort QA Lab

$10,000+

$25 - $49 / hr

50 - 249

London, England

Ability to deliver

32.2/40.0

17/20 Reviews

8.7/10 Clients & Experience

6.5/10 Market Presence

Service focus

100% Application Testing

20% Unit Testing

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Blue Ripples Technologies

Undisclosed

< $25 / hr

10 - 49

Thiruvananthapuram, India

Ability to deliver

31/40.0

15.8/20 Reviews

10/10 Clients & Experience

5.2/10 Market Presence

Service focus

10% Application Testing

10% Unit Testing

90% Other

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Unibrix

$10,000+

$25 - $49 / hr

50 - 249

Cherkasy, Ukraine

Ability to deliver

24.7/40.0

19.2/20 Reviews

0.6/10 Clients & Experience

4.9/10 Market Presence

Service focus

10% Application Testing

25% Unit Testing

90% Other

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Pixie Labs

$25,000+

$150 - $199 / hr

2 - 9

London, England

Ability to deliver

26.2/40.0

16.8/20 Reviews

4/10 Clients & Experience

5.3/10 Market Presence

Service focus

10% Application Testing

20% Unit Testing

90% Other

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Qualitest Group

Undisclosed

Undisclosed

1,000 - 9,999

Santa Clara, CA

Ability to deliver

9.7/40.0

0/20 Reviews

1.2/10 Clients & Experience

8.5/10 Market Presence

Service focus

100% Application Testing

15% Unit Testing

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DVT

$10,000+

Undisclosed

250 - 999

Johannesburg, South Africa

Ability to deliver

5.2/40.0

0/20 Reviews

0/10 Clients & Experience

5.2/10 Market Presence

Service focus

20% Application Testing

20% Unit Testing

80% Other

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Sparta Global

Undisclosed

Undisclosed

250 - 999

City of London, England

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

20% Application Testing

50% Unit Testing

80% Other

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TopOneCRM Limited

Undisclosed

Undisclosed

2 - 9

Croydon , England

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

20% Application Testing

100% Unit Testing

80% Other

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LIVITA Software

$5,000+

$25 - $49 / hr

2 - 9

London, England

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

10% Application Testing

100% Unit Testing

90% Other

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Insead Tech

Undisclosed

Undisclosed

250 - 999

London, England

Ability to deliver

0/40.0

0/20 Reviews

0/10 Clients & Experience

0/10 Market Presence

Service focus

10% Application Testing

30% Unit Testing

90% Other

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Testing Minds

Undisclosed

Undisclosed

50 - 249

Basildon, England

Ability to deliver

4/40.0

0/20 Reviews

0/10 Clients & Experience

4/10 Market Presence

Service focus

100% Application Testing

20% Unit Testing

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360logica Software Testing Services

Undisclosed

Undisclosed

10 - 49

Noida, India

Ability to deliver

5.8/40.0

0/20 Reviews

0/10 Clients & Experience

5.8/10 Market Presence

Service focus

80% Application Testing

20% Unit Testing

20% Other

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Specialties

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Top Unit Testing Services in London

List of the Top London Unit Testing Companies

Average Project Cost Breakdown

What Clients Have Said

Stingrai Inc. is very responsive

Industry Experience

Select Industry to see insights

Average Project Cost Breakdown

What Clients Have Said

Reviews mention Well-organized projects

Application Testing for Software Cost Management Co

Industry Experience

Select Industry to see insights

Average Project Cost Breakdown

What Clients Have Said

Custom Software Development for Engineering Company

Average Project Cost Breakdown

What Clients Have Said

Reviews mention Efficient

Web App & Marketplace Development for Furniture Marketplace

Reviews mention Timely

Website Revamp for Pet Food Company

Industry Experience

Select Industry to see insights

Average Project Cost Breakdown

What Clients Have Said

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List of the Top 6 London Unit Testing Companies

Similar Categories

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Specialties