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Publicly listed on BSE · ISO 27001 & SOC 2 Type II certified
Publicly listed on BSE · ISO 27001 & SOC 2 Type II certified
Client Reviews · Verified Across 4 Platforms
From enterprise Salesforce programs to decade-long staff augmentation partnerships -
read what clients say, on the platforms that verify them.
BSE-Listed | ISO 27001 Certified | SOC 2 Type II compliant | 600+ In-house Experts
Where we're rated
Independent platforms verify every review. We link straight to the profiles so you can check the sources yourself.
4.5/5
350+ Reviews
Public reviews for Capital Numbers Infotech, Kolkata.
Featured reviews
Named reviewers. Verified platforms. Proven delivery across enterprise CRM, fintech engineering, healthcare technology, and large-scale digital programs.
“Capital Numbers delivered high-quality outputs, enabling us to manage quotations more quickly and easily. They were very transparent and highly adjustable to our needs.”
Nikola Pejak
Salesforce Product Owner, Veolia Middle East — Dubai, UAE
Engagement
Their team was very flexible, allowing me to do Jeff Baird Owner, Plain English Enterprises
Clutch Verified“The developers thought critically about architecture and design decisions like senior engineers would. They could scale up or down with my needs — whether you need full-stack developers, testers, or other engineering talent, Capital Numbers delivers a smooth, professional experience.”
Ashwin K.
A Flexible, Professional Partner for Engineering Talent — United States
Trustpilot Verified“The most unique thing is their importance on the relationship. They are willing to work with us closely — and they have continued to enhance their code quality and delivery throughout the partnership.”
Kaustav Ghoshal
Sr. Director of Software Engineering, Linear Financial Technologies — New York City
Clutch Verified“We did a trial with 3 different companies for 1 month giving each of them 3 retailers and found Capital Numbers were the best in terms of professionality, code efficiency and quick turnarounds.”
Sushmitha Shetty
Senior BI Developer, Colart International Holdings Limited
Clutch Verified4.8
Average rating across 750+ reviews
236
Verified Clutch reviews
98%
Of Clutch reviewers willing to refer us
250+
Global clients served
Featured video testimonials
Real stories from businesses that trusted us to transform their ideas into successful digital products.
Alina Mannor
TalkIndeed, Israel
Consistent Excellence
CN has been our development partner for the past three years, giving us access to a diverse technical team as needed. Their planning is thorough, they consistently deliver on what they promise, and expectations are always met.
Alexis Nguyen
Assisting Hands Home Care, Florida, US
Craig Clarke
Digital Wealth Solutions, UK
Peter Pluta
Next Edge, Switzerland
All reviews
Every quote below is shown verbatim from Clutch, Trustpilot or Google — with the platform, date and reviewer attached.
“Custom HubSpot CMS landing pages — thoughtful design, responsive to feedback, and quick on delivery.”
August 29, 2025
Sara Oberg
Client — United States
Trustpilot“Our luxury brand website was online in just 4 weeks. The team showed maximum availability and competence, and put us in an ideal position to update the site autonomously.”
August 20, 2025
Lorenzo Del Biondo · DEBLONDE.IT
Founder — Italy
Trustpilot“We used Capital Numbers for Laravel/PHP projects for several years — they truly helped our business when we needed it most.”
May 2, 2025
Pete Schwager
Excellent partners for your business — United States
Trustpilot“Capital Numbers delivered stable software we can rely on — responsive, collaborative, and accurate to our requirements, all within our timeline.”
January 21, 2025
Steve Carlsson · Trade Radar
Director & Owner — Perth, Australia
Clutch Verified“They exceeded our expectations and proved to be quick problem-solvers.”
March 18, 2024
Stephen Smith
Project Manager, The Internet of Team LLC, Austin, Texas
Clutch Verified“Capital Numbers integrated our Shopify apps and optimized site performance — we now process orders efficiently with limited staff effort.”
June 19, 2023
Bryn Morrow · Peggy Porschen Group Ltd
Managing Director — London, UK
Clutch“It’s like having another full-time remote employee. We liked them so much, we hired a full-time iOS and Android developer too — and I’ve worked with Fiverr, Upwork and other outsourcing firms; Capital Numbers is the best.”
June 6, 2022
Brett Henrichsen
Client — United States
Trustpilot“Their process is easy and collaborative, but doesn’t demand much of me. We don’t plan to change development teams anytime soon.”
January 27, 2022
Nicholas Werker · Answering Legal
Director of Marketing — Southampton, NY
Clutch Verified“For 5+ years, Capital Numbers has developed our custom cloud ERP — a smart and robust software that manages our daily business. The price is fair, the output is professional, and it has all been very consistent over the years.”
July 28, 2021
Michelle T.
Software Designer — United States
Trustpilot“Two websites and an iOS app in 7 months — it takes a huge amount of HR headache away. The developers are knowledgeable, dedicated, and extremely responsive.”
Rain Wang
Client
“Our bespoke business system needed updates and fixes, and Capital Numbers saved the day — clear communication throughout, with everything explained so we could run it going forward.”
Claire Wrightson
Business Owner
“Not just a facelift — a custom template tailored to our needs, with all data transferred seamlessly. Every aspect was meticulously tested; what they delivered was not just functional but flawless.”
Jason M.
Repeat Client · Local Guide
“We were most impressed with their willingness to listen and adjust their designs where necessary.”
Nick Stockbridge
Director, Transmedia Communications Ltd - London, England
Clutch Verified“Their fast response was impressive.”
Jorge Quintero
COO, Blue Lagoon Jets
Clutch Verified“Workflow has been pretty seamless. Their willingness to be flexible impressed us the most.”
Jon Kayser
Owner & Senior Marketing Consultant, Insite Marketing Source
Clutch Verified“Everyone I have dealt with from the company has been extremely courteous and professional.”
Norabeth Duignan
Operations & Brand Manager — Natur House
Clutch Verified“Their response times were very fast, and they gave us great constructive feedback.”
Jessica Dixon
Owner, LocGo - Saint Cloud, Minnesota
Clutch Verified“Their professionalism and ability to deliver impressed us.”
NJoe Cassell
Business Dev Manager, Quality Resource Solutions, LLC
Clutch Verified“Custom HubSpot CMS landing pages — thoughtful design, responsive to feedback, and quick on delivery.”
August 29, 2025
Sara Oberg
Client — United States
Trustpilot“We used Capital Numbers for Laravel/PHP projects for several years — they truly helped our business when we needed it most.”
May 2, 2025
Pete Schwager
Excellent partners for your business — United States
Trustpilot“They exceeded our expectations and proved to be quick problem-solvers.”
March 18, 2024
Stephen Smith
Project Manager, The Internet of Team LLC, Austin, Texas
Clutch Verified“It’s like having another full-time remote employee. We liked them so much, we hired a full-time iOS and Android developer too — and I’ve worked with Fiverr, Upwork and other outsourcing firms; Capital Numbers is the best.”
June 6, 2022
Brett Henrichsen
Client — United States
Trustpilot“For 5+ years, Capital Numbers has developed our custom cloud ERP — a smart and robust software that manages our daily business. The price is fair, the output is professional, and it has all been very consistent over the years.”
July 28, 2021
Michelle T.
Software Designer — United States
Trustpilot“Our bespoke business system needed updates and fixes, and Capital Numbers saved the day — clear communication throughout, with everything explained so we could run it going forward.”
Claire Wrightson
Business Owner
“We were most impressed with their willingness to listen and adjust their designs where necessary.”
Nick Stockbridge
Director, Transmedia Communications Ltd - London, England
Clutch Verified“Workflow has been pretty seamless. Their willingness to be flexible impressed us the most.”
Jon Kayser
Owner & Senior Marketing Consultant, Insite Marketing Source
Clutch Verified“Their response times were very fast, and they gave us great constructive feedback.”
Jessica Dixon
Owner, LocGo - Saint Cloud, Minnesota
Clutch Verified“Our luxury brand website was online in just 4 weeks. The team showed maximum availability and competence, and put us in an ideal position to update the site autonomously.”
August 20, 2025
Lorenzo Del Biondo · DEBLONDE.IT
Founder — Italy
Trustpilot“Capital Numbers delivered stable software we can rely on — responsive, collaborative, and accurate to our requirements, all within our timeline.”
January 21, 2025
Steve Carlsson · Trade Radar
Director & Owner — Perth, Australia
Clutch Verified“Capital Numbers integrated our Shopify apps and optimized site performance — we now process orders efficiently with limited staff effort.”
June 19, 2023
Bryn Morrow · Peggy Porschen Group Ltd
Managing Director — London, UK
Clutch“Their process is easy and collaborative, but doesn’t demand much of me. We don’t plan to change development teams anytime soon.”
January 27, 2022
Nicholas Werker · Answering Legal
Director of Marketing — Southampton, NY
Clutch Verified“Two websites and an iOS app in 7 months — it takes a huge amount of HR headache away. The developers are knowledgeable, dedicated, and extremely responsive.”
Rain Wang
Client
“Not just a facelift — a custom template tailored to our needs, with all data transferred seamlessly. Every aspect was meticulously tested; what they delivered was not just functional but flawless.”
Jason M.
Repeat Client · Local Guide
“Their fast response was impressive.”
Jorge Quintero
COO, Blue Lagoon Jets
Clutch Verified“Everyone I have dealt with from the company has been extremely courteous and professional.”
Norabeth Duignan
Operations & Brand Manager — Natur House
Clutch Verified“Their professionalism and ability to deliver impressed us.”
NJoe Cassell
Business Dev Manager, Quality Resource Solutions, LLC
Clutch Verified“Custom HubSpot CMS landing pages — thoughtful design, responsive to feedback, and quick on delivery.”
August 29, 2025
Sara Oberg
Client — United States
Trustpilot“Capital Numbers delivered stable software we can rely on — responsive, collaborative, and accurate to our requirements, all within our timeline.”
January 21, 2025
Steve Carlsson · Trade Radar
Director & Owner — Perth, Australia
Clutch Verified“It’s like having another full-time remote employee. We liked them so much, we hired a full-time iOS and Android developer too — and I’ve worked with Fiverr, Upwork and other outsourcing firms; Capital Numbers is the best.”
June 6, 2022
Brett Henrichsen
Client — United States
Trustpilot“Two websites and an iOS app in 7 months — it takes a huge amount of HR headache away. The developers are knowledgeable, dedicated, and extremely responsive.”
Rain Wang
Client
“We were most impressed with their willingness to listen and adjust their designs where necessary.”
Nick Stockbridge
Director, Transmedia Communications Ltd - London, England
Clutch Verified“Everyone I have dealt with from the company has been extremely courteous and professional.”
Norabeth Duignan
Operations & Brand Manager — Natur House
Clutch Verified“Our luxury brand website was online in just 4 weeks. The team showed maximum availability and competence, and put us in an ideal position to update the site autonomously.”
August 20, 2025
Lorenzo Del Biondo · DEBLONDE.IT
Founder — Italy
Trustpilot“They exceeded our expectations and proved to be quick problem-solvers.”
March 18, 2024
Stephen Smith
Project Manager, The Internet of Team LLC, Austin, Texas
Clutch Verified“Their process is easy and collaborative, but doesn’t demand much of me. We don’t plan to change development teams anytime soon.”
January 27, 2022
Nicholas Werker · Answering Legal
Director of Marketing — Southampton, NY
Clutch Verified“Our bespoke business system needed updates and fixes, and Capital Numbers saved the day — clear communication throughout, with everything explained so we could run it going forward.”
Claire Wrightson
Business Owner
“Their fast response was impressive.”
Jorge Quintero
COO, Blue Lagoon Jets
Clutch Verified“Their response times were very fast, and they gave us great constructive feedback.”
Jessica Dixon
Owner, LocGo - Saint Cloud, Minnesota
Clutch Verified“We used Capital Numbers for Laravel/PHP projects for several years — they truly helped our business when we needed it most.”
May 2, 2025
Pete Schwager
Excellent partners for your business — United States
Trustpilot“Capital Numbers integrated our Shopify apps and optimized site performance — we now process orders efficiently with limited staff effort.”
June 19, 2023
Bryn Morrow · Peggy Porschen Group Ltd
Managing Director — London, UK
Clutch“For 5+ years, Capital Numbers has developed our custom cloud ERP — a smart and robust software that manages our daily business. The price is fair, the output is professional, and it has all been very consistent over the years.”
July 28, 2021
Michelle T.
Software Designer — United States
Trustpilot“Not just a facelift — a custom template tailored to our needs, with all data transferred seamlessly. Every aspect was meticulously tested; what they delivered was not just functional but flawless.”
Jason M.
Repeat Client · Local Guide
“Workflow has been pretty seamless. Their willingness to be flexible impressed us the most.”
Jon Kayser
Owner & Senior Marketing Consultant, Insite Marketing Source
Clutch Verified“Their professionalism and ability to deliver impressed us.”
NJoe Cassell
Business Dev Manager, Quality Resource Solutions, LLC
Clutch VerifiedReviews shown verbatim from Clutch, Trustpilot, G2 and Google.
In their words
TrustpilotThe competence, expertise and professionalism of Capital Numbers is unequaled.
Wes Mullings, D.D. — IT veteran since 1996, US
Clutch 5.0The final result exceeded my expectations.
Paul Koeniger — Owner, Fotostudio Paul Königer, Germany
TrustpilotIt’s like having a full-time dedicated employee without the hassles of payroll and HR.
Trustpilot review, Apr 2025
Clutch5.0The page load speed was excellent and was doubled through Capital Numbers.
President — Multitrack Studios, US
TrustpilotThey had the time, resources, and team that understood our needs — delivered very quickly and under budget.
RF — Canada
TrustpilotReally good talent, good management, very accommodating to unique needs.
Trustpilot review, Nov 2024
TrustpilotThe competence, expertise and professionalism of Capital Numbers is unequaled.
Wes Mullings, D.D. — IT veteran since 1996, US
Clutch 5.05.0The final result exceeded my expectations.
Paul Koeniger — Owner, Fotostudio Paul Königer, Germany
Trustpilot5.0It’s like having a full-time dedicated employee without the hassles of payroll and HR.
Trustpilot review, Apr 2025
Clutch 5.05.0The page load speed was excellent and was doubled through Capital Numbers.
President — Multitrack Studios, US
Trustpilot5.0They had the time, resources, and team that understood our needs — delivered very quickly and under budget.
RF — Canada
TrustpilotThe competence, expertise and professionalism of Capital Numbers is unequaled.
Wes Mullings, D.D. — IT veteran since 1996, US
Clutch 5.0The final result exceeded my expectations.
Paul Koeniger — Owner, Fotostudio Paul Königer, Germany
TrustpilotIt’s like having a full-time dedicated employee without the hassles of payroll and HR.
Trustpilot review, Apr 2025
Clutch5.0The page load speed was excellent and was doubled through Capital Numbers.
President — Multitrack Studios, US
TrustpilotThey had the time, resources, and team that understood our needs — delivered very quickly and under budget.
RF — Canada
TrustpilotReally good talent, good management, very accommodating to unique needs.
Trustpilot review, Nov 2024
TrustpilotThe competence, expertise and professionalism of Capital Numbers is unequaled.
Wes Mullings, D.D. — IT veteran since 1996, US
Clutch 5.05.0The final result exceeded my expectations.
Paul Koeniger — Owner, Fotostudio Paul Königer, Germany
Trustpilot5.0It’s like having a full-time dedicated employee without the hassles of payroll and HR.
Trustpilot review, Apr 2025
Clutch 5.05.0The page load speed was excellent and was doubled through Capital Numbers.
President — Multitrack Studios, US
Trustpilot5.0They had the time, resources, and team that understood our needs — delivered very quickly and under budget.
RF — Canada
TrustpilotThe competence, expertise and professionalism of Capital Numbers is unequaled.
Wes Mullings, D.D. — IT veteran since 1996, US
Clutch 5.0The final result exceeded my expectations.
Paul Koeniger — Owner, Fotostudio Paul Königer, Germany
TrustpilotIt’s like having a full-time dedicated employee without the hassles of payroll and HR.
Trustpilot review, Apr 2025
Clutch5.0The page load speed was excellent and was doubled through Capital Numbers.
President — Multitrack Studios, US
TrustpilotThey had the time, resources, and team that understood our needs — delivered very quickly and under budget.
RF — Canada
TrustpilotReally good talent, good management, very accommodating to unique needs.
Trustpilot review, Nov 2024
TrustpilotThe competence, expertise and professionalism of Capital Numbers is unequaled.
Wes Mullings, D.D. — IT veteran since 1996, US
Clutch 5.05.0The final result exceeded my expectations.
Paul Koeniger — Owner, Fotostudio Paul Königer, Germany
Trustpilot5.0It’s like having a full-time dedicated employee without the hassles of payroll and HR.
Trustpilot review, Apr 2025
Clutch 5.05.0The page load speed was excellent and was doubled through Capital Numbers.
President — Multitrack Studios, US
Trustpilot5.0They had the time, resources, and team that understood our needs — delivered very quickly and under budget.
RF — Canada
TrustpilotThe competence, expertise and professionalism of Capital Numbers is unequaled.
Wes Mullings, D.D. — IT veteran since 1996, US
Clutch 5.0The final result exceeded my expectations.
Paul Koeniger — Owner, Fotostudio Paul Königer, Germany
TrustpilotIt’s like having a full-time dedicated employee without the hassles of payroll and HR.
Trustpilot review, Apr 2025
Clutch5.0The page load speed was excellent and was doubled through Capital Numbers.
President — Multitrack Studios, US
TrustpilotThey had the time, resources, and team that understood our needs — delivered very quickly and under budget.
RF — Canada
TrustpilotReally good talent, good management, very accommodating to unique needs.
Trustpilot review, Nov 2024
TrustpilotThe competence, expertise and professionalism of Capital Numbers is unequaled.
Wes Mullings, D.D. — IT veteran since 1996, US
Clutch 5.05.0The final result exceeded my expectations.
Paul Koeniger — Owner, Fotostudio Paul Königer, Germany
Trustpilot5.0It’s like having a full-time dedicated employee without the hassles of payroll and HR.
Trustpilot review, Apr 2025
Clutch 5.05.0The page load speed was excellent and was doubled through Capital Numbers.
President — Multitrack Studios, US
Trustpilot5.0They had the time, resources, and team that understood our needs — delivered very quickly and under budget.
RF — Canada
Why clients stay
Four themes run through hundreds of verified reviews — each grounded in what clients actually wrote.
Clients stay for years — some for more than five — on the systems that run their business.
“They had a great staff that could take care of the hardest WordPress problems.”
Jay Slomba — Marketing Manager, Land Mobile Radio Manufacturer - Clutch
Add a team for a launch, shrink to a specialist afterwards — without renegotiating the relationship.
“Communication and availability were impressive.”
Nicolas Bui — CTO, Bright Language LLC, Clutch
Engineers who think about architecture, not just tickets — and keep raising the bar over time.
“They were a flexible, hardworking, and dedicated team.”
Lanre Agbetayo — Marketing Manager, Smiley Movement, Clutch
Every hour is logged in a shared platform — fair rates, visible work, straightforward offboarding.
“Their team puts thought into what we're trying to achieve instead of implementing the first thing we ask for.”
Chris Sharp — Managing Partner, QML, Clutch
Trusted By Global Brands, Growth Companies, And Enterprise Teams
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