Overview

About Capital Numbers

Most companies come to us in one of four situations: they need to build something new, they want AI to do real work inside an existing business, a platform they depend on has aged badly, or their own engineering team cannot move fast enough. Capital Numbers is set up for all four.

We are an AI-accelerated digital engineering company, founded in 2012 and publicly listed on the BSE, working with mid-market and enterprise organizations.

Building new products:
Custom software, SaaS platforms, web and mobile applications, and APIs - designed, built, tested and shipped by in-house teams, with UX and QA handled in-house rather than passed around.

Applying AI to the business:
GenAI applications, RAG systems, AI agents, LLM integrations, copilots, and intelligent automation. We also run AI-assisted workflows across our own delivery lifecycle - planning, development, testing, documentation, code review - so we are applying this work to ourselves before we recommend it. Experienced engineers and delivery leaders stay accountable for architecture, security, quality, and business outcomes.

Modernizing platforms that have aged:
Application modernization, cloud modernization across AWS, Azure and GCP, data engineering and analytics, DevOps, Kubernetes, and MLOps. On the enterprise side: Salesforce, Agentforce, Revenue Cloud, Service Cloud, Conga, CPQ, CLM, and enterprise integrations, plus commerce, CMS and enterprise application development.

Adding engineering capacity:
Dedicated specialists, multidisciplinary engineering teams, fixed-scope projects, or discovery and transformation programs. The model is chosen to fit the work and can change as priorities do.

What holds it together

Senior technical oversight on every engagement, structured delivery governance, transparent reporting, and enterprise-grade security practice. Capital Numbers is ISO 9001 and ISO 27001 certified and SOC 2 Type II compliant, with 500+ verified customer reviews.

Consumer Reports, Cinépolis, BD, BASF, Veolia, Savills, DPD Ireland, The Access Group, and Chalhoub Group have worked with us.

Tell us what you are building, modernizing, automating, or scaling, and we will work out the right team and delivery approach with you.

Let’s Connect
Email: [email protected]
Same-day response for qualified inquiries!

What clients say

Review Analytics of Capital Numbers

Every review is verified through Goodfirms before it's published.

4.855 Verified Reviews
Quality4.8
Schedule & Timing4.8
Communication4.8
Overall4.8
Review Summary
Summarized from 55 verified reviews · Updated August 2026
Capital Numbers earns consistent praise for reliable, timely project delivery and strong technical expertise across web development and complex programming work. Clients highlight excellent communication, responsive support, and attentive project management as key strengths. The team is noted for professionalism, affordability, and genuine care in producing quality results that meet client needs. Multiple reviewers describe them as dependable partners easy to work with over extended engagements.
✦ AI-generated summary. May not reflect every review.
Detailed Reviews of Capital Numbers
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What reviewers mention most

Ryan Davies
Ryan Davies, Managing Director at at Like Media GroupVerified Review
Posted on Jul 2, 2020

“Excellent Work”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Mobile App DevelopmentWeb Development

I have used Capital Numbers on a few projects in the couple of years and they have delivered every time. I have a number of projects later this year, which they will be involved in.

Parina Daswaney
Parina Daswaney, Analyst at at Wayfair Verified Review
Posted on Jun 25, 2020

“Review of Capital Numbers ”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Mobile App Development

I had an amazing experience with Capital Numbers. I wanted to completely redesign my website and the team was amazing in helping me achieve this goal They were able to make all the changes and make sure my website was clean, professional looking, pleasing, and easy to use. They were so patient during the process and constantly kept me in the loop. They also charged a fair price for the process. I would highly recommend you to use their service.

EugeniaVerified Review
Posted on Jun 24, 2020

“Capital numbers”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing4.0
Web Development

They been really communicative and always trying to end the task as soon as they can.

Holden Cattoni
Holden Cattoni, Epidemiology Liaison & Project Manager at Asepticys LLCVerified Review
Posted on Jun 23, 2020

“Amazing work and value”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Mobile App DevelopmentWeb DesignIT Services

We had an outstanding experience with capital Numbers. They are very professional, easy to communicate with and very efficient. I would recommend them to anyone looking for a website developer. I look forward ti working with them again in the near future.

Steven Dornonville De La Cour
Steven Dornonville De La Cour, Building the future of marketing at KongVerified Review
Posted on Apr 22, 2020

“Saas Platform”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Software DevelopmentDigital MarketingSocial Media MarketingSEOPPCContent MarketingSEM

I'd cycled through between 15-20 other vendors before running with Capital Numbers. It's been the best decision we've made on our project build - they're extremely professional, easy to deal with, experienced, and reliable. I cant recommend them enough.

Donald A KleinVerified Review
Posted on Mar 12, 2020

“New Features on PromotingPays.com platform”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Mobile App Development

Capital Numbers quickly and efficently implemented, tested, and launched key new features for my website. They are a pleasure to work with.

DeVon Favors
DeVon Favors, System Analyst at Blue Cross and Blue Shield of Illinois, Montana, New Mexico, Oklahoma & TexasVerified Review
Posted on Mar 9, 2020

“Capital Numbers provides Capital Retur”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
E-commerce DevelopmentDigital MarketingSocial Media MarketingSEOPPCContent MarketingSEM

As a startup I struggled with building the company website while working full time and managing family time. Capital numbers team saved me time and money by providing modern technical professionals that delivered an exceptional return on investment.

Bob Norberg
Bob Norberg, Chief Marketing and Product Officer at Cloud Age SolutionsVerified Review
Posted on Feb 13, 2020

“Excellent work for WordPress website redesign”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

Capital Numbers did an excellent job helping us revamp our public website on WordPress . They helped us set it up on WordPress using the Divi theme and helped us with some of the graphics. Capital Numbers was excellent getting this done quickly since we do not have WordPress development resources on staff. They did quality work and it was completed in a timely manner.

Erika Cox
Erika Cox, Marketing Manager at MarketDialVerified Review
Posted on Feb 10, 2020

“A Great Partner! ”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

We worked with Capital Numbers on our website design and development. CN was extremely efficient and provided great designs for us. We worked together for a period of months, and the level of service was always very quick and responsive. We're glad to have found them and worked together with them!

James Morris
James Morris, Co-Founder & COO at StudioSeshVerified Review
Posted on Jan 16, 2020

“Amazing web developer and company to work with!”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Mobile App DevelopmentWeb DevelopmentSoftware Development

Capital Numbers built out StudioSesh’s web platform as we went from mobile to a more enterprise solution focus. They are communicative, fast, creative, reliable, and very affordable! Their account manager and product team even came up with valuable features and product architecture to cover edge cases our team didn’t even think of. They went above and beyond our expectations and would recommend them to anyone as their first choice for an offshore software developer.

Tuanne Mac
Tuanne MacVerified Review
Posted on Dec 20, 2019

“Great standard and quality of delivery ”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

Capital Numbers supplied web dev resource in order to execute a number of website migrations and builds, from AEM to a new CMS. The content was large and multi-lingual - they performed a great job of allocating resource and getting the project out on time

Will Paoletto
Will Paoletto, Founder at Enterprise Cometh, LLC.Verified Review
Posted on Dec 17, 2019

“A superb blog redesign ”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

Capital Numbers redesigned one of my WordPress blogs; they modernized the look and feel. The team also installed the blog, ensured that all my content was moved over, and added several plugins and features that I requested. Their communication was excellent, and the quality of their work was very high.

Marcello Rongione
Marcello RongioneVerified Review
Posted on Nov 26, 2019

“Web Development for Swedish Financial Website”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

Capital Numbers has helped us build a hand-coded and very professional finance website called Lånjakt.se. Everything has worked great, Capital Numbers has always answered my question super fast and the team have an eye for design. I´m looking forward to a long cooperation.

Richard Harper
Richard HarperVerified Review
Posted on Nov 26, 2019

“Great Company to Work With. ”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Digital MarketingE-commerce DevelopmentWeb DevelopmentSocial Media MarketingSEOPPCContent MarketingSEM

I have worked with CN for a number of months and on numerous projects. They have become an extension of my team allowing me to sell additional services I would have been otherwise unable to offer. Their work is always delivered on time and to a high standard. I would highly recommend them

Jade Sholty
Jade Sholty, Client Focused Web Marketing, Design & Development at Water Walk MediaVerified Review
Posted on Nov 26, 2019

“Excellent Work & Attentive to Our Needs”

Overall rating5.0
Quality5.0
Communication5.0
Schedule & Timing5.0
Web Development

This was my first time hiring Capital Numbers. We needed some custom development work done and they did a great job. I don't typically hire outside firms like this but after working with them I definitely have them on my short list for future projects. Thanks for the great work.

Focus

Service Focus of Capital Numbers

How the team's effort is distributed across services.

20%20%20%20%20%

Industries Focus

10%10%10%10%10%10%10%10%10%5%5%

Client Focus

Small Business20%
Medium Business80%

The Positioning

AI Tools & Purpose

The stack the team uses to move faster.

Cursor
code development
Claude
code development
Selected Work

Client Portfolio of Capital Numbers

Where their work concentrates - by industry, budget, and timeline.

Project Industry

Education11%
Insurance11%
Travel11%
Fintech11%
Business Services11%
Advertising & Marketing11%
Transportation & Logistics11%
Healthcare11%
Other11%
Major industry focus
Education

Project Cost

$10001 to $5000044%
$100001 to $50000011%
$0 to $1000044%
Common project cost
$10001 to $50000

Project Timeline

1 to 25 Weeks78%
26 to 50 Weeks11%
51 to 100 Weeks11%
Typical timeline
1 to 25 Weeks

Clients: 11

Consumer ReportsThomson ReutersST EngineeringFidelity PaymentsStoneAcreCinepolisBDBASFSavillsDPDVeolia

Portfolios: 9

Executive Interview

Executive Interview of Capital Numbers

Mukul Gupta
Mukul Gupta
Founder
Visit Profile

Please introduce your company and give a brief about your role within the company?

Capital Numbers is a D&B accredited, ISO 9001 & 27001 certified global software solutions provider. We help CTOs, Software Founders, and Small Businesses get their software, web, or mobile apps done on time, using fully managed teams that integrate seamlessly into their projects. Our clients include Reuters, Conde Nast, AppDetex, Equipo, University of Colorado, Credit Sesame, Grey Digital, and many more. We also partner with Digital Agencies and Development Companies worldwide as their white label development partner. Headquartered in Kolkata, India, we're a company of 400+ specialists with sales offices and legal entities in the US and Australia. We are winners of several awards including - ➊ 2018 - Financial Times "Asia Pacific Top 1000 Companies." ➋ 2017 - Dun and Bradstreet "Leading SME of India." ➌ 2016 - Deloitte "50 Fastest-Growing Tech Companies." I am the Founder and CEO of Capital Numbers and responsible for driving the growth, strategy, and attainment of the Company's vision and mission.

What was the idea behind starting this organization?

Back in 2012, digital operations and technologies were evolving rapidly, and two key trends were emerging. Firstly, the adoption of DevOps & Open Source frameworks was becoming popular within larger and more established organizations. Secondly, browsers and front-end technologies were rapidly evolving to deliver UI/UX experiences that were previously impossible. We scouted the market place. We found that no one was focusing on this trend and hence took the plunge and started Capital Numbers to concentrate on this niche. We specialize in delivering innovative digital experiences using modern tech stack and development practices.

What is your company’s business model–in house team or third party vendors/ outsourcing?

We have a 100% in-house team of 400+ UI/UX Specialists, Developers, Testers, Business Analysts, and Project Managers working at our delivery centers in Kolkata.

How is your business model beneficial from a value addition perspective to the clients compared to other companies' models?

Production costs represent nearly 30% - 50% of any organization’s digital initiative. This money is usually spent on the creation of digital assets for a business and include websites, mobile apps, and software applications. To fulfill this need, the first thing that any organization needs is an efficient workforce that can deliver. There are obvious financial and operational limitations to hiring and retaining local developers and agencies. The hiring of freelancers through online platforms can be a very daunting process even though there are plenty of great freelancers out there. Finding reliable freelancers is challenging, and there are apparent scalability issues. This is where we step in. We offer “In-Demand Skills, On-Demand.” Our business model is adequately equipped to cater to our client’s tech needs “on-demand” so that they don’t have to worry about expensive in-house staffing or getting stuck with unresponsive freelancers. We give our clients access to digital talent that they need when they need it. This helps our clients to decouple the production process from everything else and thus become genuinely strategic and solution agnostic. Our delivery teams, capabilities, and infrastructure are transparent and tailored to our clients’ specific needs. Our model helps clients save 20% to 40% of the costs that they can spend on bigger marketing spends, or savings add straight to their bottom line. To ensure our clients can 100% trust us, we - ● Have Local offices around the USA, Australia, and India ● Focus on quality to ensure that our work is world-class and at par with the industry standards. ● Hire talented people who are treated well and compensated generously. ● Invest heavily in our people, our workplace, our tools, and ensure we are efficient and consistent.

What industries do you generally cater to? Are your customers repetitive?

We cater to a variety of industries and have clients in Non-Profits, Online Publishing, IT & Software Services, Healthcare, Finance, and Legal industries. We have nearly 90% repeat business.

Mention the objectives or the parameters critical in determining the time frame of developing a web app.

The time that your team will need to develop your web application will mostly depend on its complexity. By complexity, we mainly mean the number of custom features you want and how your web application will be used. The simplest version of an application is a website where only one person manages content, no online payments are conducted, and no integrations are needed. An informational website about a company and its services is one such example. The complexity of a custom web application will increase as soon as you want to: ● Have complex workflows ● Allow all users to register and add their content ● Sell online ● Let others buy and sell on your website (C2C) ● Integrate your app with other applications, APIs, etc. ● Localize your website for multiple geographic locations So the time taken for your web app will depend on specific and customized features you would want to incorporate into your website. The development process that your team follows may also have a significant impact on its timeline. For example - ● Do you expect detailed comments or documentation? ● What documents and materials must be produced before development, such as detailed specs, wireframes, etc.? ● Do you plan to follow specific coding standards like PSR or OWASP? ● Are you planning to write unit tests? ● What testing processes are designed before deployment to production? Other organizational factors which may impact the timeline are: ● Familiarity with business domain ● Technology expertise ● Availability of reusable codes

How much effort in terms of time goes into developing the front-end and back-end of a web app?

Very roughly, about 80% of a project’s time is effectively spent on the development of back-end and front-end while the remaining 20% is spent on Testing, QA, Meetings, Documents, and other organizational processes.

What are the key parameters to be considered before selecting the right platform for a web application?

The first point that needs to be kept in mind is the type of web application you’re developing. A tech stack is a toolset for creating a web app, so you need to fully realize what you’re planning to build to pick the appropriate tools. Web projects can be of three types: ● Simple - These web applications are created with the help of out-of-the-box solutions, for instance, CMS software. Landing Pages and simple Online Stores are examples of such simple web apps. ● Mid-level - These apps have more custom functions than simple apps and are built with the help of frameworks, for example, large eCommerce Stores and Enterprise Apps. ● Complex - These web apps have lots of functionalities and integrations. They’re developed with the help of different web development technologies. They may be composed of several programming languages. Social Networking Sites, Healthcare Applications, and Fintech software are some of the examples of complex apps. Then you need to answer the following questions - ● Do you need to process heavy loads like video processing, crawlers, scraping? ● Do you need low latency features like an online chat? ● Which 3rd party integrations are needed? ● How soon you need to go live? Shorter development cycles mean relying on more out-of-the-box solutions or choosing a solution with many 3rd party modules. ● Does the proposed framework has a large developer community? ● Is the proposed platform stable and well documented? ● Does the platform have any security issues? ● Is the platform scalable? ● Are there any licensing costs involved? After these decisions, you can choose an appropriate front-end and back-end framework.

Which platform and technologies do you prefer to use in the development of your web apps?

We usually work with the following - ● CMS - WordPress, Drupal ● eCommerce - Magento, WooCommerce, Shopify ● Back-end - PHP (Laravel, CodeIgniter, Symfony), Python (Django, Flask), RoR, NodeJS, ASP.NET ● Front-end - HTML5, React, Angular, VueJs, TypeScript ● Mobile - iOS, Android, Hybrid ● Database - MySQL, NoSQL, DynamoDB, MongoDB, Firebase, RDS, SQL Server ● Cloud - AWS, GCE, Azure ● DevOps - Jenkins, Docker, Kubernetes, Nagios, NewRelic

Do you offer website design templates or customized website design, and do you have a responsive website design?

We offer a 100% custom web design service based on client needs, and these are typically responsive and tested across several browsers and different resolutions. In some cases, we do customize website templates purchased by the client from ThemeForest or other similar websites.

Which Content Management System do you prefer to use (Wordpress, Joomla, Drupal, etc)?

WordPress and Drupal. Limited availability is there on Joomla.

Do you provide website maintenance services?

Yes.

What are the key factors that you consider before deciding the cost of a web application?

The estimated effort required for web application is the main factor determining the cost of web development. The estimated effort, in turn, depends on the complexity and various other factors, as mentioned above.

What kind of payment structure do you follow to bill your clients? Is it Pay per Feature, Fixed Cost, Pay per Milestone (could be in phases, months, versions etc.)

This depends on the type of engagement model. We currently offer the following two models: Fixed Price - It’s a perfect collaboration type for small short-term projects with a defined end product in mind. We provide an upfront detailed estimation along with a delivery schedule. We are also fully responsible for completing the project and meeting all the client needs within the agreed timeframe. There is an advance deposit of 20% - 50% depending on the project size, and the remaining payment is milestone-based, which is discussed and mutually agreed to upfront. Dedicated team - This type of collaboration means that a client gets a team of developers that work exclusively for them for 8 hours a day, 20 days a month. Clients can personally interview and approve each candidate, which means they will be aware of what expertise and knowledge they possess. The client makes a monthly payment based on the number of people working for them. There is an advance deposit for 15 - 30 days of service, and then the client simply makes a payment on a specific date fixed for every month. Risk-Free trials are also offered for up to two weeks.

Do you take in projects which meet your basic budget requirement? If yes, what is the minimum requirement? If no, on what minimum budget you have worked for?

Yes. We have a minimum budget of $5000, but we do work on smaller projects in case it is an ongoing relationship, for example, in case of agencies or software companies subcontracting work to us.

What is the price range (min and max) of the projects that you catered to in 2018?

$5000 - $400,000.

Kindly share your feedback on how Goodfirms has been doing so far in increasing your visibility among potential clients.

We have only recently started actively promoting ourselves on Goodfirms, and it has been steadily giving us traffic and leads.

Where we are

Locations (1)

Offices where Capital Numbers operates.

Headquarter
India

India

Mani Casadona, East Tower, Unit No 8E4, 8th Floor, Action Area 2, New Town, Rajarhat
Kolkata, West Bengal 700156
+91-33-6799-2222