Abtin Janinejad, Co-founder & CTO at @pembioVerified Review
Posted on Sep 16, 2021
“Great experience working with them!”
We had a great experience working with CN for our web application.
Capital Numbers
AI-Native Digital Engineering
Certifications
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!
Featured Companies
What clients say
Review Analytics of Capital Numbers
Every review is verified through Goodfirms before it's published.
Review Summary
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.
What reviewers mention most
Jack Casarez, Founder at Elite ResidualVerified Review
Posted on Sep 3, 2021
“This guy is amazing, he does the work very nice.”
He has helped us create a very large project and is exceptional with his communication.
Bill ButlerVerified Review
Posted on May 21, 2021
“Great Experience With Capital Numbers”
I have been working with Capital Numbers for 18 months. I was extremely fortunate to find such a good company to partner with for my development needs! The developer I work with, Ranit, has helped us build and launch our product and helped us grow to over 1,000 customers! We plan to continue to work with Capital Number for many years to come. I was also impressed by their ability to help bring in other resources on a part-time basis to assist on the project. Through the project manager Arghadip I have been able to work with designers and other developers on a part-time basis to help meet the needs of our application
H Sushmitha ShettyVerified Review
Posted on May 14, 2021
“Web Scraping Project Review”
We approached Capital Numbers to help us with the web scraping task to extract data from different retailers. We are glad that we chose Capital Numbers as we had an amazing experience working with them. Project manager Arghadip was very professional , supportive and was attentive to all the requirements. He consistently tracked on the progress and and took the feedbacks. Web scraping developer Maunik was a star of the project .He helped us with the efficient scripts along with the scheduling. He is very Knowledgeable , technically strong and very quick in sorting out the issues. I would like to thank both for helping us in this project.
Ken HallVerified Review
Posted on Feb 16, 2021
“Smooth process and delivery was great.”
The team at Capital Numbers did a great job for us under a high-pressure timeline. They came in on budget and on time once we got the project started.
Lawrence TamVerified Review
Posted on Feb 8, 2021
“great web development agency!”
our business needs were taken care of through the entire process- from the free consultation, project planning, and paid project implementation. We were even given options to choose from to best serve our needs.
Ze Wei WongVerified Review
Posted on Jan 25, 2021
“Very Flexible!”
The team that I worked with from Capital Numbers has superb flexibility in terms of scheduling. The team has always been responsive for any changes and deliver things at speed, without compromising quality! They would also give suggestions based on their experience, which is very valuable for anyone who is not specialized in the field!
diana, COO at at Exclusive Iron Doors LLCVerified Review
Posted on Sep 21, 2020
“Great company!”
I started working with Capital numbers assisted by Sasanka Banerjee first just to do a refresh on our website design and later little by little we have continued to work and improve all aspects of our site to have it at its best! Thank you so much for your help!
JosephVerified Review
Posted on Sep 3, 2020
“Web site deplo”
The project manager that supported my project was absolutely brilliant but the over company structure still need more improvements in term of professionalism, timescale and documentation. However, there are trusted and I would recommend them to anyone
Caleb MciverVerified Review
Posted on Aug 27, 2020
“Spinz Music App and Website Development”
Capital Numbers has been doing an amazing job in developing our music app. It has so many different features but they handle everything extremely well. They are great at communication and are very accommodating. I would highly recommend this company to anyone looking for phenomenal app and website development.
Tien ChiuVerified Review
Posted on Jul 21, 2020
“Did a great job building a Javascript app for me!”
I needed a Javascript app for my online course. They did a great job of designing the UI and building it for me, much faster than my previous developer was able to!
Paul Braun, Owner, at AccuNet Web ServicesVerified Review
Posted on Jul 16, 2020
“A dependable part of our team”
We are very pleased with our partnership with Capital Numbers (CN). After having had several (all) bad experiences with outsourcing, we find CN gets it right. They offer a trial period where you can swap out to a new staff personnel, if the current one is not working out. This is reassuring when getting started, even though we never used it. Another nice feature of working with CN, is that a manager is included with your staff hires, to make sure things are running smoothly. After the first few weeks, the staff and the management is working smoothly for us, we barely notice the manager. Anyone who manages knows this is how it is supposed to be: manage things perfectly, you eventually become almost invisible! The staff we currently use, a developer and a graphic designer are experienced and reliable. Both perform their tasks efficiently and correctly. Even during the most recent cyclone, they found ways to stay in contact, and work as much as humanly possible without regular/reliable electricity or internet services. This shows outstanding integrity, and dedication to getting the work finished. We highly recommend Capital Numbers.
Sathvik Gaddam, Embedded Systems Engineer at at Hall ResearchVerified Review
Posted on Jul 8, 2020
“Greate team and excellent service”
Capital Numbers has a great team. They provided us end to end support on our project. They are always on time and delivered result beyond our expectations.
Nathan BaileyVerified Review
Posted on Jul 8, 2020
“Excellent service”
We first reached out to Capital Numbers over a year ago and have been super impressed by the quality of the work from our assigned expert in Anir. The whole process has been seamless and they have been more than happy to work into our systems. Other companies tend to want you to use their messaging systems or a ticket system but we have Anir working in our Slack and Monday account. Couldn’t recommend Capital Numbers higher.
Nikoan JohnsonVerified Review
Posted on Jul 6, 2020
“Great service providers”
I was looking for a development company to undertake a few fixes on our company site. Capital Numbers and Arghadip (Project Manager) were very helpful seeing the project to completion.
Focus
Service Focus of Capital Numbers
How the team's effort is distributed across services.
Industries Focus
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
Founder
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
Mani Casadona, East Tower, Unit No 8E4, 8th Floor, Action Area 2, New Town, Rajarhat
Kolkata, West Bengal 700156+91-33-6799-2222
India
Kolkata, West Bengal 700156