Company lists · Data refreshed September 2026
Top 25 Software and services companies based in Kolkata, India
RevenueBase identified 168 software and services companies headquartered in Kolkata, India as of September 2026 and tracks 1,996 professional contacts across them, including 209 with verified work emails. Hyderabad is the largest hub.
This list covers software and services companies headquartered in Kolkata, India, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 21, 2026.
Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.
The 25 largest software and services companies based in Kolkata, India
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 122 contacts → | ||||
Strong evidence “Citytech Software is a Kolkata, India-based premier Software Development and IT Consulting company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 99 contacts → | ||||
Strong evidence “Nimbus Systems is a leading Offshore and Onsite Software Solutions & IT Service provider present in 10 countries, including India, UAE, Europe, and the US.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 86 contacts → | ||||
Indirect evidence “Founded in mid-2011, Webgen Technologies is a technologically advanced, people-centric, ambitious & customer-focused company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 57 contacts → | ||||
Strong evidence “Blue Copper Technologies is a global Information Technology & Software Engineering company committed to creating value and delivering tangible business outcomes for large…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 55 contacts → | ||||
Indirect evidence “Codebuddy is an AI-native engineering studio and reliable technology partner, built around our customers’ needs.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 55 contacts → | ||||
Strong evidence “Exactlly software is a leading software and solutions provider specializing in ERP, HRMS, CRM and PMS.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 43 contacts → | ||||
Indirect evidence “About Surflex Technology Surflex Technology, a global IT company headquartered in India, stands as a beacon of innovation in business consulting, technology services, and product…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 39 contacts → | ||||
Strong evidence “Over the years ADA Software has developed its expertise in the re-engineering and modernization of legacy application software and has delivered projects involving large and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 37 contacts → | ||||
Strong evidence “Relate Infotech is a subsidiary of Relate Software Development Limited based in Ireland, UK & US.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 35 contacts → | ||||
Strong evidence “TwoPiRadian Infotech ("2PiRad") designs & develops software solutions which substantially enhance business productivity and process efficiency through innovative collaboration…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 28 contacts → | ||||
Strong evidence “PDS Infotech, established in the year 2008, is primarily into developing software products in the business application domain.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 27 contacts → | ||||
Indirect evidence “Swastik Infotech is an India based IT company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 25 contacts → | ||||
Strong evidence “Moresco Software is a knowledge company currently providing information technology solutions to help organizations achieve their goals with services ranging from Cloud IT…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 23 contacts → | ||||
Strong evidence “Simayaa Technologies is one of the leading providers of Software & IT Consulting services.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 23 contacts → | ||||
Strong evidence “Xiphos Technology Solutions Private Limited is a global Technology Consulting, Software Development and Services organization, incorporated in 2011.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 20 contacts → | ||||
Strong evidence “Centreax Technologies a software development and consulting organization providing application development, security consulting and IT Managed services to a number of domestic and…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 17 contacts → | ||||
Strong evidence “Kavyant Tech is a software product engineering company, and believes in Quality Developers and Quality Development across all phases of the Software Development Lifecycle.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 12 contacts → | ||||
Indirect evidence “Wit By Bit helps enterprises ease day-to-day operations with fast, elegant, and reliable applications.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 12 contacts → | ||||
Indirect evidence “ORITECH is a young and motivated company full of new ideas and enthusiasm.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 12 contacts → | ||||
Indirect evidence “Oriel Infonet Solutions is a story of constant challenges, teamwork, and dream of success initiated in the year 1995 by our company’s CEO Mr.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 11 contacts → | ||||
Indirect evidence “At dharma.h, we believe in value creation through innovation.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 10 contacts → | ||||
Strong evidence “Webzemini Software established in 2009 and in 2012, we became a Private Limited Company.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 8 contacts → | ||||
Indirect evidence “We work hard to create, perform, deliver, plan, and transform your business as we contribute to the development of the new digital world.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 5 contacts → | ||||
Indirect evidence “Give us an idea and we will deliver exactly what you ideated!” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 5 contacts → | ||||
Indirect evidence “Yeppler Internet Solutions is a StartUp IT Company with footprints in Europe, Asia and US.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
RevenueBase Smart Search
RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: software and services companies. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.
- Strong evidence
- The company's own public description of its business names software and services companies.
- Partial evidence
- Its own public description names part of software and services companies, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name software and services companies. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.
RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.
Showing 25 of 168 software and services companies based in Kolkata, India
See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 209 reachable decision-makers.
Free signup · no credit card
Software and services companies based in Kolkata, India at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured across the whole India list rather than for Kolkata, so it is reported there. Company counts and contact totals on this page are exact for Kolkata, over 168 companies.
How this list was built
Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among software and services companies, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.
- Source
- The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
- What qualifies
- Companies headquartered in Kolkata, India whose own description of what they do matches “software and services companies”. Matching reads each company's description, not its industry code or its name.
- RevenueBase Smart Search
- RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names software and services companies), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
- What we exclude
- Companies whose own description does not clearly place them among software and services companies, and records with no verified work email. Companies headquartered outside Kolkata are excluded even when they keep an office there.
- Match quality
- In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
- Ranking
- Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
- Verification
- Every listed company carries at least one verified work email, 209 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
- Refresh
- This page's figures were pulled from the company graph on September 21, 2026. Lists refresh periodically as the graph is re-checked.
- Corrections
- Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.
Software and services companies by metro in India
- Software and services companies in Hyderabad682
- Software and services companies in Pune639
- Software and services companies in Bangalore461
- Software and services companies in Noida412
- Software and services companies in Chennai391
- Software and services companies in Ahmedabad327
- Software and services companies in Mumbai271
- Software and services companies in New Delhi267
- Software and services companies in Bengaluru243
- Software and services companies in Jaipur172
- Software and services companies in Kolkata168
- Software and services companies in Indore136
- Software and services companies in Surat128
- Software and services companies in Delhi127
- Software and services companies in Coimbatore101
- Software and services companies in Lucknow100
- Software and services companies in Gurgaon94
- Software and services companies in Mohali84
- Software and services companies in Nagpur81
- Software and services companies in Kochi70
- Software and services companies in Bhubaneswar69
- Software and services companies in Gurugram67
- Software and services companies in Vadodara64
- Software and services companies in Trivandrum61
- Software and services companies in Navi Mumbai54
- Software and services companies in Bhopal53
- Software and services companies in Chandigarh50
- Software and services companies in Rajkot44
- Software and services companies in Thane41
- Software and services companies in Nashik39
- Software and services companies in Faridabad38
- Software and services companies in Patna34
- Software and services companies in Visakhapatnam31
- Software and services companies in Ghaziabad30
- Software and services companies in Madurai30
Frequently asked
What is RevenueBase Smart Search?
RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names software and services companies, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.
How many software and services companies are there based in Kolkata, India?
RevenueBase identified 168 software and services companies headquartered in Kolkata, India as of September 2026, matched on each company's own description of what it does rather than its industry code.
What is the largest company on this list?
Citytech Software Microsoft Gold Partner, headquartered in Kolkata, tops this list with the largest team on record.
Which city has the most software and services companies?
Hyderabad leads with 682 headquartered companies, followed by Pune (639) and Bangalore (461).
How do I get contact information for these companies?
A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 209 verified decision-maker contacts tracked across these 168 companies.
How current is this list?
The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 21, 2026.
Ready to reach these companies? Verified emails and direct dials for all 168 software and services companies based in Kolkata, India. Start with a free account, no credit card.
Download this list →Related lists
Software and services companies by geography
- Software and services companies based in Buenos Aires, Argentina
- Software and services companies based in Melbourne, Australia
- Software and services companies based in Sydney, Australia
- Software and services companies based in Belo Horizonte, Brazil
- Software and services companies based in Campinas, Brazil
- Software and services companies based in Curitiba, Brazil
- Software and services companies based in Porto Alegre, Brazil
- Software and services companies based in Rio De Janeiro, Brazil
- Software and services companies based in Sao Paulo, Brazil
- Software and services companies based in Calgary, Canada
- Software and services companies based in Mississauga, Canada
- Software and services companies based in Montreal, Canada
About this data
RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.
More company lists
- All company lists
- Lists by location
- Lists A-Z
- New lists
- Software and services companies based in Buenos Aires, Argentina
- Software and services companies based in Melbourne, Australia
- Software and services companies based in Sydney, Australia
- Software and services companies based in Belo Horizonte, Brazil
- Software and services companies based in Campinas, Brazil
- Software and services companies based in Curitiba, Brazil