IT companies in Kolkata: list with contact details

Where Kolkata's IT, software and computer businesses are, the free sources, and a list with phone numbers and emails.

By Shyam Sunder · Published 17 October 2026 · 6 min read

IT companies in Kolkata: where they are, and who this list is for

Most searches for IT companies in Kolkata come from people looking for a job, and for them the companies' careers pages and the job portals are the right place to start. This guide is for a different reader: a business that wants Kolkata's software, IT service and computer firms as customers or partners, or a company choosing an IT vendor in the city. Our Kolkata IT list, with phone numbers and email addresses, is described further down.

Kolkata's tech trade sits in a few distinct places, and each buys in its own way:

Salt Lake Sector V: the city's oldest IT district, in Bidhannagar on the eastern edge, where office blocks hold large service companies, back offices and a long tail of small software firms.
New Town (Rajarhat): the planned township beyond Salt Lake, laid out in Action Areas, with IT parks, special economic zones and newer campuses beside the housing estates.
The EM Bypass and south Kolkata: offices along the Eastern Metropolitan Bypass, and small development shops and web studios in neighbourhoods such as Jadavpur, Tollygunge and Garia.
Central Kolkata: sales offices of IT firms around Park Street and Camac Street, and the computer and electronics dealers of Chandni Chowk.

Many Kolkata firms write software for customers in eastern India, such as hospitals, distributors, tea and jute companies and government departments, as well as for clients abroad. A small hospital-software firm in Salt Lake buys very differently from a captive centre in New Town.

Free sources on Kolkata IT firms, and where they stop

STPI's Kolkata centre registers software exporters under its scheme. Being on its rolls shows a firm earns from abroad, not who runs its office or signs its purchase orders.
Webel, the state's electronics development corporation, and the state IT department describe the IT parks and policies in Sector V and New Town. That is a map of buildings, not a list of tenants with phone numbers.
NASSCOM and the city's chambers, such as the Bengal Chamber and the Indian Chamber of Commerce, hold technology events where you can meet founders in person. Member details stay with members.
MCA master data and the GST search confirm a firm's legal name, status and registered office, one firm at a time. Our guide to company and GST look-ups explains both. Many small software firms are proprietorships and never appear in company records.
Old PDFs: "Kolkata IT companies" files still circulate, but most were typed up years ago and are full of 033 landlines that no longer answer.

Our list of IT companies in Kolkata

The IT & Software Companies in Kolkata file holds 776 businesses. 97% have an email address and 38% a mobile number, while 64% give an office landline; 73% name a contact person and 39% give that person's designation. Email is the strongest column in this file, so write first and phone a day or two later. Sixty real rows are on the list page with a free Excel sample, and a city list costs ₹499.

The file mixes several kinds of firm. Its biggest categories today:

Software Development: 231
Computer Software Developers for Hospital: 151
Hardware: 42
Software: 19
Computer Software Developers in Java: 16

Hardware dealers and IT-enabled service firms sit beside the developers, so sort on the Category column and keep only the kind of firm you sell to.

Few rows fill the area column, so split the city by searching the address column for "Sector V", "Salt Lake" or "New Town", or sort on the PIN code, which 78% of rows carry.

Treat any list as a starting point. Small firms move offices and staff change numbers, so call twenty rows from your segment before you plan a full campaign, and note what has changed.

Other Kolkata lists around the IT trade

Web agencies, computer dealers and the people who work inside tech offices, each as its own list:

The IT & Software Companies in West Bengal list adds the firms that gave another town of the state as their address.

For the whole country, the All-India IT list runs to 73,762 businesses and is sold as bulk data at ₹1,999. Every other list for the city is on the Kolkata page.

Who sells to Kolkata's IT firms

Staff transport and cab operators for Sector V and New Town, where many teams work evening and night shifts for clients abroad.
Facility management, housekeeping, security and canteen contractors for the larger offices, and interior firms fitting out new floors in New Town.
Coworking and managed office providers for start-ups and small teams.
Laptop rental, annual maintenance, networking, CCTV and power backup firms. Pre-monsoon storms and heavy monsoon rain make uptime a real worry for small offices.
Recruiters and training institutes placing engineers from Jadavpur University and the many engineering colleges around the city.
CA firms handling GST on software exports, payroll and audits, and banks offering export and forex accounts.

Partnering is the other use. Some smaller Kolkata software houses take on subcontracted or white-label work, and a list sorted by speciality is a quick way to find a development partner for hospital, ERP or mobile projects.

How to approach IT companies in Kolkata

Split the file by district. Sector V and New Town sit next to each other on the east side and make one day's visits; central and south Kolkata make another. Sector V has its own station on the Green Line of the metro.
Find who decides. In a twelve-person firm in Salt Lake the founder buys everything. In a large office, admin buys services, the IT manager buys hardware and HR buys hiring.
Keep the opener short. For example: "Nomoshkar, this is Arindam from a facility services firm in Salt Lake. We run housekeeping and pantry services for four software offices in Sector V. Who handles admin contracts at your office?" Our cold calling tips cover what to say next.
Mind the calendar. The city slows down for Durga Puja in September or October, when many offices close for several days. Book meetings before or after Puja week, and call late in the morning, Tuesday to Thursday.
Stay inside the rules. Read the DND rules before promotional calls or SMS, and follow our cold email templates for the first email.

Questions people ask

Which area of Kolkata has the most IT companies?

Salt Lake Sector V and New Town hold most of the large offices. Small firms are spread across the city, from Dum Dum in the north to Garia in the south. For the city's other industries, see our list of companies in Kolkata.

Are Salt Lake and New Town firms in the Kolkata list?

Yes, where the firm gives Kolkata as its city, which most do, even though Sector V falls under Bidhannagar and New Town has its own development authority. Rows follow the address each business gives, so a firm that wrote another town sits in the West Bengal list instead.

How do I choose a software company in Kolkata for my project?

Shortlist five or six firms by category and area, ask each for two projects like yours and a client you may call, and check its GST registration and company status. Agree milestones, payment stages and who owns the source code in writing before you pay an advance.

How many IT companies are there in Kolkata?

No register gives one figure, because many small firms are proprietorships that appear in no company record. Our Kolkata file lists 776 IT, software and computer businesses.