Company lists · Data refreshed September 2026

Top 25 Iot software development services based in Kolkata, India

Name: Iot software development services based in Kolkata, India
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 147 companies tracked

RevenueBase identified 147 iot software development services headquartered in Kolkata, India as of September 2026 and tracks 3,183 professional contacts across them, including 726 with verified work emails. Across India, Pune is the largest hub for this category (462 companies); Kolkata has 147.

This list covers iot software development services 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 28, 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 28, 2026 86% judged on-target in blind review

147Companies

3,183Contacts tracked

726Verified emails

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The 25 largest iot software development services based in Kolkata, India

Ranked by team size

Top 25 of 147 iot software development services based in Kolkata, India, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to iot software development services: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Capital Numbers	Strong evidence	Kolkata, IndiaHQ checked Sep 28, 2026	501-1,000	641 contacts →
	Strong evidence “Capital Numbers – Transforming Businesses with AI, Cloud & Digital Engineering BSE-Listed \| 500+ Experts \| AI, Cloud, Data, System Integration & Custom Software Development We…” Source: RevenueBase Database · checked Sep 28, 2026
2	Stesalit Systems LTD	Partial evidence	Kolkata, IndiaHQ checked Sep 28, 2026	501-1,000	335 contacts →
	Partial evidence “Stesalit Systems Ltd has its core focus on the technology triad of Location Intelligence – IoT (Internet of Things) – Analytics to enable its clients know in real time all the…” Source: RevenueBase Database · checked Sep 28, 2026
3	Brainium Information Technologies	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	201-500	310 contacts →
	Indirect evidence “Brainium Information Technologies is an AI-First technology partner helping businesses build, scale, and modernize digital products faster with intelligence built in.” Source: RevenueBase Database · checked Sep 28, 2026
4	Sentientgeeks	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	51-200	229 contacts →
	Indirect evidence “Are you looking for professional & experienced offshore developers for promoting your brands digitally?” Source: RevenueBase Database · checked Sep 28, 2026
5	Nature Technologies PVT LTD	Strong evidence	Kolkata, IndiaHQ checked Sep 28, 2026	51-200	124 contacts →
	Strong evidence “About Us Founded in 2005 and redefined in 2007, Nature Technologies Pvt Ltd stands today as a global beacon of innovation in software development, headquartered in Kolkata, India.” Source: RevenueBase Database · checked Sep 28, 2026
6	Webgen Technologies	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	51-200	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 28, 2026
7	Esoft Technology Solutions	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	n/a	74 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
8	Achievex Solutions Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	51-200	59 contacts →
	Indirect evidence “AchieveX Solutions is a new-age company under the Startup India flagship that solely believes in entrenching innovation to your ideas and turning them into reality.” Source: RevenueBase Database · checked Sep 28, 2026
9	Objectsol Technologies PVT LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	51-200	53 contacts →
	Indirect evidence “For over 15 years, ObjectSol Technologies has been a trusted partner, transforming businesses across BFSI, Healthcare, Retail, Transportation, ISP, Utilities, Fintech, Hospitality…” Source: RevenueBase Database · checked Sep 28, 2026
10	Ogma Conceptions	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	49 contacts →
	Indirect evidence “Welcome to Ogma Conception, where innovation meets digital excellence!” Source: RevenueBase Database · checked Sep 28, 2026
11	Growth Loops Technology	Strong evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	45 contacts →
	Strong evidence “Growth Loops Technology is a leading software development agency that provides end-to-end solutions to help businesses achieve their digital goals.” Source: RevenueBase Database · checked Sep 28, 2026
12	Keyline Digitech PVT LTD	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	41 contacts →
	Indirect evidence “Keyline Digitech is a trusted IT solutions partner with over 20 years of experience, empowering businesses to thrive in the digital world.” Source: RevenueBase Database · checked Sep 28, 2026
13	Kotai Electronics Pvt. LTD	Strong evidence	Kolkata, IndiaHQ checked Sep 28, 2026	51-200	38 contacts →
	Strong evidence “We are a custom software development company, specialized in IoT and Enterprise solutions.” Source: RevenueBase Database · checked Sep 28, 2026
14	Azure Software Pvt. LTD	Partial evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	28 contacts →
	Partial evidence “Azure Software Pvt.” Source: RevenueBase Database · checked Sep 28, 2026
15	Vyoma Innovus Global Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	24 contacts →
	Indirect evidence “Vyoma Innovus Global (VIG) Private Limited is a Kolkata based IT company with vision and mission to provide smart IT solution to the society.” Source: RevenueBase Database · checked Sep 28, 2026
16	Openweb Solutions	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	23 contacts →
	Indirect evidence “Openweb Solutions is a technology service provider, providing analytics, cloud, web and mobility services to organizations across the globe.” Source: RevenueBase Database · checked Sep 28, 2026
17	Nick IT Solutions Pvt. LTD	Partial evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	22 contacts →
	Partial evidence “IOT \| Enterprise Mobility \| Mobile Payments \| RFID We provide you honest advice to automate your business and bring better ROI to your business.” Source: RevenueBase Database · checked Sep 28, 2026
18	Eegrab	Partial evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	19 contacts →
	Partial evidence “EEGRAB is a leading provider of IoT and IIoT solutions, empowering industries to achieve digital transformation through innovative and scalable technologies.” Source: RevenueBase Database · checked Sep 28, 2026
19	Shanvia Tech Solutions PVT LTD	Strong evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	19 contacts →
	Strong evidence “We (M/S Shanvia Tech Solutions Pvt Ltd) house a team of experts (proficient in custom Web Application Development, Mobile Apps Development, AI Development, Software Development…” Source: RevenueBase Database · checked Sep 28, 2026
20	Wift CAP Solutions PVT LTD	Partial evidence	Kolkata, IndiaHQ checked Sep 28, 2026	51-200	18 contacts →
	Partial evidence “Wift Cap Solutions Pvt Ltd is a software services company based in Kolkata, India.” Source: RevenueBase Database · checked Sep 28, 2026
21	Aeonix Research And Innovations	Partial evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	16 contacts →
	Partial evidence “Aeonix Research & Innovations LLP builds end-to-end solutions in IoT, AI, Robotics and SaaS for governments, smart cities and enterprises.” Source: RevenueBase Database · checked Sep 28, 2026
22	Primawave Software Private Limited	Partial evidence	Kolkata, IndiaHQ checked Sep 28, 2026	501-1,000	15 contacts →
	Partial evidence “Welcome to Primawave Software Private Limited, where we unleash the power of cutting-edge IT solutions to fuel your business's growth, efficiency, and success in the digital era.” Source: RevenueBase Database · checked Sep 28, 2026
23	Cattlefield Technologies	Strong evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	15 contacts →
	Strong evidence “cattlefield™ (Cattlefield Technologies India Private Limited) a fast growing company with divisions of Software Development, Information and Cyber Security, Training and Skill…” Source: RevenueBase Database · checked Sep 28, 2026
24	Boenci Solutions Private Limited	Indirect evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	15 contacts →
	Indirect evidence “We are market and technology driven company.” Source: RevenueBase Database · checked Sep 28, 2026
25	Coding Objects Private Limited Copl	Strong evidence	Kolkata, IndiaHQ checked Sep 28, 2026	11-50	14 contacts →
	Strong evidence “Coding Objects Private Limited is a pioneering software development and analytics company specializing in Deep AI-powered industrial automation.” Source: RevenueBase Database · checked Sep 28, 2026

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: iot software development services. 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 iot software development services.
Partial evidence: Its own public description names part of iot software development services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name iot software development services. 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 147 iot software development services based in Kolkata, India

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Iot software development services based in Kolkata, India at a glance

As of Sep 28, 2026

22.8%Verified-email coverage

21.7Average contacts per company

11-50Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 147 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 iot software development services, 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 “iot software development services”. 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 iot software development services), 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 iot software development services, 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, 726 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 28, 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.

Iot software development services by metro in India

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 iot software development services, 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 iot software development services are there based in Kolkata, India?

RevenueBase identified 147 iot software development services 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?

Capital Numbers, headquartered in Kolkata, tops this list with the largest team on record.

Which city in India has the most iot software development services?

Pune leads India with 462 headquartered companies, followed by Ahmedabad (398) and Hyderabad (378). Kolkata has 147.

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 726 verified decision-maker contacts tracked across these 147 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 28, 2026.

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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.