Lookalikes · Data refreshed November 2026

25 ISG lookalikes

Compiled by the RevenueBase Data Team Data refreshed Nov 5, 2026 3687 matching companies

Looking for ISG lookalikes, ISG competitors or ISG alternatives? The RevenueBase company graph holds 3687 companies that do what ISG does, matched at 85%+ measured description similarity (RevenueBase, November 2026). The 25 largest are ranked below by team size; across all 3687 matches RevenueBase tracks 78,162 professional contacts, including 16,498 with verified work emails.

Similarity is measured on what companies actually do, from their business descriptions rather than industry codes, and is shown per row as a percentage. This page keeps only companies at 85%+ measured similarity to ISG and ranks them by company size. Data current as of November 5, 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 Similarity shown on every row Refreshed Nov 5, 2026 Match quality audited by blind human judging

Reference company

ISG

“ISG is an independently-owned, full-service market research firm based in the Twin Cities.”

11-50Employees

74Contacts tracked

5Verified emails

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The 25 largest ISG competitors and alternatives

Ranked by team size

Top 25 of 3687 companies matching ISG at 85%+ description similarity, ranked by team size. Similarity is each company's measured match to ISG (100% = identical). Data refreshed Nov 5, 2026.
#	Company	HQ	Employees	Similarity	Verified emails
1	IPSOS	Paris, FR	10001+	87%	4,288 contacts →
2	GD Research Center Pvt. LTD	Hyderabad, IN	1,001-5,000	86%	71 contacts →
3	SAGO	Iselin, US	1,001-5,000	87%	482 contacts →
4	Norstat	Kobenhavn Kobenhavn, DK	501-1,000	86%	51 contacts →
5	Hansa Research Group	Bangalore, IN	501-1,000	89%	130 contacts →
6	Market Xcel	Singapore, SG	501-1,000	94%	97 contacts →
7	Unimrkt Research	Great Neck, US	501-1,000	87%	117 contacts →
8	High Beam Global HBG	Gurugram, IN	51-200	89%	71 contacts →
9	Allied Market Research	Wilmington, US	501-1,000	90%	28 contacts →
10	Savanta	New York, US	501-1,000	86%	292 contacts →
11	Azure Knowledge Corporation	Palo Alto, US	1,001-5,000	86%	2 contacts →
12	INJ Partners	Kowloon, HK	501-1,000	88%	103 contacts →
13	Ronin International	London, GB	51-200	86%	86 contacts →
14	Plus 94 Research	Johannesburg, ZA	1,001-5,000	87%	48 contacts →
15	Macromill, INC	Jing, JP	1,001-5,000	86%	60 contacts →
16	AWE Research	n/a	201-500	86%	153 contacts →
17	Schlesinger Group	Atlanta, US	1,001-5,000	86%	38 contacts →
18	Markelytics Solutions	IN	501-1,000	91%	46 contacts →
19	Mindforce Research	London, GB	201-500	85%	99 contacts →
20	Radius	New York, US	51-200	85%	136 contacts →
21	Actionedge Research Services LLP	Ahmedabad, IN	51-200	93%	55 contacts →
22	Blackstone Group	Chicago, US	51-200	91%	7 contacts →
23	C&c Market Research, INC	San Antonio, US	501-1,000	86%	19 contacts →
24	Starlight Analytics	New York, US	n/a	87%	1 contacts →
25	CID Gallup	CR	201-500	89%	28 contacts →

Showing the 25 largest of 3687 similar companies

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How similarity works

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.
Matching: Companies are matched on what they actually do, as described in their own business descriptions, never on shared industry codes. The list keeps only matches at 85%+ measured similarity to ISG, and match quality is audited by blind human judging. Read the full methodology.
Ranking: Team size, largest first, among the matched companies: companies are ordered by the number of professionals RevenueBase tracks at each one. Each row also shows its measured similarity to ISG as a percentage.
Verification: Contact records re-verify on a rolling cadence rather than being scraped once and left to decay; each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on November 5, 2026. Lists refresh periodically as the graph is re-checked.

Frequently asked

What are ISG lookalikes?

ISG lookalikes are companies that closely resemble what ISG does and sells, based on each company's own business description. The table above ranks the closest matches by company size, with each company's similarity to ISG shown as a percentage.

What companies are similar to ISG?

The largest companies similar to ISG are IPSOS, GD Research Center Pvt. LTD, SAGO and Norstat. The table above shows the 25 largest of the 3687 matched companies, with each row's similarity shown as a percentage.

How is similarity measured?

Similarity scores how closely a company's business, as described in its own words, matches ISG's, shown as a percentage (100% = an identical description). The list keeps companies at 85% or above and ranks them by team size.

How do I get contacts at these companies?

A free RevenueBase account lets you run this exact search and work the top matches, verified emails and direct dials included. Upgrading unlocks the 16,498 verified emails and direct dials tracked across all 3687 matched companies.

Who are ISG's biggest competitors?

The largest ISG competitors by measured business-description similarity are IPSOS, GD Research Center Pvt. LTD, SAGO and Norstat. Every company here does what ISG does at 85%+ similarity, ranked by team size.

What are the best ISG alternatives?

The closest ISG alternatives are the companies whose own business descriptions match ISG's most closely, shown above with each one's similarity as a percentage and ranked by team size.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on November 5, 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.