Lookalikes · Data refreshed October 2026

25 Johnson O'connor lookalikes

Compiled by the RevenueBase Data Team Data refreshed Oct 31, 2026 6412 matching companies

Looking for Johnson O'connor lookalikes, Johnson O'connor competitors or Johnson O'connor alternatives? The RevenueBase company graph holds 6412 companies that do what Johnson O'connor does, matched at 85%+ measured description similarity (RevenueBase, October 2026). The 25 largest are ranked below by team size; across all 6412 matches RevenueBase tracks 795,635 professional contacts, including 269,992 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 Johnson O'connor and ranks them by company size. Data current as of October 31, 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 Oct 31, 2026 Match quality audited by blind human judging

Reference company

Johnson O'connor

“Founded in 1945, Johnson O’Connor has grown to become one of the preeminent accounting and consulting firms in the Greater Boston area.”

51-200Employees

87Contacts tracked

77Verified emails

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The 25 largest Johnson O'connor competitors and alternatives

Ranked by team size

Top 25 of 6412 companies matching Johnson O'connor at 85%+ description similarity, ranked by team size. Similarity is each company's measured match to Johnson O'connor (100% = identical). Data refreshed Oct 31, 2026.
#	Company	HQ	Employees	Similarity	Verified emails
1	MNP	Calgary, CA	5,001-10,000	90%	5,266 contacts →
2	BDO UK	London, GB	5,001-10,000	88%	4,098 contacts →
3	SGV & CO	Makati City National, PH	5,001-10,000	86%	242 contacts →
4	Kpmg France	La Defense, FR	10001+	89%	517 contacts →
5	Grant Thornton UK	London, GB	5,001-10,000	87%	1 contacts →
6	BDO Canada	Toronto, CA	1,001-5,000	86%	2,793 contacts →
7	RSM	London, GB	10001+	88%	64 contacts →
8	PWC Luxembourg	Luxembourg, LU	1,001-5,000	88%	1,458 contacts →
9	BDO In Australia	Brisbane, AU	1,001-5,000	86%	1,783 contacts →
10	Kpmg Philippines	Makati City Manila, PH	1,001-5,000	86%	94 contacts →
11	PWC Sweden	SE	1,001-5,000	87%	117 contacts →
12	BDO South Africa	Parktown Johannesburg, ZA	1,001-5,000	88%	1,107 contacts →
13	Grant Thornton Australia	Sydney, AU	1,001-5,000	86%	497 contacts →
14	BDO In Indonesia	Dki Jakarta, ID	501-1,000	85%	569 contacts →
15	Kpmg Poland	Warszawa, PL	1,001-5,000	87%	842 contacts →
16	Grant Thornton Sweden	Stockholm, SE	1,001-5,000	86%	1,051 contacts →
17	BDO Germany	Hamburg, DE	1,001-5,000	90%	878 contacts →
18	Beierholm	Aalborg North, DK	1,001-5,000	86%	35 contacts →
19	Kpmg Portugal	PT	1,001-5,000	86%	612 contacts →
20	Crowe UK	London, GB	1,001-5,000	87%	8 contacts →
21	Grant Thornton Greece	Athens, GR	1,001-5,000	87%	221 contacts →
22	BDO Norge	Oslo, NO	1,001-5,000	88%	629 contacts →
23	WIPRO	Valencia, ES	n/a	85%	1 contacts →
24	PWC Czech Republic	Prague, CZ	1,001-5,000	85%	570 contacts →
25	BDO Belgium	Zaventem, BE	1,001-5,000	88%	644 contacts →

Showing the 25 largest of 6412 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 Johnson O'connor, 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 Johnson O'connor 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 October 31, 2026. Lists refresh periodically as the graph is re-checked.

Frequently asked

What are Johnson O'connor lookalikes?

Johnson O'connor lookalikes are companies that closely resemble what Johnson O'connor 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 Johnson O'connor shown as a percentage.

What companies are similar to Johnson O'connor?

The largest companies similar to Johnson O'connor are MNP, BDO UK, SGV & CO and Kpmg France. The table above shows the 25 largest of the 6412 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 Johnson O'connor'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 269,992 verified emails and direct dials tracked across all 6412 matched companies.

Who are Johnson O'connor's biggest competitors?

The largest Johnson O'connor competitors by measured business-description similarity are MNP, BDO UK, SGV & CO and Kpmg France. Every company here does what Johnson O'connor does at 85%+ similarity, ranked by team size.

What are the best Johnson O'connor alternatives?

The closest Johnson O'connor alternatives are the companies whose own business descriptions match Johnson O'connor'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 October 31, 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.