Company lists · Data refreshed September 2026

Top 25 Advisory and outsourcing services based in Wilmington, United States

Name: Advisory and outsourcing services based in Wilmington, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 23, 2026 140 companies tracked

RevenueBase identified 140 advisory and outsourcing services headquartered in Wilmington, United States as of September 2026 and tracks 3,448 professional contacts across them, including 1,566 with verified work emails. New York is the largest hub.

This list covers advisory and outsourcing services headquartered in Wilmington, United States, 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 23, 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 23, 2026 86% judged on-target in blind review

140Companies

3,448Contacts tracked

1,566Verified emails

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The 25 largest advisory and outsourcing services based in Wilmington, United States

Ranked by team size

Top 25 of 140 advisory and outsourcing services based in Wilmington, United States, ranked by team size, largest first. Data refreshed Sep 23, 2026. RevenueBase Smart Search rates how each company's information relates to advisory and outsourcing 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	The Siegfried Group	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	1,001-5,000	1,573 contacts →
	Indirect evidence “We help CFOs and executive teams clarify what matters most, then deliver elite financial talent to make it happen.” Source: RevenueBase Database · checked Sep 23, 2026
2	Intello Group, INC	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	201-500	127 contacts →
	Indirect evidence “We provide IT Consulting across a number of specialty areas and industry verticals, establishing success in both private enterprise and the public sector.” Source: RevenueBase Database · checked Sep 23, 2026
3	Belfint, Lyons & Shuman, P.A	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	102 contacts →
	Indirect evidence “Belfint, Lyons & Shuman (BLS) is an accounting firm dedicated to serving businesses, nonprofits, estates, and trusts in Delaware, Pennsylvania and beyond.” Source: RevenueBase Database · checked Sep 23, 2026
4	IMAP	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	201-500	99 contacts →
	Partial evidence “IMAP has been guiding business owners and investors in M&A and corporate finance advisory transactions since 1973.” Source: RevenueBase Database · checked Sep 23, 2026
5	Bolsterbiz	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	94 contacts →
	Partial evidence “BolsterBiz is a leading provider of comprehensive offshoring and outsourcing services, designed to drive business growth, optimize operational efficiency, and ensure long-term…” Source: RevenueBase Database · checked Sep 23, 2026
6	Breakwater Accounting Advisory Corp	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	66 contacts →
	Indirect evidence “We’re financial and back office experts who understand that every business is unique.” Source: RevenueBase Database · checked Sep 23, 2026
7	Paradiso AI Consulting	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	59 contacts →
	Indirect evidence “Paradiso AI Consulting is the AI consulting division of Paradiso Solutions - a technology company with the DNA of Silicon Valley and a global presence.” Source: RevenueBase Database · checked Sep 23, 2026
8	SHJ International	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	53 contacts →
	Indirect evidence “WE ARE SHJ INTERNATIONAL “Changing the very Definitions of Great Service.” SHJ International is a venture of hard working and exponentially talented personnel with a diverse range…” Source: RevenueBase Database · checked Sep 23, 2026
9	Alokab Consulting	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	42 contacts →
	Indirect evidence “Alokab is a leading consulting company.” Source: RevenueBase Database · checked Sep 23, 2026
10	Gunnip & Company Cpas	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	40 contacts →
	Indirect evidence “Gunnip & Company LLP, Certified Public Accountants and Consultants, is a Delaware firm serving Delaware, Pennsylvania, New Jersey and Maryland with highly personalized and…” Source: RevenueBase Database · checked Sep 23, 2026
11	JARS	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	11-50	34 contacts →
	Partial evidence “JARS is a multi-disciplinary consulting firm that supports businesses with complete financial and legal advisory and HNIs with wealth and treasury management.” Source: RevenueBase Database · checked Sep 23, 2026
12	Accroid INC	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	33 contacts →
	Indirect evidence “Accroid Inc is a nationwide employment and service provider committed to enabling individuals.” Source: RevenueBase Database · checked Sep 23, 2026
13	Versalign INC	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	29 contacts →
	Indirect evidence “Versalign delivers effective, innovative technology and consultative solutions.” Source: RevenueBase Database · checked Sep 23, 2026
14	Management Outsourcing Services	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	23 contacts →
	Partial evidence “Management Outsourcing Services is a back office multinational company which decentralizes administrative, financial, accounting and marketing activities for entities of all types…” Source: RevenueBase Database · checked Sep 23, 2026
15	Riversedge Advisors, LLC	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	11-50	22 contacts →
	Partial evidence “RiversEdge Advisors is an independent, award-winning Investment advisory firm founded in Wilmington, DE in 2012.” Source: RevenueBase Database · checked Sep 23, 2026
16	Market Edge	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	11-50	21 contacts →
	Indirect evidence “Market Edge provides consulting and management development services in the areas of strategy, marketing, sales and innovation.” Source: RevenueBase Database · checked Sep 23, 2026
17	RED Bike Advisors	Partial evidence	Wilmington, NC, United StatesHQ checked Sep 23, 2026	11-50	21 contacts →
	Partial evidence “Red Bike Advisors is on a mission to help small business owners simplify, streamline, and save with “Know Your Numbers” financial and tax insights.” Source: RevenueBase Database · checked Sep 23, 2026
18	WGA Advisors, INC	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	1,001-5,000	18 contacts →
	Partial evidence “At WGA Advisors, we help organizations grow, inspire, and achieve results that matter.” Source: RevenueBase Database · checked Sep 23, 2026
19	Corient Business Solutions INC	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	201-500	15 contacts →
	Partial evidence “Corient Business Solutions LLC is a leading Outsourcing Company based out of Delaware, United States.” Source: RevenueBase Database · checked Sep 23, 2026
20	Even & ODD Minds LLC	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	51-200	13 contacts →
	Partial evidence “Even & Odd Minds is a talent-driven consulting firm providing individual consultants, project teams, and strategic outsourcing services to clients in a wide range of industries.” Source: RevenueBase Database · checked Sep 23, 2026
21	Wheeler Wolfenden And Dwares, PAS	Indirect evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	11-50	11 contacts →
	Indirect evidence “At Wheeler Wolfenden and Dwares, CPAs, our first priority is you.” Source: RevenueBase Database · checked Sep 23, 2026
22	Williams Houck & Company	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	11-50	11 contacts →
	Partial evidence “Williams Humphreys & Company (WHC) is a full-service tax accounting and tax advisory firm that is redefining the roles accounting professionals play in supporting their clients’…” Source: RevenueBase Database · checked Sep 23, 2026
23	R.A. Cohen Consulting	Indirect evidence	Wilmington, NC, United StatesHQ checked Sep 23, 2026	1-10	11 contacts →
	Indirect evidence “R.A.” Source: RevenueBase Database · checked Sep 23, 2026
24	Masonboro Advisors	Partial evidence	Wilmington, NC, United StatesHQ checked Sep 23, 2026	1-10	9 contacts →
	Partial evidence “With 140+ years of combined experience, our team at Masonboro Advisors is ready to tackle your financial needs at every stage of life.” Source: RevenueBase Database · checked Sep 23, 2026
25	Montesino Associates	Partial evidence	Wilmington, DE, United StatesHQ checked Sep 23, 2026	11-50	9 contacts →
	Partial evidence “Montesino Associates is a consultancy and advisory firm, headquartered in Wilmington, Delaware and an operational presence in the United States, Latin America, United Kingdom…” Source: RevenueBase Database · checked Sep 23, 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: advisory and outsourcing 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 advisory and outsourcing services.
Partial evidence: Its own public description names part of advisory and outsourcing services, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name advisory and outsourcing 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 140 advisory and outsourcing services based in Wilmington, United States

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Advisory and outsourcing services based in Wilmington, United States at a glance

As of Sep 23, 2026

45.4%Verified-email coverage

24.6Average contacts per company

11-50Median size (employees)

1302.9%Largest-city concentration · New York

Sep 23, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured across the whole United States list rather than for Wilmington, so it is reported there. Company counts and contact totals on this page are exact for Wilmington, over 140 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 advisory and outsourcing 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 Wilmington, United States whose own description of what they do matches “advisory and outsourcing 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 advisory and outsourcing 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 advisory and outsourcing services, and records with no verified work email. Companies headquartered outside Wilmington 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, 1,566 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 23, 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.

Advisory and outsourcing services by metro in the United States

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 advisory and outsourcing 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 advisory and outsourcing services are there based in Wilmington, United States?

RevenueBase identified 140 advisory and outsourcing services headquartered in Wilmington, United States 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?

The Siegfried Group, headquartered in Wilmington, tops this list with the largest team on record.

Which city has the most advisory and outsourcing services?

New York leads with 1824 headquartered companies, followed by Houston (804) and Chicago (737).

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 1,566 verified decision-maker contacts tracked across these 140 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 23, 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.