Company lists · Data refreshed September 2026
Top 25 Outsourcing advisory firms based in San Diego, United States
RevenueBase identified 80 outsourcing advisory firms headquartered in San Diego, United States as of September 2026 and tracks 615 professional contacts across them, including 309 with verified work emails. New York is the largest hub.
This list covers outsourcing advisory firms headquartered in San Diego, 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 21, 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.
The 25 largest outsourcing advisory firms based in San Diego, United States
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 137 contacts → | ||||
Indirect evidence “van den Boom & Associates is a life sciences focused firm that that specializes in supporting VC backed life science companies through outsourced finance, accounting, contracts…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 2 | 91 contacts → | ||||
Indirect evidence “Sayva Solutions is a professional services firm providing tailored solutions for businesses through project-based consulting, recruiting, and outsourced back-office functions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 3 | 55 contacts → | ||||
Partial evidence “At PBO Advisory Group, we assess, outsource, and advise in the areas of accounting & finance, human resources, human capital consulting, and business operations to increase…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 4 | 39 contacts → | ||||
Partial evidence “Lohman & Associates is a professional services firm that provides finance and accounting advisory services to early-stage and growing companies.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 5 | 31 contacts → | ||||
Indirect evidence “Exceeding expectations is our #1 goal.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 6 | 20 contacts → | ||||
Indirect evidence “California HR Services is a premier Human Resources Consulting Firm, based out of San Diego, California, specializing in providing expert, practical, and cost-effective HR…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 7 | 20 contacts → | ||||
Indirect evidence “Back Office Support Solutions is an outsourced accounting and operations firm that creates a tailored approach to support each client's specific needs in accounting/bookkeeping…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 8 | 19 contacts → | ||||
Indirect evidence “When your business needs actionable insights from the story your financial data is telling you, turn to us.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 9 | 17 contacts → | ||||
Partial evidence “Bainbridge Capital is a premiere M&A advisory firm that uses a tech-enabled process to deliver fully qualified off-market deal flow and delivers transactional advice to private…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 10 | 11 contacts → | ||||
Indirect evidence “We work with our clients to assess, organize, and execute initiatives through assessment, coaching, and outsourced execution: 1.Technology Strategy & Organizational Growth…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 11 | 9 contacts → | ||||
Indirect evidence “RG Alliance is an outsourced back-office support and bookkeeping firm based in San Diego, California.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 12 | 8 contacts → | ||||
Indirect evidence “SDW operates regionally and nationally and has extensive international experience.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 13 | 7 contacts → | ||||
Indirect evidence “Here at RISE Consulting Group, we offer outsourced accounting, financial, and other support services for privately held businesses, providing timely, accurate and actionable…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 14 | 5 contacts → | ||||
Partial evidence “Strategic HR Advisory specializes in HR consulting services for small to medium-size employers.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 15 | 4 contacts → | ||||
Partial evidence “Roldan Executive Search Group is a Top Tier International Executive Search Advisory Firm serving organizations in the U.S.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 16 | 4 contacts → | ||||
Partial evidence “The Magnolia Firm is an M&A advisory firm built by founders, for founders.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 17 | 3 contacts → | ||||
Partial evidence “Outsource Pros is an independent BPO, CX, and AI provider matchmaking firm that connects mid-market and enterprise companies with vetted global outsourcing partners, at no cost…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 18 | 3 contacts → | ||||
Indirect evidence “The Longship International team has years of experience in a full range of areas to help small businesses and start-ups looking to enter government contracting and international…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 19 | 3 contacts → | ||||
Indirect evidence “HighTech/FinTech/Educational/Legal/Financial/Immigration/Investment consulting services” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 20 | 2 contacts → | ||||
Indirect evidence “For top bankers considering changing jobs: We help them evaluate multiple banks and choose the one that makes the most sense for them.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 21 | 2 contacts → | ||||
Indirect evidence “Weber CFO is a specialty consulting firm created specifically to provide professional, scalable, and affordable Fractional CFO and Outsource Accounting solutions.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 22 | 2 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 23 | 2 contacts → | ||||
Indirect evidence “When you are committed to going the last distance in breaking barriers, becoming a CEO and hitting the peak potential in your business - Jessica will be waiting to take you there.” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 24 | 2 contacts → | ||||
Partial evidence “A management advisory firm, using data and experience to: • Drive Shareholder/Stakeholder value • Develop a vision and its underlying strategy • Ensure execution of that strategy…” Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
| 25 | 1 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 21, 2026Thanks. The Data Team will review it. | |||||
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: outsourcing advisory firms. 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 outsourcing advisory firms.
- Partial evidence
- Its own public description names part of outsourcing advisory firms, so it works in or next to the category without describing itself that way.
- Indirect evidence
- The description shown does not name outsourcing advisory firms. 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 80 outsourcing advisory firms based in San Diego, United States
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Outsourcing advisory firms based in San Diego, United States at a glance
As of Sep 21, 2026Companies by employee count
Email recency for this list is measured across the whole United States list rather than for San Diego, so it is reported there. Company counts and contact totals on this page are exact for San Diego, over 80 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 outsourcing advisory firms, 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 San Diego, United States whose own description of what they do matches “outsourcing advisory firms”. 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 outsourcing advisory firms), 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 outsourcing advisory firms, and records with no verified work email. Companies headquartered outside San Diego 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, 309 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 21, 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.
Outsourcing advisory firms by metro in the United States
- Outsourcing advisory firms in New York479
- Outsourcing advisory firms in Atlanta171
- Outsourcing advisory firms in Chicago163
- Outsourcing advisory firms in Houston157
- Outsourcing advisory firms in Los Angeles148
- Outsourcing advisory firms in Miami132
- Outsourcing advisory firms in Dallas131
- Outsourcing advisory firms in Austin120
- Outsourcing advisory firms in San Francisco99
- Outsourcing advisory firms in Washington97
- Outsourcing advisory firms in Boston92
- Outsourcing advisory firms in San Diego80
- Outsourcing advisory firms in Denver77
- Outsourcing advisory firms in Seattle69
- Outsourcing advisory firms in Phoenix61
- Outsourcing advisory firms in Charlotte57
- Outsourcing advisory firms in Tampa55
- Outsourcing advisory firms in Orlando47
- Outsourcing advisory firms in Minneapolis45
- Outsourcing advisory firms in Irvine44
- Outsourcing advisory firms in Philadelphia44
- Outsourcing advisory firms in San Jose40
- Outsourcing advisory firms in Nashville38
- Outsourcing advisory firms in New York City38
- Outsourcing advisory firms in Scottsdale37
- Outsourcing advisory firms in San Antonio36
- Outsourcing advisory firms in Las Vegas34
- Outsourcing advisory firms in Newport Beach34
- Outsourcing advisory firms in Columbus33
- Outsourcing advisory firms in Raleigh31
- Outsourcing advisory firms in Sheridan31
- Outsourcing advisory firms in Boca Raton30
- Outsourcing advisory firms in Pittsburgh29
- Outsourcing advisory firms in Wilmington29
- Outsourcing advisory firms in Cincinnati28
- Outsourcing advisory firms in Fort Lauderdale28
- Outsourcing advisory firms in Frisco28
- Outsourcing advisory firms in Portland27
- Outsourcing advisory firms in Salt Lake City27
- Outsourcing advisory firms in Cleveland26
- Outsourcing advisory firms in Alpharetta25
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 outsourcing advisory firms, 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 outsourcing advisory firms are there based in San Diego, United States?
RevenueBase identified 80 outsourcing advisory firms headquartered in San Diego, 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?
VAN DEN Boom & Associates LLC, headquartered in San Diego, tops this list with the largest team on record.
Which city has the most outsourcing advisory firms?
New York leads with 479 headquartered companies, followed by Atlanta (171) and Chicago (163).
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 309 verified decision-maker contacts tracked across these 80 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 21, 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.
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