Company lists · Data verified August 2026

Top 20 Accounting process outsourcing providers based in San Diego, United States

Name: Accounting process outsourcing providers based in San Diego, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Verified Aug 28, 2026 48 companies tracked

There are 48 accounting process outsourcing providers headquartered in San Diego, United States (RevenueBase, August 2026). RevenueBase tracks 625 professional contacts across them, including 71 with verified work emails and 142 with mobile numbers. New York is the largest hub.

This list covers accounting process outsourcing providers 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. Data current as of August 28, 2026.

48Companies

625Contacts tracked

71Verified emails

142Mobile numbers

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The 20 largest accounting process outsourcing providers based in San Diego, United States

Ranked by team size

Top 20 of 48 accounting process outsourcing providers based in San Diego, United States, ranked by team size, largest first. Data verified Aug 28, 2026. Click a count to unlock that company's people.
#	Company	HQ	Employees	Contacts	Verified emails
1	Back Office Support Solutions	San Diego, CA	11-50	20	1
2	Mead Consulting Group	San Diego, CA	11-50	16	11
3	Booxkeeping Corp	San Diego, CA	11-50	11	8
4	Twin Oaks LLP	San Diego, CA	1-10	10	2
5	RG Alliance Group LLC	San Diego, CA	11-50	9	7
6	Simplexity Services	San Diego, CA	11-50	7	7
7	Rise Consulting Group, LLC	San Diego, CA	11-50	7	3
8	Bbbs INC	San Diego, CA	11-50	7	1
9	Adaptive Accounting & Business Solutions	San Diego, CA	1-10	5	4
10	Achieve Accounting	San Diego, CA	1-10	2	2
11	SD Bookkeeping, INC	San Diego, CA	1-10	2	2
12	Intrinsic Accounting Services, INC	San Diego, CA	1-10	2	2
13	Oakum Chartered Accounting	San Diego, CA	11-50	2	1
14	Avviso Financial	San Diego, CA	1-10	2	1
15	Serrano Bookkeeping	San Diego, CA	1-10	2	1
16	Totally Balanced Bookkeeping, LLC	San Diego, CA	1-10	1	1
17	Jaec Consulting, INC	San Diego, CA	1-10	1	1
18	ATJ Bookkeeping LLC	San Diego, CA	1-10	1	1
19	Bromeliad Books LLC	San Diego, CA	1-10	1	1
20	Account On ME	San Diego, CA	1-10	1	1

Showing 20 of 48 accounting process outsourcing providers based in San Diego, United States

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Accounting process outsourcing providers based in San Diego, United States at a glance

As of Aug 28, 2026

1-10Median size (employees)

New YorkLargest hub · 130 HQs

142Contacts with mobile numbers

1Emails re-verified in last 30 days

Companies by employee count

1-10

11-50

51-200

Accounting process outsourcing providers by metro in the United States

Metro	Companies
Accounting process outsourcing providers in New York	130
Accounting process outsourcing providers in Houston	88
Accounting process outsourcing providers in Los Angeles	79
Accounting process outsourcing providers in Austin	60
Accounting process outsourcing providers in Dallas	53
Accounting process outsourcing providers in San Diego	48
Accounting process outsourcing providers in Chicago	45

How this list was built

Source: The RevenueBase company graph: 21.3 million companies and 398.9 million professional contacts resolved from primary sources.
Inclusion: Companies whose own business descriptions match “accounting process outsourcing providers”, with match quality audited by blind human judging, and headquartered in San Diego, United States.
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: Contact records re-verify on a rolling cadence; 1 contacts on this list were re-verified in the last 30 days.
Refresh: Lists are refreshed periodically as the underlying company graph is re-verified. Last verified Aug 28, 2026.

Frequently asked

How many accounting process outsourcing providers are there based in San Diego, United States?

There are 48 accounting process outsourcing providers headquartered in San Diego, United States as of August 2026 (RevenueBase).

What is the largest company on this list?

Back Office Support Solutions, headquartered in San Diego, tops this list with the largest team on record.

Which city has the most accounting process outsourcing providers?

New York leads with 130 headquartered companies, followed by Houston (88) and Los Angeles (79).

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 71 verified decision-maker contacts tracked across these 48 companies.

How current is this list?

The list is refreshed periodically as the underlying company graph is re-verified. It was last verified on August 28, 2026.

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About this data

RevenueBase is a B2B contact data platform. Its company graph covers 21.3 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, the same data that powers RevenueBase's B2B data products and the free research portal.