Company lists · Data refreshed September 2026

Top 25 Accounting and outsourcing services based in Pittsburgh, United States

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

Compiled by the RevenueBase Data Team Data refreshed Sep 22, 2026 53 companies tracked

RevenueBase identified 53 accounting and outsourcing services headquartered in Pittsburgh, United States as of September 2026 and tracks 1,260 professional contacts across them, including 705 with verified work emails. New York is the largest hub.

This list covers accounting and outsourcing services headquartered in Pittsburgh, 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 22, 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 22, 2026 86% judged on-target in blind review

53Companies

1,260Contacts tracked

705Verified emails

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The 25 largest accounting and outsourcing services based in Pittsburgh, United States

Ranked by team size

Top 25 of 53 accounting and outsourcing services based in Pittsburgh, United States, ranked by team size, largest first. Data refreshed Sep 22, 2026. RevenueBase Smart Search rates how each company's information relates to accounting 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	Sisterson & Co. LLP	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	51-200	133 contacts →
	Partial evidence “Sisterson is one of the largest independently-owned certified public accounting and financial consulting firms in the Pittsburgh area.” Source: RevenueBase Database · checked Sep 22, 2026
2	Louis Plung & Company	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	51-200	99 contacts →
	Partial evidence “Located in Pittsburgh, Louis Plung & Company is one of the region’s largest independent certified public accounting firms.” Source: RevenueBase Database · checked Sep 22, 2026
3	Urish Popeck & Co., LLC	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	51-200	88 contacts →
	Partial evidence “Celebrating 50 years, Urish Popeck & Co.(UPCO) is a Public Company Accounting Oversight Board (PCAOB) and Canadian Public Accountability Board (CPAB) registered accounting and…” Source: RevenueBase Database · checked Sep 22, 2026
4	Bookminders	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	51-200	81 contacts →
	Indirect evidence “For more than 30 years, Bookminders has provided timely, accurate and cost effective bookkeeping for a variety of nonprofits and small businesses.” Source: RevenueBase Database · checked Sep 22, 2026
5	H2r CPA	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	51-200	63 contacts →
	Partial evidence “H2R CPA is a locally owned and managed accounting and business advisory firm in the western Pennsylvania region celebrating over 70 years serving closely held businesses and their…” Source: RevenueBase Database · checked Sep 22, 2026
6	Accruity	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	11-50	27 contacts →
	Partial evidence “Accounting and consulting services for real estate investors” Source: RevenueBase Database · checked Sep 22, 2026
7	Mccall Scanlon & Tice, LLC	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	11-50	16 contacts →
	Partial evidence “McCall Scanlon & Tice, LLC (MST) CPAs specializes in providing comprehensive Accounting Services including Tax Planning & Preparation, Audit, Business Valuations, Financial…” Source: RevenueBase Database · checked Sep 22, 2026
8	Goff Backa Alfera & Company, LLC	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	11-50	16 contacts →
	Partial evidence “We are a full-service public accounting and consulting firm serving clients in the Pittsburgh area and abroad.” Source: RevenueBase Database · checked Sep 22, 2026
9	Case Sabatini	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	11-50	15 contacts →
	Partial evidence “Case \| Sabatini is a public accounting and consulting firm headquartered in Pittsburgh, with other offices in Wexford and Palm Beach.” Source: RevenueBase Database · checked Sep 22, 2026
10	Markovitz Dugan & Associates	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	11-50	5 contacts →
	Partial evidence “MD & A provides a full range of cost effective accounting and business consulting services.” Source: RevenueBase Database · checked Sep 22, 2026
11	Hennessy Blotzer	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	3 contacts →
	Indirect evidence “Our firm provides outstanding service to our clients because of our dedication to the three underlying principles of professionalism, responsiveness and quality.” Source: RevenueBase Database · checked Sep 22, 2026
12	TBD Bookkeeping	Indirect evidence	Pittsburgh, United StatesHQ checked Sep 22, 2026	1-10	3 contacts →
	Indirect evidence “Nationwide virtual services including monthly bookkeeping, financial statements, catch up and clean up bookkeeping work, strategy sessions, business valuations and fractional CFO…” Source: RevenueBase Database · checked Sep 22, 2026
13	S Systems, INC	Indirect evidence	Pittsburgh, United StatesHQ checked Sep 22, 2026	1-10	3 contacts →
	Indirect evidence “Founded in 1998, S Systems has completed a wide range of projects for over 450 clients.” Source: RevenueBase Database · checked Sep 22, 2026
14	Cotton Mather Accounting Group LLC	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	11-50	2 contacts →
	Indirect evidence “From personal tax preparation to full service payroll for small- & medium-sized businesses, we are committed to adding a personal focus to each and every service we provide.” Source: RevenueBase Database · checked Sep 22, 2026
15	Clearview CPA Advisors LLC	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	2 contacts →
	Partial evidence “ClearView CPA Advisors LLC is a full service accounting and consulting firm that opened its doors to public in 2021.” Source: RevenueBase Database · checked Sep 22, 2026
16	Desisto, Jones, Schneeberger & Assoc. PC	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	2 contacts →
	Indirect evidence “DESISTO, JONES, SCHNEEBERGER & ASSOC.” Source: RevenueBase Database · checked Sep 22, 2026
17	Zoma Books	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	2 contacts →
	Indirect evidence “Our mission at Zoma Books is to provide entrepreneurs and small business owners with meaningful insight into their company's financial performance.” Source: RevenueBase Database · checked Sep 22, 2026
18	Tactive Business Solutions	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	1 contacts →
	Indirect evidence “At Tactive Business Solutions, we're dedicated to simplifying and optimizing your business finances.” Source: RevenueBase Database · checked Sep 22, 2026
19	Ledger LLC	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	1 contacts →
	Indirect evidence “Ledger combines experience in multiple industries and unmatched efficiency to give your start-up the operational advantage you need.” Source: RevenueBase Database · checked Sep 22, 2026
20	ZAE Bookkeeping	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	1 contacts →
	Indirect evidence “At ZAE Bookkeeping, our mission is to provide efficient and reliable bookkeeping services, empowering businesses to focus on their core operations while we handle their financial…” Source: RevenueBase Database · checked Sep 22, 2026
21	Infinity Accounting & Advisory Services	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	1 contacts →
	Partial evidence “Infinity Accounting and Business Consulting is a full-service tax, accounting, and business consulting firm.” Source: RevenueBase Database · checked Sep 22, 2026
22	Kathy L. Hess & Associates	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	1 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 2026
23	Advantage CFO & Controlling Services, LLC	Partial evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	1 contacts →
	Partial evidence “Advantage CFO & Controlling Services is a full-service finance and accounting services firm with more than 25 years of experience in financial planning and analysis, financial and…” Source: RevenueBase Database · checked Sep 22, 2026
24	Paperweight	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	1 contacts →
	Indirect evidence “Based out of Pittsburgh, PA, Michael Berger (Licensed CPA) founded Paperweight to facilitate the growth of the ever-evolving small business.” Source: RevenueBase Database · checked Sep 22, 2026
25	Lakehouse TAX & Accounting Services	Indirect evidence	Pittsburgh, PA, United StatesHQ checked Sep 22, 2026	1-10	1 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 22, 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: accounting 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 accounting and outsourcing services.
Partial evidence: Its own public description names part of accounting 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 accounting 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 53 accounting and outsourcing services based in Pittsburgh, United States

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Accounting and outsourcing services based in Pittsburgh, United States at a glance

As of Sep 22, 2026

56.0%Verified-email coverage

23.8Average contacts per company

1-10Median size (employees)

998.1%Largest-city concentration · New York

Sep 22, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

501-1,000

1,001-5,000

Email recency for this list is measured across the whole United States list rather than for Pittsburgh, so it is reported there. Company counts and contact totals on this page are exact for Pittsburgh, over 53 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 accounting 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 Pittsburgh, United States whose own description of what they do matches “accounting 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 accounting 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 accounting and outsourcing services, and records with no verified work email. Companies headquartered outside Pittsburgh 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, 705 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 22, 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.

Accounting 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 accounting 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 accounting and outsourcing services are there based in Pittsburgh, United States?

RevenueBase identified 53 accounting and outsourcing services headquartered in Pittsburgh, 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?

Sisterson & Co. LLP, headquartered in Pittsburgh, tops this list with the largest team on record.

Which city has the most accounting and outsourcing services?

New York leads with 529 headquartered companies, followed by Houston (341) and Los Angeles (284).

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 705 verified decision-maker contacts tracked across these 53 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 22, 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.