Company lists · Data refreshed September 2026

Top 25 Accounting software integration firms worldwide

Name: Accounting software integration firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 27, 2026 6,120 companies tracked

RevenueBase identified 6,120 accounting software integration firms worldwide as of September 2026 and tracks 54,397 professional contacts across them, including 15,467 with verified work emails. Brazil is the largest market and Sao Paulo the largest hub.

This list covers accounting software integration firms worldwide, 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 27, 2026. Country and city lists for accounting software integration firms follow the table.

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 27, 2026 86% judged on-target in blind review

6,120Companies

54,397Contacts tracked

15,467Verified emails

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The 25 largest accounting software integration firms worldwide

Ranked by team size

Top 25 of 6,120 accounting software integration firms worldwide, ranked by team size, largest first. Data refreshed Sep 27, 2026. RevenueBase Smart Search rates how each company's information relates to accounting software integration firms: 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	Grupo IOB	Indirect evidence	Campinas, BrazilHQ checked Sep 27, 2026	1,001-5,000	828 contacts →
	Indirect evidence “A IOB une Inteligência em legislação e Tecnologia avançada para resolver os desafios do presente e do futuro de contadores e de empresas de todos os portes.” Source: RevenueBase Database · checked Sep 27, 2026
2	Fortnox	Indirect evidence	Växjö, SwedenHQ checked Sep 27, 2026	501-1,000	785 contacts →
	Indirect evidence “Fortnox är Sveriges ledande leverantör av internetbaserade program för företag, föreningar samt redovisnings- och revisionsbyråer.” Source: RevenueBase Database · checked Sep 27, 2026
3	RCA	Indirect evidence	Saint-herblain, FranceHQ checked Sep 27, 2026	201-500	522 contacts →
	Indirect evidence “RCA, éditeur de solutions pour l'expertise comptable.” Source: RevenueBase Database · checked Sep 27, 2026
4	Outbooks	Partial evidence	Harrow, United KingdomHQ checked Sep 27, 2026	201-500	477 contacts →
	Partial evidence “Outbooks is a leading provider of outsourcing services to accounting and bookkeeping firms.” Source: RevenueBase Database · checked Sep 27, 2026
5	OSOME	Partial evidence	Central Business District, SingaporeHQ checked Sep 27, 2026	201-500	457 contacts →
	Partial evidence “Expert accountants + simple software = financial admin, done.” Source: RevenueBase Database · checked Sep 27, 2026
6	SCI Sistemas Contábeis	Indirect evidence	Bom Retiro, BrazilHQ checked Sep 27, 2026	201-500	451 contacts →
	Indirect evidence “A SCI é uma empresa brasileira de tecnologia que trabalha exclusivamente para o mercado contábil, iniciou as suas atividades em 1991.” Source: RevenueBase Database · checked Sep 27, 2026
7	Karbon	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 27, 2026	201-500	364 contacts →
	Partial evidence “Karbon is the collaborative practice management platform for accounting firms.” Source: RevenueBase Database · checked Sep 27, 2026
8	Acceo Solutions	Strong evidence	Montréal, QC, CanadaHQ checked Sep 27, 2026	1,001-5,000	353 contacts →
	Strong evidence “A leader in the Canadian IT industry, ACCEO Solutions Inc.(“ACCEO”) specializes in the design, implementation, integration, and support of management and accounting solutions.” Source: RevenueBase Database · checked Sep 27, 2026
9	Botkeeper	Partial evidence	St Petersburg, FL, RussiaHQ checked Sep 27, 2026	51-200	341 contacts →
	Partial evidence “It's time to experience the ONLY automated bookkeeping solution purpose-built for Accounting Firms.” Source: RevenueBase Database · checked Sep 27, 2026
10	Taxdome	Partial evidence	Cheyenne, WY, United StatesHQ checked Sep 27, 2026	201-500	340 contacts →
	Partial evidence “TaxDome is the leading practice management platform built for full-service tax, bookkeeping, and accounting firms.” Source: RevenueBase Database · checked Sep 27, 2026
11	CARET	Partial evidence	Del Mar, CA, United StatesHQ checked Sep 27, 2026	201-500	331 contacts →
	Partial evidence “CARET brings the latest in technology and automation to over legal and accounting firms, empowering highly skilled professionals to refocus their expertise on what truly matters.” Source: RevenueBase Database · checked Sep 27, 2026
12	Makosi	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	324 contacts →
	Partial evidence “For over 15 years, Makosi has been redefining what’s possible in the accounting and audit industry with cutting-edge, tech-powered workforce solutions.” Source: RevenueBase Database · checked Sep 27, 2026
13	1-800accountant	Partial evidence	New York, NY, United StatesHQ checked Sep 27, 2026	201-500	320 contacts →
	Partial evidence “1-800Accoutant is America’s leading virtual accounting firm for small businesses.” Source: RevenueBase Database · checked Sep 27, 2026
14	DSD Business Systems	Indirect evidence	San Diego, CA, United StatesHQ checked Sep 27, 2026	51-200	307 contacts →
	Indirect evidence “Founded in 1984 in San Diego, DSD Business Systems is an award-winning technology partner with 45 offices across North America, serving small- to medium-sized organizations.” Source: RevenueBase Database · checked Sep 27, 2026
15	Aptitude Software	Partial evidence	London, United KingdomHQ checked Sep 27, 2026	501-1,000	304 contacts →
	Partial evidence “Here at Aptitude, we provide software solutions to enable deliver fully autonomous finance so our customers can drive growth, efficiency and sustainability.” Source: RevenueBase Database · checked Sep 27, 2026
16	Prosoft	Partial evidence	Sao Paulo, BrazilHQ checked Sep 27, 2026	201-500	298 contacts →
	Partial evidence “Desde 1986 a Prosoft desenvolve softwares para apoiar empresários contábeis a aconselhar seus clientes com rapidez, precisão e eficiência.” Source: RevenueBase Database · checked Sep 27, 2026
17	Canopy	Partial evidence	South Jordan, UT, United StatesHQ checked Sep 27, 2026	201-500	290 contacts →
	Partial evidence “Canopy is the all-in-one practice management platform built to help accounting firms simplify operations, delight clients, and drive firm-wide growth.” Source: RevenueBase Database · checked Sep 27, 2026
18	Accon AVM	Indirect evidence	Arnhem, NetherlandsHQ checked Sep 27, 2026	1,001-5,000	277 contacts →
	Indirect evidence “Accon avm wordt Flynth.” Source: RevenueBase Database · checked Sep 27, 2026
19	ACD	Indirect evidence	Tours, FranceHQ checked Sep 27, 2026	201-500	274 contacts →
	Indirect evidence “ACD est un groupe français et indépendant, fort de plus de 40 ans d’expérience 🦖 au service de la profession comptable, avec une vision claire : proposer une offre flexible…” Source: RevenueBase Database · checked Sep 27, 2026
20	Qoyod - قيود	Indirect evidence	Riyadh, Saudi ArabiaHQ checked Sep 27, 2026	51-200	250 contacts →
	Indirect evidence “تأسست قيود عام 2016 بهدف تسهيل الأعمال، وتقديم أفضل تجربة لأعمالهم من خلال تقديم نظام محاسبي سهل واحترافي، بالإضافة إلى حلول مالية ابتكارية لمساعدة أصحاب الأعمال على تنمية أعمالهم…” Source: RevenueBase Database · checked Sep 27, 2026
21	Mercurius Advisory Services	Partial evidence	New Delhi, IndiaHQ checked Sep 27, 2026	201-500	249 contacts →
	Partial evidence “Mercurius Advisory Services (MAS) provides comprehensive suite of accounting, bookkeeping and taxation services to small, medium and large enterprises.” Source: RevenueBase Database · checked Sep 27, 2026
22	FULLL	Indirect evidence	Lyon, FranceHQ checked Sep 27, 2026	201-500	227 contacts →
	Indirect evidence “Chez nous accompagnons les experts-comptables dans la transformation de leur métier en mettant à leur disposition une diversité d'outils performants, collaboratifs et sécurisés…” Source: RevenueBase Database · checked Sep 27, 2026
23	Sentient	Partial evidence	Hyderabad, United StatesHQ checked Sep 27, 2026	201-500	220 contacts →
	Partial evidence “Sentient is a wholly owned GCC of Ascend Partners, a Top 25 US Public Accounting platform.” Source: RevenueBase Database · checked Sep 27, 2026
24	Greytrix	Indirect evidence	Navi Mumbai, IndiaHQ checked Sep 27, 2026	201-500	220 contacts →
	Indirect evidence “Greytrix, with a robust global presence spanning over 50+ countries and serving clients, has honed its technical prowess in providing cutting-edge Business Management Solutions.” Source: RevenueBase Database · checked Sep 27, 2026
25	SWK Technologies, INC	Partial evidence	East Hanover, NJ, United StatesHQ checked Sep 27, 2026	201-500	217 contacts →
	Partial evidence “Imagine a future where your business effortlessly blends modern accounting and financial systems with streamlined operations layered over a secure and scalable IT infrastructure.” Source: RevenueBase Database · checked Sep 27, 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 software integration 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 accounting software integration firms.
Partial evidence: Its own public description names part of accounting software integration firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name accounting software integration 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 6,120 accounting software integration firms worldwide

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Accounting software integration firms worldwide at a glance

As of Sep 27, 2026

28.4%Verified-email coverage

8.9Average contacts per company

1-10Median size (employees)

2.5%Largest-city concentration · Sao Paulo

Sep 27, 2026Page data refreshed

Companies by employee count

1-10

3,937

11-50

1,752

51-200

303

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

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 software integration 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.
Coverage: Every country. Country and city lists for accounting software integration firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “accounting software integration 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 accounting software integration 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 accounting software integration firms, and records with no verified work email.
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, 15,467 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 27, 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 software integration firms by location

27 lists · largest first

Every Accounting software integration firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 software integration 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 accounting software integration firms are there worldwide?

RevenueBase identified 6,120 accounting software integration firms worldwide 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?

Grupo IOB, headquartered in Campinas, tops this list with the largest team on record.

Which country has the most accounting software integration firms?

Brazil leads with 995 companies, followed by the United States (989) and the United Kingdom (335). Every accounting software integration firms list by country and city is linked on this page.

Which city has the most accounting software integration firms?

Sao Paulo leads with 153 headquartered companies, followed by London (85) and Paris (60).

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 15,467 verified decision-maker contacts tracked across these 6,120 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 27, 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.