Company lists · Data refreshed September 2026

Top 25 Invoice processing outsourcing firms worldwide

Name: Invoice processing outsourcing firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 1,363 companies tracked

RevenueBase identified 1,363 invoice processing outsourcing firms worldwide as of September 2026 and tracks 23,476 professional contacts across them, including 4,229 with verified work emails. India is the largest market and Sao Paulo the largest hub.

This list covers invoice processing outsourcing 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 28, 2026. Country and city lists for invoice processing outsourcing 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 28, 2026 86% judged on-target in blind review

1,363Companies

23,476Contacts tracked

4,229Verified emails

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The 25 largest invoice processing outsourcing firms worldwide

Ranked by team size

Top 25 of 1,363 invoice processing outsourcing firms worldwide, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to invoice processing outsourcing 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	IQ Backoffice	Partial evidence	Manila, PhilippinesHQ checked Sep 28, 2026	501-1,000	831 contacts →
	Partial evidence “IQ BackOffice is the leading accounting Business Process Outsourcing and Automation provider, offering 99.97% quality and up to 68% savings to companies around the globe.” Source: RevenueBase Database · checked Sep 28, 2026
2	Medius	Strong evidence	Linköping, SwedenHQ checked Sep 28, 2026	501-1,000	784 contacts →
	Strong evidence “Medius links invoice capture, processing, and payment to replace the worry and wondering of managing AP with calm and confidence.” Source: RevenueBase Database · checked Sep 28, 2026
3	Gire S.A	Indirect evidence	Comuna 4, ArgentinaHQ checked Sep 28, 2026	501-1,000	768 contacts →
	Indirect evidence “Somos GIRE, una empresa con más de 30 años de experiencia en el mercado de procesamiento inteligente de información y en el desarrollo de soluciones de cobranzas y pagos para…” Source: RevenueBase Database · checked Sep 28, 2026
4	Data Entry Solution	Indirect evidence	Santa Clara, CA, United StatesHQ checked Sep 28, 2026	n/a	676 contacts →
	Indirect evidence “Data Entry Solution is one of the leading back office solution providers based in California.” Source: RevenueBase Database · checked Sep 28, 2026
5	Not Available	Indirect evidence	Na, United StatesHQ checked Sep 28, 2026	n/a	658 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
6	Cameo Corporate Services	Partial evidence	Chennai, IndiaHQ checked Sep 28, 2026	201-500	527 contacts →
	Partial evidence “Cameo Corporate Services Limited is a Business Process Outsourcing firm headquartered in Chennai, India.” Source: RevenueBase Database · checked Sep 28, 2026
7	Diagonal Gest, SL	Indirect evidence	Barcelona, SpainHQ checked Sep 28, 2026	501-1,000	418 contacts →
	Indirect evidence “Tessi IBERIA nace en 1.997 y aunque en el inicio se centra en la gestión hipotecaria, ya desde sus orígenes nace con unos valores fundamentales, que todavía hoy perviven, y…” Source: RevenueBase Database · checked Sep 28, 2026
8	Tradeshift	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	501-1,000	359 contacts →
	Partial evidence “Leading AP automation software \| Reduce processing cost by 90%\| For large and mid-sized companies \| Our customers include DHL, Danone, HSBC, Kuehne + Nagel, and Air France KLM.” Source: RevenueBase Database · checked Sep 28, 2026
9	GI Outsourcing	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	201-500	311 contacts →
	Partial evidence “GI Outsourcing is a UK-based accountants outsourcing firm.” Source: RevenueBase Database · checked Sep 28, 2026
10	BDO Solutions	Partial evidence	Moka, MauritiusHQ checked Sep 28, 2026	501-1,000	310 contacts →
	Partial evidence “BDO Solutions is a Business Services & Outsourcing company located in Mauritius and forms part of the international BDO network, which extends across 166 countries and…” Source: RevenueBase Database · checked Sep 28, 2026
11	Anion Healthcare Services	Partial evidence	Hyderabad, IndiaHQ checked Sep 28, 2026	501-1,000	309 contacts →
	Partial evidence “Anion is an ISO 27001:2013 and HIPAA compliant organization operating in the field of Healthcare Services, providing Back Office data processing (BPO) for Providers/Physicians…” Source: RevenueBase Database · checked Sep 28, 2026
12	Grupo Asserth	Partial evidence	São Paulo, BrazilHQ checked Sep 28, 2026	501-1,000	309 contacts →
	Partial evidence “SPED Consulting BPO Bussiness Process Outsourcing Receivables Management and Control Accouting an Financial Adminsitration Inteligence and Management Processes of Recovery…” Source: RevenueBase Database · checked Sep 28, 2026
13	Opuscapita	Partial evidence	Espoo, FinlandHQ checked Sep 28, 2026	5,001-10,000	300 contacts →
	Partial evidence “As part of GEP, a global leader in AI-driven procurement and supply chain solutions, we deliver e-invoicing, O2C and P2P messaging, AP automation and advanced procurement…” Source: RevenueBase Database · checked Sep 28, 2026
14	Circulus	Indirect evidence	Plano, TX, United StatesHQ checked Sep 28, 2026	501-1,000	298 contacts →
	Indirect evidence “At Circulus, we provide Product and Service Offerings designed to Optimize, Augment, and Automate AP Processes.” Source: RevenueBase Database · checked Sep 28, 2026
15	ROPO	Partial evidence	Kuopio, FinlandHQ checked Sep 28, 2026	201-500	247 contacts →
	Partial evidence “Ropo is the Nordic market leader and original pioneer, transforming the invoicing flow end-to-end.” Source: RevenueBase Database · checked Sep 28, 2026
16	Value RCM Solutions Pvt. LTD	Partial evidence	Kolkata, IndiaHQ checked Sep 28, 2026	201-500	247 contacts →
	Partial evidence “Value RCM Solutions is a leading provider of comprehensive outsourcing solutions tailored to the healthcare industry (Medical Billing Companies, Hospitals, Ambulatory Surgical…” Source: RevenueBase Database · checked Sep 28, 2026
17	IMS Decimal	Indirect evidence	Ahmedabad, IndiaHQ checked Sep 28, 2026	201-500	218 contacts →
	Indirect evidence “IMS Decimal - Your Offshore Accounting and Financial Back-office Services Provider.” Source: RevenueBase Database · checked Sep 28, 2026
18	Nanonets	Partial evidence	San Francisco, CA, United StatesHQ checked Sep 28, 2026	51-200	207 contacts →
	Partial evidence “Nanonets agents understand key details in files – like invoices, POs, BoL & clinical documents – work through complex processes and act with transparency, making them the most…” Source: RevenueBase Database · checked Sep 28, 2026
19	GARSA	Indirect evidence	Madrid, SpainHQ checked Sep 28, 2026	501-1,000	199 contacts →
	Indirect evidence “Apostamos por la Transformación para adaptarnos y ser flexibles a las necesidades de nuestros clientes y fortalecer cada vez más nuestros mecanismos de seguimiento y trazabilidad…” Source: RevenueBase Database · checked Sep 28, 2026
20	ARTEC	Partial evidence	Saint-petersburg, RussiaHQ checked Sep 28, 2026	n/a	197 contacts →
	Partial evidence “Artec provides outsourcing for F&A and Procurement processes by using state of the art technologies and lean thinking approach for business flow re-engineering.” Source: RevenueBase Database · checked Sep 28, 2026
21	Sterling	Indirect evidence	Kraków Old Town, PolandHQ checked Sep 28, 2026	1,001-5,000	186 contacts →
	Indirect evidence “ℹ Sterling – The Missing Piece to Your Business Success Looking for seamless customer service, smarter credit management, or efficient debt recovery?” Source: RevenueBase Database · checked Sep 28, 2026
22	Rillion	Indirect evidence	Stockholm, SwedenHQ checked Sep 28, 2026	51-200	180 contacts →
	Indirect evidence “We’re on a mission to simplify AP and payment processes and make them (actually) enjoyable.” Source: RevenueBase Database · checked Sep 28, 2026
23	Allzone Management Solutions	Indirect evidence	Glendale, CA, United StatesHQ checked Sep 28, 2026	201-500	178 contacts →
	Indirect evidence “Allzone is a leading offshore Medical Billing Company that provides billing, coding and RCM (revenue cycle management) services to clients across USA.” Source: RevenueBase Database · checked Sep 28, 2026
24	Lyanthe	Indirect evidence	Echt, NetherlandsHQ checked Sep 28, 2026	51-200	160 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
25	BST	Indirect evidence	Santiago, ChileHQ checked Sep 28, 2026	51-200	155 contacts →
	Indirect evidence “BST es una empresa que entrega soluciones especializadas de BPO, combinando tecnología, experiencia y un acompañamiento cercano para transformar procesos clave de negocio.” Source: RevenueBase Database · checked Sep 28, 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: invoice processing outsourcing 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 invoice processing outsourcing firms.
Partial evidence: Its own public description names part of invoice processing outsourcing firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name invoice processing outsourcing 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 1,363 invoice processing outsourcing firms worldwide

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Invoice processing outsourcing firms worldwide at a glance

As of Sep 28, 2026

18.0%Verified-email coverage

17.2Average contacts per company

11-50Median size (employees)

3.2%Largest-city concentration · Sao Paulo

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

596

11-50

477

51-200

180

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 invoice processing outsourcing 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 invoice processing outsourcing firms are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “invoice processing outsourcing 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 invoice processing outsourcing 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 invoice processing outsourcing 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, 4,229 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 28, 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.

Invoice processing outsourcing firms by location

7 lists · largest first

Every Invoice processing outsourcing firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Invoice processing outsourcing firms based in Ahmedabad, India38

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 invoice processing outsourcing 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 invoice processing outsourcing firms are there worldwide?

RevenueBase identified 1,363 invoice processing outsourcing 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?

IQ Backoffice, headquartered in Taguig Manila, tops this list with the largest team on record.

Which country has the most invoice processing outsourcing firms?

India leads with 296 companies, followed by the United States (218) and Brazil (172). Every invoice processing outsourcing firms list by country and city is linked on this page.

Which city has the most invoice processing outsourcing firms?

Sao Paulo leads with 43 headquartered companies, followed by Ahmedabad (38) and New Delhi (22).

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 4,229 verified decision-maker contacts tracked across these 1,363 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 28, 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.