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Accounts payable (AP) is a critical component of any business’s financial operations. It involves handling payments to vendors and suppliers, guaranteeing uninterrupted cash flow, and building strong relationships with partners. However, managing AP in-house can be time-consuming, error-prone, and resource-intensive. To combat these problems, many organizations are outsourcing their accounts payable function starting with $10/hours. Companies that engage with expert AP service providers can benefit from increased efficiency, cost savings, accuracy, and compliance with financial requirements. In this blog, we’ll take a look at the top five outsourced accounts payable companies in USA and show how they can help businesses streamline their financial operations and focus on their core activities.
Top 5 Outsourced Accounts Payable Companies in USA[2025]
1. Account Payable Services
Account Payable Services is a leading finance and AP services provider in USA. We provide solutions that streamline financial operations for businesses of all sizes. We deliver personalized solutions tailored to the unique needs of industries like:
- Manufacturing Industry
- Retail Industry
- Healthcare Industry
- IT Industry
- Education Industry
- Construction Industry
and many more, ensuring accuracy, compliance, and operational efficiency while reducing costs. Our services include invoice receipt, indexing, and coding, invoice approvals and three-way match, invoice processing and exception handling, payment processing, vendor inquiries, tax filing, payments and statutory reporting, vendor master data administration, and T&E administration.
With experience serving over 5,000 clients across 20+ countries, we process millions of transactions every year. Our services start at just $10 per hour, providing a cost-effective and scalable option for outsourcing accounts payable functions. Using industry-leading accounting software such as QuickBooks, NetSuite, Sage, and SAP, we help organizations optimize their accounts payable processes, gain more control over their financial operations, and build long-term successful partnerships. Whether you need full accounts payable outsourcing or specialized services, we are committed to delivering value and efficiency to our clients.
2. Auxis
Auxis is a leading provider of finance and accounting outsourcing services, delivering comprehensive, end-to-end solutions for enterprises of all sizes. Auxis’s specialty is its ability to personalize services according to each client’s specific demands, guaranteeing that each solution is optimized to maximize operational efficiency.
Auxis uses cutting-edge technology such as robotic process automation (RPA) and powerful data analytics to drive major improvements in financial operations and provide real-time insights that improve decision-making and strategic financial management.
With extensive industry knowledge and a continued commitment to innovation and excellence, Auxis delivers proactive, adaptive solutions that help organizations meet the changing challenges of modern financial operations. As a trusted partner, Auxis is committed to assisting businesses achieve peak financial performance and long-term success.
3. GEP
GEP, an international managed services company, provides comprehensive accounts payable outsourcing services to Fortune 500 and Global 2000 enterprises. Their package of services includes invoice capture, payment processing, document scanning, and invoice auditing, all offered through a cloud-based, mobile-enabled source-to-pay platform that allows for flexibility and scaling. GEP also offers value-added consulting services, such as spend analysis and strategic cost management, to help firms optimize their financial processes and reduce inefficiencies, particularly when dealing with tail spend.
GEP’s expertise in all major payment and ERP systems provides smooth connections while increasing operational efficiency, accuracy, and compliance. Their approach to accounts payable outsourcing focuses on shortening payment cycle times and providing greater control over spend. Businesses that work with GEP benefit from improved financial performance, cost savings, and enhanced security, making it a reliable option for those looking to optimize their AP processes.
4. Stampli
Stampli simplifies and accelerates B2B payments by allowing businesses to pay directly through their bank using ACH. This streamlined solution decreases the complexity and time required to manage accounts payable. With variable month-to-month pricing and no long-term contracts, businesses can acquire a customized solution by contacting Stampli’s sales team for a price.
Stamply emphasizes data security, with a privacy policy outlining its commitment to protecting your information, yet detailed security details are not readily available. The organization offers strong customer support, including help system articles and an email contact form for inquiries, ensuring users get the help they need. Stampli is an excellent choice for firms looking to improve the efficiency and security of their accounts payable processes.
5. ILM Corp.
ILM Corp., based in Virginia, is a leader in accounts payable outsourcing, serving both commercial customers and critical government agencies such as the Department of Homeland Security, the Internal Revenue Service, and the United States Patent and Trade Office. With more than 40 years of experience, ILM has established a reputation for reducing invoice processing costs by more than 80% and speeding up payment times by up to 9 times compared to industry standards. ILM’s solutions help businesses optimize cash flow, reduce overhead costs, and free up employees to focus on high-value work by leveraging powerful AI and machine-learning technologies.
ILM offers a variety of accounts payable services, such as invoice scanning, vendor matching, data extraction and paperless check deposit, all powered by cutting-edge technology. Their services are fully integrated with most ERP systems, allowing for faster transfer of data and real-time optimization. Each client receives personalized support from a dedicated project manager, reflecting ILM’s commitment to client satisfaction. The company’s services meet stringent industry requirements such as ISO 9001:2015, SOC 1 Type 2 and PCI DSS compliance.
Conclusion
Businesses can benefit from outsourcing accounts payable by reducing operating expenses, increasing efficiency and gaining more control over financial processes. Businesses working with the right accounts payable outsourcing firm can streamline their financial operations and focus more on their core activities. Each of the top organizations mentioned (Accounts Payable Services, Auxis, GEP, Stampli and ILM Corp) brings different qualities to the table, allowing businesses to select the best fit based on their individual needs, industry requirements and ambitions.
Whether you’re looking for automation, cost reduction or personalized solutions, these top companies can help you meet your financial objectives. Contact one of these reputable outsourcing partners for additional information or to set up a custom consultation, and take the next step in optimizing your accounts payable process.