Accounts Payable Services & AP Automation Providers in Saint Louis, MO

DataServ is an accounts payable automation company with its office in St. Louis, Missouri. Its software covers the whole life of a supplier invoice, from the moment a bill arrives to the point it is posted in the ERP. DataServ built the platform only for payables work and for organizations that handle large numbers of invoices, unlike general-purpose workflow tools. It sells to small, mid-sized and enterprise organizations.

What the platform does

DataServ's aim is to help finance departments make AP operations consistent, cut down on manual handling, tighten controls and see what they owe before invoices are posted in the ERP. The company says its AI-based capture is over 99 percent accurate and that more than 98 percent of invoices are matched automatically. Its main capabilities are:

• AI capture: reads and digitizes invoices that arrive by email, PDF, EDI, scan, supplier portal or paper, so that every document is taken in and its data is put into a standard format
• AutoVouch™: matches invoices against purchase orders and receiving records (two-way or three-way) before they reach the ERP, approves those that agree, and sends only mismatches to staff
• Intelligent routing: sends invoices to the right approvers based on rules such as dollar amount, department, vendor, company structure or exception type
• Analytics and reporting: tracks invoice volume, cycle times, open liabilities, approver performance and automation rates
• Compliance and risk tools: covers audit readiness, e-invoicing compliance and fraud prevention

The platform also includes a vendor portal, automated workflows, an API for connecting to other systems, and a security and compliance framework that DataServ calls SAFE AI. DataServ offers ready-made connections to ERP systems so that clean, approved data goes into the accounting system.

Industries and clients

DataServ markets its platform mainly to manufacturers, distributors and construction firms. It also lists healthcare providers and large enterprises among its users. Clients quoted on its website include Liberty Diversified International, Murphy Company, AB Mauri, Vertiv, Copeland, SSM Health, Merchants Fleet Management, EW Scripps and Rack Room Shoes. Some of these clients have used DataServ since the mid-2000s.

One client says DataServ was the first of three AP systems it implemented that actually delivered the results it wanted. Another credits AutoVouch™ with handling invoice volumes its team could not have managed without it.

How it works with clients

Clients describe DataServ as more than a software vendor. One says the company acts like a business analyst, asking questions that reveal ways to improve their processes. Another says audits became simpler because DataServ gives auditors direct access to the records they need, so staff no longer have to gather invoice samples. Clients also mention the platform's visibility, its ease of use and the dashboard for AP clerks.

DataServ sponsored Ardent Partners' 2026 AP Metrics That Matter research report, which looks at AP performance, trends and priorities. The company also publishes articles, case studies, guides, webinars and events. Buyers can request a demo or a product tour to see the platform before buying.

Prosper CPAs is a certified public accounting firm headquartered in west St. Louis County that works with both businesses and individuals across the St. Louis area and beyond. Launched in late 2022 and publicly introduced in early 2023, the practice was founded and is led by president Holly Breuer and describes itself as a women-owned, full-service CPA firm.

For buyers evaluating accounts payable support, its relevance lies in its Client Accounting Services group, which takes on day-to-day bookkeeping duties for organizations that want to outsource some or all of their finance function.

Accounts payable and outsourced accounting

The Client Accounting Services team, also called outsourced accounting on the firm's site, can either supplement a company's in-house bookkeepers or handle the books entirely, allowing owners to cut overhead and staffing headaches. The firm says this work scales up or down with a client's needs. Payables processing is offered together with receivables management as part of a wider bookkeeping package that includes:

• Accounts payable and accounts receivable management
• Bank account reconciliations
• Interim staff accountant and controller coverage
• Review and streamlining of accounting policies and procedures
• Outsourced CFO and bookkeeping support

The group is directed by Natalie Stevenson, CPA, who specializes in QuickBooks and also works in other accounting platforms. Her approach starts with learning how a client's business operates, then examining its internal systems and writing procedures that make routine work easier, with the stated goal of getting vendors and staff paid accurately and on time.

A senior associate on the team brings more than three decades of hands-on experience with payables, receivables, 1099 preparation, sales and use tax returns, general ledger work, month-end close and audit support.

Prosper is a service provider rather than a software vendor, so companies seeking a standalone AP automation platform should note that its offering centers on people and process within the client's existing accounting software.

Broader services and industries

Beyond bookkeeping, Prosper provides tax planning and preparation for businesses and individuals, including state and local, multi-state, payroll and personal property tax matters, cost segregation, and representation during IRS or state audits. Its assurance group prepares compilations and financial statement reviews, and the firm also offers business consulting. Industries it lists include:

• Engineering firms, law firms and other CPA firms
• Manufacturing and distribution
• Commercial real estate
• Healthcare and technology
• Non-profits and family-owned businesses
• Entrepreneurs, high-net-worth individuals, and estates and trusts

Background and approach

The firm reports that its professionals together bring more than one hundred years of accounting experience, and Breuer was named a top small business accountant by St. Louis Small Business Monthly in 2022.

Prosper says it was built on the idea that technical skill should go hand in hand with responsive communication, and it positions itself as an advisor that looks at a client's whole operation rather than only its tax filings. For a mid-sized St.

Louis company that wants an outsourced team to manage bills, reconcile accounts and tighten procedures while also having tax and assurance help available from the same firm, Prosper offers a combined local option.