Accounts payable sounds like a single job until a bill arrives. Then it becomes data entry, detective work, policy enforcement, a scavenger hunt for an approver, a negotiation with cash flow, a payment instruction, and finally an accounting record. Stampli and Melio both promise to make this less painful. Their products overlap. Their instincts do not.
Stampli enters through the messy document. It puts the invoice at the center, gathers the conversation around it, and asks its AI employee, Billy, to capture fields, suggest codes, route approvals, detect duplicates or suspicious details, and sync the result to the accounting system. Melio enters later. Its original seduction was simpler: pay a supplier by bank transfer without adopting a grand new finance system. The vendor can receive money in the form it prefers, even when the buyer funds the transaction another way.
That makes this less a horse race than a diagnosis. If the recurring pain is “Who approved this, and why is the general-ledger code wrong?”, Stampli is pointed at it. If the pain is “I need to pay the electrician on Friday without writing a check,” Melio is pointed at that. A buyer who starts with a feature grid may miss the difference. Start with the first place work breaks.
Capture, code, discuss, approve, match, audit, then pay.
Choose a bill, fund it, deliver it, sync it, then add controls.
The invoice is a tiny workplace
Stampli's best idea is organizational, not robotic. It treats each invoice as a place where work happens. Comments, supporting documents, decisions, and an audit trail stay attached to the object under discussion. That sounds obvious. It is also the opposite of the ordinary arrangement in which the invoice lives in an inbox, the explanation lives in chat, the approval lives in a reply-all chain, and the final numbers live in the ERP.
Billy sits inside that workplace. Stampli says the system learns a company's patterns and assists with capture, coding, routing, matching, vendor validation, and fraud detection while keeping human review in control. In 2025 the company dropped “the Bot” from the name and began calling Billy an AI employee. The branding is ambitious, but the useful question is mundane: how often does Billy make the correct suggestion, how clearly does it expose uncertainty, and how quickly does it learn from corrections?
A live trial should be built around ugly invoices, not polished samples. Feed it a partial purchase-order match, an unfamiliar vendor, a multi-entity allocation, a duplicate with slightly altered details, and a bill whose approver is on vacation. The happy path is a demo. Exceptions are the product.
The breadth is meant for finance teams living with that complexity. Stampli says it supports native functionality for more than 70 ERPs, serves more than 1,800 customers, and processes more than 400,000 invoices a week. Those are company-reported figures, not an independent performance guarantee. They do explain the posture: this is an operating layer above an ERP, sold through a conversation and priced by quote.
A cheap payment can still be expensive when three people chase an approval. A powerful workflow can still be wasteful when one owner pays ten predictable bills.YesPress analysis
Melio makes the first yes easier
Melio's product instinct is small-business native. An owner may not search for “procure-to-pay orchestration.” The owner knows a bill is due. Melio lets that person upload or photograph the bill, choose how to fund it, select how the vendor receives it, schedule the transfer, and track the result. The web product also covers accounts receivable, while the mobile app makes approval and payment status available away from a desk.
“Free ACH” remains the memorable hook, but it now needs an asterisk. As of this writing, Melio's Go plan costs no monthly subscription fee, is limited to one user, and includes five free ACH payments each month. Additional standard ACH payments cost 50 cents. The paid Core plan is listed at $25 a month before additional users and includes 20 free ACH payments, QuickBooks Online and Xero sync, batch payments, custom approval workflows, and an AI assistant. Boost and Unlimited extend the allowances, roles, and support.
So the wedge is still cheap payments, not universally free payments. That distinction matters less to a firm making four transfers a month than to one making forty. Card-funded payments, faster delivery, wires, and checks can carry separate transaction fees. The attractive trick remains: the payer can use a card even if the supplier does not accept cards directly, potentially buying time until the card statement is due. The fee is the price of that float, and it should be compared with the actual value of preserving cash.
| Question | Stampli | Melio |
|---|---|---|
| Natural buyer | AP or finance team | Owner, bookkeeper, accountant |
| Starting point | Invoice processing | Bill payment |
| Pricing motion | Quote-based platform | Free entry tier, paid plans and transaction fees |
| Control depth | Built for complex routing, matching, entities, and audits | Controls expand by subscription tier |
| Best proof | Handles a real exception cleanly | Moves a real payment cheaply and syncs it correctly |
Price is part of the architecture
Stampli does not publish a simple sticker price. That slows comparison, but it also signals that the company expects a buyer to quantify invoice volume, entities, modules, integrations, and implementation. Melio publishes a ladder. A solo operator can begin on Go, discover a need for accounting sync or approvals, then move into Core or higher tiers. The product grows as coordination becomes a problem.
Neither structure is automatically cheaper. The relevant calculation is total friction. For Melio, add the subscription, extra users, transfers beyond the included allowance, card fees, expedited delivery, and the human time still spent preparing and approving bills. For Stampli, add the quote, implementation effort, optional payment or card modules, and the organizational cost of changing a workflow. Then subtract avoided duplicate payments, fewer touches, faster approvals, and a cleaner audit.
The middle is getting crowded
The products are moving toward each other. Melio now advertises AI bill capture, accounting sync, approval workflows, tax-document tools, and multiple paid tiers. Stampli extends from AP automation into procurement, vendor management, cards, and payments. One starts as an inexpensive action and adds governance. The other starts as governance and adds more actions.
Ownership sharpens that movement. Xero announced its agreement to acquire Melio in June 2025 and completed the transaction that October. The strategic logic is clear: join a US small-business payment network to an accounting platform that wants a stronger American position. QuickBooks remains central to Melio's distribution history, but Xero now has an incentive to make accounting and payment feel like one motion.
For buyers, consolidation creates opportunity and risk. A tighter Xero experience could remove duplicate entry and reduce setup. It could also change packaging, priorities, or partner relationships. Evaluate what exists today, ask for the roadmap in writing, and avoid buying a promised integration as if it were shipped software.
Run the exception audit
Before booking either demo, pull a month of invoices and mark every manual touch. Note who entered the data, corrected a code, found the approver, answered a vendor, scheduled the payment, fixed the sync, and supplied evidence to an auditor. The resulting map is more valuable than a hundred-item request for proposal.
- Count monthly bills, payments, legal entities, currencies, approvers, and accounting systems.
- Label each exception and estimate the minutes it consumed.
- Give both vendors the same difficult sample set and demand an end-to-end demonstration.
- Price the real mix of users and payment methods, not the cheapest advertised path.
- Verify roles, audit exports, data retention, ERP sync behavior, and failure recovery.
Choose Melio when paying is the central job, the team is small, and the workflow can stay legible without a dedicated AP cockpit. Its free tier is a sensible test bed, provided five included ACH payments are enough to reveal how the product behaves. Choose Stampli when the invoice is already a collaboration problem, when approvals and allocations require policy, or when an auditor needs the story behind a number. Its value should appear before money moves.
A thirty-day pilot can settle most of this. Do not measure clicks alone. Measure the share of invoices that need correction, the median wait for approval, the number of vendor questions, the time to close, and the effort required to explain one transaction six months later. Convenience is visible immediately. Control proves itself when memory fades.
There is no trophy for installing the more comprehensive platform. There is also no prize for saving a subscription fee while employees reconstruct decisions from inboxes. The winner is the system that removes the costly ambiguity at the center of your own accounts payable process. Find that ambiguity first. The software decision becomes much less dramatic.
Questions buyers actually ask
Is Melio still free for ACH bill payments?
Melio's Go plan has no monthly subscription fee and includes five free ACH payments per month. Additional ACH payments and faster or card-funded methods can carry fees. Higher tiers include larger allowances.
Does Stampli publish its pricing?
No simple public rate card is available. Stampli uses quote-based pricing tied to the capabilities and operating profile a company needs.
Which is better for complex approvals?
Stampli is purpose-built for deeper invoice routing, collaboration, matching, entities, and audit history. Melio offers approval workflows on paid plans, but teams should test them against real exceptions.
Do both products connect to QuickBooks and Xero?
Both support accounting integrations, but the scope varies. Melio includes QuickBooks Online and Xero sync on Core and higher plans, with limited introductory sync on Go. Stampli promotes native support for more than 70 ERPs, including QuickBooks products.
Can Melio replace a full AP platform?
It can cover the job for an owner-led business with straightforward bills. Teams with many entities, purchase orders, approvers, or exceptions should verify that its paid controls are deep enough.