7 of the 9 accounts payable tools we list have a public API, confirmed on their own website. Here they are side by side.
Listed alphabetically. A tool is ranked by its reviews once it has 3.
| Tool | Reviews | Lowest paid plan | Free plan | Free trial | Public API | Runs on | Main features |
|---|---|---|---|---|---|---|---|
ApprovalMaxApprovalMax streamlines your accounts payable process for modern finance teams. | ReviewsNone yetWrite one for ApprovalMax | Lowest paid plan$69.20per organisation per month, billed yearlyStandard, as of November 14, 2026 | Free planNot confirmed | Free trial14 days | Public APIYes | Runs oniOS, Android | Main features
|
BILLExpense management software that powers smart company cards | ReviewsNone yetWrite one for BILL | Lowest paid plan$49per user per monthEssentials, as of October 28, 2026 | Free planYes | Free trial30 days | Public APIYes | Runs onMobile app | Main features
|
MediusAutonomous AP, powered by agentic AI across invoice-to-pay. | ReviewsNone yetWrite one for Medius | Lowest paid planSee plans | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | Main features
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MelioFlexible vendor payments built for modern AP, with card, bank transfer and global payments. | ReviewsNone yetWrite one for Melio | Lowest paid planNot confirmed | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onMobile app | Main features
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RampCorporate cards, travel, expenses and accounts payable in one spend management platform | ReviewsNone yetWrite one for Ramp | Lowest paid plan$15per user per month plus a platform feePlus, as of October 19, 2026 | Free planYes | Free trial30 days | Public APIYes | Runs onNot confirmed | Main features
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RoutableAutomate payouts, manage compliance, and integrate payment infrastructure into your existing processes. | ReviewsNone yetWrite one for Routable | Lowest paid plan$1,250per monthGrowth, as of November 13, 2026 | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | Main features
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| TipaltiFinance automation software covering accounts payable, mass payments, procurement, expenses and treasury. | ReviewsNone yetWrite one for Tipalti | Lowest paid plan$99per month, plus transaction feesAccounts Payable, as of November 13, 2026 | Free planNot confirmed | Free trialNot confirmed | Public APIYes | Runs onNot confirmed | Main features
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From each tool's own website. “Not confirmed” means we couldn't confirm it there, not that the tool doesn't have it. Each tool's page says when its facts were checked.
A tool is listed here only when we've confirmed on its own website that it has a public API. Tools we couldn't confirm it for are left out, even if they may have it. Vendors can't pay for a place on this list. Add a tool we missed