The Best Bill.com Integrations and Apps in 2026
Bill.com (BILL) runs accounts payable and receivable for a huge number of small and mid-sized businesses — but its whole value depends on syncing cleanly with the accounting system that closes your books. The good news: BILL is accounting-sync heavy, with automatic two-way integrations for every major general ledger and ERP most companies run.
The gap: BILL’s native list is deliberately narrow — it’s built around accounting sync, so anything outside that (CRM, project tools, custom vendor systems) means CSV exports and manual entry. Here are the Bill.com integrations actually worth setting up, grouped by what they do — and then the way to connect BILL to anything with an API, even when no native integration exists.
Accounting and ERP: QuickBooks, NetSuite, Sage Intacct, Xero
This is BILL’s core — a two-way sync that keeps bills, payments, and vendor records matched to your ledger without rekeying.
- QuickBooks Online — automatic two-way sync of bills, vendors, payments, and chart-of-accounts coding.
- QuickBooks Desktop (Pro, Premier, Enterprise) — the same sync for teams still on desktop QuickBooks.
- Oracle NetSuite — sync bills and payments with classes, departments, and locations for multi-entity accounting.
- Sage Intacct — dimension-level two-way sync for teams that need granular AP reporting.
- Xero — automatic sync of bills, payments, and vendors to keep your ledger current.
- Microsoft Dynamics — native two-way sync for teams on Dynamics.
Broader ERP and import/export: Acumatica, Sage, Blackbaud
For systems without a full two-way connector, BILL supports structured import/export so data still moves without manual keying.
- Acumatica — a native integration for AP automation on Acumatica ERP.
- Sage 50 and Sage 100 — import/export flows to move bills and payments in and out of BILL.
- Blackbaud, FreshBooks — additional accounting systems supported via BILL’s import/export tools.
Expense and receipt capture: Expensify, Tallie, HubDoc
- Expensify — pull employee expense reports into BILL for payment.
- Tallie and HubDoc — capture receipts and bills and route them into BILL’s AP workflow.
Tax and mail: Tax1099, Earth Class Mail
- Tax1099 — generate and file 1099s from your BILL vendor payment data.
- Earth Class Mail — digitize paper invoices mailed to you and route them into BILL.
The AI way to connect Bill.com to anything: Carly
Native connectors cover the major accounting systems — but that’s all they cover by design. The moment you need BILL tied to a tool outside accounting — your CRM, a project system, a custom vendor portal — or you want something smarter than a fixed field-mapping sync, you’ve hit the ceiling of BILL’s native integrations.
Carly is an AI executive assistant that connects to 200+ tools and, crucially, lets you bring your own API key to connect to anything with a REST API — Bill.com included. Instead of a fixed accounting catalog, you get an agent that:
- Acts on triggers, 24/7 in the cloud — when a bill arrives, an approval stalls, or a payment clears, Carly does the next step without you in the app.
- Reasons over your data — not just “copy this field,” but “read incoming bills, flag any that don’t match a PO, and email the approver a summary.”
- Ties Bill.com to the rest of your stack — a new payable becomes one step in a workflow that also touches email (Gmail and Outlook), calendar, CRM, and tasks.
- Builds the workflow from a plain-English description — tell it “when a bill from Iron Mountain over $2,000 posts in BILL, message finance in Slack and log an approval task” and it interviews you, then builds it.
AI agents start at $35/month, and steps in a workflow that don’t use AI run free and unlimited. See the full Claude + Bill.com integration guide for how the API-key connection works.
How to connect Bill.com to a tool with no native integration
- In BILL, request API access and generate your developer key and organization credentials (BILL Developer settings).
- Paste your Bill.com API credentials into Carly on the integrations page.
- Describe the workflow in plain English, and Carly builds it — connecting BILL to whatever else you need, on triggers, without your laptop open.
Frequently Asked Questions
Does Bill.com have integrations?
Yes. Bill.com offers automatic two-way sync with QuickBooks Online and Desktop, Oracle NetSuite, Sage Intacct, Xero, and Microsoft Dynamics, plus import/export support for Acumatica, Sage 50/100, Blackbaud, and FreshBooks, integrations with Expensify, Tallie, HubDoc, and Tax1099, and a REST API for custom connections.
What is the best Bill.com integration for automation?
For accounting sync, BILL’s native two-way connectors to QuickBooks, NetSuite, Sage Intacct, and Xero are the core. For automation that acts on triggers and reasons over your bill data — and to connect BILL to tools outside accounting — an AI agent like Carly connects via your Bill.com API credentials and runs workflows in the cloud.
How do I connect Bill.com to an app that isn’t listed?
Use Bill.com’s REST API. Request API access in BILL’s developer settings, then hand the credentials to a platform that supports bring-your-own-API-key connections — Carly does this and can wire BILL to any tool with an API.
How much does an AI automation for Bill.com cost?
Carly’s AI agents start at $35/month, with non-AI workflow steps running free and unlimited. Your BILL subscription is separate.
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