Invoice Butler does AR for you. Monk is the platform you own
Invoice Butler handles AR as a managed service. Monk is a platform your finance team operates and owns: playbooks you control, forecasting from your own collections data, AR data that stays in your stack. It turns revenue into cash on your terms.
What sets Monk apart from Invoice Butler
Invoice Butler does the work of AR on your behalf. Where teams outgrow it is when they need a platform: full DSO visibility, ERP-integrated analytics, playbook control, and cash application that stays inside their own stack. A service can do the work for you. Monk runs the work in your stack as you grow and keeps the data in your system.
| Feature |  |  |
|---|---|---|
| Collections outreach | Platform, full control | Managed service |
| AP portal submissions | 600+ portals | Coupa, Ariba, Tipalti |
| ERP integration (live data) | Native, real-time | Read-only billing access |
| DSO dashboards and analytics | Full AR intelligence | Limited reporting |
| Playbook and rules control | Full customization | Service-defined |
| Cash application | AI-native matching | Not in scope |
| Built around | The relationship, in your stack | A human service layer |
| Invoice Butler does the work for you. Monk does the work in your stack. | ||
Platform you own vs. service you outsource
Invoice Butler handles the work but you do not have the underlying data or control. Monk is software your team runs. Full visibility into every outreach, every portal submission, every payment status in real time.
ERP data guides collections
Monk pulls live data from your ERP and CRM. Monk bases every message on payment history, account tier, contract terms, and open dispute context. A managed service operating from read-only billing access cannot replicate that.
DSO as a metric you report
Monk gives you dashboards and dynamic cash forecasting built from your own collections data. Show leadership what AR looks like today and what cash looks like next month. Invoice Butler does the work. Monk does the work and shows you the collections data.
Trusted by
Why teams switch
Collections is where cash gets stuck
Most finance teams spend the majority of their AR time chasing a small fraction of invoices. Monk automates the follow-up, portal submissions, and dispute routing. Your team works on the exceptions, not the routine.
Every AP portal your customers use, handled
When a customer requires Coupa, Ariba, or a proprietary portal, your invoice does not get paid until it is submitted correctly. Monk handles 600+ portals automatically. Every day of portal delay is a day your cash does not move.
Running in under a month, not 6 months
Most AR platforms require dedicated implementation teams and multi-month timelines. Monk connects to your existing ERP and CRM and runs first collections in under a month. No IT project. No waiting until next quarter.
Customer result
How Profound got 122% more cash on hand in month one
HubSpot + QuickBooks
11 bespoke AP portals automated · 3 headcount saved
We were frustrated with invoicing. Cash on hand was lagging contracts signed. My team can now focus on running the business.
What switching looks like
Live and delivering results in under a month.
Teams ask the same question: how long before Monk is running? Here is what the rollout looks like.
ERP and CRM connected
NetSuite, QuickBooks, or SAP connected. Invoice data imported. Salesforce or HubSpot synced. Customer contacts and AR aging mapped. Monk handles the integration. Your team does not touch it.
First collections running. DSO baseline set
First automated outreach sequences live. AP portals identified and queued for automation. AR aging baseline established. You have a real-time view of what is outstanding and why for the first time.
Portals automated. Aging improving
All AP portals configured and submitting automatically. Dispute playbooks tuned to your customer base. First measurable DSO reduction visible. Your team is working exceptions, not the queue
DSO improvement confirmed. Team fully off manual
Full collections running autonomously. DSO improvement quantified and reportable to leadership. Most teams have recovered more than the annual investment by this point.
What our customers are saying
Monk gave us immediate visibility into unbilled revenue, tightened our collections process, and became a true AR system of record – all without adding headcount.
Monk's agents have already saved us hours every week by managing follow-ups on outstanding invoices, so we're not chasing down clients anymore. … What used to be a manual build is now a quick export.
Monk has transformed how we manage AR collections - automating the most time-consuming parts of the process while remaining incredibly easy to use and track. Beyond the platform itself, Monk is a true partner.
Monk integrated with my systems in less than a week. They took over all invoicing and ensured I got paid on time. The platform handled the complexity of my wholesaler business…
By the numbers
How much cash is trapped in your AR?
Monk in the press
The team has built a magical customer experience. Monk is the only AI-native accounts receivable platform in market today.
co-led Monk's $25M Series A
AR touches your customers and your revenue. There is no room for error. We obsess over making AI accurate enough to handle real money.
via PR Newswire, April 2026
Frequently asked questions
What is Monk?
Monk is the AI-native accounts receivable platform. Agents run collections by email and voice, submit invoices into buyer AP portals, resolve disputes, apply payments, and forecast collections, on top of the ERP and billing stack you already run.
How much does the Monk platform cost?
Pricing scales with business volume. Book a demo to learn more.
When can I see results?
Most customers see results in under a month. We can go live in under a month, depending on your business and scope of integrations.
What is required from my team to go live with Monk?
Unlike traditional AR tools, we take on the work for you and deliver results in under a month. Typical time commitment from customer is 1 hour to launch. Every customer gets a dedicated engineer, support, implementation specialist and agent specialist.
What is the best way to partner?
Connect your tools, define your rules, and get results in under a month. Request a demo to learn more.
What businesses does Monk support?
Monk supports B2B companies in every industry, from high-growth finance teams to enterprise AR organizations.
How is my data used?
Your data is encrypted, never sold, and used only to power your AR workflows and to improve performance for your account. It is strictly against our data governance policies to do anything with your data other than to serve you.
Manual AR consumes time. Monk handles the follow-up so your team can work on exceptions
Bring your AR aging report to a demo. We will walk through exactly what Monk would automate on day one and what your DSO looks like 90 days from now.