Best Collections Software for Commercial Contractors (2026)
Compare collections and AR tools for commercial and specialty contractors: pay apps, retainage, lien waivers and follow-up on overdue invoices. Best fit for each.
Sia Ghazvinian
Co-Founder & CEO
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Disclosure: Abivo is our product. Facts about other tools come from their own websites as of October 2026.
The short answer: If your billing is under control but your team still spends the week chasing general contractors, owners and property managers for overdue invoices, Abivo takes that follow-up: its AI agent Kate calls, texts and emails customers about overdue invoices, names the job, site and PO, and hands disputes to your team. If the bottleneck is producing and submitting pay applications, look at Siteline. If lien rights and waivers are the risk, look at Levelset. If you want one AI system across collections, cash application and deductions at enterprise scale, look at Stuut. If you are choosing your whole operating platform, BuildOps bundles invoicing and payments with field and project work.
Commercial contractors get paid differently from almost any other B2B business. Progress billing, retainage, pay application revisions, lien waivers and GC payment portals all sit between the invoice and the cash. That is why two kinds of tools show up in every shortlist: billing and compliance tools that get the pay app accepted, and collections tools that make sure someone follows up until it is paid. Most contractors with three or more people on receivables need both.
Comparison table
Tool | Best for | What it focuses on |
|---|---|---|
Abivo | Contractors whose collectors spend the week on follow-up calls and emails | AI agent that calls, texts and emails customers about overdue invoices; hands disputes to your team |
Siteline | Commercial subcontractors and trade contractors billing on pay apps | Pay app creation and submission, lien waivers, compliance documents, collections and A/R reporting |
Levelset | Subcontractors, suppliers and equipment rental companies protecting payment rights | Lien rights management, notices, lien waiver workflows, payment demands |
Stuut | Larger finance teams wanting one AI system across order to cash | AI agents for collections, cash application, payments, disputes and deductions |
BuildOps | Commercial HVAC, mechanical, electrical, plumbing and fire contractors choosing an operating platform | Projects, service and financials in one platform, with invoicing and a payments add-on |
1. Abivo
Abivo is AI collections software that works on top of the accounting system you already use. Its AI agent, Kate, calls, texts and emails customers about overdue invoices in your brand. Reminders name the invoice details that matter on a job, such as the job, site, PO and billing period, and one message can cover every open invoice on an account. You set the cadence per account or per segment, pause follow-up on a single invoice while a pay app is revised, and flag sensitive accounts so replies go to a named owner. Disputes, refusals and "speak to a person" requests go to your team with the full history. Multi-entity contractors keep each subsidiary's receivables separate. Best for: contractors whose aging report keeps growing even though billing goes out on time. OFS Group, a fire protection contractor, collected $842,518 in its first four months with Abivo. Not for: creating pay applications or managing lien rights. Pair Abivo with your billing or lien tool.
2. Siteline
Siteline is billing software for commercial subcontractors and trade contractors. It generates and submits pay apps, collects and tracks lien waivers, manages compliance documents, and adds collections, A/R reporting, forecasting and change order tracking. Best for: teams whose payments stall on pay app revisions and paperwork.
3. Levelset
Levelset focuses on payment rights in construction: lien rights management and notice automation, lien waiver workflows, job research and tools to send payment demands. It serves subcontractors, materials suppliers, equipment rental companies and general contractors. Best for: credit teams that need to protect lien rights on every job.
4. Stuut
Stuut describes itself as an AI coworker for order to cash: collections, cash application, payments, disputes and deductions, with agents that email, text and call customers and log into portals. It integrates with ERPs including SAP, Oracle, NetSuite, Microsoft Dynamics and Sage. Best for: larger finance teams that want one AI system across the whole order to cash process.
5. BuildOps
BuildOps is an operating platform for commercial contractors in HVAC and mechanical, electrical, plumbing, fire and life safety and refrigeration. It connects projects, service and financials, including invoicing and a payments add-on. Best for: contractors choosing or replacing their field and project platform, not adding a collections layer to an existing one.
How to choose
If the problem is... | Start with |
|---|---|
Collectors spend the week calling GCs, owners and property managers | Abivo |
Pay apps get rejected or revised before anyone can collect | Siteline |
Lien deadlines and waivers are the risk | Levelset |
You want one AI system for collections, cash application and deductions at enterprise scale | Stuut |
You are replacing your whole field and project platform | BuildOps |
Rule of thumb: billing and compliance tools get the invoice accepted; a collections layer gets it paid. Contractors with two or more people on collections usually run one of each.
Frequently asked questions
What is the best collections software for commercial contractors? It depends on where cash gets stuck. If invoices are accepted but customers pay late, an AI collections agent such as Abivo takes the follow-up and hands disputes to your team. If pay applications stall, Siteline. If lien rights are at stake, Levelset. Does Abivo replace my construction accounting or billing software? No. Abivo works on top of the accounting system you already use and focuses on follow-up on overdue invoices. Can collections follow-up wait while a pay app is being revised? With Abivo you can pause follow-up on a single invoice while the rest of the account keeps its cadence. Is this also collections software for subcontractors and specialty trade contractors? Yes. Mechanical, electrical, plumbing, fire protection and roofing contractors face the same retainage, pay app and GC payment delays covered here.
