SubBase Alternatives for Trade Contractors (2026)
SubBase is a procurement and materials-management system for trade contractors — purchase orders, requisitions, vendor management, and delivery tracking, with invoice checking built in as one module of that workflow. The closest category peers doing the same underlying job are Kojo and Field Materials, both built around field-to-office requisitions and materials procurement. Contractors whose real complaint is bad invoices getting paid — wrong unit prices, quantities never ordered, charges never quoted — usually aren't looking for a new procurement system at all; that narrower job is what CheckIT Invoice and, in a different way, AP automation tools like Stampli and AvidXchange are built for. Which one fits depends on whether the problem is how you buy materials or what happens to the invoice after you already bought them.
What SubBase Actually Is
SubBase is a procurement and materials-management system built for trade contractors. The core of it is purchase orders, requisitions, vendor management, and delivery tracking — the paperwork that happens before and during a buy, not just after the invoice shows up. Invoice checking exists inside SubBase as one module of that larger workflow, not as the whole product.
That makes it the right shape for a contractor who wants to change how the entire shop buys materials: field crews requesting what they need, the office turning requests into POs, deliveries tracked against what was actually ordered. It's a workflow change that touches the yard and the desk both, and for shops that want that change, it's a real system built for the job.
Because invoice checking rides inside a bigger procurement layer, adopting it generally means adopting the procurement layer around it too. That's a fair trade if procurement was already the goal. It's a heavier lift if the only thing you actually wanted fixed was the invoices.
When to Stay on SubBase
If your crews already request materials through SubBase and your office already turns those requests into POs, tearing that out to fix a smaller problem is a bad trade. The requisition-to-PO chain is the hard part to build and the expensive part to rebuild — don't burn it down over one complaint.
Same logic applies if delivery tracking against your POs is actually working — knowing what showed up on a job site against what was ordered, before the invoice even lands, is worth protecting. If your vendor list, pricing agreements, and requisition approvals all live inside SubBase, that's real infrastructure. Switching systems over a single complaint about invoice accuracy means trading a working procurement setup for a narrower tool.
Stay on SubBase if the actual complaint is about procurement — vendor management, approvals, delivery visibility. Those are the problems it's built to solve. Switch only when the complaint is specifically about what's on the invoice.
The Alternatives, Ranked by What They Actually Do
Here's the field once you separate "buying materials" from "checking invoices."
- CheckIT Invoice — does one job: line-level invoice verification against the quote or contract. Drag in the invoice, drag in the quote, and it flags unit prices off the contract, quantities never ordered, and charges never quoted, then drafts the dispute email in one click. It doesn't touch how materials get bought and doesn't ask a shop to run requisitions through it — setup takes about five minutes, with no IT project. It connects to QuickBooks Online, pushing verified invoices in as bills with per-line cost codes. Contractors using it report 75% less manual review time, and early-customer data shows $50K–$150K recovered annually on $500K–$2M of annual spend. (Extrapolated from early-customer data. Results vary by invoice volume and contract complexity.) One plumbing contractor on California's Central Coast switched from SubBase to CheckIT for this exact reason — the specifics are worth a look before assuming a full procurement rebuild is the only fix.
- Kojo — procurement built for trade contractors, covering field-to-office requisitions and materials management. It's a category peer to SubBase, not a narrower alternative: comparing the two means comparing two systems built to do the same underlying job with different execution. Where invoice checking exists inside Kojo, it's a piece of a bigger procurement workflow, the same as it is in SubBase.
- Field Materials — materials procurement with document capture built in for contractors, aimed at getting paperwork off paper and into a system as materials move through a job. Like SubBase and Kojo, it's solving the buying problem. It isn't built specifically to catch a bad invoice against a quote.
- AP automation (Stampli, AvidXchange, and similar tools) — solves a third, different problem: routing invoices for approval and getting them paid faster. That's real value; nobody wants an invoice sitting on someone's desk for two weeks. But approval routing answers who signs off and when, not whether the invoice matches what was actually agreed to. An invoice with a wrong unit price can sail cleanly through an approval chain, because routing was never checking the math against the contract in the first place.
- Manual checking, in Excel or by hand — free, and honest about what it costs: time, plus the misses that happen when someone's checking forty invoices during a bad week. It works fine at low volume. It gets expensive to trust as volume climbs, because catching a wrong quantity buried on line fourteen of a supply house invoice takes the same close reading whether it's invoice one or invoice fifty.
How to Choose: Procurement Problem vs. Billing Problem
Industry data puts the baseline at 39% of construction invoices containing at least one error, averaging 2.5% overbilling on invoice value. That's the backdrop for this whole decision, and it applies whether or not procurement is broken.
If what's actually wrong is how materials get requested, ordered, and tracked to a site — visibility into what's coming, approvals before a buy happens, vendor management — that's a procurement problem. SubBase, Kojo, and Field Materials each solve it, with their own take on how.
If what's actually wrong is that invoices come in with prices that don't match the quote, quantities nobody ordered, or charges nobody approved, and they're getting paid anyway because nobody has time to check every line, that's a billing problem. AP automation routes those invoices faster without checking the math. Manual review checks the math but doesn't scale. CheckIT Invoice checks the math without asking a shop to change how it buys.
The two problems can coexist, and fixing one doesn't fix the other. A shop can have flawless procurement and still get overbilled, because a clean PO doesn't stop a supply house from padding a unit price on the invoice that follows it.
The One-Job Test
Before switching anything, ask one question: is the complaint about buying materials, or about the invoice that shows up after the materials were already bought? If it's the invoice — a unit price that crept up, a quantity nobody ordered, a charge that was never on the quote — a new procurement system isn't what fixes it.
CheckIT runs a free audit: a founder-run review of one job's invoices, checked line by line against the quote. No procurement change, no new system to learn, no commitment beyond one job. See what's actually sitting on that job's invoices, then decide whether the fix is procurement or invoice-checking — they're rarely the same fix.
Questions, answered.
SubBase is a solid fit for contractors who want to overhaul how the shop buys materials — purchase orders, requisitions, vendor management, and delivery tracking connecting field and office. It's less suited to a contractor whose only complaint is that invoices don't match the quote, since invoice checking is one module inside a bigger procurement system rather than the main event.
CheckIT Invoice is built for that one job specifically: line-level verification against the quote or contract, with no requirement to change how materials get bought. It connects to QuickBooks Online and works alongside whatever procurement setup, or lack of one, is already in place.
Kojo and SubBase are category peers — both are procurement systems for trade contractors covering requisitions, materials management, and the field-to-office handoff. Neither is primarily an invoice-verification tool; where invoice checking shows up in either, it's one piece of a larger procurement workflow.
No. AP automation tools like Stampli and AvidXchange route invoices for approval and get them paid faster, which is a different job from checking whether the invoice actually matches the quote. An invoice with an off-contract unit price can pass through an approval chain untouched, because routing was never built to check the math against the contract.
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