Top 50 Fastest-Paying GCs

We analyzed our data to assemble a list of the top 50 fastest-paying GCs in commercial construction.

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Siteline vs. Knowify at a Glance

Knowify feature information is based on publicly available product documentation as of June 2026. Verify current capabilities directly with Knowify before making a purchase decision.

The Verdict

For commercial subcontractors billing several projects across multiple GCs, Siteline is the stronger pick. It handles custom GC forms, lien waivers, lien rights tracking, and portal submissions that Knowify simply doesn't offer, and its customers average 52.6 days DSO against a 96-day industry benchmark.

Knowify earns its place with smaller and residential-leaning trade contractors who need estimating, scheduling, and job costing more than deep billing and compliance tools, and its QuickBooks-native design and per-user pricing make it an easy entry point for smaller teams. If billing complexity, GC compliance, or slow payment is the pain point, go with Siteline. If you're still building out core project management and billing is a lighter lift, Knowify is the more practical starting point.

Overviews

What is Siteline?

Siteline is a billing and A/R management software built specifically for commercial subcontractors. It centralizes pay app creation, lien waiver and lien rights management, change order tracking, GC compliance, collections, and reporting into one system, connected to the ERP or accounting system the sub already uses.

Siteline serves commercial trade contractors across trades, with a strong fit for growing and mid-market teams managing complex monthly progress billing. Its core customer manages more than 10 active projects with monthly progress billing, works with several GCs who have different form requirements, and previously relied on spreadsheets or disconnected software to manage billing. Siteline integrates with all major construction ERPs (including Sage 300, Sage 100, Sage Intacct, Vista, Spectrum, Acumatica, CMiC, and FOUNDATION) and directly with GC payment portals.

Across its customer base, Siteline tracks nearly $14 billion in receivables. Customers achieve an average DSO of 52.6 days, compared to a 96-day industry average reported in Siteline's 2025 State of Subcontractor Billing report.

Learn more about Siteline's billing software.

What is Knowify?

Knowify is a project management and job costing platform built for small trade contractors. Its core strength is helping subs manage the full project lifecycle: estimating, proposals, budgeting, scheduling, time tracking, purchasing, and invoicing—all synced to QuickBooks.

Knowify supports AIA®-style billing, including generating G702® and G703® forms through a partnership with AIA Contract Documents. It also supports fixed-price and T&M billing, and syncs pay apps and retainage data with QuickBooks Online in real time. Reviewers consistently highlight its QuickBooks integration quality and the breadth of project management tools relative to its price point. It serves residential and commercial trade contractors.

Knowify does not currently offer lien waiver management, GC portal integrations, or custom GC form support beyond standard G702® and G703®. Knowify is QuickBooks/Intuit-first, with additional integrations for non-ERP software for payroll, payments, time tracking, etc.

Siteline vs. Knowify: Feature Comparison

Where Siteline Wins

Custom GC Forms and Portal Submission Reduce Pay App Rejections

The standard G702® and G703® forms are not what most GCs actually require. Bigger general contractors use proprietary billing forms, sworn statements, affidavits, and lien waivers, and many mandate submission of forms through portals.

Knowify handles standard G702® and G703® forms well. But if your GC uses a custom form or requires submission through a portal, you're back to manual work. Siteline pre-builds and stores custom forms for any GC. Its library already includes forms from over 24,000 GCs, and Siteline integrates directly with submission portals, including Textura and Procore Pay.

For a commercial subcontractor managing pay apps across multiple GCs, this eliminates one of the most time-consuming recurring tasks in the billing cycle. Kovach Enclosure Systems, a 325-person metal and glass contractor, used to manually manage 50 to 60 pay apps each month. After implementing Siteline, the team there saved more than 3 days per month and reduced A/R aging by 20 days. And flooring contractor Universal Metro eliminated pay app rejections entirely after implementing Siteline, in addition to shaving 10 days off invoice aging and saving 30 hours per week across their team.

Learn more about Siteline's pay app software.

Lien Waivers Are Part of the Billing Workflow, Not a Separate Problem

Knowify has no lien waiver functionality. For commercial subcontractors, that is a meaningful gap. Lien waivers are a standard requirement on most commercial projects, and missing or late waivers are one of the most common reasons pay apps get kicked back.

Siteline handles the full lien waiver cycle. It generates the correct waiver type (conditional or unconditional, progress or final) pre-filled with accurate project data, sends bulk waiver requests to all vendors on a job, tracks response status, validates completed waivers with AI (flagging wrong amounts, missing signatures, and mismatched details), and bundles everything for GC submission. Vendors sign directly from email with no Siteline account required.

Customers have seen the impact firsthand. Beaty Masonry, the largest masonry contractor in Albuquerque, had 75% of payments on hold due to missing or late lower-tier lien waivers. After implementing Siteline, they eliminated compliance holds entirely and cut 20 to 25 hours of weekly waiver admin. And mechanical contractor Industrial Commercial Systems streamlined its waiver workflow, saving the team 8 hours per month and eliminating payment holds due to vendor waivers.

See Siteline's lien waiver management software.

Lien Rights Tracking Lives Inside the Billing Workflow

Lien waivers document what you've already released. Lien rights are what give you leverage in the first place. Yet, most subcontractors manage them in spreadsheets—if they track them at all. Knowify doesn't offer lien rights functionality. Siteline tracks state-specific deadlines and helps teams generate supported lien-rights documents using existing project data.

Those capabilities matter because lien requirements vary from state to state. Every state has different timelines for preliminary notices, different triggers for when rights are at risk, and different requirements for what has to be filed and when. Siteline accounts for those distinctions behind the scenes and surfaces the deadlines and milestones that matter for each project, so your team knows what action to take before it's too late. You can see lien protection status—protected, at risk, or missing key information—across your entire portfolio at a glance without toggling between systems or maintaining a separate tracking document.

Siteline also generates the required state-specific lien documents (e.g., preliminary notices, notices to owner) from existing project data and supports certified mail delivery so teams can send without printing, envelope stuffing, or a trip to the post office.

For subcontractors managing projects across multiple states, lien rights are your last line of leverage when a GC goes silent. By keeping deadline tracking, document generation, and billing in one place, Siteline helps teams protect those rights without relying on spreadsheets, manual reminders, or someone's memory.

Learn more about Siteline's lien rights management software.

A/R Moves Faster—52.6-Day Average DSO vs. a 96-Day Industry Average

Cash flow is one of the most important metrics for commercial subcontractors, and DSO is the clearest way to measure it. Slow billing, rejected pay apps, and inconsistent collections all add days to DSO. Siteline customers achieve an average DSO of 52.6 days, compared to the 96-day industry average tracked in Siteline's 2025 State of Subcontractor Billing report. That's more than six weeks faster, giving subcontractors quicker access to working capital.

Those gains compound over time. Within their first year of using Siteline, customers improve their DSO by an average of 16.7%, driven by cleaner pay app submissions, faster approvals, and more consistent collections follow-up. Acme Erectors, for example, cut DSO from 77 days to 58 days (a 25% reduction) after standardizing their billing workflows in Siteline.

Knowify does not publish comparable DSO data. Its impact on payment speed is largely a function of how cleanly it connects to QuickBooks and how quickly GCs process invoices—factors that Knowify doesn't control.

ERP Integration Options Include QuickBooks and So Much More

Knowify's accounting integration is built around the QuickBooks family of products. For a small subcontractor on QuickBooks Online, that is often sufficient. But growing and mid-to-large commercial subcontractors frequently run construction-specific ERPs, including Sage 300 CRE, Sage 100, Viewpoint Vista and Spectrum, Acumatica, CMiC, and FOUNDATION. Siteline integrates with all of these. It pulls project, contract, and schedule-of-values data from your ERP, then pushes billing data back once it's complete, eliminating double entry and keeping accounting current without manual reconciliation.

Where Knowify Has the Edge

Smaller, Self-Performing Teams Get Stronger Project Management

Knowify is a genuine project management tool. It covers estimating, phase-by-phase budgeting, Gantt scheduling, crew assignment, time tracking, purchase orders, RFIs, submittals, daily logs, and a client portal. For a small trade contractor who wants one system to run the business from bid to final invoice, Knowify is hard to match at its price point.

Siteline does not have estimating, field scheduling, or time tracking. It is purpose-built for the billing-to-cash workflow and assumes the subcontractor already manages field operations in a separate system or ERP. If billing is not yet one of your biggest operational pains and you need to improve field execution and project control first, Knowify may be the right starting point.

It's a Better Fit for Residential and Mixed Residential/Commercial Work

Knowify explicitly serves both residential and commercial trade contractors. If your business includes significant residential work, including remodeling, service calls, and small residential projects, Knowify's service dispatch module, client portal, and customer-facing proposal tools are more directly relevant.

Siteline is built for commercial subcontractors billing monthly on lump sum, unit price, and T&M contracts for larger (multi-month) active jobs. Contractors doing primarily residential or service work typically fall outside its core use case.

Pricing

Siteline

Siteline offers custom pricing based on billing volume through an annual subscription model. Plans include pay app creation, lien waiver workflows, change order tracking, collections, reporting, forecasting, GC portal integrations, and other billing and vendor management features. All plans include unlimited seats and offices, so adding users or locations does not increase cost. Lien Rights Management is an optional paid add-on. Contact Siteline for a quote.

Knowify

Knowify publishes pricing on its website. Plans are billed annually:

• Core: $99/month for 1 user ($29/month per additional user)
• Advanced: $329/month for 10 users ($29/month per additional user)
• Enterprise: Custom pricing, includes unlimited users

Monthly billing is available at higher rates ($149/month for Core, $399/month for Advanced). A 14-day free trial is available. The Service Pro field management add-on runs $99/month annually. The Enterprise plan includes unlimited users and inventory management.

Knowify's per-user pricing makes it accessible for smaller teams. For a 10-person operation on the Advanced plan, it'd be $329 a month. Real-world pricing varies based on plan, contract length, and negotiation.

Customer Proof

Acme Erectors

Acme Erectors, a structural steel subcontractor, runs FOUNDATION for accounting and Siteline for billing. The result: a 19-day reduction in DSO (from 77 days to 58 days), a 10% increase in monthly billing volume, and 5 days saved per month on pay app processing for the A/R manager. The team also saved 16 hours per month on change order management.

"Siteline provides me with a comprehensive overview of our billing status without having to individualize or drill down into details for the information I need. It makes my life so much easier."

Joshua W., VP of Operations, Acme Erectors

RankerAMG

RankerAMG is a 100-person commercial architectural cladding contractor in California. Before Siteline, Controller Lisa Coddington spent 20 hours every month building and updating billing sheets in Excel, often working past midnight to hit submission deadlines. After implementing Siteline, that process dropped to two hours per month (a 90% reduction), and PMs now input billing information directly, eliminating the back-and-forth Coddington was managing manually.

“Siteline makes your life easier, consolidates everything, and holds project managers accountable. Change can be difficult, but Siteline isn't. So, don't be afraid and give it a chance. I'm really happy we did this!”

Lisa C., Controller, RankerAMG

Cornerstone Forming

Cornerstone Forming is an Atlanta-based concrete and rough carpentry contractor with 79 employees. Before Siteline, their billing process consisted of email threads, phone calls, and server-based file storage with no central system to track who owned what and when. Accounting Manager Colton Smith was manually chasing updates from PMs and assembling GC-specific billing packages. After implementing Siteline, the team reclaimed 24 hours per month and has had zero pay app rejections due to math errors. They also took on six new projects without adding headcount.

"Siteline gives us a complete and accurate picture of the status of every job at that moment. We no longer wonder what caused a payment delay. There’s no need to email; there’s no need to call. The answer is in Siteline.”

Colton S., Accounting Manager, Cornerstone Forming

Who Should Choose Siteline vs. Knowify?

Who should choose Siteline?

Siteline is the right fit if:

• You are a commercial subcontractor doing monthly progress billing on several active projects across multiple GCs.
• Your GCs require custom pay app forms beyond the standard G702® and G703®.
• You submit billing through GC payment portals.
• Managing lien waivers and lower-tier vendor compliance is a recurring time drain and holds up payments.
• Your ERP or accounting system is something other than a QuickBooks product (although Siteline integrates with QuickBooks Online and Enterprise Contractor as well).
• Your DSO is consistently above 70 days, and slow payments are affecting cash flow.
• You want a billing tool that connects your PMs, field teams, and accounting staff in one place.

Who should choose Knowify?

Knowify may be the better fit if:

• Your primary need is project management, estimating, and scheduling; billing is a secondary need.
• You run QuickBooks Online or Enterprise Contractor and do not need other ERP integrations.
• Your projects are smaller in scope, and billing is relatively straightforward.
• Your clients require only standard AIA® G702® and G703® forms.
• You serve residential customers or mix residential and commercial work.
• Your team is small (under 50 employees), and you want a lightweight all-in-one system.
• You do not need to manage lien waivers or track lien rights.
• You do not need to submit to GC portals.
• You self-perform most of your work and need field tools like time tracking, GPS check-ins, and daily logs.

Getting Started with Siteline

Commercial subcontractors managing complex billing workflows, multiple GC relationships, and compliance requirements for both themselves and lower-tiers consistently find that purpose-built A/R software delivers faster payments and fewer errors than project management tools with billing features added on. If that matches where your business is today, Siteline is worth a closer look. Schedule a demo.

Frequently Asked Questions

What is the main difference between Siteline and Knowify?

Siteline is a billing and A/R management software purpose-built for commercial subcontractors doing complex monthly progress billing, with full lien waiver management, custom GC form support, and direct integrations with GC payment portals. Knowify is a project management and job costing tool for small trade contractors, with AIA®-style billing capabilities built around a QuickBooks-first integration. The two tools solve different primary problems.

Does Knowify have lien waiver management?

No. Knowify does not currently offer lien waiver generation, collection, tracking, or management functionality. Subcontractors who need to collect and submit lien waivers as part of their billing workflow will need a separate tool or Siteline, which includes lien waiver management as part of its core platform.

Does Knowify integrate with GC payment portals like Textura or GCPay?

No. Knowify does not integrate with GC payment portals. Siteline does, which allows pay apps to be submitted to portals directly.

Can Knowify handle custom GC pay app forms?

Knowify generates standard G702® and G703® forms through its partnership with AIA Contract Documents. It does not support the custom pay app forms many GCs require. Siteline builds and stores custom forms for any GC, including pay apps, waivers, sworn statements, affidavits, and continuation sheets.

Which ERPs does Siteline integrate with?

Siteline integrates with Sage 300 CRE, Sage 100, Sage Intacct, Viewpoint Vista, Viewpoint Spectrum, Acumatica, CMiC, FOUNDATION, QuickBooks Online, and several others via API or structured file import. Knowify integrates only with the QuickBooks family (QuickBooks Online, QuickBooks Desktop, Intuit Enterprise Suite).

What is Siteline's average customer DSO?

Across Siteline's customer base, the average DSO is 52.6 days, compared to the 96-day industry average. Customers improve their DSO by an average of 16.7% within their first year of use.

Is Knowify good for commercial subcontractors?

Knowify works well for smaller commercial subcontractors who primarily need project management, estimating, and straightforward AIA®-style billing synced to QuickBooks. For fast-growing and mid-to-large commercial subcontractors managing high pay app volume, custom GC forms, multiple portal submissions, and lien waiver compliance, Knowify's billing functionality has meaningful gaps that Siteline addresses.