Top 4 Accounting & Billing Providers for 3PLs (2025)

40Seas is a fintech startup dedicated to transforming cross-border trade finance with innovative, digital-first solutions. Their platform provides small and medium-sized importers and exporters a modern substitute for traditional B2B payment and financing methods. By leveraging data-driven technology, 40Seas simplifies cross-border trade processes, offering faster, cost-effective access to working capital. This empowers businesses to enhance cash flow, boost sales, and expedite growth without depending on conventional financial institutions. Committed to rewriting the rules of trade finance, 40Seas is positioned as a best-in-class provider in the financial services industry.

Automate your billing with Margin. Create invoices with net terms and metered billing. Automatically reconcile carrier label costs to protect margins. Set custom charge rules so you bill exactly how you want. Provide clients with a transparent dashboard to see charges and download invoices. Consult directly with Cat (former 3PL operator) for strategies to fix cash-flow strain. Fix your cash flow today.

Portal Warehousing provides flexible and scalable warehousing solutions across various US locations including Brooklyn, Phoenix, Orlando, Los Angeles, and Salt Lake City. They specialize in offering high-quality small to medium-sized warehouse spaces that cater to businesses ranging from startups to large enterprises. With no long-term lease commitments, their turn-key spaces come equipped with essential amenities including private offices, superb security, and super-fast internet. Additionally, Portal Warehousing supports business growth through a host of services like community events, growth support, reception services, and technology partnerships. They also provide easy monthly billing, shipping and receiving addresses, utilities, and daily carrier pickups. By reimagining warehousing, Portal Warehousing ensures enterprises can focus on their growth with convenience and ease. They operate on a flexible membership structure, allowing businesses to choose from a range of access levels and corresponding fees, aligning perfectly with diverse operational needs and providing a collaborative environment to foster growth and innovation. Their mission centers on redefining the warehousing experience to elevate and support business operations through comprehensive, adaptable services.

Rails is a SaaS platform that consolidates and fully automates financial operations such as client billing and supplier bill reconciliation for fulfillment 3PLs. 3PLs using Rails have seen savings of 20+ accounting labor hours, eliminated billing errors to the tune of 10% of the total invoice amount, and sent out bills within hours of the billing period ending while previously having taken days to do so. Users have also improved profitability by efficiently implementing dynamic client billing agreements, and identified lost revenue by reconciling carrier bills and charging clients for adjustments automatically. Rails integrates with a 3PL’s existing WMS, carriers, and accounting system through one-click integrations and brings in data as it is recorded in each system to enable real-time billing and reconciliation. Rails primarily works with 3PLs offering small-parcel fulfillment services such as outbound shipping (including services such as FBA), storage, etc. of all sizes (from 100 orders/month to 100,000+ orders/month). The only requirement is that the 3PL use a WMS for recording operations