• Manually checking rates across multiple carrier portals for every shipment -- costing time and leaving rate savings on the table?

  • Fragmented tracking data across multiple carrier systems making it impossible to give customers a consistent view of their shipments?

Multi-Carrier Shipping Software Development

Shipping software built for multi-carrier operations -- rate shopping across your carrier network, automated carrier selection, label generation, unified tracking, and carrier invoice reconciliation in one platform.

Built for ecommerce operators, fulfilment centres, and logistics platforms shipping with multiple carriers who need to automate what currently requires manual carrier portal access.

  • Rate shopping across your full carrier network with automated carrier selection rules

  • Label generation and carrier API integration for all your carriers

  • Unified tracking timeline aggregated across all carriers into a single view

  • Carrier invoice reconciliation identifying overbilling and rate discrepancies

RaftLabs builds custom multi-carrier shipping software -- rate shopping engines comparing quotes across FedEx, UPS, USPS, DHL, and regional carriers; automated carrier selection based on cost, service level, and lane; label generation and carrier API integration; unified tracking across all carriers; and carrier invoice reconciliation. Multi-carrier shipping software is appropriate for ecommerce operators, fulfilment centres, and logistics platforms that ship with multiple carriers and need to automate carrier selection and rate comparison. Most multi-carrier shipping platform projects deliver in 8--14 weeks at a fixed cost.

Vodafone
Aldi
Nike
Microsoft
Heineken
Cisco
Calorgas
Energia Rewards
GE
Bank of America
T-Mobile
Valero
Techstars
East Ventures
RateShopping across carriers
UnifiedTracking across all carriers
AutomatedCarrier selection
FixedCost delivery

Manual carrier selection is a solvable problem. Rate shopping should be automatic.

When you ship with three or more carriers, manual rate comparison is a tax on every shipment. Your warehouse team checks each carrier's portal, picks a carrier based on incomplete information, and the operation scales linearly with volume -- more shipments means more manual work, not more automation.

Multi-carrier shipping software automates rate shopping, applies your carrier selection rules automatically, generates labels via API without manual portal access, and aggregates tracking data across all carriers so your customers get a single view of their shipments.

What we build

Rate shopping engine

Real-time rate quotes from all your carriers in a single API call -- parcel carriers (FedEx, UPS, USPS, DHL Express), regional carriers, and LTL carriers where applicable. Rate normalisation presenting comparable service levels across carriers: ground, 2-day, next-day, and equivalent regional carrier services. Transit time and estimated delivery date included with each rate. Negotiated rate application using your account-specific rates, not published list rates. The rate comparison your team currently does manually, automated.

Automated carrier selection

Rule-based carrier selection that picks the right carrier for each shipment automatically -- without requiring a human to review rates. Selection rules based on: cheapest rate for service level, preferred carrier for specific zones or lanes, carrier weight and dimension limits, delivery date requirements, product type restrictions, and customer-specified carrier preferences. Override capability for your operations team when specific shipments need manual carrier selection. The automation that removes carrier selection from your per-shipment workflow.

Label generation and carrier API

Label generation via carrier API for all your carriers -- FedEx Web Services, UPS API, USPS Web Tools, DHL Express API, and regional carrier APIs. Label format handling: thermal (ZPL, EPL), PDF, and PNG. Carrier-specific required fields, package types, and service codes handled per carrier. Domestic and international shipping label generation with customs forms (CN22, CP72, commercial invoice) for international shipments. The label generation layer your warehouse team uses without carrier portal access.

Unified shipment tracking

Tracking event ingestion from all carriers via API polling and webhook where carriers support it. Normalisation of carrier-specific tracking events into a consistent status model: picked up, in transit, out for delivery, delivered, exception. Unified tracking API and customer-facing tracking page showing all shipments regardless of carrier in a single view. Exception identification and alerting for delayed or problem shipments across your carrier network. Proof of delivery collection and storage per carrier.

Customer notifications

Automated customer notifications triggered by tracking events: shipment booked, picked up, in transit, out for delivery, delivered. Email and SMS notification options. Branded notification emails matching your company identity. Customer tracking page access from notification links -- no carrier portal required. Delivery exception notifications for delayed or returned shipments. The outbound communication that keeps your customers informed without manual status update emails from your team.

Carrier invoice reconciliation

Automated matching of carrier invoices against the rates quoted and booked at shipment time -- identifying overbilling, incorrect surcharge application, and accessorial charges not in your rate agreement. Exception workflow for disputing charges with carrier billing teams. Recovery tracking and reporting over time. Cost-per-shipment analysis by carrier, service level, and origin/destination zone. The freight audit that identifies the billing errors carriers regularly make, automatically rather than manually.

Frequently asked questions

We integrate with API-capable parcel and freight carriers: FedEx (REST API), UPS (OAuth API), USPS (Web Tools and USPS APIs), DHL Express API, Purolator (Canada), Canada Post, and most regional parcel carriers with REST or SOAP APIs. For carriers without public APIs, we integrate via EasyPost or ShipEngine as a normalisation layer -- they support 100+ carriers under a single API. We confirm carrier integration approach for each carrier during scoping, as API capabilities vary significantly (some carriers support full rate/book/track; others only one or two functions).

Carrier selection rules are configured per your business logic and applied automatically at shipment creation. Common rule patterns: select cheapest carrier meeting the required service level; prefer Carrier A for Zone 1--4 shipments, Carrier B for Zone 5--8; exclude Carrier C for hazmat shipments; use regional carrier for next-day delivery in specific states where they're faster than nationals. Rules can be combined and prioritised. When multiple rules apply, the priority order determines which rule wins. Rules are managed via an admin interface -- your operations team can update rules without a developer. Edge cases that don't match any rule escalate for manual selection.

Yes. Multi-carrier shipping is commonly built as a standalone service that integrates with your existing ecommerce platform (Shopify, Magento, WooCommerce) or WMS. We expose a shipping API that your platform calls to get rates and book shipments, and we push tracking data back to your platform via webhook. This approach means the multi-carrier logic lives in one place and serves multiple systems -- your ecommerce platform, warehouse management system, and customer-facing order tracking all consume the same shipping layer. Integration scope depends on your existing platform's API capability.

A multi-carrier shipping platform with rate shopping (3--5 carriers), automated selection rules, label generation, unified tracking, and customer notifications typically runs $25,000--$60,000. A full platform with 8+ carrier integrations, LTL support, EDI integration, invoice reconciliation, and customer portal typically runs $60,000--$130,000. Cost depends on carrier count, EDI requirements, and the complexity of the selection rules and reporting requirements. We scope every project before pricing it.

Talk to us about your multi-carrier shipping project.

Tell us the carriers you work with, the shipment volume you're handling, and what your current process requires manually. We'll scope the right platform and give you a fixed cost.