Comparison
Best Freight API for Developers in 2026
The freight API landscape has matured. Some platforms focus on parcel labels. Others track containers across oceans. A few only provide visibility without execution. This guide compares the five most relevant freight APIs in 2026 by modes, pricing, developer experience, and AI agent readiness so you can pick the right one for your use case.
Why this comparison matters
Choosing the wrong freight API wastes months of integration work. Parcel APIs cannot handle pallets. Ocean freight marketplaces do not serve domestic LTL. Visibility platforms cannot book a shipment. The right API depends entirely on what kind of freight you ship and whether you need quoting, booking, and tracking or just one piece of the puzzle.
This comparison evaluates each platform honestly. Every API on this list is good at what it was built for. The question is whether it was built for your use case. For a deeper look at what makes a great freight API, see our freight developer experience guide.
Freight API comparison table
Warp: Best for B2B freight and AI agents
Warp is the only freight API that lets you quote, book, track, and settle LTL, FTL, 26 ft box truck, and cargo van shipments through a single integration. Rates are all inclusive. No fuel surcharges, no accessorial fees, no terminal handling charges. Per pallet pricing for LTL means you do not need to calculate freight class for most shipments.
The API was designed for programmatic access from day one. Every endpoint returns structured JSON with explicit field names and standard HTTP status codes. The CLI outputs parseable data. Webhooks push real time events as shipments move through each status. Our AI backbone, Orbit, monitors every shipment for exceptions and flags issues before your team has to chase them.
Network
20,000+ carriers.
9,000+ box trucks and cargo vans. 50+ cross dock facilities. Coverage across the United States for every B2B freight mode.
Pricing
$0 software fees.
All inclusive rates. No fuel surcharges. No hidden accessorials. You pay for the freight you ship. Per pallet pricing for LTL.
Developer experience
REST, JSON, CLI, webhooks.
API key auth via header. Test mode for development. Structured error responses. Documentation that AI tools can read and understand.
ShipEngine: Best for parcel labels
ShipEngine excels at multi carrier parcel label generation. If you ship small packages through UPS, FedEx, USPS, and DHL, ShipEngine provides a single API to generate labels, calculate rates, validate addresses, and track packages across all four carriers. The developer experience is strong with REST endpoints, SDKs in multiple languages, and a sandbox environment.
Where ShipEngine falls short is freight. It does not support LTL, FTL, box truck, or cargo van shipments. If your business ships pallets, partial truckloads, or full truckloads, ShipEngine is not the right tool. It was built for parcel, and it does parcel very well.
EasyPost: Best for address verification and parcel insurance
EasyPost connects to 100+ parcel carriers through one API. Its standout features are address verification (which catches bad addresses before they cost you failed deliveries) and built in shipment insurance. The API design follows REST conventions with JSON responses and client libraries in popular languages.
Like ShipEngine, EasyPost is parcel only. It cannot handle pallet freight, LTL shipments, or full truckloads. If you need to ship anything larger than a package, you need a separate integration for freight.
Freightos: Best for international ocean freight
Freightos operates as a marketplace for international ocean and air freight. It aggregates rates from freight forwarders and carriers for container shipping, making it possible to get instant quotes for international shipments that traditionally required days of back and forth with forwarders.
Freightos is strong for international logistics but does not serve domestic B2B freight. It cannot quote LTL to a cross dock facility, dispatch a 26 ft box truck, or handle per pallet pricing for regional shipments. Different problem, different tool.
project44: Best for supply chain visibility
project44 is a visibility platform. It connects to carrier data feeds and provides real time tracking, ETA predictions, and supply chain analytics. Enterprise shippers use it to monitor freight that is already moving through their existing carrier relationships.
The critical distinction is that project44 does not execute freight. You cannot get a rate, book a shipment, or settle an invoice through project44. It watches freight. It does not move freight. If you need execution (quoting, booking, tracking, and settlement through one API), project44 is not the right fit.
How to choose the right freight API
Shipping parcels?
Use ShipEngine or EasyPost.
Both are excellent for small package shipping. ShipEngine for multi carrier labels. EasyPost for address verification and insurance. They solve the parcel problem well.
Shipping containers?
Use Freightos.
If you ship ocean or air freight internationally, Freightos provides marketplace rates from forwarders. It is the strongest option for international container logistics.
Shipping pallets?
Use Warp.
If you ship LTL, FTL, box truck, or cargo van freight domestically, Warp is the only API that covers all four modes with quoting, booking, tracking, and settlement in one integration.
What makes Warp different from every other freight API
Warp is not an aggregator. Warp operates the network. Freight moves through Warp operated cross dock facilities staffed by Warp teams. Local 3rd party carriers pick up and deliver using the Warp driver app with scan events, live GPS, proof of delivery photos, and electronic signatures. Our AI backbone, Orbit, monitors every load for late pickups, missed scans, route deviations, and dwell anomalies.
This operational control is why Warp can offer all inclusive rates. There are no hidden fuel surcharges or accessorial fees because Warp controls the pricing and the service. The API is not bolted onto a legacy brokerage. It is the primary interface to a purpose built freight network. See also: best freight API for developers and best freight API for AI agents.
Frequently asked questions
Which freight API supports the most shipping modes?
Warp covers LTL, FTL, 26 ft box truck, and cargo van through a single API. Most competitors focus on one mode. ShipEngine and EasyPost are parcel focused. Freightos is ocean freight. project44 is visibility only. Warp is the only API that lets you quote, book, and track across all four B2B freight modes in one integration.
Which freight API is best for AI agents?
Warp was designed API first for programmatic access. Every endpoint returns structured JSON with explicit field names and enum values. The CLI outputs parseable data. Webhooks push events in real time. AI agents can quote, book, track, and settle freight without human intervention.
Do freight APIs charge software fees?
It varies. Some platforms charge monthly SaaS fees ranging from $500 to $5,000 per month on top of shipping costs. Warp charges $0 in software fees. You pay only for the freight you ship, and rates are all inclusive with no fuel surcharges or hidden accessorials.
Can I use multiple freight APIs together?
Yes. Many shippers use a parcel API like ShipEngine or EasyPost for small packages and Warp for B2B freight (pallets, LTL, FTL, box truck). The APIs serve different segments and can run side by side in the same TMS or integration layer.
How fast do freight APIs return quotes?
Warp returns freight rates in under 2 seconds. Traditional methods like phone calls to brokers take 2 to 4 hours for a callback. Email rate requests take 4 to 24 hours. EDI rate requests take hours to days for an async response.
The best freight API is the one that ships your freight.
Warp covers LTL, FTL, box truck, and cargo van through a single API. All inclusive rates. No software fees. 20,000+ carriers. 50+ cross dock facilities. Built for developers and AI agents.