For decades, ecommerce shipping in the United States has been dominated by familiar names such as USPS, UPS, and FedEx. But the last-mile delivery landscape is changing quickly.

Alternative carriers such as UniUni, OnTrac, and GOFO are expanding their networks, processing increasingly large parcel volumes, and becoming viable options for ecommerce retailers, marketplaces, 3PLs, and high-volume shippers.

UniUni now says it processes more than 1 million parcels per day. OnTrac says its network reaches more than 75% of U.S. online shoppers, while GOFO reported delivering more than 100 million U.S. packages in 2025.

These companies are becoming increasingly difficult for ecommerce and logistics businesses to ignore.

For businesses adopting more carriers, however, this growth creates another challenge:

How do you track packages consistently across an increasingly fragmented carrier network?

In this article, we'll look at the rapid growth of UniUni, OnTrac, and GOFO, why alternative last-mile carriers are becoming more important, and how developers can track all three through a single multi-carrier package tracking API.

What Are Alternative Last-Mile Carriers?

Alternative last-mile carriers are parcel delivery companies that provide businesses with additional options beyond traditional national carriers such as USPS, UPS, and FedEx.

Many focus heavily on ecommerce and use regional hubs, flexible delivery networks, technology-driven routing, automation, and high parcel density to provide competitive delivery services.

Instead of relying exclusively on traditional carriers, ecommerce companies can use alternative carriers as part of a diversified shipping strategy.

The trend has accelerated as ecommerce companies look for:

Three companies attracting particular attention in the U.S. parcel market are UniUni, OnTrac, and GOFO.

UniUni: Rapid Growth Across North America

UniUni has grown rapidly from its Canadian origins into a major North American ecommerce last-mile delivery network.

According to UniUni's 2025 growth report, the company expanded its delivery footprint to approximately 65% of the U.S. and 80% of Canada, reaching more than 500 North American cities by the end of 2025.

UniUni also reported a 1,073% increase in domestic parcel volume from 2024 to 2025.

The growth continued into 2026. UniUni said in May 2026 that it was processing more than 1 million parcels per day through a network of more than 100,000 registered drivers.

The company has also been investing heavily in automation. In March 2026, UniUni announced $85 million in additional funding and credit facilities intended to support automation, sorting equipment, working capital, and continued U.S. and Canadian network expansion.

Why Ecommerce Companies Are Looking at UniUni

UniUni is heavily focused on ecommerce last-mile delivery.

For a high-volume shipper, adding a carrier such as UniUni can provide another option when selecting a carrier based on destination, delivery expectations, cost, and network coverage.

But introducing a new carrier also means businesses need to think about more than just shipping labels.

They also need to consider:

Tracking becomes especially important because customers generally don't care which carrier is delivering their package.

They simply want to know:

Where is my order, and when will it arrive?

OnTrac: From Regional Carrier to Large Alternative Network

OnTrac has a much longer history than many of today's emerging last-mile delivery companies.

What has changed is the scale of its network.

Following the combination of the LaserShip and OnTrac networks, OnTrac has developed a large alternative parcel-delivery network covering a significant portion of the United States.

According to OnTrac, its network now reaches more than 75% of U.S. online shoppers across 35 states and Washington, D.C., serving 48 of the 50 largest U.S. metropolitan areas.

The company also operates seven days per week.

OnTrac has continued expanding its services for ecommerce merchants, marketplace sellers, and businesses looking for alternatives to traditional national parcel networks.

The company is also developing faster coast-to-coast services. Its OnTrac Express service is designed around hybrid air-and-ground transportation and advertises 2–3 day coast-to-coast delivery in supported markets.

Why OnTrac Matters for Multi-Carrier Shipping

One advantage of a multi-carrier shipping strategy is that every package doesn't have to follow the same route or carrier.

A retailer might determine that one carrier works particularly well for a specific geographic region while another provides better coverage, transit time, capacity, or economics elsewhere.

OnTrac gives shipping systems another carrier option when making those decisions.

As the network expands, developers also need to ensure that their order-management, customer-service, warehouse, and shipment-tracking systems can properly recognize and track OnTrac packages.

GOFO: A Rapidly Expanding U.S. Last-Mile Network

GOFO is a newer entrant to the U.S. market but has expanded remarkably quickly.

The company began its U.S. operations in Los Angeles in 2023 and has since developed a much larger delivery network.

According to GOFO's 2025 annual review, the company delivered more than 100 million packages across the United States during 2025.

By December 2025, GOFO reported that its network covered:

The company has also invested in large sorting facilities, automated package handling, intelligent routing, and coast-to-coast linehaul infrastructure.

GOFO's expansion continued into 2026, including the acquisition of CIRRO E-Commerce's U.S. operations.

Why GOFO Is Interesting

GOFO's rapid expansion demonstrates how quickly the U.S. last-mile market is changing.

Building a large parcel network traditionally required many years of infrastructure development.

Technology-driven routing, flexible delivery networks, automation, and the enormous package density created by ecommerce are helping newer carriers expand quickly.

For merchants, this means another potential shipping option.

For developers, it means:

another carrier that needs to be integrated into tracking systems.

UniUni vs. OnTrac vs. GOFO

Although all three companies compete in last-mile ecommerce delivery, their networks, histories, and strategies are different.

UniUni, OnTrac and GOFO: carrier overview
FeatureUniUniOnTracGOFO
Primary focusEcommerce last-mile deliveryAlternative parcel deliveryEcommerce last-mile delivery
Major marketsU.S. & CanadaU.S.U.S.
Package trackingYesYesYes
Ecommerce focusedYesYesYes
C2W Tracking API supportYesYesYes
Network statusRapid North American expansionLarge established alternative U.S. networkRapid U.S. expansion

Coverage and service availability can vary by ZIP code, customer agreement, service level, and network changes. Businesses evaluating any carrier should verify current coverage and service availability for their specific shipping profile.

Why Are Alternative Last-Mile Carriers Growing?

Cost is an obvious reason, but it isn't the only one.

Large ecommerce operations increasingly use multi-carrier shipping strategies.

Instead of sending every package through a single carrier, shipping systems can select carriers based on:

For example, a merchant might use USPS for one destination, OnTrac for another, UniUni in an area where its network provides a strong option, and GOFO for another group of ZIP codes.

This creates more competition in the last mile while giving shippers additional choices.

It can also reduce dependence on a single delivery network.

But there is a technical consequence.

Every additional carrier introduces another tracking system.

The Growing Challenge: Multi-Carrier Package Tracking

Adding a carrier isn't simply a matter of generating a shipping label.

Once a package leaves the warehouse, both the merchant and the customer still need visibility into its journey.

A business using several carriers may need to retrieve tracking information from:

Each carrier can have different tracking systems, event descriptions, status formats, APIs, authentication requirements, and integration methods.

One carrier might describe an event as:

Out for Delivery

Another carrier might use a different status code or description for essentially the same stage of the delivery process.

The same problem can occur with statuses such as:

For developers, maintaining separate tracking integrations becomes increasingly complicated as the number of carriers grows.

This is where a multi-carrier package tracking API becomes useful.

Track UniUni, OnTrac, and GOFO Through One API

Package Tracking API by C2W supports UniUni, OnTrac, and GOFO, along with major carriers including USPS, UPS, FedEx, DHL Express, and DHL eCommerce.

Instead of maintaining a separate tracking integration for every supported carrier, developers can use the C2W multi-carrier Package Tracking API to retrieve package tracking information through a common API.

This can be particularly useful for:

An application can submit a tracking number and receive structured tracking information that can then be displayed to customers or used by internal systems.

One Tracking Integration for Traditional and Alternative Carriers

As ecommerce shipping becomes more diversified, businesses may find themselves working with both traditional carriers and newer last-mile delivery networks.

The Package Tracking API by C2W provides a single integration for supported carriers including:

This allows developers to support multiple carriers without building and maintaining a completely separate tracking integration for each one.

That becomes increasingly important as ecommerce companies continue adding new delivery partners.

Why a Unified Tracking API Matters More as Carrier Networks Fragment

The rise of UniUni, OnTrac, GOFO, and other alternative carriers represents more than additional choices for shipping departments.

It changes the software architecture required to support shipping.

Consider an ecommerce company using seven carriers.

Without a multi-carrier tracking service, its development team may need to maintain:

And when another carrier is introduced, another integration may have to be developed.

A unified tracking API creates an abstraction layer between the ecommerce application and the underlying carriers.

Instead of:

Your Application → USPS Tracking API

Your Application → UPS Tracking API

Your Application → FedEx Tracking API

Your Application → UniUni Tracking API

Your Application → OnTrac Tracking API

Your Application → GOFO Tracking API

the architecture can become:

Your Application → Multi-Carrier Package Tracking API → Multiple Carriers

The application communicates with one tracking interface while the tracking service handles the supported carrier integrations behind it.

This becomes increasingly valuable as the parcel-delivery market becomes more diversified.

Tracking Should Be Part of the Carrier Selection Process

Tracking quality can also become an important consideration when evaluating a new delivery partner.

Shipping cost and transit time are important, but ecommerce businesses should also consider what happens after the shipping label is generated.

Questions worth asking include:

These issues become increasingly important as shipping volumes grow.

A carrier might provide attractive rates, but limited tracking visibility can generate additional customer-service inquiries such as:

Where is my order?

That creates costs elsewhere in the organization.

For this reason, tracking should be considered part of the overall carrier-integration strategy rather than something added after the shipping integration is completed.

Multi-Carrier Shipping Is Also a Software Problem

Shipping departments naturally think about carrier rates, coverage, capacity, and transit times.

Development teams see another side of the problem.

Every new carrier potentially means:

Another API.

Another authentication mechanism.

Another set of status codes.

Another response structure.

Another integration that eventually needs maintenance.

This is why multi-carrier tracking infrastructure can become particularly valuable for ecommerce companies that frequently evaluate or introduce new delivery services.

If a company's internal applications communicate with a common tracking interface, adding another supported carrier can become considerably easier than redesigning every application that consumes tracking information.

Alternative Carriers Are Becoming Part of Mainstream Ecommerce

The scale these carriers are beginning to achieve illustrates how much the parcel market is changing.

UniUni says it processes more than one million parcels per day.

OnTrac says its network reaches more than 75% of U.S. online shoppers and 48 of the top 50 U.S. metropolitan areas.

GOFO reported delivering more than 100 million U.S. packages in 2025, with its network reaching more than 70% of the U.S. population by the end of that year.

These aren't insignificant delivery networks.

Alternative carriers are increasingly becoming part of mainstream ecommerce logistics strategies.

Traditional carriers such as USPS, UPS, and FedEx will continue to play enormous roles in parcel delivery, but merchants now have more options when optimizing:

For developers, logistics teams, and ecommerce platforms, that means carrier-integration strategies also need to evolve.

Shipping may become more fragmented.

Tracking doesn't have to be.

Frequently Asked Questions

What is an alternative last-mile carrier?

An alternative last-mile carrier provides parcel-delivery services outside the traditional national carrier networks. Companies such as UniUni, OnTrac, and GOFO are examples of carriers increasingly being used for ecommerce deliveries in the United States and North America.

Is UniUni a last-mile carrier?

Yes. UniUni operates a technology-driven last-mile delivery network focused heavily on ecommerce shipments in the United States and Canada. The company says its network currently covers approximately 65% of the U.S. and 80% of Canada.

Is OnTrac a national carrier?

OnTrac operates a large U.S. parcel network covering a substantial portion of the country's population and major metropolitan areas. Its network currently reaches more than 75% of the U.S. population across 35 states and Washington, D.C. Coverage should still be checked for a specific destination.

What is GOFO?

GOFO is a technology-driven last-mile parcel-delivery company operating in the United States. The company reported delivering more than 100 million U.S. packages during 2025 and operating across more than 40 states with 120+ hubs and stations by the end of the year.

Can I track UniUni packages through an API?

Yes. Package Tracking API by C2W supports UniUni tracking, allowing developers to retrieve UniUni package tracking information programmatically.

Does C2W support OnTrac tracking?

Yes. OnTrac is supported by Package Tracking API by C2W, allowing applications to retrieve OnTrac tracking information through the same API used for other supported carriers.

Can I track GOFO packages using an API?

Yes. GOFO tracking is supported by Package Tracking API by C2W.

Can one API track UniUni, OnTrac, and GOFO?

Yes. The Package Tracking API by C2W supports all three carriers, allowing developers to integrate UniUni, OnTrac, and GOFO tracking through a common package tracking API.

What other carriers does C2W Package Tracking API support?

In addition to UniUni, OnTrac, and GOFO, Package Tracking API by C2W supports major carriers including USPS, UPS, FedEx, DHL Express, and DHL eCommerce.

Why use a multi-carrier tracking API instead of integrating with each carrier directly?

A multi-carrier tracking API can reduce the amount of carrier-specific development and maintenance an application requires.

Instead of building separate tracking integrations for every supported carrier, developers can retrieve tracking information through a common interface.

This can be especially useful for ecommerce platforms, WMS systems, 3PLs, marketplaces, and other applications processing shipments from multiple carriers.

The Future of Last-Mile Package Tracking

The rapid expansion of UniUni, OnTrac, GOFO, and other alternative carriers suggests that ecommerce delivery will continue moving toward a more diversified carrier ecosystem.

For shippers, more carrier choices can provide greater flexibility and competition.

For developers, however, more carriers can mean more integrations to build and maintain.

That's why tracking infrastructure needs to evolve alongside shipping infrastructure.

Package Tracking API by C2W provides a single tracking API for traditional and alternative carriers, including USPS, UPS, FedEx, DHL, UniUni, OnTrac, and GOFO.

Instead of building individual tracking integrations every time a new delivery partner is introduced, developers can use a common API across supported carriers.

As the last-mile delivery market continues to evolve, this type of unified tracking layer can make it easier for ecommerce businesses, warehouse systems, shipping platforms, 3PLs, and software developers to adopt new carriers without rebuilding their tracking infrastructure each time.

Learn more about the Package Tracking API by C2W and how to integrate multi-carrier package tracking into your application.

Sources & References

The carrier growth, coverage, and parcel-volume figures referenced in this article are primarily based on information published by the carriers themselves. Carrier networks change frequently, so businesses should verify current service availability directly with each carrier.

UniUni

2025 Growth and Network Expansion

UniUni reported that its delivery footprint expanded to 65% of the U.S. and 80% of Canada, reaching more than 500 North American cities by the end of 2025. It also reported a 1,073% increase in domestic parcel volume from 2024 to 2025.

UniUni — 2025 Growth, Partnerships and Industry Recognition

2026 Scale

In May 2026, UniUni said it was processing more than 1 million parcels daily through a network of more than 100,000 registered drivers.

UniUni — North American Ecommerce Last-Mile Delivery Platform

OnTrac

OnTrac says its network reaches more than 75% of U.S. online shoppers across 35 states and Washington, D.C., including 48 of the 50 largest U.S. metropolitan areas.

OnTrac — Marketplace Network Expansion

OnTrac also describes its newer express offering as providing 2–3 day coast-to-coast delivery through hybrid air-and-ground lanes in supported markets.

OnTrac — Express Delivery

GOFO

GOFO reported delivering more than 100 million packages in the United States in 2025. As of December 2025, the company said its network covered more than 40 states, 120+ hubs and stations, and 8,500+ ZIP codes, reaching more than 70% of the U.S. population.

GOFO — 2025 Annual Review

About Package Tracking API by C2W

Package Tracking API by C2W is a multi-carrier package tracking API designed for developers, ecommerce platforms, warehouse management systems, 3PLs, marketplaces, and high-volume shipping operations.

The API supports traditional carriers and rapidly growing alternative last-mile delivery networks, including:

USPS • UPS • FedEx • DHL Express • DHL eCommerce • UniUni • OnTrac • GOFO

Instead of building and maintaining a separate tracking integration for every supported carrier, developers can use a common API to retrieve package tracking information.

Learn more about the C2W Multi-Carrier Package Tracking API