Analysis shows a decline in carrier collaboration in global liner services, impacting operational dynamics and service quality for shippers.
When freight forwarders arrange ocean bookings, a single trade lane will typically carry services from multiple carriers - yet the operational networks behind those services are not always as distinct as the branding suggests. Analysis published by maritime consultancy Sea-Intelligence indicates that the degree of sharing across global liner services is declining.
The data reveal that market sharing reached its peak between 2014 and 2016, when an average of 4.12 carriers marketed a single operated liner service under their respective brands. By August 2026, that figure had fallen to 2.65 carriers per service.
Vessel-sharing agreements represent a longstanding form of cooperation among liner operators, allowing carriers to pool capacity on a given service, share operating costs, and extend their port and route coverage. For shippers and freight forwarders, the practical implication has been that services offered under different carrier brands may, in fact, be carried on the same vessels along the same routing.
Sea-Intelligence data show that the total number of deep-sea liner services worldwide has grown from approximately 250 in 2012-2013 to close to 380 in 2026. Yet over the same period, the average number of carriers selling each operated service has declined. The global liner network, in other words, is expanding in scope - while the practice of multiple carriers jointly marketing a single service is becoming less prevalent.
Sea-Intelligence Chief Executive Alan Murphy has noted that liner networks are moving toward a more specialised operating model. A reduced reliance on shared capacity means carriers must independently assume a greater share of operational risk. This does not signal the end of inter-carrier cooperation, nor does it imply that all services will be operated on a standalone basis. Vessel-sharing agreements remain a feature of the liner market; however, aggregate data confirm that the extent to which a single service is sold by multiple carriers has diminished.
As the operational differences between competing branded services become more pronounced, rate comparisons demand a correspondingly greater level of diligence. Carriers operating on the same trade lane may differ meaningfully in port rotation, direct versus transshipment routing, sailing frequency, and effective transit time. When selecting an ocean service, shippers and forwarders should verify the actual vessel, routing, and estimated arrival time - not rely on the carrier brand alone as a proxy for service quality or equivalence. For cargo with firm delivery requirements in particular, brand recognition cannot substitute for an assessment of the specific voyage. Services that once appeared broadly similar in operational terms may, going forward, exhibit increasingly divergent performance characteristics.
The directional shift identified in the data is clear: the global liner network continues to expand, while the degree to which carriers share a single operated service is contracting. The operational differences between branded offerings are increasingly likely to manifest directly in booking decisions.
