1PL, 2PL, 3PL, 4PL, 5PL — the terminology used to describe logistics service providers may seem obscure when encountered for the first time. Yet it underpins the entire supply chain outsourcing market. Understanding these levels means grasping who does what within the logistics value chain, and, above all, why each level entails radically different connectivity requirements. Here is an overview, with concrete examples from France.
The term “PL” (short for Party Logistics) emerged in the United States in the 1980s, as manufacturers and distributors began to outsource their logistics operations. The higher the “PL” level, the greater the proportion of the supply chain that the service provider manages — ranging from simple transport to the complete orchestration of the supply chain via digital platforms.
Five levels are now recognised, and a sixth (6PL) is emerging in the specialist literature. Each corresponds to a distinct degree of outsourcing and a distinct business model.
1PL refers to a situation where a company handles all its own logistics: transport, warehousing, order fulfilment and distribution. No external service providers are involved. This was the traditional model adopted by many manufacturers and retailers prior to the wave of outsourcing in the 1990s.
Today, pure 1PL remains in use mainly amongst certain manufacturers who regard logistics as a strategic competitive advantage — typically in the fresh food, luxury goods or pharmaceutical sectors, where end-to-end control is critical.
Examples: a major pharmaceutical group that operates its own refrigerated distribution centres, or a luxury leather goods manufacturer that manages its own workshops and warehouses.
2PL comes into play as soon as a company outsources some or all of its transport to an external service provider. It is the oldest and most common form of logistics outsourcing. 2PL is generally limited to the provision of transport services (road, rail, sea, air), sometimes supplemented by simple ancillary services such as temporary storage.
UK examples: Royal Mail, DHL Parcel UK, DPD UK, Yodel, Evri, and UPS UK for the transport sector.
This is the most common and fundamental service level on the market. The 3PL handles all physical logistics operations: warehousing, order fulfilment, stock placement, picking, packing, dispatch, and sometimes returns and reverse logistics. The 3PL operates from its own warehouses (owned or leased) and generally charges per pallet, per parcel, per operator-hour or per square metre of space occupied.
In the UK, 3PLs also represent a major share of the logistics market. Recent industry analyses value the UK contract logistics and 3PL market at around £20–25 billion per year, driven by e-commerce growth, increasingly complex supply chains, and strong pressure on delivery lead times.
UK examples: GXO Logistics, Wincanton, Clipper Logistics, DHL Supply Chain UK, CEVA Logistics, and XPO Logistics UK.
From a connectivity perspective, 3PL presents specific challenges: multi-client (multi-tenant) environments with strict segregation of application flows, integration of heterogeneous WMS systems depending on the shippers, high density of radio-frequency terminals, and stringent contractual requirements regarding network availability.
The 4PL represents a conceptual leap. A 4PL provider does not necessarily own physical assets (warehouses, a fleet of lorries): it coordinates, manages and optimises the supply chain by drawing on 3PL and 2PL partners. It acts as a conductor, solutions integrator, consultant and operator all at once.
The 4PL provides a unified end-to-end view: a consolidated dashboard, management of logistics KPIs, cost optimisation and change management. It is particularly relevant for large multinational groups with complex supply chains involving numerous suppliers and destinations.
Examples: Geodis 4PL, DHL Supply Chain (with its Lead Logistics Provider offering), GXO Direct, and Maersk with its supply chain management solutions.
The unique nature of 4PL gives rise to specific connectivity requirements: the interconnection of multiple information systems (WMS, TMS, ERP systems from different clients), the aggregation of real-time data from multiple sites, and multi-site monitoring from a single control centre.
The 5PL takes the 4PL concept a step further by incorporating a strong technological dimension: optimisation algorithms, artificial intelligence, predictive models and digital platforms that bring together all supply chain stakeholders. The 5PL does not merely manage logistics flows: it dynamically optimises them using data.
5PL is also an emerging category in the UK. It typically includes major e-commerce players that operate their own logistics and fulfilment platforms (such as Amazon Logistics and, historically, Ocado’s technology-led fulfilment model), as well as logistics technology providers that position themselves as data and platform orchestrators for multiple shippers and carriers.
Although mentioned in some recent academic papers, the concept of 6PL remains largely theoretical. It is said to describe a fully autonomous, self-learning supply chain, in which operational decisions are taken by AI systems in real time, without human intervention. To date, no player has formally claimed to be a 6PL — it is more of a projection for the coming decade than an operational reality.
| Level | Scope | Examples |
|---|---|---|
| 1PL | 100% in-house logistics | Pharmaceutical and luxury goods manufacturers |
| 2PL | Outsourced transport | Royal Mail, DHL Parcel UK, DPD UK, Yodel |
| 3PL | Outsourced warehouse operations and transport | GXO Logistics, Wincanton, Clipper Logistics |
| 4PL | Supply chain orchestration, management of service providers | Geodis 4PL, DHL LLP, GXO Direct |
| 5PL | Digital orchestration, AI optimisation | Amazon Logistics, digital platforms |
| 6PL | Autonomous cognitive supply chain (theoretical) | Emerging concept |
This terminology is not merely a matter of vocabulary. Depending on the level of service, the network infrastructure requirements of a logistics site vary significantly:
In any case, WiFi has ceased to be a mere convenience and has become a critical piece of production infrastructure. A network outage no longer affects office systems alone: it halts order picking, blocks voice-picking systems, puts AGVs into safety mode and freezes the RF terminals mounted on forklift trucks. This is why, regardless of the service level, the choice of network provider has become a strategic issue on a par with that of the WMS or the carrier.
The 1PL to 5PL classification system structures the French logistics market around five levels of outsourcing, with the boundary between 4PL and 5PL becoming increasingly blurred as digital platforms become more sophisticated. For a logistics director or a supply chain IT director, positioning their organisation (or partners) within this framework enables them to identify the right points of contact, the right technical architectures and the right levels of contractual commitment — including for connectivity, which is becoming a strategic issue cutting across all levels.
Further reading — If you are in charge of a network modernisation project at a logistics site, our strategic guide to logistics warehouse connectivity sets out the six key challenges to anticipate: radio coverage, 24/7 mission-critical operations, protocol coexistence, converged LAN, disruption-free deployment and OT cybersecurity. You can also explore our WiFi solutions for warehouses or read our case studies on the BBL Group and Conforama.