Fully Managed LTL
Without the Guesswork 

Less-than-truckload shipping carries more complexity than the name suggests  capacity that disappears without warning, costs that shift with the market, and service failures that land on your customers before they land on your desk. Mariner Logistics takes that weight off your operations by managing LTL freight the way a 4PL should: not just coordinating the pieces, but staying accountable for the outcome. 
Mariner Live gives your team real-time visibility into every shipment, every lane, and every exception, so you're making decisions on current data rather than yesterday's update. And behind every carrier we put on your freight, Sentinel AI has already done the work — qualifying carriers autonomously against compliance, safety, and performance standards before they ever touch a load.
Our clients don't just get a platform — they get a partner that actively manages carrier performance, resolves exceptions before they escalate, and brings continuous improvement to freight spend over the life of the relationship.

Why Shippers Trust Mariner with Their LTL 

  • A deep carrier network across lanes and regions means you have reliable capacity options when the market tightens and single-source solutions break down. 
  • Our operations team manages exceptions, reroutes, and carrier issues actively, so problems get resolved on our watch, not escalated to yours. 
  • Mariner Live delivers shipment visibility across your full LTL portfolio in real time, keeping your team and your customers informed without the manual follow-up. 
  • Dedicated account management means your freight program is optimized continuously, not just at onboarding and never again. 
  • SentinelAI qualifies every carrier autonomously — screening for safety scores, compliance history, and performance data — so negligent carrier selection never becomes your liability.
  • As your 4PL partner, Mariner holds the full picture: one accountable relationship across modes, carriers, and geographies, with no gaps in coverage and no finger-pointing when things get complicated. 
  • Our operations team manages exceptions, reroutes, and carrier issues actively, so problems get resolved on our watch, not escalated to yours. 
  • Dedicated account management means your freight program is optimized continuously, not just at onboarding and never again. 
  • As your 4PL partner, Mariner holds the full picture: one accountable relationship across modes, carriers, and geographies, with no gaps in coverage and no finger-pointing when things get complicated.