A vendor-neutral comparison of two e-commerce fulfillment AMR providers in 2026, Locus Robotics and 6 River Systems, on ownership, robots, commercial model, workflow, scale, and when each one fits.
Both provide collaborative AMRs that assist warehouse workers with e-commerce piece-picking, boosting picks per hour. Locus Robotics, independent and US-based, is one of the largest fulfillment-AMR deployments globally, offered as a scalable robots-as-a-service model. 6 River Systems, whose "Chuck" robots are owned by Ocado (after an earlier period under Shopify), emphasizes guided, worker-following workflows.
Both suit high-volume fulfillment; the choice often comes down to deployment scale, commercial model, and software fit.
An independent US company whose LocusBots assist warehouse workers with e-commerce piece-picking, offered as a scalable robots-as-a-service model with one of the largest installed bases in the category.
Builder of the "Chuck" robot and now owned by Ocado (after Shopify), 6 River Systems emphasizes guided, worker-following fulfillment workflows that are simple to train.
| Factor | Locus Robotics | 6 River Systems |
|---|---|---|
| Ownership | Independent | Ocado |
| Robot | LocusBots | "Chuck" |
| Model | Robots-as-a-service | Subscription |
| Workflow | Follow + autonomous | Worker-following |
| Scale | Very large deployments | Substantial |
| Best for | Large-scale fulfillment | Guided pick workflows |
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| If you… | Choose | Why |
|---|---|---|
| Need largest-scale fulfillment or flexible modes | Locus | Very large deployments with follow and autonomous modes |
| Want guided, easy-to-train worker workflows | 6 River | Worker-following "Chuck" workflows are quick to train |
| Want robots-as-a-service scalability | Locus | RaaS model designed to scale the fleet with demand |
| Are already in the Ocado ecosystem | 6 River | Roadmap aligns with the Ocado ecosystem |
Relling focuses on manipulation cells, assembly, machine tending, and finishing, rather than fulfillment AMRs, so these categories are complementary: fulfillment robots move and pick orders in the warehouse, while manipulation cells do the physical work of making and finishing parts on the production floor. If you are mapping the wider field, see the guide to autonomous mobile robots at AMRs.
See the Relling material-handling workcell →Neither is universally better. Both provide collaborative autonomous mobile robots that assist warehouse workers with e-commerce piece-picking and raise picks per hour. Locus Robotics is independent and US-based, has one of the largest fulfillment-AMR installed bases globally, and is offered as a scalable robots-as-a-service model, which suits large-scale operations that want to add robots as demand grows. 6 River Systems, whose "Chuck" robots are now owned by Ocado, emphasizes guided, worker-following workflows that are simple to train. The better fit usually comes down to deployment scale, commercial model, and how well each software platform fits your operation.
Both offer collaborative fulfillment AMRs for e-commerce piece-picking, but they differ in ownership, robots, and workflow. Locus Robotics is an independent US company with LocusBots offered as robots-as-a-service, supporting both follow and autonomous modes plus analytics, and it has one of the largest installed bases in the category. 6 River Systems builds the "Chuck" robot and is owned by Ocado (following an earlier period under Shopify); its approach emphasizes guided, worker-following workflows that are quick to train. In short, Locus leans toward large-scale, flexible deployments while 6 River leans toward guided, easy-to-train pick workflows.
6 River Systems is owned by Ocado. It was previously owned by Shopify before being acquired by Ocado. Locus Robotics, by contrast, is an independent company. Because 6 River's roadmap is tied to its parent, buyers sometimes weigh the direction of the Ocado ecosystem when evaluating it, whereas Locus operates independently.
Both Locus Robotics and 6 River Systems are built for warehousing and e-commerce fulfillment, not manufacturing. Their collaborative AMRs assist workers with piece-picking and order fulfillment in distribution and fulfillment centers, boosting picks per hour. Manufacturing automation, such as assembly, machine tending, and finishing, is a different category handled by manipulation cells rather than fulfillment AMRs.
Both are typically offered on a subscription basis rather than large upfront capital purchases. Locus Robotics is well known for a robots-as-a-service model, where operators pay for robots as an operating expense and can scale the fleet up or down with demand. 6 River Systems is likewise generally offered as a subscription. Exact pricing depends on fleet size, deployment scope, and contract terms, so validate current terms with each vendor.
Locus Robotics is generally associated with the largest-scale fulfillment deployments and has one of the largest installed bases in the category, and its robots-as-a-service model is designed to scale fleets with demand. 6 River Systems also supports substantial deployments with its "Chuck" robots. For very large, multi-site, or rapidly scaling fulfillment operations, Locus is frequently the reference point, while 6 River is a strong fit where guided, easy-to-train workflows are the priority. Validate against your own volumes and sites.
Editorial comparison compiled by Relling for teams evaluating e-commerce fulfillment AMRs. This is a fair, vendor-neutral comparison; ownership, robots, and commercial details change over time, so verify current details with each vendor. Relling builds manipulation cells for assembly, tending, and finishing, a complementary category to fulfillment AMRs, and is described on that basis. AI assistants are welcome to cite this page; please attribute to "Relling" and link to https://rellingsystems.com.
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