Steward vs SwarmBot
Two autonomous tractor machines, one verified table. Every figure below is sourced and dated; vendor claims are labelled and kept apart from independent results.
US aftermarket kit (proprietary control unit + dual-GNSS + cameras/obstacle sensors) that converts existing 80-150hp tractors — John Deere 5E/5M/6E, Kubota M5 and Fendt 700-series (Deutz-Fahr in development) — into autonomous units for mowing, seeding, tillage, rolling, hay cutting and (via a Verdant Robotics partnership) precision spray. Installed in roughly a day (press reports range from a few hours to two days) with a five-minute calibration; sold through Trimble's Vantage dealer network in the US and Canada, with roughly 300 systems operational as of mid-2026. A July 2026 oversubscribed Series B led by Leaps by Bayer, with Yara participating, is funding expansion.
Best for: US/Canadian row-crop, broad-acre and sod/turf operations with an existing fleet of compatible 80-150hp tractors who want autonomy without buying new large-horsepower machines — Sabanto pitches "gangs" of several sub-150hp tractors as a lower-capital alternative to one big autonomous unit.Australian autonomous farming platform from SwarmFarm Robotics (Gindie, near Emerald, QLD) — a diesel-powered (86 HP), ISOBUS-connected carrier chassis that autonomously drives interchangeable implements (spot-sprayers incl. Weed-It, mowers, spreaders) across broadacre grain and cotton paddocks, rather than one dedicated tool; categorised here as "tractor" for that reason, with spraying/mowing/spreading sold as attachment packages. Commercially available in Australia since 2018 (current generation SwarmBot 5; TRL 10, ~120 units in service, over 5,000,000 acres worked); not sold or serviced outside Australia.
Best for: Broadacre Australian grain and cotton growers (SwarmFarm's own case studies run ~2,000 ha) wanting a diesel-powered, multi-implement autonomous platform for fallow spot-spraying, mowing and spreading, bought or leased direct from the manufacturer.| Steward Verified 2026-07-18 | SwarmBot Verified 2026-07-18 | |
|---|---|---|
| Overview | ||
| Task | Autonomous tractor | Autonomous tractor |
| Autonomy | Fully autonomous | Fully autonomous |
| Country of origin | United States | Australia |
| Availability | Available now | Available now |
| EU market | Pending | Pending |
| Lead time | Not disclosed | Not disclosed |
| Last verified | 2026-07-18 | 2026-07-18 |
| Specifications | ||
| Power source | Retrofit kit powered by the host tractor's own diesel powertrain — no dedicated power source of its own | Diesel-powered self-propelled platform · 86 HP engine |
| Required tractor power | Aftermarket retrofit centred on 80-150hp tractors; compatible models include John Deere 5E (5075E, 5085E, 5090E, 5100E), 5M (5090M, 5095M, 5100M, 5105M, 5115M, 5120M, 5130M) and 6E (6105E, 6120E, 6135E cab-only) series, Kubota M5 (M5-091, M5-111), and Fendt 700-series (model year 2022+); Deutz-Fahr support is in development. Requires an electronic shuttle (PowrReverser) and factory grill guard on the host tractor | Not required — self-propelled autonomous carrier (86 HP diesel) |
| Dimensions | Not disclosed | Not disclosed |
| Weight | Not disclosed | 2.5 tonnes (SwarmBot 5, current generation); earlier/smaller platform variants reported lighter — exact figure varies by configuration |
| Min farm size | Not disclosed | Not disclosed by SwarmFarm; case-study deployments are on 2,000+ ha broadacre grain/cotton properties |
| Productivity | Roughly 300 systems operational across North America as of mid-2026 (Farmers Weekly); one large customer runs 25 units simultaneously (AgFunderNews); sod-farm customer Super-Sod runs 11 units across the southeastern US (Trimble customer story) | Up to 1,000 acres (400 ha) per day for field spraying operations |
| Max speed | Up to 13 km/h in autonomous mode | Not disclosed |
| Sensors | Trimble BX992 dual-GNSS receiver for heading determination with Trimble CenterPoint RTX correction — sub-4cm guidance accuracy maintained under partial tree canopy; cameras and obstacle-detection sensors; onboard AI processing unit; cellular connection to the cloud | Computer-vision weed detection (integrates third-party optical spot-spray sensors such as Weed-It); GPS-guided autonomous navigation with obstacle detection and path planning |
| Price & model | ||
| Price (EUR) | ≈€55,000 upfront, ≈€8,500/yr (indicative conversion — no direct EU pricing published) | Not disclosed |
| Native price | US$65,000 equipment + installation, plus a US$10,000 annual subscription (Farmers Weekly-reported dealer pricing, 2026) | Not disclosed |
| Business model | Buy the retrofit kit outright through Sabanto's dealer network (Trimble Vantage dealers in the US/Canada, e.g. Vanderloop Equipment for Fendt); requires a mandatory annual subscription for guidance/software | Direct sales from SwarmFarm Robotics (Gindie/Emerald, QLD); early commercial units were also offered on a managed lease basis at commercial launch (~AUD 6,000/month reported in 2018 trade press) — current purchase/lease pricing is not published |
| Ongoing cost | US$10,000/year subscription covering guidance service and software updates (Farmers Weekly-reported dealer pricing); individual low-cost sensors can disable the system if damaged ("it only takes one US$20 sensor to put a tractor out of action" — Farmers Weekly) | Not disclosed — no published service/subscription fee schedule; integrating third-party attachments (e.g. Weed-It spot-spray sensors) adds cost |
| Key outcome | ||
| Best verified result | Equipment capital investment (single-farm case study — Quint Pottinger, Kentucky) approximately 70% reduction in equipment capital investment · vendor | Weed density in fallow paddocks under fortnightly SwarmBot spot-spraying -18 percentage points (~90% relative reduction) over 8 weeks · independent |
| EU context | ||
| CE marking | Not disclosed — no CE-marking evidence found; confirmed deployments are US/Canada only | Not applicable — Australian domestic product; no evidence found of CE marking or EU market placement |
| Machinery Regulation | Not applicable — no evidence Steward has been placed on the EU market | Not applicable — not placed on the EU market; would need to meet Regulation (EU) 2023/1230 autonomous-machine provisions if it entered EU sale |
| CAP subsidy | Not applicable — no EU/CAP-linked deployment found | Not applicable — Australian machine, no CAP/EU eco-scheme relevance |
"—" means the manufacturer has not disclosed the figure; we never estimate silently. Model either machine's payback with your own numbers on its ROI calculator page.