Spot (robot)
Last reviewed
Apr 26, 2026
Sources
24 citations
Review status
Source-backed
Revision
v2 · 4,136 words
Improve this article
Add missing citations, update stale details, or suggest a clearer explanation.
Suggest edit
CtrlK
Last reviewed
Apr 26, 2026
Sources
24 citations
Review status
Source-backed
Revision
v2 · 4,136 words
Add missing citations, update stale details, or suggest a clearer explanation.
Spot is a quadruped robot developed by Boston Dynamics, an American robotics company now owned by Hyundai Motor Group. First unveiled in prototype form as SpotMini in 2016, Spot became Boston Dynamics' first commercially available robot in 2019 and went on open sale in June 2020 at a base price of $74,500. It is widely recognized as the most commercially successful legged robot in the world, with over 1,500 units deployed across industries including construction, oil and gas, power utilities, mining, manufacturing, and public safety.
Spot is an agile, mobile platform that navigates complex terrain using 12 degrees of freedom across four legs, stereo cameras, and an inertial measurement unit. It supports a modular payload system that allows customers to mount sensors, cameras, and a robotic arm for inspection, data collection, and manipulation tasks. The robot is controlled through a handheld tablet, a Python-based software development kit (SDK), or the Orbit fleet management platform.
Boston Dynamics was founded in 1992 by Marc Raibert, who spun the company out of the Massachusetts Institute of Technology's Leg Laboratory. The company built its reputation through DARPA-funded military robotics projects, most notably BigDog (2005), a gas-powered quadruped designed as a robotic pack mule for soldiers. BigDog demonstrated impressive rough-terrain locomotion but was ultimately shelved because its hydraulic engine was deemed too loud for battlefield use.
Boston Dynamics went through multiple ownership changes during this period. Google acquired the company in December 2013 through its X division. In June 2017, Google sold Boston Dynamics to SoftBank Group. Then in December 2020, Hyundai Motor Group agreed to acquire an 80% stake from SoftBank for approximately $880 million, valuing the company at $1.1 billion. The deal closed in June 2021.
Boston Dynamics first revealed SpotMini on June 23, 2016. Weighing roughly 25 kg (30 kg with its articulated arm attachment), SpotMini was the company's smallest quadruped robot to date and a major departure from its predecessors: it was fully electric rather than hydraulically powered, running on a rechargeable lithium-ion battery with approximately 90 minutes of operation per charge.
In November 2017, Boston Dynamics unveiled a redesigned SpotMini with a smooth yellow shell that replaced the exposed mechanical look of the original prototype. The updated design featured improved sensors and more fluid movement. Throughout 2018, Boston Dynamics released a series of demonstration videos showing SpotMini opening doors, navigating offices, and recovering from pushes, generating significant public attention.
In 2019, Boston Dynamics rebranded the robot simply as "Spot" and announced it as the company's first commercial product. The company launched an Early Adopter Program in the second half of 2019, leasing over 150 Spot robots to domestic and international businesses and research institutions. Early Adopters used Spot to document construction progress, monitor hazardous environments, and provide situational awareness at power generation facilities, decommissioned nuclear sites, factory floors, and research laboratories.
On June 16, 2020, Boston Dynamics opened commercial sales of Spot to any business in the United States at a base price of $74,500. The company expanded global sales over the following months, making Spot available to customers in Europe, Asia, and other regions.
Spot's design prioritizes mobility, durability, and payload flexibility. The following table summarizes the robot's key specifications as listed on the official Boston Dynamics product page.
| Parameter | Specification |
|---|---|
| Mass (with battery) | 33.8 kg (74.5 lb) |
| Length | 1,100 mm (43.3 in) |
| Width | 500 mm (19.7 in) |
| Height (walking) | 610 mm (24.0 in) |
| Height (standing) | 840 mm (33.1 in) |
| Maximum speed | 1.6 m/s (5.76 km/h) |
| Average runtime | 90 minutes |
| Battery capacity | 564 Wh (lithium-ion) |
| Battery recharge time | 60 minutes |
| Ingress protection | IP54 |
| Operating temperature | -20 C to 55 C |
| Maximum payload | 14 kg (30.9 lb) |
| Degrees of freedom | 12 (3 per leg) |
| Maximum slope | 30 degrees |
| Maximum step height | 300 mm (11.8 in) |
| Sensing range | 4 m (360-degree field of view) |
| Payload power supply | 35-58.8 V unregulated DC, 150 W per port |
| Payload mounting | M5 T-slot rails |
| Actuation | All-electric |
Each of Spot's four legs has three actuated joints: two in the hip (providing abduction/adduction and flexion/extension) and one in the knee. This gives the robot a total of 12 degrees of freedom, allowing it to walk, trot, climb stairs, negotiate uneven terrain, and recover from slips. The hip joints provide roughly 45 degrees of range on the X-axis and 91 degrees on the Y-axis, while the knee joint ranges from 14 to 160 degrees.
Spot's perception system consists of five pairs of stereo cameras arranged around the body, providing a 360-degree horizontal field of view with a detection range of approximately 4 meters. These cameras allow the robot to map its surroundings, detect and avoid obstacles, and plan footstep placements in real time. The robot also includes an inertial measurement unit (IMU) and position/force sensors in each limb for balance and proprioceptive feedback.
Spot runs on a swappable 564 Wh lithium-ion battery pack that provides approximately 90 minutes of continuous operation under typical conditions. The battery can be fully recharged in about 60 minutes using the standard charger. The swappable design allows operators to quickly replace a depleted battery in the field, minimizing downtime. For autonomous operations, the Spot Dock self-charging station enables the robot to return and recharge without human intervention.
Spot's modular payload system is central to its commercial value. The robot supports both front and rear payload mounting via M5 T-slot rails, with two power ports each supplying up to 150 W at 35-58.8 V DC. Boston Dynamics sells several first-party payloads, and third-party developers can build custom payloads using the Spot SDK.
The Spot Arm adds a 6-degree-of-freedom robotic arm plus a gripper to the robot, enabling mobile manipulation. The arm weighs 8 kg (17.6 lb) including the gripper and extends to 984 mm (38.7 in) at full reach, with a maximum reach height of 1,800 mm (70.9 in). The gripper can lift loads up to 11 kg, hold a 5 kg load in the air, and pull weights up to 25 kg. The peak clamp force at the gripper tip is 130 N.
The arm includes an in-gripper 4K camera and LED illuminator for close-up inspections. It can perform tasks such as turning valves, flipping levers, opening doors, picking up objects, and manipulating equipment with constrained motion. These actions can be performed manually via the tablet controller, semi-autonomously, or fully autonomously through the API.
The Spot CAM+IR turns Spot into a dedicated inspection platform. It features a 360-degree color ring camera for situational awareness, a pan-tilt-zoom (PTZ) color camera with 30x optical zoom for detailed visual inspections from a distance, and a FLIR radiometric thermal camera for detecting temperature anomalies such as hot spots on electrical equipment. Integrated high-sensitivity microphones and amplified speakers support remote auditory inspections and two-way communication.
Boston Dynamics later released the Spot CAM 2, a second-generation version with a 4K PTZ camera offering 25x optical zoom, an integrated radiometric thermal camera, a 360 x 130-degree spherical camera, and an on-board accessory bay compatible with the Sorama L642 or Fluke SV600 acoustic imager for acoustic inspections. Eight ultra-bright LED lights enable operation in dark environments.
The following table summarizes the primary Spot payload configurations.
| Payload | Function | Key Features |
|---|---|---|
| Spot Arm | Mobile manipulation | 6-DOF arm, gripper, 4K in-gripper camera, 11 kg lift capacity |
| Spot CAM 2 | Visual and thermal inspection | 4K PTZ camera, 25x zoom, thermal camera, 360-degree spherical camera, acoustic bay |
| Spot CAM+IR | Visual and thermal inspection (first gen) | PTZ camera, 30x zoom, FLIR thermal, 360-degree ring camera, microphones |
| Spot CORE I/O | Edge computing and integration | Onboard GPU compute, network interfaces, payload development platform |
| Spot EAP 2 | Enhanced autonomous navigation | Velodyne VLP-16 LiDAR, 360-degree FOV, 100 m detection range, CORE I/O compute |
| Spot GXP | Sensor payload | Additional sensor integration capabilities |
| Persistent Systems MPU5 Radio Kit | Extended communications | Mesh radio for operations beyond Wi-Fi range |
| Fluke SV600 | Acoustic inspection | Acoustic imager for detecting air/gas leaks and electrical discharge |
| Spot Dock | Self-charging station | Automated docking and recharging, Ethernet data offload, 22.9 kg |
Spot's software ecosystem has evolved significantly since the robot's initial release, growing from a basic tablet-controlled system into a full enterprise platform for autonomous robotic operations.
The Spot Software Development Kit (SDK) was released on GitHub in January 2020 as an open-source Python client library. It provides gRPC-based APIs for controlling Spot's movement, accessing sensor data, managing payloads, recording autonomous missions, and integrating custom applications. The SDK supports both real-time teleoperation and fully autonomous behaviors.
Developers use the SDK to build inspection workflows, integrate Spot with existing enterprise systems, and create custom payload applications. The API covers robot state queries, motor commands, image capture, autonomous navigation, manipulation (when the arm is installed), and data logging.
Autowalk is the primary tool for creating autonomous missions. An operator manually drives Spot along a desired route using the tablet controller, and the system records the path as a series of waypoints and edges forming a topological graph. At each waypoint, the operator can program inspection actions such as capturing images, reading gauges, or checking thermal signatures. Once recorded, Spot can replay the mission autonomously, following the same route and executing the same actions without human intervention.
The underlying navigation system is called GraphNav. It uses the recorded map of waypoints and edges for localization and path planning. GraphNav supports dynamic replanning when the robot encounters unexpected obstacles, allowing it to find alternative paths to reach its goal. Maps can be recorded using the tablet controller's Autowalk feature, through the GraphNavRecordingService API, or using command-line tools provided in the SDK. Maps are portable and can be replayed by any Spot robot in a fleet.
Orbit is Boston Dynamics' fleet management and data analysis platform, originally released under the name Scout. It serves as a centralized portal for scheduling autonomous missions, monitoring robot status, reviewing captured data, and managing multiple Spot robots across one or more facilities.
Orbit 5.0, released in mid-2024, introduced several significant features: AI-powered visual inspection that automatically detects anomalies such as debris, spills, or corrosion without manual image review; Site View, which creates a navigable visual history of a facility using 360-degree images captured by Spot; enterprise-scale dashboards aggregating data across all sites; automated face blurring for privacy protection; and over-the-air software updates for Spot robots.
Orbit 5.1 added security patrol as a new mission type, where Spot pauses and captures images when it detects a person during off-hours patrols. It also introduced multi-docking support, allowing customers to place multiple charging docks along Spot's route so the robot can recharge at the nearest dock and extend the range of autonomous missions across large facilities.
Orbit is available as a cloud-hosted service or as a virtual machine that can be deployed on-premises.
Spot Enterprise is an upgraded configuration designed for fully autonomous, long-duration operations. It pairs the standard Spot robot with hardware and software enhancements that support unattended deployment.
The key addition is the Spot Dock self-charging station, which enables Spot to autonomously navigate to the dock, connect for charging, and resume its mission after recharging. The dock also features an Ethernet connection for high-speed data transfer, allowing large inspection datasets to be downloaded from the robot while it charges. The Spot Dock weighs 22.9 kg, accepts 90-277 VAC input, and outputs 58 V at 12 A, fully recharging the robot in 2 to 3.5 hours.
Spot Enterprise also includes upgraded communication hardware for enhanced connectivity and safety features, along with Orbit integration for fleet management and mission scheduling.
In 2024, Boston Dynamics announced the Spot RL Researcher Kit, developed in collaboration with NVIDIA and the Robotics and AI Institute (RAI Institute, formerly the AI Institute). The kit is designed for academic and research institutions studying reinforcement learning locomotion policies on real quadruped hardware.
The kit includes three main components: a joint-level control API that provides direct access to Spot's 12 actuators (bypassing the standard high-level locomotion controller), an NVIDIA Jetson AGX Orin compute payload mounted on Spot, and a simulation environment for Spot built on NVIDIA Isaac Lab. Researchers can train locomotion policies in simulation and then deploy them directly onto the physical robot.
The RAI Institute, the first customer to use the kit, achieved notable results. Their end-to-end reinforcement learning policies enabled Spot to reach locomotion speeds exceeding 5.2 m/s, more than triple the default controller's maximum speed of 1.6 m/s. The trained policies also demonstrated robustness to slippery surfaces and external disturbances. The training code is publicly available through NVIDIA Isaac Lab, and the deployment code is available through Boston Dynamics.
Spot has been deployed across a wide range of industries, with its primary value proposition centered on automating routine inspections, collecting data in hazardous environments, and reducing the need to send human workers into dangerous areas.
Construction firms use Spot to automate progress documentation on job sites. The robot walks predetermined routes through active construction sites, capturing 360-degree images, laser scans, and point clouds that are compared against building information models (BIM) to track progress and identify discrepancies.
Pomerleau, a Quebec-based construction company, used Spot to automate the capture of nearly 5,000 images per week on a 500,000-square-foot building project, saving approximately 20 hours of manual work per week. Hensel Phelps deployed Spot at Denver International Airport's main terminal renovation to automate laser scanning and 360-degree image capture, reducing the need for return visits and minimizing project delays. Foster + Partners also collaborated with Boston Dynamics to use Spot for monitoring construction progress on their projects.
BP deployed Spot on its Mad Dog offshore oil rig, located nearly 200 miles offshore in the Gulf of Mexico. On the platform, Spot performs routine facility inspections including reading analog gauges, listening for noise anomalies in machinery, and capturing thermal images to detect equipment overheating. Aker BP, working with software partner Cognite, similarly sent Spot offshore to monitor operations on its production facilities.
National Grid piloted Spot at a high-voltage electrical substation outside of Boston. The use case involved inspecting a facility the size of a soccer field where no personnel can safely enter during operation. Spot conducted routine inspections autonomously, collecting visual and thermal data on electrical equipment with the goal of avoiding costly unplanned maintenance shutdowns.
J-POWER deployed Spot at the Onikobe Geothermal Power Plant in Japan for routine patrols, using the robot to detect potential equipment failures before they cause downtime.
Steel manufacturer POSCO used Spot together with the Orbit platform for preventive maintenance on its largest blast furnace, leveraging the robot's ability to operate in high-temperature environments where human presence is limited. Mining companies have adopted Spot for underground inspections, ventilation monitoring, and geological surveys in areas that may be unsafe for human workers.
Manufacturing facilities use Spot for equipment monitoring, thermal inspections, and detecting anomalies on production lines. AB InBev deployed Spot in its brewery operations, while BMW Group used the robot at its Plant Hams Hall facility to support digital twin operations, scanning the factory environment to maintain an up-to-date 3D model of the plant.
More than 60 bomb squads and SWAT teams across the United States and Canada use Spot for law enforcement applications, according to data shared by Boston Dynamics in November 2025. The robot is deployed to assess bomb threats, support hostage rescue operations, handle hazardous materials incidents, and provide situational awareness in scenarios where sending a human officer or a police dog would be life-threatening.
The NYPD initially tested Spot in 2021 but suspended the program after public backlash. The department later reinstated the program and purchased two Spot robots for use in assessing bomb threats and hostage situations. Houston operates three Spot robots, Las Vegas has one, and the Massachusetts State Police owns two units purchased in 2020 and 2022, each costing approximately $250,000 with add-ons. Boston Dynamics requires public safety customers to outline exactly how Spot will be used before shipping a unit, and the company prohibits weaponizing the robot.
SpaceX purchased Spot robots for use at its Boca Chica, Texas, Starship test facility. The robots, named Zeus and Apollo, are deployed to inspect launch infrastructure after rocket tests, survey areas with potential gas leaks, and collect data from sites deemed too hazardous for human workers. During cryogenic pressure tests on Starship prototypes, Spot was used to approach and inspect the test area after controlled tank ruptures involving sub-cooled liquid nitrogen.
NASA JPL explored Spot's potential as part of the NeBula (Networked Belief-aware Perceptual Autonomy) project, investigating how quadruped robots could navigate subterranean environments relevant to planetary exploration. NASA Ames also worked with Spot through the Braille project for similar research purposes.
| Customer | Industry | Use Case |
|---|---|---|
| BP | Oil and gas | Offshore platform inspection at Mad Dog rig |
| National Grid | Power utilities | High-voltage substation inspection |
| SpaceX | Aerospace | Launch site inspection at Boca Chica |
| NASA JPL | Space exploration | Subterranean navigation research (NeBula) |
| Pomerleau | Construction | Automated site documentation |
| Hensel Phelps | Construction | Airport terminal renovation scanning |
| POSCO | Steel manufacturing | Blast furnace preventive maintenance |
| J-POWER | Power generation | Geothermal plant patrol inspections |
| AB InBev | Food and beverage | Brewery facility monitoring |
| BMW Group | Automotive manufacturing | Digital twin scanning at Plant Hams Hall |
| Aker BP | Oil and gas | Offshore production monitoring |
| NYPD | Law enforcement | Bomb threat and hostage situation assessment |
| Massachusetts State Police | Law enforcement | Hazardous materials and tactical operations |
The quadruped robot market has expanded significantly since Spot's commercial debut, with several competitors offering alternatives at various price points and capability levels.
Unitree Robotics, a Chinese robotics company, is Spot's most prominent competitor by volume. Unitree's Go2 quadruped starts at approximately $1,600, making it dramatically more affordable than Spot. The Go2 EDU variant, aimed at educational and research users, is priced around $16,000. Unitree held an estimated 70% share of global quadruped robot sales by volume in 2023, driven largely by its aggressive pricing.
However, the Go2 and Spot target different market segments. The Go2 is popular among researchers, hobbyists, and educational institutions due to its low cost and open-source SDK, but it lacks the industrial-grade durability, IP54 environmental protection, enterprise software ecosystem, and payload system that Spot offers. Spot's proven track record in harsh industrial environments, along with its Orbit fleet management platform and certified inspection payloads, makes it the preferred choice for commercial and industrial deployments.
Unitree's B2 model, positioned as a more direct industrial competitor to Spot, offers higher speed and payload capacity at a lower price point, though it has a smaller installed base and less mature software ecosystem.
ANYbotics, a Swiss robotics company spun out of ETH Zurich, produces the ANYmal quadruped robot, which competes with Spot in the industrial inspection segment. ANYmal weighs approximately 30 kg with payload, carries up to 10 kg of sensor payload, and features IP67 ingress protection (superior to Spot's IP54). Its onboard battery provides 2 to 4 hours of continuous operation, roughly double Spot's 90-minute runtime.
ANYmal X is certified for use in explosive atmospheres (ATEX/IECEx zones), making it suitable for oil, gas, and chemical plants where such certification is required. ANYmal is priced higher than Spot, though exact pricing is not publicly disclosed, and has a smaller commercial deployment base.
| Robot | Manufacturer | Weight | Max Speed | Runtime | Payload | IP Rating | Approximate Price |
|---|---|---|---|---|---|---|---|
| Spot | Boston Dynamics | 33.8 kg | 1.6 m/s | 90 min | 14 kg | IP54 | $74,500 (base) |
| Go2 | Unitree | ~15 kg | 2.5 m/s | ~60-120 min | ~3 kg | IP54 (Pro) | From $1,600 |
| B2 | Unitree | ~60 kg | 6.0 m/s | ~4 hours | 40 kg | IP67 | ~$16,000-60,000 |
| ANYmal D | ANYbotics | ~30 kg (with payload) | 1.0 m/s | 2-4 hours | 10 kg | IP67 | Not publicly disclosed |
As of 2025, Boston Dynamics states that over 1,500 Spot robots are in customer hands worldwide, making it the most widely deployed commercial quadruped robot by a Western manufacturer. Customers have automated more than one million data captures using Spot and the Orbit platform.
Spot's commercial success has helped establish the viability of legged robots as practical industrial tools rather than laboratory curiosities. The robot has been adopted across six primary verticals: power utilities, construction, oil and gas, mining, manufacturing, and public safety. Boston Dynamics continues to expand Spot's capabilities through regular software updates, new payloads, and partnerships with enterprise software providers like IFS, which announced an integration in November 2025 combining Spot's autonomous inspections with IFS.ai for agentic AI-driven field operations.
Spot's growing deployment in law enforcement has attracted scrutiny from civil liberties organizations. Critics argue that deploying semi-autonomous robots in policing scenarios could normalize a more militarized approach to law enforcement. The NYPD's initial 2021 deployment and subsequent public backlash highlighted tensions between the operational benefits of robotic situational awareness and community concerns about surveillance and intimidation.
Boston Dynamics has taken a public position against weaponization. The company requires public safety customers to describe their intended use case before a purchase is approved and explicitly prohibits attaching weapons to the robot. In 2022, Boston Dynamics joined with five other robotics companies in an open letter pledging not to weaponize their general-purpose robots and urging others to do the same.