Pepper (Robot)
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Last reviewed
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Pepper is a semi-humanoid robot designed for social interaction, originally manufactured by the French company Aldebaran (later SoftBank Robotics Europe, then Aldebaran again after 2022). Standing approximately 120 centimeters tall, Pepper was unveiled in Tokyo on June 5, 2014 by Masayoshi Son, the founder and chief executive of the SoftBank Group, and marketed as the world's first personal robot capable of recognizing principal human emotions. Pepper was designed primarily for face-to-face interaction in retail, hospitality, education, healthcare, and home environments, and became one of the most widely deployed social robots in commercial settings during the 2010s. It is closely associated with consumer awareness of humanoid robotics in Japan, where it served as a recognizable mascot of SoftBank Mobile stores, banks, hotels, and railway stations.[1][2][3]
Development of Pepper began at Aldebaran in France around 2012, shortly after SoftBank acquired the company for approximately one hundred million United States dollars. The first commercial units shipped to consumers in June 2015, and the initial production batch of one thousand units sold out in approximately sixty seconds in Japan. Production was ultimately suspended in June 2021 after roughly twenty-seven thousand units had been built by Foxconn in China, with SoftBank citing weak global demand and limited renewals of the three-year subscription contracts that businesses signed for the robot. After Aldebaran's reacquisition by the German United Robotics Group in 2022, the company continued to support Pepper for existing customers but did not resume mass production. Aldebaran was placed in receivership in early 2025.[4][5][6]
| Property | Value |
|---|---|
| Manufacturer | Aldebaran (2014 to 2016, 2022 onward), SoftBank Robotics (2016 to 2022) |
| Country of origin | France (design), China (manufacturing by Foxconn) |
| Year introduced | June 5, 2014 |
| First commercial sale | June 2015 (Japan) |
| Production paused | June 2021 |
| Height | Approximately 120 centimeters (1.2 meters) |
| Weight | Approximately 28 kilograms |
| Degrees of freedom | 17 to 20 (varies by source and software version) |
| Battery life | About 12 hours of standby, 8 to 10 hours of active use |
| Mobility | Three omnidirectional wheels on a triangular base |
| Operating system | NAOqi OS (modified Gentoo Linux), later Android (NAOqi 2.9) |
| Sensors | Two HD cameras, one 3D depth camera, four microphones, two sonars, six lasers, three bumper sensors, multiple touch and gyroscope sensors |
| Display | 10.1 inch chest-mounted touchscreen tablet |
| Languages supported | Approximately 15 to 20, including Japanese, English, French, Spanish, German, Italian, Arabic, and Chinese |
| Initial unit price | Approximately 198,000 Japanese yen (around 1,800 United States dollars) plus monthly service contracts |
Aldebaran Robotics was founded in Paris, France in 2005 by Bruno Maisonnier, with the goal of building affordable autonomous humanoid robots for both consumers and researchers. The company first achieved international recognition with the NAO robot, a 58 centimeter biped released in 2008 that became a standard platform in academic research, with several thousand units sold to universities and laboratories worldwide. NAO established the underlying NAOqi software framework and the box-based Choregraphe visual programming environment that Pepper would later inherit.[7]
In 2012, the SoftBank Group, a Japanese telecommunications and investment conglomerate led by Masayoshi Son, acquired Aldebaran for approximately one hundred million United States dollars. SoftBank's stated motivation was to enter the consumer service robotics market, with Son repeatedly framing humanoid robots as the next major computing platform after the personal computer and smartphone. Following the acquisition, Aldebaran began developing a new robot under the project name Project Romeo and the parallel SoftBank initiative codenamed Project Pepper, with the latter eventually becoming the consumer-facing product. Engineering work was led from the Issy-les-Moulineaux office in France with significant input from SoftBank in Tokyo, and physical assembly was contracted to Foxconn in mainland China.[1][2][8]
Pepper was publicly introduced on June 5, 2014 at a press conference in Tokyo. Masayoshi Son personally presented the robot, declaring on stage that the goal was to develop affectionate robots that could make people smile. The unveiling event included a live demonstration in which Pepper interacted with Son, showed gestures, and reacted to spoken cues. Press coverage at the time emphasized Pepper's role as the first mass-market personal robot designed primarily to recognize and respond to human emotional states, although technical observers were already cautious about the depth of such recognition.[2][9]
The robot first appeared in SoftBank Mobile retail stores in Japan beginning the day after its announcement, where it acted as a greeter, demonstrator, and conversational entertainer for visiting customers. Commercial sales to consumers began in June 2015, with an initial sticker price of approximately 198,000 Japanese yen for the hardware, plus a mandatory monthly subscription for software and cloud services. The first batch of one thousand units sold out in approximately sixty seconds, an event widely cited as evidence of strong consumer interest in personal robotics in Japan.[3][10]
Following the launch in Japan, SoftBank Robotics expanded distribution to other markets, with a Pepper for Biz business edition introduced for enterprise customers. The robot reached Europe through partnerships with retailers and through SoftBank Robotics Europe in Paris, and entered the United States in 2016 through SoftBank Robotics America. By 2018, Pepper had been adopted by hundreds of organizations across more than seventy countries, including hotels, banks, museums, hospitals, and educational institutions. SoftBank Robotics also operated training and certification programs for partners and integrators who built domain-specific applications for Pepper using the Pepper SDK.[11][12]
Despite the high-profile launch, Pepper struggled to demonstrate sustainable commercial value over the second half of the 2010s. Reuters and Bloomberg reported in June 2021 that SoftBank had quietly stopped manufacturing Pepper in 2020, with formal confirmation following soon after. Reports cited weak demand, particularly in enterprise contexts where only about fifteen percent of three-year service contracts were being renewed, alongside the high ongoing cost of supporting the deployed fleet. By the time of the production pause, approximately twenty-seven thousand units had been built in total. SoftBank also reduced staff at SoftBank Robotics Europe by close to half, although the firm continued to support existing Pepper deployments and to develop other robots, including the cleaning robot Whiz.[4][5][13]
In 2022, SoftBank sold its European robotics subsidiary to the United Robotics Group, a Bochum, Germany-based group founded in 2019 by entrepreneur Thomas Hahn that had served as the primary European distributor of Pepper and NAO since 2021. As part of the transition, the unit reverted to its original name, Aldebaran, dropping the SoftBank Robotics Europe branding. The new owners attempted to revive the product line by repositioning Pepper for hospitality and catering and by introducing the new Plato service robot, but financial pressures continued. United Robotics Group reportedly stopped funding Aldebaran in 2024, and Aldebaran was placed in receivership in early 2025, with industry observers noting the difficulty of building a sustainable consumer humanoid business at the price points and capability levels Pepper had targeted.[6][14][15]
Pepper was engineered as a compact, mobile, expressive humanoid optimized for upright social interaction with adults and children. Its body uses a humanoid upper torso mounted on a wheeled base rather than legs, a deliberate trade-off that prioritized stability, safety in crowded public spaces, and battery life over the ability to traverse stairs or rough terrain.[7][16]
| Subsystem | Specification |
|---|---|
| Height | Approximately 120 centimeters (1.20 meters) |
| Weight | Approximately 28 kilograms |
| Total degrees of freedom | 17 to 20 depending on configuration and software version |
| Head | 2 degrees of freedom (yaw and pitch) |
| Arms | 5 degrees of freedom each, plus articulated multi-finger hands |
| Hip and torso | 2 degrees of freedom |
| Mobile base | 3 omnidirectional Mecanum-style wheels arranged in a triangle |
| Maximum speed | Approximately 3 kilometers per hour |
| Maximum slope | Roughly 1.5 degrees, designed for flat indoor floors only |
The wheeled base allows Pepper to glide smoothly across an indoor space and rotate in place, gestures that designers used to convey character and presence without the safety risks of bipedal walking. The robot cannot climb stairs, step over thresholds, or traverse uneven outdoor surfaces.[16][17]
| Sensor type | Location and detail |
|---|---|
| 2D HD cameras | Two cameras located in the forehead and the mouth area, used for face detection, color recognition, and barcode reading |
| 3D depth sensor | One Asus Xtion-derived 3D camera behind the eyes, used for depth perception and obstacle avoidance |
| Microphones | Four-microphone array on the head, used for speech recognition and sound source localization |
| Touch sensors | Capacitive sensors on the head and hands, used to detect petting and handshakes |
| Sonars | Two ultrasonic sensors on the base for short-range obstacle detection |
| Lasers | Six laser line generators on the base for low-resolution distance sensing |
| Bumpers | Three contact bumpers on the front of the base |
| Inertial measurement | Gyroscope in the torso for orientation tracking |
The combination of cameras, depth sensing, microphone array, and contact sensors allowed Pepper to perform face detection and tracking, basic emotion estimation from facial expressions and tone of voice, sound localization, and short-range obstacle avoidance during navigation. The 3D camera placement gave the robot a usable depth range of roughly 0.4 to 8 meters under typical indoor lighting.[7][16][18]
Pepper's main controller is an Intel Atom-based embedded computer running the NAOqi OS, a customized Linux distribution based on Gentoo. A secondary Android-based tablet runs the chest-mounted 10.1 inch touchscreen, which serves as a visual interface for menus, web content, surveys, and supporting graphics during conversations. Wireless connectivity includes Wi-Fi and Ethernet for cloud services, software updates, and integration with enterprise systems.[19][20]
Pepper draws energy from a 30 ampere-hour, approximately 795 watt-hour lithium-ion battery housed in the lower torso. Under typical use, this provides about 12 hours of standby time and 8 to 10 hours of active interaction time, depending on the intensity of motion and computation. The robot returns to a charging station via cable; it does not use wireless charging in standard configurations.[16][21]
Pepper's software inherits and extends the framework originally developed for the NAO robot, which means that experience and code from the existing NAO research community could be carried over to Pepper with relatively modest adaptation.[19][22]
NAOqi OS is the embedded operating system that runs on Pepper's main controller. It is built on top of OpenNAO, a customized Gentoo Linux distribution, and provides a middleware layer called NAOqi that exposes the robot's sensors, motors, speech engines, and behavior management as a set of modular services. Modules can be invoked locally or over the network, and applications can subscribe to events such as face detection, sound detection, and touch.[20][23]
Choregraphe is the official integrated development environment for Pepper and NAO. It provides a visual, box-based programming interface in which developers connect predefined behavior boxes (for example, speech, animation, vision, and dialogue) on a flowchart canvas. Each box can be opened to reveal an underlying Python script that can be edited or replaced. Choregraphe also includes a 3D simulator, allowing developers to test behaviors without a physical robot. The combination of visual programming and Python extensibility made Choregraphe accessible to non-programmers while still supporting more sophisticated development by experienced engineers.[19][22]
The Pepper SDK provides language bindings that allow developers to control the robot programmatically. Supported environments include Python, C++, Java, JavaScript, and the Robot Operating System (ROS) for research integration. Beginning with NAOqi 2.9, Pepper transitioned to an Android-based application model, with developers writing Android Studio applications in Java or Kotlin against the QiSDK API and deploying them to the chest tablet, which then communicates with the underlying robot services. This shift reflected an attempt to leverage the much larger Android developer community.[20][23][24]
Out of the box, Pepper supports speech recognition and text-to-speech in approximately fifteen to twenty languages, including Japanese, English, French, Spanish, German, Italian, Arabic, and several Asian languages. Speech recognition uses a combination of on-device processing and, in some configurations, cloud services. Pepper also includes face detection and tracking, basic facial expression analysis, sound source localization, and dialogue management features that allow developers to script branching conversations.[7][22][25]
Pepper was sold both to consumers and to businesses, although enterprise applications dominated the installed base. Common deployment scenarios fell into several categories.[11][26]
Pepper was widely used as a greeter, recommender, and information assistant in retail environments. The French supermarket chain Carrefour deployed Pepper in selected stores in France and Italy, where it provided wine recommendations, recipe suggestions in the deli aisle, and help finding products in the books and magazines section. In the United States, Costco trialed Pepper for product demonstrations in select warehouse club locations, and the robot also appeared at the entrance of HSBC flagship branches in New York City to greet customers, answer common questions, and direct visitors to appropriate counters.[26][27][28]
In the hospitality industry, Pepper was used as a concierge, check-in assistant, and entertainer. The Henn-na Hotel in Nagasaki, Japan, often described as the world's first robot-staffed hotel, used Pepper alongside other robots to assist guests at reception and information desks. The Mandarin Oriental Las Vegas and select Marriott properties trialed Pepper in their lobbies, with one Courtyard by Marriott property reporting an eleven-point increase in customer satisfaction scores after introducing the robot. Costa Cruises also deployed Pepper on cruise ships to provide passengers with information about onboard activities.[29][30]
Pepper was deployed in branches of multiple banks, including Mizuho Bank in Japan, several banks in Taiwan, and HSBC in the United States. In banking environments, the robot acted as a digital concierge, greeting customers as they entered, answering questions about products, helping fill out simple forms, and reducing perceived wait times by entertaining visitors during peak hours.[26][31]
Pepper became a widely used research and teaching platform in universities and laboratories. Although the older NAO robot remained more common in fundamental research because of its smaller size, lower price, and longer commercial life, Pepper was particularly used in studies of human-robot interaction in public spaces, in classroom assistant scenarios, and in studies of children with autism spectrum conditions. Several major universities, including Brown University, the University of Tokyo, and Heriot-Watt University, used Pepper in research on dialogue systems, multimodal interaction, and embodied conversational agents.[32][33][34]
In healthcare settings, Pepper was deployed in hospitals as a wayfinding and information assistant, in pediatric wards as an entertainer, and in elder care facilities as a companion and exercise leader. Studies in Belgium, Japan, and the United Kingdom evaluated Pepper as a coach for cognitive and physical exercises with elderly residents, with mixed but generally positive findings on engagement, even where the underlying capabilities of the robot were limited.[35]
Pepper served as a public-facing assistant in railway stations, museums, and government offices, particularly in Japan. JR East, the major Japanese railway operator, deployed Pepper in some stations to provide route information to travelers, and museums used Pepper to deliver short interactive exhibit introductions in multiple languages.[3][26]
| Year | Event |
|---|---|
| 2005 | Aldebaran Robotics founded in Paris by Bruno Maisonnier |
| 2008 | NAO humanoid robot released by Aldebaran |
| 2012 | SoftBank Group acquires Aldebaran for approximately 100 million United States dollars |
| 2014 | Pepper unveiled by Masayoshi Son in Tokyo on June 5 |
| 2015 | First consumer sales in Japan; initial batch of 1,000 units sold out in 60 seconds |
| 2016 | Aldebaran rebranded as SoftBank Robotics; Pepper expanded to Europe and the United States |
| 2017 to 2018 | Adoption by retailers, banks, hotels, and museums in over 70 countries |
| 2018 | Pepper for Biz subscription model offered to enterprise customers |
| 2019 | Major automaker SoftBank Robotics presence at international trade shows; renewals start to drop |
| 2020 | Manufacturing of Pepper effectively halted, although SoftBank does not announce it publicly |
| 2021 | Reuters reports the production pause in June; SoftBank Robotics Europe lays off about half its staff |
| 2022 | SoftBank sells European subsidiary to United Robotics Group; unit reverts to the Aldebaran name |
| 2023 | Aldebaran continues to support deployed Pepper fleet but does not resume mass production |
| 2024 | United Robotics Group reportedly stops funding Aldebaran |
| 2025 | Aldebaran placed in receivership |
Pepper occupied a particular niche in the wider social robot market, between very small and inexpensive companion robots and much more expensive research humanoids. The table below compares Pepper with several notable peers.[7][32]
| Robot | Manufacturer | First introduced | Approximate height | Mobility | Primary use |
|---|---|---|---|---|---|
| Pepper | Aldebaran / SoftBank Robotics | 2014 | 120 centimeters | Wheeled base | Public-facing social interaction |
| NAO | Aldebaran / SoftBank Robotics | 2008 | 58 centimeters | Bipedal walking | Research, education |
| Jibo | Jibo Inc. (United States) | 2017 | 28 centimeters | Tabletop, swiveling head | Home companion |
| Buddy | Blue Frog Robotics (France) | 2018 | 56 centimeters | Wheeled base | Home companion |
| Romeo | Aldebaran / SoftBank Robotics (concept) | 2009 | 140 centimeters | Bipedal walking | Elder care research |
| Sophia | Hanson Robotics | 2016 | 167 centimeters | Mostly stationary | Public demonstration |
| Sanbot | QIHAN Technology (China) | 2016 | 92 centimeters | Wheeled base | Retail and education |
| Cruzr | UBTECH Robotics (China) | 2016 | 130 centimeters | Wheeled base | Public-facing service |
Pepper was unusual in its combination of a relatively large, expressive humanoid upper body, an integrated chest tablet, and a stable wheeled base, and was for several years the most widely deployed and recognized humanoid in commercial public spaces.[7][13]
Pepper attracted both admiration and skepticism from launch onward. Press coverage and consumer demonstrations frequently highlighted the robot's friendly appearance, expressive gestures, and large, blinking eyes, and Pepper became a recurring subject in television features, viral video clips, and museum exhibits about robotics.[2][9][10]
The most contentious aspect of Pepper's positioning was the claim, made repeatedly in marketing material and media interviews, that the robot could read or recognize human emotions. Technically, Pepper estimated emotional state by combining facial expression analysis with prosodic features extracted from speech, mapping these to a small set of emotion categories. Critics in the academic and trade press argued that this fell well short of any meaningful emotional understanding and described the framing as overhyped. A widely cited essay in The Conversation argued that mismatched expectations between the marketing and the robot's actual responses risked making real-world interactions disappointing or frustrating, an effect sometimes referred to as the uncanny mismatch.[36][37]
Many commercial users reported that Pepper struggled with practical tasks. Speech recognition performance was sensitive to background noise, accents, and pronunciation variation, and the robot's vocabulary and dialogue management were generally limited to scripted scenarios. The wheeled base could navigate flat indoor floors but not stairs or uneven outdoor environments, and the relatively short articulated arms restricted physical manipulation. Several deployments found that novelty effects were strong, with engagement spiking in the first weeks and then declining as users discovered the limits of the robot's interactive repertoire.[36][38][39]
The limited functional capabilities translated into mixed commercial outcomes. By 2019, only about fifteen percent of three-year enterprise contracts were being renewed in some markets, and many high-profile deployments quietly removed Pepper from the floor as the novelty faded. The Wall Street Journal reported in 2021 that customers including major retailers and hotels had decommissioned units after finding them inadequate for sustained service tasks. SoftBank's eventual decision to halt production was widely interpreted as confirmation that Pepper had not found a sustainable mass-market use case.[5][13][39]
Despite the criticism of its consumer-facing claims, Pepper was widely valued in the human-robot interaction research community as a standardized, mass-produced platform that allowed comparable studies across institutions. The combination of a stable wheeled base, expressive humanoid upper body, sensors, and an open SDK made Pepper a useful experimental subject for research on multimodal interaction, dialogue, joint attention, and embodiment effects, even when the same features were considered insufficient for commercial deployment.[33][40]
In Japan, Pepper became one of the most recognizable consumer-facing robots of the 2010s and a symbol of the country's broader interest in service robotics as a response to demographic challenges. Pepper was a familiar presence in SoftBank Mobile stores, banks, hotel lobbies, and railway stations, and frequently appeared in television commercials and promotional events. The robot was used in shrine ceremonies, weddings, and birthday parties, and a Buddhist priest in Kyoto famously employed Pepper to recite sutras as part of a low-cost funeral service. These uses brought robotics into everyday Japanese cultural life in ways that few other commercial robots achieved.[3][41]
Internationally, Pepper became one of the most photographed and televised humanoid robots of its era. It made appearances at the World Economic Forum in Davos, gave a presentation to a committee of the United Kingdom Parliament in 2018 on the implications of artificial intelligence and the fourth industrial revolution, and was included in numerous museum exhibits about the future of work. Although technical observers were often critical of the gap between perception and capability, Pepper played a meaningful role in shaping public expectations and imagination around social humanoid robots.[42]
Pepper's commercial difficulties and eventual production pause have been widely discussed as case studies in the challenges of building sustainable consumer humanoid businesses. Common lessons drawn from the Pepper experience include the difficulty of meeting consumer expectations set by science fiction and marketing, the importance of robust speech recognition and dialogue systems for any conversational robot, and the need to design for ongoing service and content updates rather than treating a humanoid as a one-time hardware sale. The same lessons informed subsequent generations of social robots from companies including UBTECH, Furhat Robotics, and Engineered Arts, and contributed to the strategic shift across the industry toward task-specific service robots, such as cleaning robots, food-service robots, and delivery robots, in place of general-purpose humanoid companions.[13][39][43]
In the robotics community, Pepper remains a meaningful platform in deployed research projects, and the body of NAOqi-based research and educational material accumulated during its peak years continues to influence designs of subsequent social robots. The reuse of NAO and Pepper code bases by Aldebaran and the United Robotics Group, and the continued availability of Choregraphe and the Pepper SDK to existing customers, mean that the technical ecosystem persists even as new hardware production has ceased.[6][14][22]