# Lightest mobile manipulators

> Of 12 mobile manipulators published on Vuntum, 4 have a sourced, comparable value. The ranking follows weight, from lightest to heaviest. In front: Stretch 4 (46 kg).

- Last verified: 2026-10-14

| Rank | Robot | Maker | Weight | Level of evidence | Source |
|---|---|---|---|---|---|
| 1 | [Stretch 4](https://vuntum.com/en/robots/hello-robot-stretch-4) | Hello Robot | 46 kg | manufacturer statement | Hello Robot (official product pages) |
| 2 | [KNOWIN-X1](https://vuntum.com/en/robots/knowin-x1) | KNOWIN | 50 kg | manufacturer statement | KNOWIN (official product pages) |
| 3 | [Galbot G1](https://vuntum.com/en/robots/galbot-g1) | Galbot | 92.5 kg | manufacturer statement | Galbot (official product pages) |
| 4 | [Galbot S1](https://vuntum.com/en/robots/galbot-s1) | Galbot | 320 kg | manufacturer statement | Galbot (official product pages) |

“Not disclosed” means no information, not “no”. A level of evidence comes with every value.

## Method

- One criterion only: weight, from lightest to heaviest. No score and no average: the order comes from one published value.
- Only general values are used: those that name neither a variant nor a particular measurement condition. For a robot, the most recently verified one. A robot without such a value is not ranked.
- Robots with an equal value share the same rank, then follow in alphabetical order. Every value links to the claim behind it, with its source and date.
- A page only exists if at least 4 robots have a comparable value.

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HTML version: https://vuntum.com/en/rankings/lightest-mobile-manipulators

Factual data: CC BY 4.0. Attribution: “Source: Vuntum (https://vuntum.com)” with a link to the page quoted. Editorial text: all rights reserved, short quotation with attribution.