Buying guide
REV-1 vs Serve Gen 3 in 2026
Comparing 2 humanoid robots across availability, pricing, capabilities, and verified deployments. Current as of 2026.
| Attribute | No image on file | No image on file |
|---|---|---|
| Manufacturer | Refraction AI | Serve Robotics |
| Form factor | sidewalk | sidewalk |
| Maturity | pilot | commercial |
| Availability | internal-onlyenterprise | internal-onlyenterprise |
| Price | Not announced | Not announced |
| Capability claims | — | — |
| Brain | — | — |
| Verified deployments | 1Ann Arbor | 4 |
| Privacy practices | — | 6bystander-recording, cloud-upload, data-retention, third-party-sharing, location-tracking, data-deletion-control |
| Sources on file | 7 | 29 |
Editorial summaries
REV-1
Refraction AI's REV-1 (Refraction AI, founded 2017 in Ann Arbor by University of Michigan professors) is a distinctive three-wheeled delivery vehicle sized between a sidewalk bot and a car: up to 15 mph with about a 280-pound payload, designed for winter and bicycle-courier-style operation, running primarily in the bike lane or road margin while able to use sidewalks where permitted, a regulatory regime between a sidewalk personal delivery device and a road autonomous vehicle. There is no consumer price: it runs a robots-as-a-service model where customers subscribe to dedicated, brand-customizable robots. Several verified-vs-claimed points matter. A reported wind-down or acquisition is refuted: Refraction is verified still operating through 2024 to 2026 (new CEO Luke Schneider, an Austin office, Chick-fil-A as a marquee client, an active 2026 profile); the 'Osage Venture Partners exited' label is a venture-portfolio markdown, not a confirmed acquisition or shutdown, so it is not tagged discontinued. It is recorded at pilot maturity: a roughly 21-person company with a named client and multi-city presence but no independently verified scale figures. Any lifetime delivery count, fleet size, revenue, or live-market count is unverified, and the claim that the REV-1 was discontinued in favor of a 'REF-1' is a likely misread of source language describing a second generation of the same design.
Serve Gen 3
Serve Robotics (NASDAQ: SERV, via a 2023 SPAC merger; spun out of Postmates in 2021, where it began in 2017 as Postmates X) makes the Serve Gen 3, a third-generation autonomous sidewalk delivery robot (rolled out October 16, 2024) and the publicly-traded archetype of the cohort. Gen 3 roughly doubles top speed and range over Gen 2, halves manufacturing cost, and adds 5x onboard compute (NVIDIA Jetson Orin), Ouster digital lidar, and camera, ultrasonic, and GPS fusion. It is operator-supervised Level 4, remotely monitored from Serve's local operations centers with human oversight and takeover, not driverless. Its anchor commercial relationship is Uber Eats. Because Serve is public, its verification depth is unusual in the cohort: SEC quarterly filings. A key cap-flag from those filings: the fleet is about 2,000 robots built but only 812 daily-active (Q1 2026), across 44 cities in 14 US states (verified markets include Los Angeles, Atlanta, Dallas-Fort Worth, Miami, Fort Lauderdale, Chicago, and Alexandria, Virginia). As a B2B delivery service, there is no consumer price.
Machine-readable: this page as markdown.