robotindex Flexiv Rizon
A 7-axis, force-controlled adaptive robot arm from Flexiv. The Rizon 4 carries 4 kg, repeats to about ±0.05 mm, weighs about 20 kg, is rated IP65, and senses force and torque in every joint so it can feel contact along the whole arm. It was introduced in 2019, the line also includes the Rizon 4s and the larger Rizon 10, and Flexiv sells it by quote with no published price.
Manufacturer page — flexiv.com →
Image: Flexiv (Rizon)
Specs
Price
On requestNo published price
Axes
7Redundant arm
Payload
4 kgRizon 4 / 4s
Reach
780–876 mmSources differ
Repeatability
±0.05 mmRizon 4; 4s quoted 0.1 mm
Weight
~20 kgRizon 4
Protection
IP65Dust-tight, water jets
Sensing
Joint F/TEvery axis, plus end-effector
Safety
CE + ETL18 functions, ISO 13849 PLd
Mounting
Any angleOr on AMR / AGV
Introduced
2019Rizon 10 launched 2021
Maker
FlexivFounded June 2016
Reference Price
Flexiv does not publish a price for the Rizon. It is sold by quotation through Flexiv and its resellers, and no list price turned up in any source checked. Which model you need depends on payload: Rizon 4 and Rizon 4s carry 4 kg, and the Rizon 10 is the larger-payload model. Grippers, end effectors and software packages are configured separately. robotindex does not sell this product.
Insights
Flexiv was founded in June 2016 with roots at Stanford, and the first Rizon prototype was built in October 2017. Rizon was soft-launched at Hannover Messe in 2019, mass production began in the second half of 2020, the Rizon 4 won iF Design and German Innovation awards in 2020, the Rizon 10 launched in 2021, and Rizon 4 received CE and ETL certification the same year. Flexiv reports that Rizon 4 was the first robot arm to pass the ISO/TS 15066 collision test at the elbow and wrist. The arm's selling point is force control: every joint senses torque, so it can polish, assemble and handle delicate parts by touch, and it has been used for tasks such as robotic massage. At IROS 2026 Flexiv showed a Rizon 4 leader-follower teleoperation pair alongside its newer Enlight arm and the MICO dual-arm system, so Rizon is no longer the newest platform. It is a commercial, closed product, so this page has no Open Source badge.
Verified against Automate.org's Rizon 4 listing, RoboDK's Rizon 4 entry, Qviro's Rizon 4s data, Robotic Gizmos, Flexiv's company history page, Wikipedia's Flexiv article and Robotics and Automation News coverage of IROS 2026, as of October 2026. Flagged as uncertain: reach is 780 mm at RoboDK and Qviro, 850 mm at Robotic Gizmos and 876 mm at Automate.org, and none was checked against a Flexiv datasheet; repeatability is ±0.05 mm for the Rizon 4 and 0.1 mm for the Rizon 4s; weight comes from RoboDK and Qviro only; the ISO/TS 15066 claim and the 18 safety functions come from a Robotic Gizmos article that cites Flexiv; no price is published; Wikipedia gives Flexiv's headquarters as Shanghai while Flexiv's own history page cites Silicon Valley for the first prototype; and the photo is a small manufacturer image, enlarged.