Wearable Index
Sandbar · Ring

Stream Ring

Preorder

The Sandbar Stream Ring is a $249 smart ring, on preorder for 2025. Voice-first AI ring — capture thoughts by speaking, or whispering, into your hand; the first five batches have sold out and the current sixth preorder batch is scheduled to ship in January 2027.

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Sandbar Stream Ring — ring worn on the finger
Image sourceSandbar

Generations

GenerationYearStatusPriceWeight
Stream Ring 2025 Preorder $249 Not disclosed

Specifications by generation

Stream Ring

2025Preorder

Voice-first AI ring — capture thoughts by speaking, or whispering, into your hand; the first five batches have sold out and the current sixth preorder batch is scheduled to ship in January 2027.

Category
Ring
Worn
Finger
Release
2025
Price
$249
Weight
Not disclosed
Sensors & hardware
  • Audio Microphone (array)
  • Input Touch / tap inputHaptics

Developer access

  • Stream MCP public stable
    • Search/export captured context
    • Retrieve recent interactions
    • Send context to Stream
    • MCP clients

    Requires a Stream account, authentication and the server URL provided in the Stream app.

  • Hardware developer alpha restricted/private preview

    Small selected cohort; interest form is not general SDK availability.

Documentation
public

Not yet verified: app distribution, vendor-server requirements and hardware and software openness.

Openness, servers & distribution
hardware

Schematics, mechanical designs and firmware publication were not verified.

firmware

Source availability and licensing were not established in this review.

companion apps

Source availability and licensing were not established in this review.

SDK

Source availability and licensing were not established in this review.

backend services

Source availability and licensing were not established in this review.

Vendor servers

Vendor-server requirements were not established for this device.

App distribution

Third-party app distribution was not verified.

A companion app or integration is not evidence of a third-party app store.

Company & funding

Sandbar

Disclosed outside financing; partial history

Disclosed funding
USD 36Mcompany-published total · as of 2026-03-10

Company-announced cumulative venture financing. Includes prior financing; do not add the Series A amount again.

Disclosed rounds
1known minimum

Among makers in the index

Disclosed funding of the 32 makers in the index that publish a total, on a log scale in USD. Other currencies are placed at approximate rates; totals differ in date and coverage. Sandbar sits above 20 of the other 31.

Rounds

  1. 2026-03-10announced

    Series AUSD 23M

    Led by Adjacent and Kindred Ventures

    Equity / venture financing

    Announced amount; closing date not disclosed.

    No reliable amount was established in this review.

Company

Legal entity and parent/brand relationships were not established in this review.

Investors on record

InvestorRoleRound
AdjacentLead investorSeries A · 2026-03-10
Kindred VenturesLead investorSeries A · 2026-03-10

Not yet verified: valuation.

Compare

sandbar.com All 124 devices

Independent index — figures are approximate and editorial, not official spec sheets. Methodology. Last reviewed 2026-10-31.