Siren (San Francisco) Overview

  • Founded
  • 2015

  • Status
  • Private

  • Employees
  • 22

  • Latest Deal Type
  • Lev. Recap.

  • Latest Deal Amount
  • $2.3M

  • Investors
  • 26

Siren (San Francisco) General Information


Developer of a smart sock designed to continuously measure foot temperature, an early indicator of injury that may lead to ulcers. The company's smart socks continuously track foot temperature and send information to the doctor to help them track issues related to inflammation, enabling podiatrists to detect early signs of inflammation in patients at risk of developing diabetic foot ulcers.

Contact Information

Ownership Status
Privately Held (backing)
Financing Status
Venture Capital-Backed
Primary Industry
Other Devices and Supplies
Other Industries
Monitoring Equipment
Other Healthcare Technology Systems
Primary Office
  • 1256 Folsom Street
  • San Francisco, CA 94103
  • United States
+1 (888) 000-0000

Siren (San Francisco) Timeline

Financing RoundCaptured Employee CountEstimated Employee Growth

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Siren (San Francisco) Valuation & Funding

Deal Type Date Amount Raised to Date Post-Val Status Stage
13. Leveraged Recapitalization 10-May-2023 $2.3M 000.00 Completed Generating Revenue
12. Secondary Transaction - Private 22-Nov-2022 000.00 Completed Generating Revenue
11. Later Stage VC (Series B) 30-Sep-2020 000.00 000.00 Completed Generating Revenue
10. Debt - General 30-Jun-2020 00.000 000.00 Completed Generating Revenue
9. Early Stage VC 28-Mar-2018 00.00 000.00 Completed Generating Revenue
8. Early Stage VC (Series A) 01-Jan-2018 00.00 00.000 Completed Generating Revenue
7. Seed Round 02-May-2017 00000 Completed Generating Revenue
6. Grant 08-Jan-2017 0000 00000 Completed Generating Revenue
5. Accelerator/Incubator 01-Aug-2016 $125K $625K 00.00 Completed Generating Revenue
4. Seed Round 01-Jan-2016 $500K $500K Completed Generating Revenue
To view Siren (San Francisco)’s complete valuation and funding history, request access »

Siren (San Francisco) Patents

Siren (San Francisco) Recent Patent Activity

Publication ID Patent Title Status First Filing Date Technology (CPC) Citations
US-D950400-S1 Sensing garment Active 14-Dec-2018 0000000000 000
US-20220175317-A1 Sensing garment and method for making same Pending 14-Dec-2018 0000000000 00
US-11109807-B2 Sensing garment and method for making same Active 14-Dec-2018 0000000000
US-20200222001-A1 Sensing garment and method for making same Active 14-Dec-2018 0000000000 00
US-20210298674-A1 Method for registration and activation of temperature-sensing garments Pending 14-Dec-2018 A61B5/6807
To view Siren (San Francisco)’s complete patent history, request access »

Siren (San Francisco) Executive Team (12)

Name Title Board Seat Contact Info
Ran Ma Co-Founder & Chief Executive Officer
Henk-Jan Scholten Co-Founder & Chief Operating Officer
Jie Fu Co-Founder & Chief Technology Officer
Alexander Reyzelman Podiatric Surgeon & Co-Director Limb Preservation Unit UCSF
John Gilmore Executive Vice President, Operations
You’re viewing 5 of 12 executive team members. Get the full list »

Siren (San Francisco) Board Members (1)

Name Representing Role Since
Jason Krikorian JD DCM Ventures Board Member 000 0000
To view Siren (San Francisco)’s complete board members history, request access »

Siren (San Francisco) Signals

Growth Rate

0.80% Weekly
Weekly Growth 0.80%, 93rd %
-35.5%. 530%

Size Multiple

219x Median
Size Multiple 219x, 100th %ile
0.00x 0.95x. 413Kx

Key Data Points

Twitter Followers


Similarweb Unique Visitors


Majestic Referring Domains


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Siren (San Francisco) Investors (26)

Investor Name Investor Type Holding Investor Since Participating Rounds Contact Info
Aloft VC Venture Capital Minority 000 0000 000000 0
Beni Venture Capital Venture Capital Minority 000 0000 000000 0
David Helgason Angel (individual) Minority 000 0000 000000 0
Esalen Ventures Venture Capital Minority 000 0000 000000 0
Gaingels Venture Capital Minority 000 0000 000000 0
You’re viewing 5 of 26 investors. Get the full list »