Heartseed Inc.
Clinical-stage biotech company developing iPSC-derived highly purified ventricular cardiomyocytes for heart failure
21 employees · est. 2015 · Japan
Tenaya Therapeutics
Scaling new heights in the fight against heart disease
93 employees · est. 2016 · South San Francisco, United...
Heartseed Inc. is the older company (2015 vs 2016); Tenaya Therapeutics is the larger of the two.
Side-by-Side Comparison
| Metric | Heartseed Inc. | Tenaya Therapeutics |
|---|---|---|
| Founded | ||
| Founded | 2015 older | 2016 |
| Headquarters | ||
| Headquarters | Japan | South San Francisco, United States |
| Employees | ||
| Employees | 21 | 93 larger |
| Industry | ||
| Industry | Biotechnology, Care Economy, Health Care | Biopharma, Biotechnology, Health Care |
| Funding Stage | ||
| Funding Stage | IPO | Post Ipo Equity |
| Total Funding | ||
| Total Funding | $184.62M | $373.00M |
| Funding Rounds | ||
| Funding Rounds | 7 | 5 |
| Services | ||
| Services | Cardiac Regenerative Medicine Development, Clinical Research and Trials, Biotechnology and Stem Cell Product Development | Not tracked yet |
| Target Customers | ||
| Target Customers | Patients with Heart Failure, Medical Practitioners in Cardiac Healthcare, Healthcare Institutions, Researchers in Cardiovascular Medicine | Not tracked yet |
| Taxonomy | ||
| Taxonomy | IPSC-derived Ventricular Cardiomyocytes, Heart Failure Treatment, Cardiomyocyte Spheroids, Myocardial Regenerative Medicine, Cell Therapy, Biotech Innovation, Stem Cell Technology, Cardiovascular Therapy, Heart Cell Transplantation, Clinical-stage Biotech, Regenerative Medicine, Cardiac Cell Therapy, Biotherapeutics, Cardiovascular Regeneration | Clinical Stage, Heart Disease, Therapeutics, Disease-modifying Therapies, Heart Failure, Cardiomyopathies, Gene Therapy, Precision Medicine, Cellular Regeneration, Cardiac Development, Regenerative Medicine, Rare Diseases, Cellular Reprogramming, IPSC-Cardiomyocytes |
| Website | ||
| Website | heartseed.jp | tenayatherapeutics.com |
About Heartseed Inc.
Heartseed Inc. is a clinical-stage biotech company known for its expertise in developing iPSC-derived highly purified ventricular cardiomyocytes, a technology poised to revolutionize the treatment of heart failure. Founded in 2015 and headquartered in Japan, the company operates at the intersection...
About Tenaya Therapeutics
Tenaya Therapeutics is a clinical stage biotechnology company founded in 2016 by leading cardiovascular scientists from the David J. Gladstone Institutes and the University of Texas Southwestern Medical Center. The company's slogan "Scaling new heights in the fight against heart disease" reflects it...
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Compiled from the BounceWatch company index. We last looked at Heartseed Inc. on 15 Jun 2026, and Tenaya Therapeutics on 9 Jun 2026. Where a field is blank here, it means we have not recorded it — not that the answer is zero. How we source and date this.
