# Simanta Das

> Simanta Das is a seed investor at Ayursundra (Amsterdam) backing Health Care and Apps. See 5 investments, check sizes, portfolio. Updated Aug 2026.

- Type: Angel Investor
- Fund: [Ayursundra](https://shizune.co/investors/profile/ayursundra)
- Location: Amsterdam, The Netherlands
- Total investments: 5
- Last investment: Oct 2021
- Lead investor: 40%
- Last updated: Aug 2026
- LinkedIn: https://www.linkedin.com/in/simanta-das-9195b9/
- X (Twitter): https://twitter.com/Ayursundrian
- Website: https://x.com/Ayursundrian

Simanta Das is a Managing Partner at Stalhmarg and Founder of Rising Stars Ventures.

## Investment focus

### Industry

| Industry | Investments | Share |
| --- | --- | --- |
| Health Care | 3 | 60% |
| Apps | 1 | 20% |
| Education | 1 | 20% |
| Medical Device | 1 | 20% |
| Personalization | 1 | 20% |

6 industries tracked in total.

### Stage

| Stage | Investments | Share |
| --- | --- | --- |
| Seed | 1 | 20% |
| Angel | 1 | 20% |
| Pre-Seed | 1 | 20% |
| Series A | 1 | 20% |
| Convertible Note | 1 | 20% |

### Country

| Country | Investments | Share |
| --- | --- | --- |
| Greece | 1 | 20% |
| United Kingdom | 1 | 20% |
| The Netherlands | 1 | 20% |

## Investments

| Company | Description | Amount | Stage | Date | Website |
| --- | --- | --- | --- | --- | --- |
| Fika | Digital mental fitness platform and provider of remote mental fitness courses to education, workplace and healthcare | $1.6M | Seed | Oct 14, 2021 |  |
| RTsafe | Founded in 2014, RTsafe is introducing Individualized Care to Radiation Oncology. It designs and manufactures the first FDA-cleared, patient-specific, anatomically-exact models of human head and brain tissue. These are offered to Radiotherapy clinics for simulating radiation therapy for each patient ahead of actual treatment in a totally risk-freeenvironment, thus maximizing cancer patient safety and treatment effectiveness during radiation therapy. This solution is also sold to RT equipment manufacturers for machine-testing purposes. After winning a R&D 100 Award, RTsafe’s PseudoPatientTM is recognized as one of the 100 most significant high-tech products worldwide for 2019. The company’s vision is a world where every radiotherapy intervention is tested on a PseudoPatient® before the real patient. | $1M | Convertible Note | Mar 01, 2019 |  |
| NeuroReality | NeuroReality is developing Koji’s Quest, a unique VR-based SAAS solution that puts the patient at the center of the rehabilitation experience & connects all key stakeholders by providing patients with better health outcomes, allowing clinicians to deliver superior care to more patients without increasing care costs, & permits insurancecompanies to save money while improving care standards. NeuroReality registered 19-12-2017 and is working with a team of 12 devoted developers, neuroscience researchers, creatives and business developers. | $849K | Pre-Seed | May 01, 2018 |  |
| RTsafe | Founded in 2014, RTsafe is introducing Individualized Care to Radiation Oncology. It designs and manufactures the first FDA-cleared, patient-specific, anatomically-exact models of human head and brain tissue. These are offered to Radiotherapy clinics for simulating radiation therapy for each patient ahead of actual treatment in a totally risk-freeenvironment, thus maximizing cancer patient safety and treatment effectiveness during radiation therapy. This solution is also sold to RT equipment manufacturers for machine-testing purposes. After winning a R&D 100 Award, RTsafe’s PseudoPatientTM is recognized as one of the 100 most significant high-tech products worldwide for 2019. The company’s vision is a world where every radiotherapy intervention is tested on a PseudoPatient® before the real patient. | $2.3M | Series A | Mar 01, 2017 |  |
| RTsafe | Founded in 2014, RTsafe is introducing Individualized Care to Radiation Oncology. It designs and manufactures the first FDA-cleared, patient-specific, anatomically-exact models of human head and brain tissue. These are offered to Radiotherapy clinics for simulating radiation therapy for each patient ahead of actual treatment in a totally risk-freeenvironment, thus maximizing cancer patient safety and treatment effectiveness during radiation therapy. This solution is also sold to RT equipment manufacturers for machine-testing purposes. After winning a R&D 100 Award, RTsafe’s PseudoPatientTM is recognized as one of the 100 most significant high-tech products worldwide for 2019. The company’s vision is a world where every radiotherapy intervention is tested on a PseudoPatient® before the real patient. | $400K | Angel | May 05, 2016 |  |

5 of 5 investments shown.

## Co-investors
- [VentureFriends](https://shizune.co/investors/profile/venturefriends) — VC Fund, 1 deal together

## About Ayursundra

VC Fund



1 contacts available at Ayursundra.

| Name | Title | Profile |
| --- | --- | --- |
| Simanta Das | Founder & Chairman | https://shizune.co/investors/profile/simanta-das |

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## FAQ

### What does Simanta Das invest in?

Simanta Das invests primarily in Health Care, Apps and Education startups, most often at Seed and Angel stage. Most of the 5 investments tracked by Shizune back companies in Greece. The Investment Focus section breaks down every industry, stage and country in the portfolio.

### When did Simanta Das last invest?

The most recent investment recorded for Simanta Das closed in Oct 2021. Shizune tracks 5 investments in total for this profile, including round sizes, stages and portfolio companies, all sourced from confirmed public funding rounds and refreshed monthly.

### Is Shizune's investor data accurate?

Yes — every stat on this profile is calculated from confirmed public funding rounds monitored across hundreds of sources since 2020. This profile was last refreshed in Aug 2026 and is updated monthly. Spotted something off? Use the “Suggest an edit” link near the top of the page.

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