# Calibrate funding: rounds and investors

> Calibrate has raised across 1 round since 2023. Investors include Founders Fund, Tiger Global Management and Samsung Next. Every round with its source.

Source: https://millionrounds.com/company/calibrate (Millionrounds; every figure on the page links to its filing or article)

United States · [Venture startup](https://millionrounds.com/companies)

# Who invested in *Calibrate*

One round we have observed, with the 5 investors named in it. Every figure came from a named source, and where the company reported a raise to the SEC itself, that is shown beside it.

Healthcare

Funding summary Updated 26 Oct 2026

**Undisclosed** raised across 1 round since 2023, from 1 source

- **Latest round:** Venture Nov 2023
- **Investors:** 5

See who backed them

## The rounds

- **Nov 2023** Venture **Amount undisclosed** [Founders Fund](https://millionrounds.com/fund/founders-fund) [Tiger Global Management](https://millionrounds.com/fund/tiger-global-management) [Samsung Next](https://millionrounds.com/fund/samsung-next) [Forerunner Ventures](https://millionrounds.com/fund/forerunner-ventures) [Optum Ventures](https://millionrounds.com/fund/optum-ventures) Source recorded

## Founders and team

From Calibrate's own website: 5 on the team.

- **Rob Rebak** CEO
- **Matt Krokosz** CTO
- **Paul Merrick** COO
- **Melissa Dorfman** VP, People
- **Suzanne Davis** VP, Clinical Operations

## Everyone who backed them

[Founders Fund](https://millionrounds.com/fund/founders-fund) VC firm **1** round

[Tiger Global Management](https://millionrounds.com/fund/tiger-global-management) VC firm **1** round

[Samsung Next](https://millionrounds.com/fund/samsung-next) Corporate VC **1** round

[Forerunner Ventures](https://millionrounds.com/fund/forerunner-ventures) VC firm **1** round

[Optum Ventures](https://millionrounds.com/fund/optum-ventures) VC firm **1** round

Missing a round, or an investor who was in one? [Tell us](https://millionrounds.com/corrections?slug=calibrate).

## Also claim to have backed them

These 2 firms list Calibrate as a portfolio company on their own websites, but no report of a round names them. They are the firms' own claims, kept apart from the rounds above.

[301](https://millionrounds.com/fund/301) Corporate VC Per its own site

[Madryn Asset Management](https://millionrounds.com/fund/madryn-asset-management) Private credit Per its own site

## Quick answers about Calibrate

### Who invested in Calibrate?

Calibrate's investors include Founders Fund, Tiger Global Management, Samsung Next, Forerunner Ventures and Optum Ventures.

### How much has Calibrate raised?

Calibrate has raised 1 round since 2023, none with a disclosed amount.

### When did Calibrate last raise?

Calibrate's most recent round was a Venture in Nov 2023.

### Who backed Calibrate first?

Calibrate's first round on record, in Nov 2023, was backed by Founders Fund, Tiger Global Management and Samsung Next and 2 others.

### What stage is Calibrate at?

Calibrate's latest named round is a Venture, in Nov 2023.

### Where is Calibrate based?

Calibrate is based in the United States.

## Companies like Calibrate

In the same sector, and raised in the last eighteen months.

[**Star Therapeutics** $325M · Oct 2026](https://millionrounds.com/company/star-therapeutics)[**Promaxo** $106M · Oct 2026](https://millionrounds.com/company/promaxo)[**AI** $18M · Oct 2026](https://millionrounds.com/company/ai)[**Baba** $40M · Oct 2026](https://millionrounds.com/company/baba)[**Rejuvenate Bio** $13M · Oct 2026](https://millionrounds.com/company/rejuvenate-bio)[**Clinical Ink** $24M · Oct 2026](https://millionrounds.com/company/clinical-ink)

## Find investors like these

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