# Holy Grail funding: rounds and investors

> Holy Grail has raised $2.7M across 1 round since 2021. Investors include Y Combinator, Charlie Songhurst and Lowercarbon Capital. Every round with its source.

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

[Seed startup](https://millionrounds.com/companies)

# Who invested in *Holy Grail*

One round we have observed, with the 3 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.

Energy

Y Combinator: S19

Funding summary Updated 26 Oct 2026

**$2.7M** raised across 1 round since 2021, from 1 source

- **Latest round:** Seed, $2.7M Jun 2021
- **Investors:** 3

See who backed them

## The rounds

- **Jun 2021** Seed **$2.7M** [Y Combinator](https://millionrounds.com/fund/y-combinator) [Charlie Songhurst](https://millionrounds.com/fund/charlie-songhurst) [Lowercarbon Capital](https://millionrounds.com/fund/lowercarbon-capital) Source recorded

## Everyone who backed them

[Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **1** round

[Charlie Songhurst](https://millionrounds.com/fund/charlie-songhurst) VC firm **1** round

[Lowercarbon Capital](https://millionrounds.com/fund/lowercarbon-capital) VC firm **1** round

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

## Also claim to have backed them

This firm lists Holy Grail as a portfolio company on their own website, but no report of a round names it. They are the firms' own claims, kept apart from the rounds above.

[U.S. Bank Arena](https://millionrounds.com/fund/u-s-bank-arena) VC firm Per its own site

## Quick answers about Holy Grail

### Who invested in Holy Grail?

Holy Grail's investors include Y Combinator, Charlie Songhurst and Lowercarbon Capital.

### How much has Holy Grail raised?

Holy Grail has raised $2.7M across 1 round since 2021.

### When did Holy Grail last raise?

Holy Grail's most recent round was a Seed of $2.7M in Jun 2021.

### What was Holy Grail's biggest round?

Its most recent round, $2.7M in Jun 2021, is also its largest on record.

### Who backed Holy Grail first?

Holy Grail's first round on record, in Jun 2021, was backed by Y Combinator, Charlie Songhurst and Lowercarbon Capital.

### What stage is Holy Grail at?

Holy Grail's latest named round is a Seed, in Jun 2021.

## Companies like Holy Grail

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

[**os.energy** $1.2M · Aug 2026](https://millionrounds.com/company/os-energy)[**CleanMax** $165M · Feb 2026](https://millionrounds.com/company/cleanmax)[**Radiance Renewables** $100M · Feb 2026](https://millionrounds.com/company/radiance-renewables)[**Turno** $4.7M · Feb 2026](https://millionrounds.com/company/turno)[**e-TRNL Energy** $3.0M · Feb 2026](https://millionrounds.com/company/e-trnl-energy)[**PolyCycl** $2.9M · Jan 2026](https://millionrounds.com/company/polycycl)

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