# Reactor funding: rounds and investors

> Reactor has raised $59M across 1 round since 2026. Investors include Lightspeed Venture Partners, Abstract Ventures and Amplify Partners.

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

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

# Who invested in *Reactor*

One round we have observed, with the 6 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.

AI Construction Entertainment Genomics

Raised 5 months ago

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Funding summary Updated 5 Nov 2026

**$59M** raised across 1 round since 2026, from 1 source

- **Latest round:** Series A, $59M May 2026
- **Led by:** Lightspeed Venture Partners
- **Investors:** 6 (1 led)

See who backed them

## The rounds

- **May 2026** Series A **$59M** [Lightspeed Venture Partners](https://millionrounds.com/fund/lightspeed-venture-partners) Lead [Abstract Ventures](https://millionrounds.com/fund/abstract) [Amplify Partners](https://millionrounds.com/fund/amplify-partners) [WndrCo](https://millionrounds.com/fund/wndrco) [Sky9 Capital](https://millionrounds.com/fund/sky9-capital) [FPV Ventures](https://millionrounds.com/fund/fpv-ventures) Reported by Ventureburn SEC filing: $25M sold

## Everyone who backed them

[Lightspeed Venture Partners](https://millionrounds.com/fund/lightspeed-venture-partners) VC firm **1** round, led 1

[Abstract Ventures](https://millionrounds.com/fund/abstract) VC firm **1** round

[Amplify Partners](https://millionrounds.com/fund/amplify-partners) VC firm **1** round

[WndrCo](https://millionrounds.com/fund/wndrco) Private equity **1** round

[Sky9 Capital](https://millionrounds.com/fund/sky9-capital) VC firm **1** round

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

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

## Also claim to have backed them

These 3 firms list Reactor 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.

[Sapphire Ventures](https://millionrounds.com/fund/sapphire-ventures) VC firm Per its own site

[Abhay](https://millionrounds.com/fund/abhay) Angel network Per its own site

[Hawk Hill Ventures](https://millionrounds.com/fund/hawk-hill-ventures) VC firm Per its own site

## Quick answers about Reactor

### Who invested in Reactor?

Reactor's investors include Lightspeed Venture Partners, Abstract Ventures, Amplify Partners, WndrCo and Sky9 Capital, and 1 more on record. Lightspeed Venture Partners led its latest round.

### How much has Reactor raised?

Reactor has raised $59M across 1 round since 2026.

### When did Reactor last raise?

Reactor's most recent round was a Series A of $59M in May 2026, led by Lightspeed Venture Partners.

### What was Reactor's biggest round?

Its most recent round, $59M in May 2026, is also its largest on record.

### Who backed Reactor first?

Reactor's first round on record, in May 2026, was backed by Lightspeed Venture Partners, Abstract Ventures and Amplify Partners and 3 others.

### What stage is Reactor at?

Reactor's latest named round is a Series A, in May 2026.

### Who led Reactor's rounds?

Lightspeed Venture Partners led the Series A in 2026.

## Companies like Reactor

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

[**Nirva** $25M · Oct 2026](https://millionrounds.com/company/nirva)[**Lovi** $15M · Oct 2026](https://millionrounds.com/company/lovi)[**Palma.ai** $1.8M · Sept 2026](https://millionrounds.com/company/palma-ai)[**Hang Ten Systems** $53M · Sept 2026](https://millionrounds.com/company/hang-ten-systems)[**OriginalVoices** $1.3M · Sept 2026](https://millionrounds.com/company/originalvoices)[**Positron AI** $875M · Sept 2026](https://millionrounds.com/company/positron-ai)

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