# TestBox funding: rounds and investors

> TestBox has raised $12M across 1 round since 2026. Investors include Felicis, SignalFire and Firstminute Capital. Every round with its source.

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

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

# Who invested in *TestBox*

One round we have observed, with the 4 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

Raised 8 months ago

Funding summary Updated 26 Oct 2026

**$12M** raised across 1 round since 2026, from 1 source

- **Latest round:** Series A, $12M Mar 2026
- **Investors:** 4

See who backed them

## The rounds

- **Mar 2026** Series A **$12M** [Felicis](https://millionrounds.com/fund/felicis-ventures) [SignalFire](https://millionrounds.com/fund/signalfire) [Firstminute Capital](https://millionrounds.com/fund/firstminute-capital) [GTMfund](https://millionrounds.com/fund/gtmfund) Source recorded

## Everyone who backed them

[Felicis](https://millionrounds.com/fund/felicis-ventures) VC firm **1** round

[SignalFire](https://millionrounds.com/fund/signalfire) VC firm **1** round

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

[GTMfund](https://millionrounds.com/fund/gtmfund) VC firm **1** round

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

## Quick answers about TestBox

### Who invested in TestBox?

TestBox's investors include Felicis, SignalFire, Firstminute Capital and GTMfund.

### How much has TestBox raised?

TestBox has raised $12M across 1 round since 2026.

### When did TestBox last raise?

TestBox's most recent round was a Series A of $12M in Mar 2026.

### What was TestBox's biggest round?

Its most recent round, $12M in Mar 2026, is also its largest on record.

### Who backed TestBox first?

TestBox's first round on record, in Mar 2026, was backed by Felicis, SignalFire and Firstminute Capital and 1 others.

### What stage is TestBox at?

TestBox's latest named round is a Series A, in Mar 2026.

### Where is TestBox based?

TestBox is based in the United States.

## Companies like TestBox

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

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