# Leadbay funding: rounds and investors

> Leadbay has raised $1.0M across 2 rounds since 2025. Investors include Y Combinator, Rebel Fund and Alumni Ventures. Every round with its source.

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

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

# Who invested in *Leadbay*

2 rounds we have observed, with the 4 investors named in them. 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 6 months ago

Funding summary Updated 26 Oct 2026

**$1.0M** raised across 2 rounds since 2025, from 2 sources

**$500K** Seed **$500K** Seed

- **Latest round:** Seed, $500K May 2026
- **Investors:** 4

See who backed them

## The funding story

Each circle is a round, placed by date and sized by amount. The line above is the running total.

2026

**$500K** Seed

**$500K** Seed

- **First round:** Seed, $500K
- **Biggest round:** $500K
- **Between rounds:** 5 months

## The rounds

- **May 2026** Seed **$500K** *2 new* *2 returning* [Y Combinator](https://millionrounds.com/fund/y-combinator) [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) [Rebel Fund](https://millionrounds.com/fund/rebel-fund) [Transpose Platform Management](https://millionrounds.com/fund/transpose-platform-management) Source recorded
- **Dec 2025** Seed **$500K** *2 new* [Y Combinator](https://millionrounds.com/fund/y-combinator) [Rebel Fund](https://millionrounds.com/fund/rebel-fund) Source recorded

## Who was in which round

The busiest backers across the latest rounds. A filled square is a round they joined; a dark one, a round they led.

**Seed** 2025 **Seed** 2026 [Y Combinator](https://millionrounds.com/fund/y-combinator) [Rebel Fund](https://millionrounds.com/fund/rebel-fund) [Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) [Transpose Platform Management](https://millionrounds.com/fund/transpose-platform-management)

## Everyone who backed them

[Y Combinator](https://millionrounds.com/fund/y-combinator) Accelerator **2** rounds

[Rebel Fund](https://millionrounds.com/fund/rebel-fund) VC firm **2** rounds

[Alumni Ventures](https://millionrounds.com/fund/us-strategic-tech-fund-an-alumni-ventures-fund) VC firm **1** round

[Transpose Platform Management](https://millionrounds.com/fund/transpose-platform-management) VC firm **1** round

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

## Quick answers about Leadbay

### Who invested in Leadbay?

Leadbay's investors include Y Combinator, Rebel Fund, Alumni Ventures and Transpose Platform Management.

### How much has Leadbay raised?

Leadbay has raised $1.0M across 2 rounds since 2025.

### When did Leadbay last raise?

Leadbay's most recent round was a Seed of $500K in May 2026.

### What was Leadbay's biggest round?

Its most recent round, $500K in May 2026, is also its largest on record.

### Who backed Leadbay first?

Leadbay's first round on record, in Dec 2025, was backed by Y Combinator and Rebel Fund.

### What stage is Leadbay at?

Leadbay's latest named round is a Seed, in May 2026.

### Where is Leadbay based?

Leadbay is based in the United States.

## Companies like Leadbay

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

[**SpaceX** $42B · Oct 2026](https://millionrounds.com/company/spacex)[**xPay** $1.5M · Oct 2026](https://millionrounds.com/company/xpay)[**Albert Invent** $20M · Oct 2026](https://millionrounds.com/company/albert-invent)[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**Pika** $216M · Oct 2026](https://millionrounds.com/company/pika)[**Vertical Semiconductor** $84M · Oct 2026](https://millionrounds.com/company/vertical-semiconductor)

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