# Abacum funding: rounds and investors

> Abacum has raised $60M across 1 round since 2025. Investors include Y Combinator, FJ Labs and K Fund. Every round with its source.

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

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

# Who invested in *Abacum*

One round we have observed, with the 7 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.

Financial Services

Funding summary Updated 26 Oct 2026

**$60M** raised across 1 round since 2025, from 1 source

- **Latest round:** Series B, $60M Jun 2025
- **Investors:** 7

See who backed them

## The rounds

- **Jun 2025** Series B **$60M** [Y Combinator](https://millionrounds.com/fund/y-combinator) [FJ Labs](https://millionrounds.com/fund/fj-labs) [K Fund](https://millionrounds.com/fund/kfund) [Creandum](https://millionrounds.com/fund/creandum) [Atomico](https://millionrounds.com/fund/atomico) [Cathay Innovation](https://millionrounds.com/fund/cathay-innovation) [S16vc](https://millionrounds.com/fund/s16vc-founders-for-founders-fund) Source recorded SEC filing: $43M sold, first sale May 2025

## Everyone who backed them

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

[FJ Labs](https://millionrounds.com/fund/fj-labs) VC firm **1** round

[K Fund](https://millionrounds.com/fund/kfund) VC firm **1** round

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

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

[Cathay Innovation](https://millionrounds.com/fund/cathay-innovation) VC firm **1** round

[S16vc](https://millionrounds.com/fund/s16vc-founders-for-founders-fund) Angel network **1** round

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

## Also claim to have backed them

These 3 firms list Abacum 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.

[Western Technology Investment](https://millionrounds.com/fund/wti) VC firm Per its own site

[PROfounders Capital](https://millionrounds.com/fund/profounders-capital) VC firm Per its own site

[Quint Ventures](https://millionrounds.com/fund/quint-ventures) Angel network Per its own site

## Quick answers about Abacum

### Who invested in Abacum?

Abacum's investors include Y Combinator, FJ Labs, K Fund, Creandum and Atomico, and 2 more on record.

### How much has Abacum raised?

Abacum has raised $60M across 1 round since 2025.

### When did Abacum last raise?

Abacum's most recent round was a Series B of $60M in Jun 2025.

### What was Abacum's biggest round?

Its most recent round, $60M in Jun 2025, is also its largest on record.

### Who backed Abacum first?

Abacum's first round on record, in Jun 2025, was backed by Y Combinator, FJ Labs and K Fund and 4 others.

### What stage is Abacum at?

Abacum's latest named round is a Series B, in Jun 2025.

### Where is Abacum based?

Abacum is based in the United States.

## Companies like Abacum

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

[**xPay** $1.5M · Oct 2026](https://millionrounds.com/company/xpay)[**Kalshi** $2.7B · Oct 2026](https://millionrounds.com/company/kalshi)[**STRIVE** $1.3B · Oct 2026](https://millionrounds.com/company/strive)[**CapitalOS** $52M · Oct 2026](https://millionrounds.com/company/capitalos)[**Platform Accounting Group** $355M · Oct 2026](https://millionrounds.com/company/platform-accounting-group)[**Ramp** $4.5B · Oct 2026](https://millionrounds.com/company/ramp)

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