# Capital B funding: rounds and investors

> Capital B has raised $20M across 2 rounds since 2025. Investors include Adam Back, Maxim Group and Blockstream Capital Partners. Every round with its source.

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

France · [Funded startup](https://millionrounds.com/companies)

# Who invested in *Capital B*

2 rounds we have observed, with the 5 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 Big Data & Analytics Web3 & Crypto

Raised 5 months ago

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Funding summary Updated 5 Nov 2026

**$20M** raised across 2 rounds since 2025, from 2 sources

**$2.6M** Round **$18M** Round

- **Latest round:** Round, $18M May 2026
- **Led by:** Maxim Group
- **Step-up i:** 6.9×
- **Investors:** 5 (2 led)

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

**$2.6M** Round

**$18M** Round

- **First round:** Round, $2.6M
- **Biggest round:** $18M
- **Between rounds:** 9 months

## The rounds

- **May 2026** Round **$18M** *4 new* *1 returning* [Maxim Group](https://millionrounds.com/fund/maxim-group) Lead [Adam Back](https://millionrounds.com/fund/adam-back) [Blockstream Capital Partners](https://millionrounds.com/fund/blockstream-capital-partners) [Tobam](https://millionrounds.com/fund/tobam) [Marex](https://millionrounds.com/fund/marex) Reported by Ventureburn
- **Aug 2025** Round **$2.6M** *1 new* [Adam Back](https://millionrounds.com/fund/adam-back) Lead Reported by Silicon Canals

## 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.

**Round** 2025 **Round** 2026 [Adam Back](https://millionrounds.com/fund/adam-back) L [Maxim Group](https://millionrounds.com/fund/maxim-group) L [Blockstream Capital Partners](https://millionrounds.com/fund/blockstream-capital-partners) [Tobam](https://millionrounds.com/fund/tobam) [Marex](https://millionrounds.com/fund/marex)

## Everyone who backed them

[Adam Back](https://millionrounds.com/fund/adam-back) Angel **2** rounds, led 1

[Maxim Group](https://millionrounds.com/fund/maxim-group) VC firm **1** round, led 1

[Blockstream Capital Partners](https://millionrounds.com/fund/blockstream-capital-partners) Growth equity **1** round

[Tobam](https://millionrounds.com/fund/tobam) Angel **1** round

[Marex](https://millionrounds.com/fund/marex) Investment firm **1** round

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

## Quick answers about Capital B

### Who invested in Capital B?

Capital B's investors include Adam Back, Maxim Group, Blockstream Capital Partners, Tobam and Marex. Maxim Group led its latest round.

### How much has Capital B raised?

Capital B has raised $20M across 2 rounds since 2025.

### When did Capital B last raise?

Capital B's most recent round was an Undisclosed round of $18M in May 2026, led by Maxim Group.

### What was Capital B's biggest round?

Its most recent round, $18M in May 2026, is also its largest on record.

### Who backed Capital B first?

Capital B's first round on record, in Aug 2025, was backed by Adam Back.

### What stage is Capital B at?

Capital B's latest named round is an Undisclosed round, in May 2026.

### Where is Capital B based?

Capital B is based in France.

### Who led Capital B's rounds?

Adam Back led the Undisclosed round in 2025; Maxim Group led the Undisclosed round in 2026.

## Companies like Capital B

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

[**Fundbot** $2.6M · Oct 2026](https://millionrounds.com/company/fundbot)[**Koddex** $3.4M · Oct 2026](https://millionrounds.com/company/koddex)[**Pigment** $483M · Oct 2026](https://millionrounds.com/company/pigment)[**Wiremind** $39M · Oct 2026](https://millionrounds.com/company/wiremind)[**Verso** $6.0M · Oct 2026](https://millionrounds.com/company/verso)[**Inbolt** $29M · Oct 2026](https://millionrounds.com/company/inbolt)

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