# Attochron funding: rounds and investors

> Attochron has raised $15M across 1 round since 2024. Investors include Citibank. Every round with its source.

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

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

# Who invested in *Attochron*

One round we have observed, with the one investor 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.

Telecoms

Funding summary Updated 26 Oct 2026

**$15M** raised across 1 round since 2024, from 1 source

- **Latest round:** Series A, $15M Oct 2024
- **Investors:** 1

See who backed them

## The rounds

- **Oct 2024** Series A **$15M** [Citibank](https://millionrounds.com/fund/citi) Source recorded

## Everyone who backed them

[Citibank](https://millionrounds.com/fund/citi) Growth equity **1** round

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

## Quick answers about Attochron

### Who invested in Attochron?

Attochron's investors include Citibank.

### How much has Attochron raised?

Attochron has raised $15M across 1 round since 2024.

### When did Attochron last raise?

Attochron's most recent round was a Series A of $15M in Oct 2024.

### What was Attochron's biggest round?

Its most recent round, $15M in Oct 2024, is also its largest on record.

### Who backed Attochron first?

Attochron's first round on record, in Oct 2024, was backed by Citibank.

### What stage is Attochron at?

Attochron's latest named round is a Series A, in Oct 2024.

### Where is Attochron based?

Attochron is based in the United States.

## Companies like Attochron

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

[**TruAgents** $3.4M · Oct 2026](https://millionrounds.com/company/truagents)[**Qualitate** $32M · Oct 2026](https://millionrounds.com/company/qualitate)[**Clockout** $5.5M · Oct 2026](https://millionrounds.com/company/clockout)[**Hubble Network** $270M · Sept 2026](https://millionrounds.com/company/hubble-network)[**Delos Data** $100M · Sept 2026](https://millionrounds.com/company/delos-data)[**Celero Communications** $375M · Sept 2026](https://millionrounds.com/company/celero-communications)

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