# Startups worth a look, September 2026

> 3 startups worth a look in September 2026, and the evidence for each: rounds, leads, hiring and filings.

Source: https://millionrounds.com/featured/2026-09 (Millionrounds; every figure on the page links to its filing or article)

Millionrounds

# Featured

No. 1 September 2026 3 companies Never paid for

Cover story

## CodeRabbit

Raised $143M in a Series C in Aug 2026, led by Atomico and Smash Capital.

**$143M** Series C, led by Atomico

- 02 **PhysicsX** $300M Series C, 42 open roles
- 03 **Airbound** $37M Series A, 17 open roles
- $480M raised between them in their latest rounds

Next issue 1 November · in 6 days

## [CodeRabbit](https://millionrounds.com/company/coderabbit)

Information technology & services San Francisco, United States founded 2023

The last two rounds

**$60M** Series B Sept 2025 *11 months* **2.4x** **$143M** Series C Aug 2026

Led by Atomico Smash Capital

$203M across 2 rounds on the record

CodeRabbit is an AI-powered platform that automates code reviews for software development teams. It provides context-aware, line-by-line feedback and improvement suggestions, enhancing code quality and speeding up the software shipping process.

Why it is worth a look

- Raised $143M in a Series C in Aug 2026, led by Atomico and Smash Capital.
- That came 11 months after its Series B of $60M in Sept 2025.
- Hiring for 42 open roles on its own job board.

Each line is on the company's record. [Check it](https://millionrounds.com/company/coderabbit)

## [PhysicsX](https://millionrounds.com/company/physicsx)

Information technology & services London, United Kingdom founded 2019

The last two rounds

**$22M** Round Feb 2026 *4 months* **14x** **$300M** Series C Jun 2026

Led by Temasek

$477M across 4 rounds on the record

PhysicsX is a London-based deeptech company that develops an AI-native engineering software platform aimed at transforming how industrial organizations design, simulate, and manufacture complex physical systems.

Why it is worth a look

- Raised $300M in a Series C in Jun 2026, led by Temasek.
- That came 11 months after its Series B of $135M in Jun 2025.
- Hiring for 42 open roles on its own job board.

Each line is on the company's record. [Check it](https://millionrounds.com/company/physicsx)

## [Airbound](https://millionrounds.com/company/airbound)

Aviation & aerospace Bengaluru, India founded 2020

The last two rounds

**$8.7M** Seed Oct 2025 *10 months* **4.3x** **$37M** Series A Aug 2026

Led by Greenoaks

$46M across 2 rounds on the record

Airbound is an Indian deep-tech aerospace company based in Bengaluru, founded in 2020. The company specializes in advanced drone delivery technology aimed at making logistics efficient and cost-effective.

Why it is worth a look

- Raised $37M in a Series A in Aug 2026, led by Greenoaks.
- That came 10 months after its seed of $8.7M in Oct 2025.
- Hiring for 17 open roles on its own job board.

Each line is on the company's record. [Check it](https://millionrounds.com/company/airbound)

How we pick

Every month the record proposes candidates: companies that just raised, especially from busy lead investors or soon after their last round, whose valuation stepped up in their own filings, that are hiring hard, or whose founders listed them with us. An editor chooses, and every reason is something you can check on the company's page.

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Founders: [list your startup](https://millionrounds.com/list-your-startup). Investors: every company raising now is in [Startup Dealflow](https://millionrounds.com/dealflow).

Every issue

[No. 2 October 2026 Oct](https://millionrounds.com/featured/2026-10)[No. 1 September 2026 Sept](https://millionrounds.com/featured/2026-09)