# ShiftLeft funding: rounds and investors

> ShiftLeft has raised $29M across 2 rounds since 2017. Investors include Bain Capital Ventures, Mayfield Fund and Bain & Company. Every round with its source.

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

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

# Who invested in *ShiftLeft*

2 rounds we have observed, with the 7 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.

Cybersecurity

Funding summary Updated 26 Oct 2026

**$29M** raised across 2 rounds since 2017, from 2 sources

**$9.3M** Series A **$20M** Series B

- **Latest round:** Series B, $20M Feb 2019
- **Step-up i:** 2.2×
- **Investors:** 7

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.

2018 2019

**$9.3M** Series A

**$20M** Series B

- **First round:** Series A, $9.3M
- **Biggest round:** $20M
- **Between rounds:** 16 months

## The rounds

- **Feb 2019** Series B **$20M** *3 new* [Mayfield Fund](https://millionrounds.com/fund/mayfield) [Bain & Company](https://millionrounds.com/fund/bain-and-company) Thomvest Ventures/ SineWave Reported by FinSMEs SEC filing: $15M sold, first sale Oct 2018
- **Oct 2017** Series A **$9.3M** *4 new* [Bain Capital Ventures](https://millionrounds.com/fund/bain-capital-ventures) Mayfield/ Sanjay Poonen Prabhu Goel Tobias Knaup Reported by FinSMEs

## 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.

**Series A** 2017 **Series B** 2019 [Bain Capital Ventures](https://millionrounds.com/fund/bain-capital-ventures) [Mayfield Fund](https://millionrounds.com/fund/mayfield) [Bain & Company](https://millionrounds.com/fund/bain-and-company) Mayfield/ Sanjay Poonen Prabhu Goel Thomvest Ventures/ SineWave Tobias Knaup

## Everyone who backed them

[Bain Capital Ventures](https://millionrounds.com/fund/bain-capital-ventures) VC firm **1** round

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

[Bain & Company](https://millionrounds.com/fund/bain-and-company) VC firm **1** round

Mayfield/ Sanjay Poonen no record of our own yet **1** round

Prabhu Goel no record of our own yet **1** round

Thomvest Ventures/ SineWave no record of our own yet **1** round

Tobias Knaup no record of our own yet **1** round

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

## Quick answers about ShiftLeft

### Who invested in ShiftLeft?

ShiftLeft's investors include Bain Capital Ventures, Mayfield Fund, Bain & Company, Mayfield/ Sanjay Poonen and Prabhu Goel, and 2 more on record.

### How much has ShiftLeft raised?

ShiftLeft has raised $29M across 2 rounds since 2017.

### When did ShiftLeft last raise?

ShiftLeft's most recent round was a Series B of $20M in Feb 2019.

### What was ShiftLeft's biggest round?

Its most recent round, $20M in Feb 2019, is also its largest on record.

### Who backed ShiftLeft first?

ShiftLeft's first round on record, in Oct 2017, was backed by Bain Capital Ventures, Mayfield/ Sanjay Poonen and Prabhu Goel and 1 others.

### What stage is ShiftLeft at?

ShiftLeft's latest named round is a Series B, in Feb 2019.

### Where is ShiftLeft based?

ShiftLeft is based in the United States.

## Companies like ShiftLeft

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

[**FORT Robotics** $39M · Oct 2026](https://millionrounds.com/company/fort-robotics)[**Opsin** $21M · Oct 2026](https://millionrounds.com/company/opsin)[**Harmonic Security** $68M · Oct 2026](https://millionrounds.com/company/harmonic-security)[**Reach Security** $60M · Oct 2026](https://millionrounds.com/company/reach-security)[**Persona** $210M · Oct 2026](https://millionrounds.com/company/persona)[**Hilt** $4.7M · Oct 2026](https://millionrounds.com/company/hilt)

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