# Rein Security funding: rounds and investors

> Rein Security has raised $25M across 1 round since 2026. Investors include Sienna Venture Capital, Glilot Capital and Corner. Every round with its source.

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

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

# Who invested in *Rein Security*

One round we have observed, with the 5 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.

AI Cybersecurity Enterprise software

Raised 1 month ago

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Funding summary Updated 15 Nov 2026

**$25M** raised across 1 round since 2026, from 3 sources

- **Latest round:** Series A, $25M Oct 2026
- **Led by:** Sienna Venture Capital and Glilot Capital
- **Investors:** 5 (2 led)

See who backed them

## The rounds

- **Oct 2026** Series A **$25M** [Sienna Venture Capital](https://millionrounds.com/fund/sienna-venture-capital) Lead Glilot Capital Lead [Corner](https://millionrounds.com/fund/corner-2) [Atlacle](https://millionrounds.com/fund/atlacle) [RNP Capital Advisors](https://millionrounds.com/fund/rnp-capital-advisors) Reported by Fintech Global and 2 others

## Founders and team

From Rein Security's own website: 5 founders, 1 on the team.

**Guy Nizan** CEO & Founder at Recapp

**Matan Bar Efrat** Co Founder & CEO

**Netanel Rubin** Co-Founder & CTO

**Maor Hizkiev** Founder at BitDam

**Arik Kleinstein** Founder

- **Gal Nakash** Cofounder & CPO at Reco

## Everyone who backed them

[Sienna Venture Capital](https://millionrounds.com/fund/sienna-venture-capital) VC firm **1** round, led 1

Glilot Capital no record of our own yet **1** round, led 1

[Corner](https://millionrounds.com/fund/corner-2) VC firm **1** round

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

[RNP Capital Advisors](https://millionrounds.com/fund/rnp-capital-advisors) VC firm **1** round

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

## Quick answers about Rein Security

### Who invested in Rein Security?

Rein Security's investors include Sienna Venture Capital, Glilot Capital, Corner, Atlacle and RNP Capital Advisors. Sienna Venture Capital led its latest round.

### How much has Rein Security raised?

Rein Security has raised $25M across 1 round since 2026.

### When did Rein Security last raise?

Rein Security's most recent round was a Series A of $25M in Oct 2026, led by Sienna Venture Capital.

### What was Rein Security's biggest round?

Its most recent round, $25M in Oct 2026, is also its largest on record.

### Who backed Rein Security first?

Rein Security's first round on record, in Oct 2026, was backed by Sienna Venture Capital, Glilot Capital and Corner and 2 others.

### What stage is Rein Security at?

Rein Security's latest named round is a Series A, in Oct 2026.

### Where is Rein Security based?

Rein Security is based in Israel.

### Who led Rein Security's rounds?

Sienna Venture Capital led the Series A in 2026.

## Companies like Rein Security

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

[**Sentra** $205M · Nov 2026](https://millionrounds.com/company/sentra)[**Blockaid** $90M · Nov 2026](https://millionrounds.com/company/blockaid)[**Mave** $34M · Oct 2026](https://millionrounds.com/company/mave)[**doubleAI** $200M · Oct 2026](https://millionrounds.com/company/doubleai)[**HyperGuest** $25M · Sept 2026](https://millionrounds.com/company/hyperguest)[**Cyera** $2.5B · Sept 2026](https://millionrounds.com/company/cyera)

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