Series A
Rein Security raises $25M Series A
$25M
Rein Security raised $25M in a Series A round1, announced Oct 8, 20261, led by Glilot Capital and Sienna Venture Capital1.
Also participating: Corner Ventures, Atlacle and RNP Capital Advisors1.
Lead investors
- Glilot Capital
- Sienna Venture Capital
Also participating
- Corner Ventures
- Atlacle
- RNP Capital Advisors
Rein Security funding path
Rein Security funding history
Sources
- 1Calcalist (CTech), Oct 8, 2026. “Rein Security raises $25 million Series A as companies struggle to control their AI agents”
- 2CTech, Jan 28, 2026. “8200 alumni raise $8 million Seed round for Rein Security as AppSec faces the AI era”
How much did Rein Security raise in its Series A?
Rein Security raised $25M in its Series A, announced Oct 8, 2026.
Who led Rein Security’s Series A?
The round was led by Glilot Capital and Sienna Venture Capital.
Which investors took part in Rein Security’s Series A?
Participants: Glilot Capital, Sienna Venture Capital, Corner Ventures, Atlacle and RNP Capital Advisors.
How much has Rein Security raised in total?
Rein Security has raised $33M across 2 recorded rounds.