Rein Security

See Beyond the Prompt

[Rein Security @ReinAgentSec]

Rein is officially on the @Google Marketplace.

Which means:

1. Virtual tea party.
2. You can now deploy Rein even easier to secure your most business-critical agents.

You probably care more about #2.
https://t.co/Cxv4rvnih3

[Rein Security @ReinAgentSec]

Starting in a few hours.

See you there?

https://t.co/DKG8aA0LqY

[Rein Security @ReinAgentSec]

MCP = Model Compromise Pipeline?

MCP tool poisoning is a new class of attack that lets adversaries manipulate the tools behind enterprise AI agents - quietly influencing outputs, decisions, and behavior from the inside out.

Read about it here: https://t.co/OsrqfYrlRJ

[Rein Security @ReinAgentSec]

Join us for a webinar hosted by Cybersecurity Dive where our CEO Matan Bar-Efrat will be joined by Phillip Miller, MA, CISSP, Vice President & Global Chief Information Security Officer at H&R Block

📅 Thursday, May 28, 2026
🕑 2:00 PM EDT

Register: https://t.co/UDioRYNcMQ

[Rein Security @ReinAgentSec]

If you're in agentic AI security - you need some peace of mind. #agentic

[Rein Security @ReinAgentSec]

@arikkleinstein is no stranger to great tech. For more than 25 years, he has founded, scaled, and backed innovative technology companies.

Hear why @GlilotP invested in Rein- and why Arik believes the AppSec industry is overdue for a serious reality check: https://t.co/Cd4ukQXWVW

[Rein Security @ReinAgentSec]

Your AI agents aren’t doing what you think they’re doing.

Netanel Rubin, our Co-founder and CTO, breaks down how to uncover what your MCPs and agents actually do behind closed doors, AFTER a prompt is sent.

[Rein Security @ReinAgentSec]

Unlike most AppSec tools, we value silence.
If there’s nothing to stress about, you’ll hear nothing from Rein.
Real value is staying quiet — and only alerting you when something is actually important.

Have a quiet, alertless weekend.

[Rein Security @ReinAgentSec]

Philip Miller - CISO at H&R Block - has a lot to say about Rein and the future of AppSec.
Read here: https://t.co/58RC6hklDl

[Rein Security @ReinAgentSec]

We are Rein and we approve this message:

https://t.co/rxXOTJmgOO

@helpnetsecurity

[Rein Security @ReinAgentSec]

Thank you @kevtownsend for this feature about us on SecurityWeek.

Our favorite part has to be this - "Securing production applications from the inside – Rein Security offers a new approach to application security."

We're humbled.

Read it here: https://t.co/C9rhweXler

[Rein Security @ReinAgentSec]

Today, Rein launches to bring reality to AppSec.

AppSec didn’t need another tool.
It needed context.
No more guessing how apps behave.
No more proxies.
No more assumptions.

Reality, finally.