# MirrorTab

> MirrorTab is a San Francisco cybersecurity startup that stops browser-based attacks by moving the browser session server-side. Its isolation technology intercepts and sanitizes a web session at the edge before it ever reaches a user's device, so malware, malicious extensions, bots, and AI-driven automation never touch the application's code, data, or APIs. Founded in 2021 by Honey co-founder Brian Silverstein, the company raised an $8.5M seed round led by Valley Capital Partners in February 2025 and targets financial services, e-commerce, and government.

- **Founded:** 2021
- **Headquarters:** San Francisco, United States
- **Founders:** Brian Silverstein (Founder & CEO (co-founder / former CTO of Honey))
- **Team size:** ~12 employees
- **Products:** MirrorTab Session Isolation, No-DOM-Exposure Protection, Edge-Triggered Deployment, Bot & Automation Blocking
- **Notable:** Raised $8.5M seed round led by Valley Capital Partners with GV participation (Feb 2025), Assembled a marquee cybersecurity advisory board of CISO/CRO-level leaders from Reddit, SoFi, Chime, Databricks, and Bank of America (Mar 2025), Founded by the co-founder/CTO of Honey, acquired by PayPal for a reported $4B

## Products & services

- **MirrorTab Session Isolation** — Server-side browser isolation that intercepts and sanitizes a web session at the edge before it reaches the user's device, obfuscating data, code, and APIs so no raw application code is ever exposed in the browser.
- **No-DOM-Exposure Protection** — Prevents browser extensions and injected scripts from reading submitted fields, extracting data, or modifying the DOM, defeating Magecart, formjacking, and skimming attacks.
- **Edge-Triggered Deployment** — Runs through existing edge infrastructure (CDNs, WAFs) and is invoked by WAF rules, bot scores, authentication state, or feature flags - no plugins, agents, or code changes required.
- **Bot & Automation Blocking** — Disables automation in critical workflows to stop account takeover, credential stuffing, transaction fraud, content scraping, and API abuse, including AI-driven and agentic attacks.

## Achievements

- Raised $8.5M seed round led by Valley Capital Partners with GV participation (Feb 2025)
- Assembled a marquee cybersecurity advisory board of CISO/CRO-level leaders from Reddit, SoFi, Chime, Databricks, and Bank of America (Mar 2025)
- Founded by the co-founder/CTO of Honey, acquired by PayPal for a reported $4B
- Pioneering the 'browser as the new corporate endpoint' security category

## Latest updates

- **2025-02** — Emerged from stealth with an $8.5M seed round to shield web apps from hacking, bots, and malware.
- **2025-03** — Announced a Cybersecurity Advisory Board of top security and risk executives from Reddit, SoFi, Chime, Databricks, and Bank of America.
- **2026-06** — Appointed a veteran COO to scale go-to-market as it pushes the 'browser as the new corporate endpoint' thesis.

## Links

- Website: https://mirrortab.com
- LinkedIn: https://www.linkedin.com/company/mirrortab
- Twitter/X: https://x.com/MirrorTab

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Profile page: https://yespress.io/mirrortab
Published by YesPress — https://yespress.io
Last updated: 2026-08-03