Seal Security is an application security company founded in 2021 by former Israeli Unit 8200 members Itamar Sher (CEO), Lev Pachmanov (CTO), and Alon Navon (CPO), with operations spanning Wilmington, US and Tel Aviv. Its AppSec remediation agent uses large language models to build an automated patching pipeline that delivers production-ready security patches across multiple programming languages, claiming to remediate more than 95% of critical and high-severity open-source vulnerabilities without forcing disruptive version upgrades. This decouples patching from breaking dependency changes, letting teams fix vulnerable components in place and dramatically increase patching capacity. In July 2025 Seal raised a $13M Series A led by Vertex Ventures Israel, with More Investments, SBI Holdings, and CCL Industries participating.
Seal Security
ActiveAI-powered remediation agent for open-source vulnerabilities
Total raised
$13M
1 round
Stage
Series A
Team
11-50
since 2021
Pricing
Freemium
free plan
Founded
2021
Wilmington, United States
Agent-ready
API
Score 55/100
LLM-powered automated patch generation
Production-ready patches without version upgrades
Remediates 95%+ of critical/high open-source CVEs
Multi-language patch coverage
In-place fixes that avoid breaking changes
Standalone patches decoupled from upstream releases
Pipeline integration for continuous remediation
Reduces backlog of unpatched dependencies
55/100
Developing
MCP server
Public API
Webhooks
OAuth 2.0
SDKs
— Series A $13M incl. CCL Industries +3
Capital network
$13M raised ·4 backers·4 network links
- Backers4
- Shared portfoliocompanies these backers also fund
- Extended networkfunds that co-invest alongside them
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- What does Seal Security do?
- It uses LLMs to auto-generate production-ready patches for open-source vulnerabilities.
- Why is patching without upgrades useful?
- It lets teams fix CVEs without disruptive version bumps that break dependencies.
- Who founded Seal Security?
- Itamar Sher, Lev Pachmanov, and Alon Navon, former Unit 8200 members, in 2021.
- How much did Seal raise?
- A $13M Series A in July 2025 led by Vertex Ventures Israel.
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