MCP Defender vs Push Security
Side-by-side comparison of features, pricing, and ratings
At a glance
| Dimension | MCP Defender | Push Security |
|---|---|---|
| Primary Focus | Desktop firewall for MCP traffic (prompt injection, credential theft) | Browser security (AiTM, session hijacking, AI data leakage) |
| Deployment | Desktop proxy app (local) | Cloud-based browser extension (multi-browser) |
| Target User | Developers using AI coding assistants | Security/identity teams in organizations |
| Key Integration | Cursor, Claude, VS Code, Windsurf | Okta, Azure AD, Google Workspace, Slack, Splunk, Snowflake |
| Open Source | Yes (AGPL-3.0, acquired by Docker Inc.) | No |
Choose Push Security if you need holistic browser security for your organization — covering AiTM phishing, identity hardening, and AI data leakage across all browsers. Choose MCP Defender if you're a developer or team using AI coding assistants like Cursor and Claude, and need to secure MCP traffic against prompt injection, credential theft, and tool poisoning — without leaving your desktop.
Desktop security proxy that scans every MCP tool call in Cursor, Claude, VS Code, and Windsurf in real time.
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Push Security is browser security for the AI era — it stops AiTM phishing, ClickFix attacks, session hijacking and shadow AI inside the
Visit WebsiteWhat real users say: MCP Defender vs Push Security
Not marketing copy and not our opinion — a structured sweep of public discussion (reviews, forums, communities and video comments), showing what people praise and what they complain about for each tool.
MCP Defender
53 mentions across 5 sources · 50% positive — mixed (averaged across 5 sources)
Hacker News, YouTube, Product Hunt, GitHub, Lemmy
What users praise
- • Purpose-built for MCP traffic in AI coding assistants.
- • Real-time proxy intercepts tool calls and responses for analysis.
- • Detects prompt injection, credential theft, and command injection.
- • Dual detection: LLM analysis plus deterministic signature matching.
What frustrates them
- • Default mode sends data to external LLM provider—trust trade-off.
- • Setup can be non-trivial; GitHub issues document configuration failures.
- • Each MCP call is proxied and scanned, potentially adding latency.
- • Free tier caps at 250 transactions—insufficient for regular use.
Researched Jul 29, 2026
Push Security
30 mentions across 3 sources · 51% positive — mixed (weighted across 3 sources)
Hacker News, YouTube, Lemmy
What users praise
- • Browser-extension delivery means no endpoint agent and no forced enterprise-browser migration
- • Cross-browser coverage including Chromebooks and AI/enterprise browsers
- • Published $5/user/month Standard pricing with self-serve trial lowers evaluation friction
- • Detections target modern browser-layer threats: AiTM, ClickFix, BitB, device-code phishing
What frustrates them
- • Essentially no independent user reviews anywhere in the scraped community data
- • Extension-based security is itself a supply-chain risk that HN commenters flag
- • Clipboard, prompt and file-upload monitoring raises privacy and data-residency objections
- • Autonomous agent deployment of blocks may conflict with change-control processes
Researched Oct 14, 2026
Who should pick which
- Enterprise Security TeamPick: Push Security
Push Security provides holistic browser security (AiTM phishing, session hijacking, AI data leakage) with enterprise integrations (Okta, Splunk) and autonomous threat hunting, ideal for protecting a large organization across all browsers.
- Developer Using AI Coding AssistantsPick: MCP Defender
MCP Defender secures MCP traffic in Cursor, Claude, VS Code, and Windsurf against prompt injection, credential theft, and tool poisoning with a desktop firewall — essential for dev workflows.
- Identity Team Hardening MFA/SSOPick: Push Security
Push Security offers in-browser MFA registration and password change guardrails, plus ghost login detection, directly addressing identity protection for unmanaged identities.
- Startup with Limited BudgetPick: MCP Defender
MCP Defender's free Starter plan covers up to 250 transactions and is open-source, making it affordable for small teams needing basic MCP threat protection.
- Organization Securing AI Tool UsagePick: Push Security
Push Security provides real-time AI tool visibility, usage control, and in-browser DLP for AI tools (clipboard, file uploads) to prevent data leakage to LLMs, as per its feature set.
Frequently Asked Questions
MCP Defender vs Push Security: which should you choose?
Choose Push Security if you need holistic browser security for your organization — covering AiTM phishing, identity hardening, and AI data leakage across all browsers. Choose MCP Defender if you're a developer or team using AI coding assistants like Cursor and Claude, and need to secure MCP traffic against prompt injection, credential theft, and tool poisoning — without leaving your desktop.
What types of attacks does Push Security protect against?
Push Security protects against AiTM phishing, ClickFix/ConsentFix attacks, session hijacking, malicious OAuth integrations, ghost logins, credential theft, compromised tokens, and malicious browser extensions.
What types of attacks does MCP Defender protect against?
MCP Defender protects against prompt injection, credential theft (e.g., SSH keys), command injection, and tool poisoning in MCP traffic.
Is MCP Defender open source?
Yes, MCP Defender is open-source under AGPL-3.0 and was recently acquired by Docker Inc.
Does Push Security work with any browser?
Yes, Push Security works across all major browsers as a browser extension, without requiring migration to a single enterprise browser.
What integrations do these tools support?
Push Security integrates with Okta, Azure AD, Google Workspace, Slack, Splunk, and Snowflake. MCP Defender integrates with Cursor, Claude, Visual Studio Code, and Windsurf.
Can I use MCP Defender in a cloud environment?
No, MCP Defender is desktop-only, running as a proxy between AI apps and MCP servers on your local machine.
Which tool is better for a large enterprise?
Push Security is better suited for large enterprises needing comprehensive browser security, identity hardening, and SIEM integration.
How does the pricing compare?
Push Security is freemium with custom enterprise pricing (likely higher). MCP Defender has a free Starter tier (250 transactions, 2 teams) and a Basic plan at $29/month.
More MCP Defender or Push Security comparisons
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Last reviewed: July 3, 2026