Kastra vs Push Security
Side-by-side comparison of features, pricing, and ratings
At a glance
| Dimension | Kastra | Push Security |
|---|---|---|
| Primary Focus | Runtime authorization for AI coding agents | Browser-based attack detection and AI tool governance |
| Key Detection/Enforcement | Shell commands, file edits, API calls, browser actions; blocks before execution | AiTM phishing, ClickFix, session hijacking, malicious OAuth, data leakage to AI tools |
| Integration Targets | Claude Code, Cursor, Codex CLI, OpenClaw, Datadog, Splunk, S3 | Okta, Azure AD, Google Workspace, Slack, Teams, Sentinel, Datadog, Splunk |
| Deployment | macOS GUI + CLI; cloud control plane (US, EU, AP); self-hosted/air-gapped available | Cloud-based; browser extension across Chrome, Edge, Firefox, Safari, etc. |
| Best For | Dev teams using AI coding agents who need guardrails against destructive commands | Security/identity teams securing browser-based attacks and shadow AI usage |
| Pricing | Freemium (free local Edge governance; cloud plans require subscription) | Freemium (details not specified beyond free tier) |
Push Security and Kastra solve different problems: Push protects against browser-level attacks and shadow AI tool use across all browsers, while Kastra prevents AI coding agents from executing dangerous actions in real time. If your priority is defending users from AiTM phishing, malicious OAuth, and data leakage to AI sites, go with Push Security. If you need runtime guardrails for Claude Code, Cursor, or similar agents to stop destructive commands, choose Kastra.
Runtime authorization for AI agents — allow, deny, redact, or hold every action before it executes
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Push Security delivers browser security for the AI era — stopping AiTM, ClickFix and consent phishing while governing shadow AI
Visit WebsiteWhat real users say: Kastra 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.
Kastra
75 mentions across 5 sources · 35% positive — critical (averaged across 5 sources)
Hacker News, YouTube, Product Hunt, Bluesky, Lemmy
What users praise
- • Proactive runtime enforcement instead of reactive monitoring.
- • Cross-framework support for Claude, Cursor, Codex, and OpenClaw.
- • Policy-based permissions that don't rely on agent's judgment.
- • Real-time approval workflows for risky operations.
What frustrates them
- • No public evidence against red-teamed or adversarial agents.
- • Unclear how nested tool calls are policed downstream.
- • Community feedback limited to launch platforms only.
- • No long-term reliability or performance data available.
Researched Jul 23, 2026
Push Security
30 mentions across 3 sources · 34% positive — critical (weighted across 3 sources)
Hacker News, YouTube, Lemmy
What users praise
- • Interaction-level detection catches ClickFix, OAuth consent phishing and pastes that URL-reputation tools miss
- • Explicit AiTM, BitB and BitM reverse-proxy coverage addresses the phishing class that beats MFA
- • Shadow-AI discovery and policy enforcement is a genuinely differentiated control for 2025-era risk
- • No endpoint agent, no network appliance — deployment is extension-based and fast
What frustrates them
- • Nearly no independent community reviews — Reddit, Product Hunt and GitHub data is essentially absent
- • Browser-extension-only coverage leaves non-browser auth paths and mobile-first flows unmonitored
- • Blocking at the paste/upload/consent level risks interrupting legitimate workflows and generating tickets
- • Autonomous threat-hunting agents risk adding noise to already-overloaded SOC alert queues
Researched Oct 7, 2026
Who should pick which
- Security team combatting phishing and shadow AIPick: Push Security
Push Security detects and blocks AiTM, ClickFix, and session hijacking while providing visibility into AI tool usage and data leakage, all without requiring a proprietary browser.
- Developer using Claude Code or CursorPick: Kastra
Kastra intercepts agent actions in real time, enforcing policies on shell, file, and network operations without slowing workflows, and provides signed audit trails for compliance.
- Platform team governing AI agent usagePick: Kastra
Kastra's Policy Decision Point and approval workflows allow centralized control over agent actions across a team, with streaming to SIEM for audit.
- Identity team hardening MFA adoptionPick: Push Security
Push Security's in-browser MFA registration guardrails and password change protection help enforce identity policies and detect ghost logins.
- Compliance officer requiring agent traceabilityPick: Kastra
Kastra's ed25519-signed append-only audit trail ensures tamper-proof logs of all agent actions, meeting rigorous compliance requirements.
Frequently Asked Questions
Kastra vs Push Security: which should you choose?
Push Security and Kastra solve different problems: Push protects against browser-level attacks and shadow AI tool use across all browsers, while Kastra prevents AI coding agents from executing dangerous actions in real time. If your priority is defending users from AiTM phishing, malicious OAuth, and data leakage to AI sites, go with Push Security. If you need runtime guardrails for Claude Code, Cursor, or similar agents to stop destructive commands, choose Kastra.
Can Push Security work alongside an existing EDR or browser?
Yes, Push Security is designed to complement EDR by providing browser-specific telemetry that EDRs may miss, and works across all major browsers including Chrome, Edge, Firefox, Safari, Brave, Opera, Arc, and enterprise browsers like Island.
Does Kastra support AI agents other than Claude Code and Cursor?
Currently Kastra supports Claude Code, Cursor, Codex CLI, and OpenClaw. Support for other agents like Copilot or Gemini may require custom SDK integration.
Is Push Security's detection fully automated?
Push Security uses autonomous agents that hunt with browser telemetry in real time, writing detection rules and deploying blocks without analyst intervention.
Can Kastra be used for non-coding AI agents?
Kastra intercepts actions across shell, file, network, database, and browser contexts, so it could apply to any agent that performs those actions, but it is primarily designed for coding agents as listed.
What deployment options does Kastra offer for air-gapped environments?
Kastra provides self-hosted and air-gapped deployment options in addition to its cloud control plane with US, EU, and AP regions.
Does Push Security offer mobile phishing detection?
Yes, Push Security detects mobile phishing via SMS and QR codes as part of its browser-based protection.
Can Kastra block a command before it executes?
Yes, Kastra's PDP evaluates each action before execution and can block or require approval for sensitive actions in real time.
How does Push Security handle AI tool data loss prevention?
Push Security provides in-browser DLP for AI tools by controlling clipboard data and file uploads to prevent sensitive data from being sent to LLMs.
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Last reviewed: July 23, 2026