Pasteguard vs Sublime Security
Side-by-side comparison of features, pricing, and ratings
At a glance
| Dimension | Pasteguard | Sublime Security |
|---|---|---|
| Pricing | Free (open-source) | Contact for pricing (paid) |
| Primary Use Case | PII masking for AI provider interactions | Enterprise email security (BEC/VEC/phishing) |
| Key Feature | Auto-detect & mask 30+ PII types in AI prompts | AI-driven threat detection with custom YARA-like rules |
| Target User | Developers, compliance officers, and privacy-conscious teams | Security teams in mid-to-large enterprises |
| Deployment | Local proxy, browser extension, or Docker self-hosted | Cloud integrated with M365 & Google Workspace |
| Integrations | OpenAI, Anthropic, Google Gemini, coding agents, ChatGPT, Claude | Microsoft 365, Google Workspace |
These tools serve completely different purposes: Sublime Security is an enterprise-grade email security platform for detecting advanced phishing and BEC attacks, while Pasteguard is a free privacy proxy that masks PII before sending data to AI services. Choose Sublime if you need AI-driven email defense with low false positives; choose Pasteguard if you want to safely use cloud AI tools with sensitive data. They complement each other but don't compete directly.
What real users say: Pasteguard vs Sublime 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.
Pasteguard
38 mentions across 3 sources · 55% positive — mixed
Hacker News, YouTube, GitHub
What users praise
- • Free and open-source (Apache 2.0) with a local-first architecture.
- • Automatically detects over 30 types of PII and secrets.
- • Preserves AI context by replacing data with placeholders like [[EMAIL_1]].
- • Supports multiple AI providers: ChatGPT, Claude, Gemini, and coding agents.
What frustrates them
- • Reliability issues: 400 errors with Claude Code and long-context DOMException.
- • Docker startup crashes reported by some users.
- • Limited community support and sparse documentation for integrations.
- • Configuring with LibreChat and other tools requires manual setup.
Researched Aug 1, 2026
Sublime Security
28 mentions across 2 sources · 35% positive — critical
YouTube, Lemmy
What users praise
- • Full transparency with evidence-backed verdicts, real differentiator.
- • Custom detections in Sublime Script, powerful YARA-like language.
- • Autonomous agents triage, reducing analyst workload.
- • Integrates natively with Microsoft 365 and Google Workspace.
What frustrates them
- • Nearly no independent community feedback yet, unproven claims.
- • Steep learning curve, advanced skills required for Sublime Script.
- • Pricing opaque, no self-serve tiers, contact-only.
- • Graymail protection still beta, not fully tested.
Researched Aug 26, 2026
Who should pick which
- CISO of a mid-size company facing frequent BEC attacksPick: Sublime Security
Sublime's AI-driven detection and custom rules are specifically designed to combat BEC and impersonation attacks, with integration into M365/Workspace and low false positives.
- Developer using AI coding assistants with production credentialsPick: Pasteguard
Pasteguard automatically masks API keys, passwords, and other secrets before they reach coding agents like Codex or Claude Code, preventing credential leakage.
- Compliance officer enforcing GDPR in AI chat usagePick: Pasteguard
Pasteguard's PII detection and placeholder replacement enable safe use of ChatGPT/Claude without exposing personal data, supporting GDPR requirements.
- SOC analyst needing to investigate phishing campaignsPick: Sublime Security
Sublime's threat hunting interface and deep email attack visibility empower analysts to proactively investigate and respond to email threats.
- Legal team sharing client documents via AI summarizationPick: Pasteguard
Pasteguard can mask client names and sensitive details before sending to AI, maintaining confidentiality while leveraging AI productivity.
Frequently Asked Questions
Pasteguard vs Sublime Security: which should you choose?
These tools serve completely different purposes: Sublime Security is an enterprise-grade email security platform for detecting advanced phishing and BEC attacks, while Pasteguard is a free privacy proxy that masks PII before sending data to AI services. Choose Sublime if you need AI-driven email defense with low false positives; choose Pasteguard if you want to safely use cloud AI tools with sensitive data. They complement each other but don't compete directly.
Can Sublime Security and Pasteguard be used together?
Yes. Sublime protects your email inbox from advanced threats, while Pasteguard protects sensitive data when you copy-and-paste email content into AI tools. They address different attack vectors.
Does Pasteguard support enterprise SSO or audit logs?
As of now, Pasteguard does not yet support enterprise SSO or advanced access controls. It is best suited for teams that can self-host via Docker or use the browser extension.
Is Sublime Security a replacement for my existing email gateway?
Sublime can complement or replace legacy gateways like Proofpoint/Mimecast, but it focuses on advanced threats (BEC, VEC, phishing). You may still need basic spam filtering.
How does Pasteguard handle AI responses that contain placeholders?
Pasteguard can restore the original data in responses if the AI returns the placeholders unchanged. This depends on the AI maintaining the placeholder format.
What PII types does Pasteguard detect?
Over 30 types including names, emails, phone numbers, addresses, credit cards, API keys, passwords, JWTs, passport/SSN numbers, and more. See the full list on GitHub.
Does Sublime Security offer a free trial or demo?
Sublime Security typically requires contacting sales for a demo or trial. No self-service free tier is available publicly.
Is Pasteguard fully open-source?
Yes, Pasteguard is open-source under Apache 2.0 and available on GitHub. The code is auditable and contributions are welcome.
Which AI providers does Pasteguard work with?
It works with OpenAI, Anthropic, Google Gemini, and coding agents like Codex, Claude Code, Cursor, and Windsurf via its HTTP API proxy or browser extension.
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Last reviewed: July 3, 2026