Comparison
prismor vs fast-llm-security-guardrails
Verdict
Pick prismor if prismor is a runtime firewall that safeguards AI frameworks against security breaches like prompt injection attacks and secret leaks. It supports Claude Code and Codex; pick fast-llm-security-guardrails if fast-llm-security-guardrails, also known as ZenGuard, is designed for the rapid deployment of security measures into AI agent systems to ensure they operate within defined trust constraints.
Markdown twin · prismor alternatives · fast-llm-security-guardrails alternatives
GraphCanon updated Sep 20, 2026
6views this month
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Trust & integrity
| Signal | prismor | fast-llm-security-guardrails |
|---|---|---|
| Maintenance | Very active (0d since push) As of Sep 11, 2026 · github_public_v1 | Slowing (222d since push) As of Sep 14, 2026 · github_public_v1 |
| Provenance | Not a fork · Organization account As of Sep 11, 2026 · github_public_v1 | Not a fork · Organization account As of Sep 14, 2026 · github_public_v1 |
| OSV dependency advisories | No published findings from this source as of 2026-07-15 As of Jul 15, 2026 · osv@v1 | Published findings As of Jul 15, 2026 · osv@v1 |
| deps.dev advisories | Not queried deps.dev@v1 | Not queried deps.dev@v1 |
| OpenSSF Scorecard | Not queried openssf-scorecard@v1 | Not queried openssf-scorecard@v1 |
Tagline
- prismor
- Runtime firewall for AI agents to prevent rogue tool calls and security breaches
- fast-llm-security-guardrails
- The fastest Trust Layer for AI Agents
Stars
- prismor
- 343
- fast-llm-security-guardrails
- 155
Forks
- prismor
- 35
- fast-llm-security-guardrails
- 21
Open issues
- prismor
- 46
- fast-llm-security-guardrails
- 0
Language
- prismor
- Python
- fast-llm-security-guardrails
- Python
Adopt for
- prismor
- Prismor is a runtime firewall that safeguards AI frameworks against security breaches like prompt injection attacks and secret leaks. It supports Claude Code and Codex.
- fast-llm-security-guardrails
- fast-llm-security-guardrails, also known as ZenGuard, is designed for the rapid deployment of security measures into AI agent systems to ensure they operate within defined trust constraints.
Persona
- prismor
- -
- fast-llm-security-guardrails
- -
Runtime
- prismor
- -
- fast-llm-security-guardrails
- -
License
- prismor
- Apache-2.0, permissive open-source license allowing free use and distribution under certain conditions.
- fast-llm-security-guardrails
- MIT
Last pushed
- prismor
- Sep 11, 2026
- fast-llm-security-guardrails
- Feb 3, 2026
Categories
- prismor
- AI Agents, Evaluation & Observability
- fast-llm-security-guardrails
- AI Agents, Evaluation & Observability
Trust and health
Maintenance
- prismor
- Very active (96%)
- fast-llm-security-guardrails
- Slowing (36%)
Days since push
- prismor
- 0d
- fast-llm-security-guardrails
- 222d
Open issues (now)
- prismor
- 46
- fast-llm-security-guardrails
- 0
Stars delta
- prismor
- +63 (30d)
- fast-llm-security-guardrails
- +1 (30d)
Open issues delta
- prismor
- +34 (30d)
- fast-llm-security-guardrails
- 0 (30d)
OSV dependency advisories
- prismor
- No published findings from this source as of 2026-07-15
- fast-llm-security-guardrails
- Published findings
Full report
- prismor
- Trust report
- fast-llm-security-guardrails
- Trust report
Shared compatibility
- Python · prismor: Python runtime · fast-llm-security-guardrails: Python runtime
Choose prismor if…
- License: prismor is Apache-2.0, fast-llm-security-guardrails is MIT.
- Pricing: Free with a commercial license for advanced features..
- Requirements: Min 1 GB RAM.
- Tags unique to prismor: agent-security, llm-security, prompt-injection, security-tools.
- When you need a dedicated firewall for AI tools to block unauthorized calls.
When NOT to use prismor
- Avoid if you do not use supported frameworks like Claude Code or Codex, as it might lack coverage.
- Not suitable if you prioritize open-source contributions over runtime protection.
Choose fast-llm-security-guardrails if…
- License: fast-llm-security-guardrails is MIT, prismor is Apache-2.0.
- Tags unique to fast-llm-security-guardrails: agentic-ai, ai-agent, ai-runtime, cx-agent.
- Fast integration of privacy and security guardrails in environments where real-time evaluation and observability are critical.
When NOT to use fast-llm-security-guardrails
- If your project requires a more customizable solution than what fast-llm-security-guardrails offers in its out-of-the-box configurations.
- For teams that operate without established runtime environments like LangChain or LlamaIndex, as this may necessitate significant adaptation of ZenGuard.
Explore
Sources
Every stat on this page traces to a dated GitHub sync, license file, enrichment field, or trust scan.
- GitHub stars (PrismorSec/prismor) · observed Sep 20, 2026
- GitHub forks (PrismorSec/prismor) · observed Sep 20, 2026
- Last push (PrismorSec/prismor) · observed Sep 11, 2026
- License file (Apache-2.0) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 17, 2026
- Trust scan (lockfile / OSV) · observed Jul 15, 2026
- GitHub stars (ZenGuard-AI/fast-llm-security-guardrails) · observed Sep 20, 2026
- GitHub forks (ZenGuard-AI/fast-llm-security-guardrails) · observed Sep 20, 2026
- Last push (ZenGuard-AI/fast-llm-security-guardrails) · observed Feb 3, 2026
- License file (MIT) · observed Sep 20, 2026
- Decision facts (enrichment) · observed Jul 16, 2026
- Trust scan (lockfile / OSV) · observed Jul 15, 2026
GitHub stars on cards: prismor 343 · fast-llm-security-guardrails 155 (synced Sep 20, 2026).
Common questions
- What is the difference between prismor and fast-llm-security-guardrails?
- prismor: Runtime firewall for AI agents to prevent rogue tool calls and security breaches. fast-llm-security-guardrails: The fastest Trust Layer for AI Agents. See the comparison table for live GitHub stats and shared categories.
- When should I choose prismor over fast-llm-security-guardrails?
- Choose prismor over fast-llm-security-guardrails when License: prismor is Apache-2.0, fast-llm-security-guardrails is MIT; Pricing: Free with a commercial license for advanced features.; Requirements: Min 1 GB RAM; Tags unique to prismor: agent-security, llm-security, prompt-injection, security-tools; When you need a dedicated firewall for AI tools to block unauthorized calls.
- When should I choose fast-llm-security-guardrails over prismor?
- Choose fast-llm-security-guardrails over prismor when License: fast-llm-security-guardrails is MIT, prismor is Apache-2.0; Tags unique to fast-llm-security-guardrails: agentic-ai, ai-agent, ai-runtime, cx-agent; Fast integration of privacy and security guardrails in environments where real-time evaluation and observability are critical.
- When should I avoid prismor?
- Avoid if you do not use supported frameworks like Claude Code or Codex, as it might lack coverage. Not suitable if you prioritize open-source contributions over runtime protection.
- When should I avoid fast-llm-security-guardrails?
- If your project requires a more customizable solution than what fast-llm-security-guardrails offers in its out-of-the-box configurations. For teams that operate without established runtime environments like LangChain or LlamaIndex, as this may necessitate significant adaptation of ZenGuard.
- Is prismor or fast-llm-security-guardrails more popular on GitHub?
- prismor has more GitHub stars (343 vs 155). Stars measure visibility, not whether either tool fits your constraints.
- Are prismor and fast-llm-security-guardrails open source?
- Yes - both are open-source projects on GitHub (prismor: Apache-2.0, fast-llm-security-guardrails: MIT).
- Where can I find alternatives to prismor or fast-llm-security-guardrails?
- GraphCanon lists graph-backed alternatives at prismor alternatives and fast-llm-security-guardrails alternatives (prismor markdown twin, fast-llm-security-guardrails markdown twin), ranked by typed relationship edges rather than popularity votes.
- Is there a machine-readable version of this comparison?
- Yes. The markdown twin at this comparison mirrors this page for agents and LLM crawlers, with the same stats table and FAQ answers.
- Which is better maintained, prismor or fast-llm-security-guardrails?
- prismor: Very active. fast-llm-security-guardrails: Slowing. Compare maintenance labels, days since push, and release cadence in the trust section below - stars alone do not measure maintenance.
- Where are the full trust reports for prismor and fast-llm-security-guardrails?
- GraphCanon publishes per-repo trust reports with dated maintenance, provenance, and scan summaries: prismor trust report; fast-llm-security-guardrails trust report.