First Recon AI Firewall vs LLM Guard: Side-by-Side Comparison (2026)

First Recon AI Firewall: Inline firewall inspecting AI prompts/responses for injections & policy violations. built by First Recon AI. Core capabilities include Prompt injection attack detection, Jailbreak attempt detection, Data exfiltration detection in prompts and agent interactions..

LLM Guard: LLM Guard is a security toolkit that enhances the safety and security of interactions with Large Language Models (LLMs) by providing features like sanitization, harmful language detection, data leakage prevention, and resistance against prompt injection attacks..

Both serve the LLM Guardrails market but differ in approach, feature depth, and target audience.

First Recon AI Firewall is developed by First Recon AI. LLM Guard is open-source with 2,043 GitHub stars. Vendor maturity, funding stage, and team size can be important factors when evaluating long-term viability and support quality.

First Recon AI Firewall and LLM Guard serve similar LLM Guardrails use cases: both are LLM Guardrails tools, both cover Prompt Injection, LLM Security, LLM Guardrails. Key differences: First Recon AI Firewall is Commercial while LLM Guard is Free, LLM Guard is open-source. Review the feature comparison above to determine which fits your requirements.