Top Repello AI Alternatives for 2026
Repello AI focuses on ai red teaming & guardrails. many teams evaluate alternatives for broader agent coverage, different deployment models, or pricing that fits their scale. Here are the top competitors to consider.
Category: AI Red Teaming & Testing • Last reviewed: 2026-07-03
What is Repello AI?
Combines ARTEMIS, an automated red-teaming engine testing AI systems against 15M+ attack patterns in 100+ languages, with ARGUS runtime guardrails that block malicious inputs in under 100ms, plus AI asset inventory and an MCP gateway. Guardrail policies are auto-calibrated from red-team findings.
GuardionAI
Agent runtime governance — EDR for AI agents. Guardion governs every agent command, tool call, and data access inline: a security gateway, runtime guardrails, DLP, and detection & incident response for AI agents.
Why it's better than Repello AI
sub-130ms guardrails latency • 96.3 F1 on the Prompt Security Leaderboard with 0.02% false positives • 50M+ agent actions protected per month
Promptfoo
Developer-friendly CLI tool for testing, evaluating, and red teaming LLM applications.
garak (NVIDIA)
Generative AI Red-teaming & Assessment Kit, now maintained by NVIDIA. Scans LLMs for hallucinations, data leakage, and prompt injection with a comprehensive probe library.
Patronus AI
Automated evaluation and security testing platform for Large Language Models to catch hallucinations and safety issues.
Frequently asked questions
What is Repello AI?
Combines ARTEMIS, an automated red-teaming engine testing AI systems against 15M+ attack patterns in 100+ languages, with ARGUS runtime guardrails that block malicious inputs in under 100ms, plus AI asset inventory and an MCP gateway. Guardrail policies are auto-calibrated from red-team findings. It is categorized under AI Red Teaming & Testing in the Guardion AI Security Index.
How much funding has Repello AI raised?
Repello AI raised a $1M Seed (2025-06), bringing total disclosed funding to $1M.
Is Repello AI open source?
No, Repello AI is a commercial product (Enterprise (free red-team scan available)).
What are the best Repello AI alternatives?
Teams evaluating Repello AI most often compare it with Promptfoo, garak (NVIDIA), Patronus AI, and GuardionAI — all listed under AI Red Teaming & Testing.
How does Repello AI compare to GuardionAI?
Repello AI focuses on ai red teaming & guardrails, while GuardionAI is an agent runtime governance platform ("EDR for AI agents") that governs every agent tool call inline with sub-130ms guardrails latency.
Last reviewed: 2026-07-03
Sources: repello.ai · aarm.dev