Azure Prompt Shield vs Lakera Guard
Detailed comparison for runtime guardrails
On Guardion's Prompt Attack Risk Benchmark, Lakera Guard is the more secure of the two: Prompt Shield scores NaN% and Guard scores NaN% on F1 score (higher is better).
Head-to-Head Overview
Prompt Shield is the overall winner in this comparison!
Guardrail Metrics
F1 Score
Accuracy
Precision
Recall
False Positive Rate
False Negative Rate
Average Latency (ms)
p50 Latency (ms)
p90 Latency (ms)
Key Highlights
- Azure Prompt Shield has a better F1 Score.
- Azure Prompt Shield has a better Accuracy.
- Azure Prompt Shield has a better Precision.
- Azure Prompt Shield has a better Recall.
- Lakera Guard has a better False Positive Rate.
- Lakera Guard has a better False Negative Rate.
- Lakera Guard has a better Average Latency (ms).
- Lakera Guard has a better p50 Latency (ms).
- Lakera Guard has a better p90 Latency (ms).
Security Profile
Outward is better on every axis.
Frequently asked questions
Is Azure Prompt Shield or Lakera Guard more secure?
On Guardion's Prompt Attack Risk Benchmark, Lakera Guard is the more secure of the two: Prompt Shield scores NaN% and Guard scores NaN% on F1 score (higher is better).
What is the F1 score of Prompt Shield vs Guard?
Prompt Shield scores NaN% F1 and Guard scores NaN% F1 on Guardion's prompt-attack benchmark. F1 balances precision and recall — higher is better.
How were Prompt Shield and Guard tested?
Both were evaluated via API at production-like sensitivity against 30+ prompt-attack categories using zero-shot, Crescendo, and TAP methods, scored by F1.