Scoring

Scoring

NatBench computes a 0–100 score for each server based on four components:

Component	Weight	Metric
Speed	50%	Median latency (ms)
Reliability	30%	Success rate (%)
Consistency	10%	P95 − Median spread
Security	10%	DNSSEC + malware + ad blocking

Speed Score (50 pts)

speed_score = max(0, 50 − median_ms / 4)

A server answering in 0 ms would score 50. At 200 ms it scores 0.

Reliability Score (30 pts)

reliability_score = success_rate * 30

100% success = 30 pts. Any failed query reduces this proportionally.

Consistency Score (10 pts)

spread = p95_ms − median_ms
consistency_score = max(0, 10 − spread / 10)

A tight spread (low jitter) earns full 10 pts. High variance reduces score.

Security Score (10 pts)

Feature	Points
DNSSEC validation	4
Malware blocking	4
Ad blocking	2

DNSSEC is tested by querying a known-bad DNSSEC domain and checking for SERVFAIL.
Malware blocking is tested with a known malicious domain.
Ad blocking is tested with a known ad-network domain.

Score Labels

Range	Label
90–100	Excellent
75–89	Good
50–74	Fair
25–49	Poor
0–24	Bad

Protocol weighting

When using all protocol mode, each protocol run produces its own ServerStats.
Results are merged: the best (lowest median) result per server is shown.