Target Comparison

The Target Comparison page extends the Target Inspector by letting you compare flag evaluations for two different targets side-by-side. This reveals exactly how targeting rules, segments, and rollout percentages treat different users differently.

Accessing Target Comparison

Navigate to Target Comparison in the sidebar.

How It Works

1. Select an environment — Choose the environment to evaluate against
2. Enter Target A details:
   • Target Key — e.g., user-42
   • Attributes — e.g., {"plan": "free", "country": "US"}
3. Enter Target B details:
   • Target Key — e.g., user-99
   • Attributes — e.g., {"plan": "enterprise", "country": "DE"}
4. Click Compare — Both targets are evaluated against all flags, and differences are highlighted

Comparison Table

The table shows one row per flag:

Column	Description
Flag Key	The flag identifier
Target A Value	The value target A would receive
Target A Reason	Why target A received that value
Target B Value	The value target B would receive
Target B Reason	Why target B received that value
Match	Whether both targets receive the same value

Rows where the two targets receive different values are highlighted, making it easy to focus on the interesting differences.

API Equivalent

curl -X POST "https://api.featuresignals.com/v1/projects/$PROJECT_ID/environments/$ENV_ID/compare-entities" \
  -H "Authorization: Bearer $TOKEN" \
  -H "Content-Type: application/json" \
  -d '{
    "entity_a": {
      "key": "user-42",
      "attributes": { "plan": "free", "country": "US" }
    },
    "entity_b": {
      "key": "user-99",
      "attributes": { "plan": "enterprise", "country": "DE" }
    }
  }'

Use Cases

• Permission toggle verification — Confirm that a free user and an enterprise user see the right features
• Segment debugging — Check whether two users in different segments get correctly differentiated targeting
• Rollout consistency — Verify that percentage rollouts treat users with the same key consistently
• Regional targeting — Confirm that geography-based rules apply correctly for users in different countries
• Customer escalation — "Why does user A see this but user B doesn't?" Answer definitively

Permissions

Requires owner, admin, or developer role to compare targets.