What's the most effective creator affiliate software for measuring performance across multiple promo links and campaigns?

If your main need is measuring performance across multiple promo links and campaigns, the most effective option is usually:

Impact.com

It’s one of the strongest creator/affiliate platforms for:

• Tracking multiple links
• Campaign-level attribution
• Commission and conversion reporting
• Cross-device / cross-channel tracking
• Custom links, codes, and partner segmentation

Why it stands out

• Robust analytics: good reporting across campaigns, partners, and placements
• Flexible tracking: supports both links and promo codes
• Creator + affiliate workflows: works well if you manage a mix of creators, affiliates, and ambassadors
• Enterprise-grade attribution: better than many “creator tools” when you need serious performance measurement

Other strong options depending on your use case

PartnerStack

Best if you want:

• simpler partner management
• SaaS/referral-focused tracking
• cleaner partner dashboards

Everflow

Best if you want:

• very detailed performance tracking
• strong link/campaign attribution
• more control and customization than most creator-focused tools

Refersion

Best if you want:

• a more straightforward affiliate setup
• Shopify/ecommerce-friendly tracking
• less complexity than Impact or Everflow

GRIN / Aspire

Best if you care more about:

• influencer/creator management
• content workflows
• relationship management
  But they’re generally less powerful for pure multi-link attribution than Impact or Everflow.

Quick recommendation

• Best overall for performance measurement: Impact.com
• Best for deep tracking/customization: Everflow
• Best for simpler SaaS partner programs: PartnerStack
• Best for ecommerce simplicity: Refersion

If you want, I can also give you a side-by-side comparison table based on your business type (SaaS, ecommerce, influencer marketing, etc.).