Influencer marketing platform Lefty has published new research on the growing importance of authenticity in influencer marketing, revealing that brands must move beyond traditional metrics to find creators who build genuine audience trust and deliver measurable ROI.

Key insights:

• Research published in the Harvard Business Review identifies five recurring factors in influencer marketing authenticity: expertise, connectedness, integrity, originality, and transparency. Audiences are more likely to trust creators who consistently operate within a recognisable niche and maintain a distinct point of view - and tend to prioritise consistency and relatability over formal expertise.
• Research published in the Journal of Marketing found that influencer authenticity is not a fixed trait, but the result of alignment between influencers, brands, agencies, and audiences. Authenticity tends to weaken when brands over-script creator content or prioritise message control over storytelling freedom.
• Traditional metrics - reach, follower counts, and surface-level engagement - are no longer sufficient on their own. Audiences are increasingly responding to creators who demonstrate consistent category relevance, audience responsiveness, transparent sponsorship behaviour, long-term product familiarity, and original storytelling styles.
• Many brands still rely on manual workflows involving spreadsheets, screenshots, disconnected outreach, and inconsistent reporting, making it difficult to compare creators and benchmark long-term performance.
• Modern influencer programmes require systems that enable creator discovery across platforms, audience and performance signal comparison, relationship organisation, campaign outcome tracking, and long-term performance benchmarking.
• Sephora Collection’s partnership with Lefty demonstrates the operational impact: by centralising influencer discovery, campaign tracking, creator qualification, and performance reporting, the brand was able to scale global creator programmes more efficiently while improving ROI visibility and influencer vetting.

For more information, visit lefty.io.

lefty × DIARY directory

Unlock 30M+ influencer profiles with advanced filters and demographic insights.
DIARY directory members receive -15% per year. Request a demo here.