Plumb
C

CBD Product Testing & Rankings

Leafreport

Hands-on tester Free to read Visit Leafreport ↗

Leafreport claims lab-verified CBD rankings, which if genuine would be valuable, but its own homepage confirms advertising/commercial relationships with reviewed brands, and methodology pages were unreachable, leaving a meaningful gap between the watchdog positioning and verifiable independence.

What it's really for Helps consumers identify accurately-labeled, contaminant-free CBD products through lab-verified rankings; also drives affiliate revenue from featured brands.

What our grade covers The grade on this page is about CBD oils, gummies, capsules, topicals, vapes, and pet products from consumer brands, not everything the site does.

Medium Scoring Confidence Mostly sourced, but a detail or two still needs a primary source, so the grade could shift slightly.

Follow the money

Leafreport's homepage footer links to an "Advertising Disclosure" page, indicating the site earns money from brands it covers. If highly-ranked brands also pay affiliate commissions, rankings could favor paying partners over non-paying brands regardless of lab results.

Source →
Operating since
2019 (7 years) · source
What it costs you
Free to read The reviews are free to read.
How they make money
Earns affiliate commissions from CBD brands featured in rankings; also references advertising relationships per its own footer disclosure link.
What they do
Publishes CBD brand and product rankings, claiming to use a proprietary rating mechanism. Positioned as a CBD watchdog that purchases products and sends them to third-party accredited labs, then publishes results to grade potency accuracy, label claims, and contaminant levels.
What to watch for
Methodology specifics are not surfaced on the homepage and dedicated methodology/about pages were unreachable during research. The homepage references an "Advertising Disclosure" confirming commercial ties exist, but the disclosure page itself returned 404, so the exact nature and scope of those ties cannot be independently verified from the live site.
Composite score
2.40 / 5.00 → grade C

How the grade was reached

Independence · 30% weight 2 / 5

Does the site take money from the very entities it ranks? Pay-for-placement, vendor-funded data, and affiliate commissions all pull this down. The less the ranking can be bought, the higher the score.

Evidence basis · 30% weight 3 / 5

What is the ranking actually built on? Hands-on testing scores highest, then verified first-hand reviews, then opinion or popularity surveys and self-reported figures, then pay-to-rank, which scores lowest.

Method transparency · 20% weight 2 / 5

Is the methodology published, specific, and reproducible? Can a reader see how a given rank was reached, or is it a black box?

Conflict disclosure · 10% weight 2 / 5

Are commercial relationships, sponsorships, and affiliate arrangements disclosed clearly and near the rankings themselves, rather than buried?

Manipulation resistance · 10% weight 3 / 5

How hard is it to game? Controls against fake reviews, solicited reviews, and vendor gaming raise this; an open box anyone can stuff lowers it.

Evidence

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