Karst vs Onyx + Blue
An independent side-by-side ethics comparison of Karst and Onyx + Blue across certifications, average sustainability score and product range.
Karst
Higher score93.3/100 avg ethics
3 products tracked
Certifications
Onyx + Blue
82/100 avg ethics
1 products tracked
Certifications
Top Karst products
Revolutionary 'stone paper' notebooks made without water, trees, or bleach, providing a waterproof and tear-resistant writing surface.
A revolutionary tree-free notebook made from repurposed calcium carbonate (stone) instead of wood pulp, using significantly less water and energy in production.
A revolutionary waterproof notebook made entirely from recycled stone waste instead of trees, utilizing zero water or bleach during production.
Top Onyx + Blue products
A 2-pack of black ink pens featuring a barrel made from sustainably harvested bamboo, significantly reducing plastic waste in the office.
Frequently asked: Karst vs Onyx + Blue
Which is more ethical, Karst or Onyx + Blue?+
Karst scores higher on independent ethics scoring: Karst averages 93.3/100 vs Onyx + Blue at 82/100.
Which has more certifications?+
Karst appears with 4 verified certifications (B Corp, Cradle to Cradle, Climate Neutral, 1% for the Planet). Onyx + Blue appears with 2 (FSC Certified, Vegan).
Are these scores independent?+
Yes. Both brands are scored by the same methodology — never paid placement. See our methodology page for the weighting.