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B Corp Certification

We’re a trusted expert in B Corp™ Certification, one of the world’s most rigorous third-party sustainability credentials

As one of the first companies in Australia to certify under B Lab’s new Standards (Version 2 / V2), we want to make it easy for others to follow.

With greenwashing running high, evidencing leadership through credible certification has never been more important. If you’re interested in becoming, or staying a B Corp, we have the knowhow, experience and certification track record you need.

We know, we’ve been doing B Corp since 2013.

Our B Corp Certification Services

We work with existing and aspiring B Corps to prepare for certification under the new B Lab V2 standards. Whether it’s your first time or your fourth, our deep knowledge, proven management tools and 3rd party audit insights streamline your B Corp journey from set-up to certified.

Hover over our client logos to learn more.

B Corp Certification

Just starting your B Corp journey? We’re here to help.

We build your skills and confidence, set you up with clear roadmaps and proven workflows to get you submission and audit-ready.

Light-touch or full-service support, you decide.



Australia’s first V2 cohort→

When the ECGT (‘EmpCo’) Directive came knocking, the world’s biggest travel B Corp turned to us …

B Corp Recertification

Even for seasoned B Corps, V2 is a different beast. Scores are gone, sub-requirements are in and 3rd party audit means the devil’s in the detail.

We’ve already guided early-adopters to successfully recertify under the new standards.

Ready to bridge your gaps and raise the bar? Let’s chat.





Responsible investor steps up→

How do you go from 45 to 87.3 in 60 seconds? Well just a tad longer but here’s a company that did exactly that …

Ongoing Impact Improvement

Under V2, Year 0 is just the start. Get ready for Years 3 and 5 with a tailored continuous improvement strategy that means you’ll be audit-ready. when you need to be.

Let us show you how.


Leading Hand Design nails it→

A design studio with purpose at their heart asked us to hold their hand through their first certification …

Why work with One Stone


Our B Corp story started back in 2013 as co-founders of the UK’s first women-owned certified B Corp.

Today, we continue to play an active role in the global B Corp movement, as a certified B, expert advisor to others, and as B community builders.

Through our B Corp Consulting, we’ve worked with companies of all sizes, from Micro to XXL, across a range of industries from retail, tourism and finance to community care and more. Our insight and longstanding involvement in the B Corp mission using business as a force for good, make us the ideal partner for your B Corp journey.

“An experienced, values-led consultancy driving real sustainability outcomes. Their alignment with the SDGs, dedication to inclusive leadership, and measurable client success mark them as a strong force in sustainability consulting.”

2025 National Banksia Award Judges

We co-founded the UK’s first women-owned & Scotland’s first B Corp


In Australia we’ve since gone on to certify 4 times, growing our impact score from 114.4 in 2019 to 140.1 in 2025—and now leading with the new standards.

We were one of the first companies to certify under the new V2 standards

Spearheading the biggest uplift in the B Corp movement’s 20-year history—with full conformity across impact areas.

We are @ B Council

Andrea is a serving member of the B Council, B Lab’s regional stakeholder governance body bringing the voice of B Corps into decision-making.

We are @ B Local Sydney

As co-lead of B Local Sydney, Alexandra can connect you with a 200+ purpose-driven business network.

We are @ B Corp Consultants

As some of the first Trained B Corp Consultants in AANZ, we bring specialised skills backed up by 30+ years of sustainability expertise to amplify your impact.

Meet our Trained B Corp Consultants

B Lab AANZ’s B Corp Consultants Training Program equips experienced consultants to accompany businesses preparing for B Corp certification, improve their impact and use business as a force for good.

Consultants who successfully complete the program, are up-to-date with continuing professional development, and remain in good standing are endorsed by B Lab AANZ through its online B Corp Consultants Directory.

Our in-house B Corp Consultants Andrea and Alex have been part of the program since 2020 and 2024 respectively.

When you choose us, you’ll be working with skilled consultants who are also deeply engaged members the B Corp Community.


With 30 years at the leading edge of corporate sustainability, Andrea is an expert at strategic integration of ESG and the SDGs for measurable positive impact. One of Australia’s first trained B Consultants, a B Council member and Banksia judge, she brings a wealth of global best practice and stakeholder insight to your leadership journey.

Hello, Kia ora aspiring B! Congratulations on choosing to join an incredible global community of purpose-driven businesses!

In 2026, we’ve helped two of the first five B Corps to recertify under the new standards (V2), so we’ve gained some good hands-on experience with the new requirements and process to help you through yours.

What is B Corp certification?

With over 11,000 certified companies across 160+ industries in more than 100 countries—and counting—B Corp™ is a recognised benchmark of responsible business leadership.

B Lab’s new standards (V2) set minimum performance, transparency and accountability thresholds across foundation requirements plus 7 impact areas, from climate action to human rights. To certify, a company’s environmental, social and governance (ESG) practices must meet all requirements and undergo independent ISO-grade third party audit & verification.

In 2026, we became one of the first trailblazing companies in Australia to certify under these new standards.

We’d love to help you get there too.

Hover over the impact topics to learn more.



Foundation Requirements (FR)



Purpose & Stakeholder Governance (PSG)



Fair Work (FW)



Justice, Equity, Diversity & Inclusion (JEDI)



Human Rights (HR)



Climate Action (CA)



Environmental Stewardship & Circularity (ESC)



Government Affairs & Collective Action (GACA)

Frequently Asked Questions

We are the world’s leading women-owned purpose-driven sustainability firm.

Let’s drive positive change together.