Zilch and B Corp are not direct alternatives.
B Corp Certification assesses the company. Zilch helps suppliers and distributors calculate, manage and share sustainability data about the products they sell.
If a procurement team asks, "How does your company govern its social and environmental impact?", B Corp can provide a recognised answer.
If the same team asks, "What is the carbon footprint of these 5,000 bottles, what are they made from and what supports the recycled-content claim?", it needs product-level evidence.
Many distributors eventually face both questions. This comparison explains where each approach fits, where it stops and when using both makes sense.
The short answer
Choose B Corp when the primary goal is whole-company certification across governance, workers, human rights, climate, environmental stewardship and other impact topics.
Choose Zilch when the primary goal is usable SKU-level sustainability information across a product catalogue, tender, quote, invoice, e-commerce site or customer report.
Use both when customers assess the supplier and the products it sells.
What B Corp covers
B Corp Certification is a broad company-level certification.
B Lab's current standards require eligible companies to meet foundation requirements and performance requirements across seven impact topics:
- Purpose and stakeholder governance
- Climate action
- Justice, equity, diversity and inclusion
- Government affairs and collective action
- Fair work
- Human rights
- Environmental stewardship and circularity
Companies also need to meet the applicable legal requirement and complete verification. The precise requirements vary with factors such as company size, sector and industry.
For a wholesaler or distributor, that can bring structure to questions that otherwise sit in separate policies:
- How does the board consider affected stakeholders?
- How is the climate transition governed?
- Are workers treated fairly?
- How are human-rights risks managed in the supply chain?
- Does purchasing support circularity and environmental stewardship?
- Does the company measure and improve its performance?
B Corp's strength is that it looks across the company. It is meant to change how the business operates, not simply calculate one environmental metric.
What Zilch covers
Zilch is a product-level sustainability and carbon footprint platform for suppliers and distributors.
It helps a business build consistent records across large catalogues, including data such as:
- Product and packaging materials
- Weights and saleable units
- Manufacturing information
- Product carbon footprint
- Freight and other lifecycle assumptions
- Recycled-content evidence
- Certifications
- Sourcing and social evidence
- Buyer-facing reports and disclosures
The data can be used in customer workflows: product pages, catalogues, tenders, quotes, invoices and impact reports.
Zilch's strength is granularity and scale. It connects sustainability information to the SKU a customer is actually considering.
It is not a whole-company certification. It does not assess every subject in the B Corp standards, change a company's constitution or award a B Corp credential.
The most important difference: scope
B Corp's unit of analysis is the business.
Zilch's unit of analysis is the product or catalogue record.
That distinction prevents misleading claims.
Imagine a B Corp certified distributor sells two notebooks:
- Notebook A contains verified 100% post-consumer recycled paper, has a current chain-of-custody claim and a documented cradle-to-gate footprint.
- Notebook B has no confirmed material breakdown and comes from a different factory.
The company's B Corp status applies at company level. It does not make the two notebooks environmentally equivalent.
Conversely, a strong product record for Notebook A does not prove that the distributor pays workers fairly, has stakeholder governance or manages ethics across the company.
Each layer is useful precisely because it does not pretend to prove the other.
How the evidence differs
B Corp evidence
Depending on the requirement, evidence may include:
- Constitutional documents
- Board or governance records
- Policies and procedures
- Worker data
- Greenhouse gas inventories and transition plans
- Human-rights due-diligence records
- Environmental performance data
- Public disclosures
- Improvement plans
The evidence needs to show how the company governs, implements and improves its impact.
Zilch evidence
Product-level evidence may include:
- Bills of materials
- Product and packaging weights
- Manufacturing location
- Supplier data
- Emission factors and calculation assumptions
- Product certifications
- Transaction or chain-of-custody records
- Factory audits
- Evidence issue and expiry dates
The evidence needs to support specific product information and calculations.
Zilch vs B Corp by commercial question
The choice becomes clearer when framed as a customer question.
"Are you a purpose-led, accountable business?"
B Corp is the relevant route. Zilch is not a certification of corporate purpose or stakeholder governance.
"Can you send us a recognised company sustainability credential?"
B Corp may be relevant if the buyer accepts it. EcoVadis or ISO 14001 may also be requested depending on the procurement process.
"What is the footprint of our order?"
Zilch is designed to calculate and aggregate product-level results. B Corp does not provide an order footprint.
"What supports this recycled-content claim?"
Zilch can link product data and evidence. The underlying certification or supplier documentation still needs to be valid. B Corp status alone is not substantiation.
"Can this data go into a tender or product page?"
Zilch is designed around those product outputs. B Corp provides a company credential and public profile, not a complete SKU data feed.
"How do you manage human rights across the business?"
B Corp's human-rights requirements are directly relevant. Zilch can help organise product and factory evidence but does not replace whole-company due diligence.
Cost and effort
The cost structures are different, so a simple price comparison would be misleading.
B Corp involves certification fees plus internal work: gap assessment, governance changes, data collection, policy and process development, verification and ongoing improvement. The material cost is often staff time and organisational change, not just the invoice from B Lab.
Zilch is software and supporting service. The implementation effort centres on product data, catalogue integration, calculation, supplier evidence, approvals and distribution of outputs. Its commercial value tends to grow with catalogue size and the number of customer requests the data can serve.
Ask which recurring work each investment removes or improves:
- Does B Corp strengthen customer trust, recruitment, governance and strategic discipline?
- Does Zilch reduce tender effort, answer product questions, support sales and improve product data coverage?
The benefits do not sit in the same budget line, even if both involve sustainability.
Is Zilch a B Corp alternative?
Not in the literal sense.
Someone searching for a B Corp alternative may mean one of several things:
- A different whole-company credential
- A supplier rating requested by customers
- A narrower environmental management standard
- Faster evidence for a tender
- Product-level proof instead of company-level certification
Zilch only addresses the last two where the need is product data.
If the customer explicitly requires B Corp Certification, Zilch will not satisfy that requirement. If the customer wants evidence about individual products, B Corp will not supply that evidence by itself.
The better question is not "Which badge is better?" It is "What decision does the evidence need to support?"
When B Corp alone may be enough
B Corp may be the priority when:
- The company has a narrow product range with strong existing product data
- Customers mainly assess corporate values and governance
- Employer brand and whole-company purpose are major objectives
- Product footprints are not a current buyer requirement
- The business needs a broad transformation framework
"Enough" still does not mean the certification supports unqualified product claims.
When Zilch alone may be enough
Zilch may be the priority when:
- Buyers request product carbon footprints or sustainability data
- The company manages a large catalogue
- Tender teams repeatedly chase suppliers for evidence
- Product claims are inconsistent
- The business already has suitable company-level systems or credentials
- A B Corp application is not commercially relevant
The company may still need corporate emissions, human-rights and governance programs outside Zilch.
When both make sense
Both make sense when a distributor wants to show that:
- The company has credible governance and performance across social and environmental topics.
- Its product recommendations are supported by specific, current evidence.
The systems can reinforce each other. Product data can improve the metrics behind B Corp climate, human-rights and circularity work. B Corp governance can create the ownership and accountability needed to maintain product data properly.
A practical combined model looks like this:
- B Corp defines company commitments and verifies the broader system.
- Zilch operationalises product-level data across purchasing and sales.
- Supplier certifications and audits support specific underlying claims.
- Customer outputs explain the scope of each credential.
Avoid these claims
Do not say:
- "All our products are B Corp certified."
- "This product is sustainable because we are a B Corp."
- "Zilch certifies our company as sustainable."
- "A carbon footprint proves the product is environmentally friendly."
Do say, where accurate:
- "Our company is a Certified B Corporation."
- "This product record includes a cradle-to-gate carbon footprint calculated on the stated unit and method."
- "The recycled-content claim is supported by the linked supplier and chain-of-custody evidence."
- "Company and product credentials have different scopes."
Specific wording is less exciting than a sweeping claim. It is also far more defensible.
The verdict
B Corp is the stronger choice for whole-company certification and stakeholder governance.
Zilch is the stronger choice for product-level sustainability data at catalogue scale.
For product businesses, the most credible position is often not choosing one and dismissing the other. It is building the right evidence at each level and explaining the difference clearly.
If the missing layer in your business is product data, see how Zilch works for distributors. If the missing layer is whole-company certification, start with B Lab's current requirements.