Quick Read
Speeki Guardian® provides independent third-party assurance across the full spectrum of sustainability reporting and claims—from regulatory disclosures and sustainability reports to green finance instruments and ESG rating submissions—protecting organisations against greenwashing allegations, regulatory penalties and loss of stakeholder trust. As regulators mandate disclosure and investors condition capital on verified ESG data, unverified sustainability information has become a material liability, making credible assurance a source of competitive advantage rather than a compliance burden. The service covers sustainability reports under GRI, CSRD/ESRS and IFRS S standards, standalone sustainability claims, green finance reporting, climate commitments, ESG rating submissions and crisis response, delivering assurance opinions aligned with ISSA 5000 and AA1000AS v3.
Use case
How independent sustainability assurance protects your reputation, satisfies regulators and unlocks capital
Sustainability reporting is no longer voluntary. Regulators are mandating disclosure. Investors are conditioning capital on verified ESG data. Customers and supply chain partners are scrutinising environmental and social claims. In this environment, unverified sustainability information is a liability – it exposes organisations to greenwashing allegations, regulatory penalties and loss of stakeholder trust.
Speeki Guardian® provides independent third-party assurance across the full spectrum of sustainability reporting and claims – from regulatory disclosures and sustainability reports to green finance instruments, climate commitments, ESG rating submissions and crisis response. One assurance partner covering everything your stakeholders need to trust.
Why this matters
The cost of getting sustainability reporting wrong is rising fast. CSRD is making assurance mandatory across the EU. Green claims legislation is creating enforcement risk for unsubstantiated environmental statements. Investors are discounting organisations that cannot provide verified ESG data. Rating agencies are penalising inconsistent or incomplete submissions.
Organisations that treat sustainability assurance as an afterthought face regulatory fines, investor scepticism, reputational damage from greenwashing allegations and restricted access to sustainability-linked finance. Those that invest in credible, independent assurance turn reporting from a compliance burden into a source of competitive advantage.
What Speeki Guardian® covers
Speeki Guardian® is designed to assure everything your organisation publishes, submits or claims about sustainability – not just the annual report. This includes six core areas:
Sustainability reports and regulatory disclosures
Speeki provides independent assurance of sustainability reports prepared under GRI, CSRD/ESRS, IFRS S1 and S2, SEC climate disclosure requirements, UK sustainability reporting mandates and other applicable frameworks. We examine data accuracy, completeness, materiality determination, stakeholder engagement and internal controls over sustainability data, delivering assurance opinions aligned with ISSA 5000 and AA1000AS v3.
Sustainability statements and claims
Speeki verifies standalone sustainability claims published on websites, in marketing materials, on product packaging, in investor presentations and in corporate responsibility statements. As green claims legislation increases regulatory scrutiny of sustainability marketing, independent verification provides the substantiation evidence organisations need to publish with confidence.
Green finance and sustainable investment reporting
Speeki assures sustainability reporting linked to green bonds, sustainability bonds, sustainability-linked loans, transition bonds and ESG funds. We verifyallocation of proceeds, achievement of sustainability performance targets, impact reporting and compliance with frameworks including ICMA Green Bond Principles, LMA Green Loan Principles and the Climate Bonds Standard.
Carbon neutrality and climate claims
Speeki verifies carbon neutrality, net zero and climate positive claims. We examine GHG inventory completeness, offset quality and additionality, alignment with science-based pathways and substantiation of climate-related marketing statements – providing legal defensibility as regulatory scrutiny of environmental claims intensifies.
ESG rating and rankings data
Speeki verifies ESG data and qualitative responses submitted to rating agencies, sustainability indices and award programmes – including MSCI, Sustainalytics, CDP and ISS ESG. Accurate, verified submissions protect against avoidable rating downgrades and strengthen access to capital and procurement opportunities.
Crisis response and disclosure remediation
Speeki provides rapid-response verification when sustainability disclosures are challenged through greenwashing allegations, regulatory investigations, media scrutiny or activist campaigns. We investigate disputed claims, verify corrected disclosures and provide independent assurance opinions that support remediation and rebuild stakeholder trust.
What working with Speeki looks like
We work alongside organisations across all six areas, providing a single assurance relationship that scales with your reporting obligations and stakeholder expectations.
Understand your assurance gaps
Speeki conducts a comprehensive review of your sustainability reporting landscape – identifying which reports, disclosures, claims and submissions are currently assured, which are exposed and where the greatest regulatory and reputational risks lie. You get a clear prioritisation of where independent assurance will deliver the most value.
Build internal capability
Speeki helps your teams understand what good sustainability reporting looks like – from data collection and internal controls to materiality assessment and framework alignment. Organisations with stronger internal processes produce higher-quality reports and move through assurance more efficiently.
Get independently assured
Speeki delivers assurance engagements that meet the most demanding professional standards – ISSA 5000, AA1000AS v3, ISQM 1 and the IESBA Code of Ethics. Assurance opinions are designed to satisfy regulators, investors and stakeholders with credible, defensible evidence of reporting quality.
See the bigger picture
Every Speeki assurance engagement includes Assurance Intelligence™ – year-to-year trend analysis showing how your sustainability reporting is maturing, scenario modelling to support strategic planning, and anonymised benchmarking against peer organisations. This means you can see where you stand, where you’re heading and how you compare – turning assurance from a compliance exercise into a source of competitive insight.
What you gain
Organisations that work with Speeki on sustainability assurance typically see:
reduced regulatory risk as mandatory assurance requirements take effect across jurisdictions
stronger investor confidence through independently verified ESG data
legal defensibility against greenwashing allegations and enforcement actions
improved access to sustainability-linked finance through credible, verified reporting
higher ESG ratings through accurate, consistent submissions to rating agencies
faster, more efficient assurance cycles that improve each year as internal processes mature
competitive benchmarking and trend intelligence that informs sustainability strategy.
Organisations that complete assurance engagements receive independent assurance opinions – credible, professionally issued evidence that their sustainability reporting meets the standards their stakeholders require.
About Speeki
Speeki is an independent assurance company helping organisations worldwide turn their compliance, sustainability and ESG initiatives into a competitive advantage. We combine subject-matter expertise, structured audit methodologies and Assurance Intelligence™ to deliver assurance engagements that support long-term governance maturity.
Ready to make your sustainability reporting credible and defensible?
Contact Speeki to discuss how Speeki Guardian® can protect your reputation, satisfy your regulators and strengthen stakeholder trust across every sustainability claim your organisation makes.