51 to Carbon Zero
51toCarbonZero is a UK-based climate technology and advisory platform that provides AI-powered carbon accounting, ESG reporting, and transition planning software combined with expert advisory (Climate Unlimited™) to mid-to-large enterprises, with a notable concentration in Media & Advertising.
- Company typePrivate
- Founded2021
- HeadquartersCity Of London, United Kingdom
- Headcount11–50
- GTM typeB2B
- OfferingSoftware
What 51 to Carbon Zero does
51toCarbonZero is a UK-headquartered climate technology and advisory firm founded in 2021, providing enterprise software and expert services for carbon accounting, ESG reporting, and transition planning. The company's customer base is concentrated in mid-to-large organizations across at least 11 verticals, with a documented emphasis on Media & Advertising (logos include Renault, Nielsen, Photobox, Plus500, Havas, Innovid, Magnite, Ogury, Dept, MiQ, Etro, Pubmatic, and Index Exchange). The firm operates from Twemlow, Cheshire with 11–50 employees, serves clients globally across the UK, US, Thailand, and broader Asia Pacific, and holds ISO 27001, SOC 2, and Cyber Essentials certifications.
The core product is an AI-powered climate and ESG management platform combining automated data collection, carbon accounting, transition planning, and ESG reporting. It integrates with 100+ enterprise systems (finance, HR, procurement, AWS, GCP, Azure) via APIs and OCR/AI, adheres to GHG Protocol, CSRD, California SB253/261, UK SRS, TCFD, CDP, and ISSB frameworks, and integrates with the Science Based Targets initiative. Notable modules include Carbon Accounting, Carbon Reduction, Supply Chain Engagement, ESG reporting, CleanCloud (digital emissions), and a Parent-Child architecture purpose-built for multi-entity organizations such as agency holding companies. Bundled with the software is the Climate Unlimited™ advisory service, which provides dedicated Climate Success Managers, ISO lead verifier support, regulatory horizon scanning, materiality assessments, and LCAs.
The revenue model combines a tiered enterprise SaaS subscription (recurring) with professional services revenue from Climate Unlimited™ advisory engagements, delivered through a consultative, demo-driven enterprise field-sales motion. Pricing is quote-based and not publicly disclosed. The company's distribution is direct-only with no channel resale or self-serve model evident. In November 2025, 51toCarbonZero acquired Green Element, a European sustainability consultancy, to deepen its advisory capacity. The company has been recognized in the Sifted 100 UK & Ireland 2026 (#92) and won the 2024 Growing Business Awards B2B Business of the Year – Small.
51 to Carbon Zero firmographics
Firmographics- Name
- 51 to Carbon Zero
- Legal name
- 51 to Carbon Zero
- Website
- https://51tocarbonzero.com
- Company type
- Private
- Founded year
- 2021
- Operating status
- Operating
- Headcount range
- 11–50 employees
- Short description
- 51toCarbonZero is a UK-based climate technology and advisory platform that provides AI-powered carbon accounting, ESG reporting, and transition planning software combined with expert advisory (Climate Unlimited™) to mid-to-large enterprises, with a notable concentration in Media & Advertising.
- Ownership category
- akta.pro rank
51 to Carbon Zero industry classification
Industry- Product category
- Carbon Accounting & ESG Management Software
- NAICS
- Software Publishers (513210), Environmental Consulting Services (541620)
- SIC
- Services-Prepackaged Software (7372), Services-Computer Programming, Data Processing, Etc. (7370)
- akta.pro primary industry
- Enterprise Carbon Accounting & GHG Inventory Platforms (EUABAEAA)
- akta.pro secondary industries
- Net-Zero Target Setting & SBTi/Net-Zero Standard Support (EUABAKAA), Regulatory & Disclosure Strategy (CSRD/ESRS, ISSB/IFRS S2, SEC, TCFD) (EUABAKAH), Net-Zero Assurance & Readiness Assessments (limited assurance prep, audit support) (EUABAKAJ)
Keywords
Where 51 to Carbon Zero is headquartered
LocationHeadquarters
- HQ city
- City Of London
- HQ country
- United Kingdom
- HQ region
- Europe
Offices1 record
Markets served
51 to Carbon Zero business model
Business model- GTM type
- B2B
- Offering type
- Software
- Cost components
- Technology or R&D, Personnel, Marketing or Sales, Operations, Infrastructure
Revenue model
- SaaS Platform Subscription: Enterprise subscription to the AI-powered carbon and ESG management platform, with access to measurement, reduction, supplier engagement, AI features, and ESG reporting modules. Revenue is recurring (subscription-based) with tiered access to features and modules.
- Expert Advisory Services (Climate Unlimited™): Advisory engagements providing expert advice through Climate Success Managers, transition planning, regulatory compliance consulting, and support services bundled with or alongside the platform subscription. Constitutes a professional services revenue component, either bundled or sold as an add-on.
Go-to-market motion2 records
Distribution channels1 record
Marketing channels6 records
51 to Carbon Zero product offering
Product offeringCore offering
51 to Carbon Zero sells an AI-powered enterprise SaaS platform for carbon footprint measurement, carbon reduction planning, supply chain (Scope 3) engagement, and ESG reporting, complemented by an expert advisory service called Climate Unlimited™ delivered by dedicated Climate Success Managers. The platform automates data collection via 100+ integrations and is sold to mid-to-large organizations on a quote-based subscription, with advisory services bundled or sold alongside.
Product overview
51toCarbonZero is a climate technology and advisory platform combining software with expert advisory support. The core Platform enables carbon accounting, ESG reporting, and transition planning through modules including Carbon Accounting, Carbon Reduction, Supply Chain Engagement, and ESG. The CleanCloud feature automates digital emissions tracking for cloud infrastructure. Climate Unlimited™ provides expert advisory with dedicated Climate Success Managers. The platform automates data collection via 100+ integrations and offers industry-specific solutions across 11 sectors including Media & Advertising, Manufacturing, and Food & Beverage.
Differentiator
Problem solved
Functional benefit
Brands
- Climate Unlimited™: Expert advisory service providing support from Climate Success Managers in subjects like climate risk, materiality assessments, LCAs and all aspects of regulation.
- CleanCloud
Products and services
- 51toCarbonZero Platform Enterprise AI-powered climate and ESG management platform enabling carbon footprint measurement, ESG reporting, transition planning, and supply chain engagement. Sold to mid-to-large organizations as a subscription, integrating with 100+ enterprise systems via APIs, OCR, and AI.
- CleanCloud Automated digital emissions measurement product that captures cloud energy usage from AWS, GCP, and Azure, tracks device lifecycles and embedded carbon, and integrates upstream IT services in supplier assessments to provide audit-ready Scope 3 digital carbon data.
- Climate Unlimited™ Expert advisory service providing dedicated Climate Success Managers, scenario planning, ROI modelling, regulatory horizon scanning, materiality assessments, and LCAs to complement the platform and support credible climate programmes.
- Carbon Certification Certification support service providing ISO lead verifier reviews and external disclosure preparation to help clients achieve audit-ready carbon and ESG reporting outcomes.
Quantifiable outcome
- Reduces carbon reporting time by 54%
- +5 more outcomes
Companies that use 51 to Carbon Zero
Customer profileNamed customers15 records
Segments11 records
Ideal customer profiles3 records
51 to Carbon Zero technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- No
- API docs
- API detail
Core technology
AI maturity
App detail
AI capability5 records
Feature8 records
51 to Carbon Zero partnerships and signals
Strategic signalPartnerships
Three partnerships are on record, tiered core.
- Green Elementcore51toCarbonZero integrated Green Element, a European sustainability consultancy, to enhance its emissions management and transition planning offerings. The integration combines Green Element's green advisory services with 51toCarbonZero's AI-driven platform to provide comprehensive climate solutions for organizations. This integration allows clients access to advanced AI-driven tools and expert consultancy for climate risk management and sustainability strategies.
- Green ElementcoreIntegration of Green Element's advisory expertise with the 51toCarbonZero platform to deliver enhanced climate risk management and sustainability advisory services, extending the company's service delivery capabilities beyond pure software.
- 100+ Technology IntegrationscoreThe 51toCarbonZero platform integrates with 100+ finance, HR, procurement, cloud, and other enterprise systems via APIs and OCR/AI connectors, enabling automated data collection and carbon calculations without requiring clients to replace existing systems.
Scale indicators6 records
Recent moves7 records
Expansion highlights5 records
51 to Carbon Zero competitors and assessment
Company assessmentBroad incumbents
- Sphera: Enterprise ESG, EHS, and sustainability software suite covering carbon accounting, supply chain, and compliance. Competes primarily in larger enterprise ESG deployments.
- Workiva: Public ESG and sustainability reporting platform used by large enterprises for CSRD, SEC, and TCFD disclosures. Competes at the ESG reporting layer rather than the carbon measurement core.
- Salesforce Net Zero Cloud: Salesforce's Net Zero Cloud (formerly Salesforce Sustainability Cloud) offers carbon accounting and ESG data management inside the Salesforce ecosystem. A broad incumbent competing for enterprise sustainability budgets.
- ClimatePartner: Germany-based climate solutions provider combining carbon accounting software with offset and climate action advisory. Comparable on the combined software + advisory go-to-market motion.
Direct peers
- Watershed: Enterprise carbon accounting and climate platform offering GHG inventory, reporting, and reduction planning for large organizations. Directly competes with 51toCarbonZero on Scope 1–3 measurement, audit-ready reporting, and AI-driven data automation.
- Persefoni: AI-powered carbon accounting and climate management platform used by enterprises and financial institutions. Competes head-to-head on enterprise carbon accounting, SBTi alignment, and audit-grade reporting.
- Sweep: Carbon accounting and ESG data platform with strong positioning in the agency and media vertical. Competes most directly with 51toCarbonZero's primary Media & Advertising segment and its multi-entity data model.
- Plan A Earth: Berlin-based carbon accounting and decarbonization SaaS for SMBs and enterprises. Comparable in offering carbon accounting, SBTi target setting, and ESG reporting modules.
- Emitwise: Carbon accounting platform focused on manufacturing and supply chain Scope 3 measurement. Directly comparable on supply chain engagement and enterprise carbon footprint automation.
Emerging players
- FigBytes: ESG and sustainability management platform with carbon accounting, target setting, and reporting modules. Comparable product scope to 51toCarbonZero but typically deployed in mid-market and specific verticals.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks5 records
Key highlights7 records
Customer concentration
51 to Carbon Zero social profiles
Digital presence51 to Carbon Zero compliance and trust
Trust signalCompliance3 records
51 to Carbon Zero financial estimates
Financial estimateRevenue estimate
Valuation estimate
51 to Carbon Zero leadership team
Management profileNumber of profiles
Profiles1 record
51 to Carbon Zero subsidiaries and ownership
Company hierarchySubsidiaries1 record
51 to Carbon Zero funding detail
Funding detailFunding overview
Funding rounds2 records
Investors2 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
51 to Carbon Zero M&A and investment
M&A and investmentM&A1 record
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about 51 to Carbon Zero
What does 51 to Carbon Zero do?
51 to Carbon Zero sells an AI-powered enterprise SaaS platform for carbon footprint measurement, carbon reduction planning, supply chain (Scope 3) engagement, and ESG reporting, complemented by an expert advisory service called Climate Unlimited™ delivered by dedicated Climate Success Managers. The platform automates data collection via 100+ integrations and is sold to mid-to-large organizations on a quote-based subscription, with advisory services bundled or sold alongside.
Is 51 to Carbon Zero a public or private company?
51 to Carbon Zero is a private company. It is classified as venture growth investor backed and is currently operating.
When was 51 to Carbon Zero founded?
51 to Carbon Zero was founded in 2021. It employs 11 to 50 people.
Where is 51 to Carbon Zero based?
51 to Carbon Zero is headquartered in City Of London, United Kingdom, in the Europe region.
How does 51 to Carbon Zero make money?
Two revenue lines are on record. SaaS Platform Subscription is the primary driver. The others are expert Advisory Services (Climate Unlimited™).
Who are 51 to Carbon Zero's main competitors?
Broad incumbents on record are Sphera, Workiva, Salesforce Net Zero Cloud and ClimatePartner. Direct peers are Watershed, Persefoni, Sweep, Plan A Earth and Emitwise. FigBytes is listed as an emerging player.
Does 51 to Carbon Zero have an API?
No public API is recorded for 51 to Carbon Zero.
What industry is 51 to Carbon Zero in?
51 to Carbon Zero's product category is Carbon Accounting & ESG Management Software. Its primary akta.pro industry code is EUABAEAA, Enterprise Carbon Accounting & GHG Inventory Platforms, with a secondary code of EUABAKAA, Net-Zero Target Setting & SBTi/Net-Zero Standard Support. Its NAICS code is 513210 and its SIC code is 7372.