6 Best Watershed Alternatives Compared

Carbon accounting is now more important than ever. Businesses of all scales should be thinking about it, but from small-medium sized companies and up, it shouldn’t be a question.

The question is to find the correct software for your business, to make the process the most manageable, effective, straightforward and beneficial for your company goals beyond environmental cooperation.

It’s not just about compliance, though a very real and pressing factor. It’s about optimising your business operations, cutting ineffectiveness, slashing budgets, and immensely strengthening customer trust and stakeholder confidence within your brand.

To make this easier for you, we’ve compared Watershed, a solid software option, with many of the others dominating the market today.

What Is Watershed?

Watershed is a comprehensive carbon management platform with a focus on real-time data processing, user-friendly tools, and industry-specific emissions factors.

Pros and Cons of Watershed

Pros

The platform delivers high data accuracy with an extensive library of over 500,000 emission factors.
With Life Cycle Assessment capabilities at product level, users can drill into specific emissions based on goods for sale.
They provide extensive support for enterprise compliance with frameworks like SEC disclosures and the Science-Based Targets initiative.

Cons

Their enterprise-grade pricing may be out of reach for smaller businesses.
No free demo is available, meaning users must commit before seeing the platform.

Why Companies Might Want a Watershed Alternative

Watershed can be a great fit for large-scale operational businesses, but not everyone.

For instance, smaller or mid-market companies may find its enterprise-grade pricing out of reach from the outset. Moreover, companies wanting to trial a platform before committing may look elsewhere, as Watershed doesn’t offer a free demo.

With many UK businesses needing SECR and DEFRA compliance from day one, companies might seek software with these built in as standard, rather than a globally-focused platform where UK reporting isn’t the default.

What to Look for in a Watershed Alternative

The right alternative depends on your company’s scale, budget, and reporting requirements. Smaller and mid-sized businesses in particular should prioritise transparent pricing and a free trial or demo before committing.

How We Chose the Best Watershed Alternatives

To compile our list, we conducted thorough analysis into a wide range of leading carbon accounting platforms. Differing largely in terms of quality, interface, pricing, and scope, we’ve selected the strongest options available in 2026.

The Top 6 Watershed Alternatives Compared

1. Gaia

Gaia is a UK-built, London-based AI carbon accounting software covering Scope 1, 2 and 3. Built around the UK frameworks, with SECR and DEFRA/DESNZ as standard, they cover CSRD, GHG Protocol and B Corp to accommodate a wide variety of businesses wanting to lower emissions and achieve net zero targets.

Key Features

G.AI document extraction, drag and drop CSVs, PDFs, Excel, auto-extracts data

Automated SECR report generation at click of a button

Anomaly detection across millions of data points

Carbon Reduction Plan included in Pro tier

Natural Capital Marketplace, with over £1.4bn in verified carbon credits

Scope 3 data completion tool, filling gaps using AI to up to 80% accuracy

Integrations with ERPs and accounting software

Pros

No setup costs, no hidden fees, one annual licence

Easy to use, built by UX/UI experts

DEFRA/DESNZ factors built in as standard

Free trial available

Cons

Gaia doesn’t offer a free plan, with prices competitively starting at £300/month.

As a newer platform geared for the latest carbon policies, their smaller customer base is less established than global competitors.

Gaia vs Watershed

Gaia and Watershed sit at opposite ends of the market. Gaia is built for UK businesses from the ground up, with SECR and DEFRA/DESNZ as standard, while Watershed is built for global operational giants with product-level Life Cycle Assessment needs.

Watershed’s pricing and lack of a free demo make it a harder platform to trial, whereas Gaia offers a free trial and transparent pricing from £300/month.

If you need product-level LCA across a vast global supply chain, Watershed’s scale is hard to beat. If you want UK-native compliance and a platform you can get running within a week, Gaia is the better fit.

Best For

At Gaia, our carbon accounting software is a great fit for a variety of businesses, with frameworks from SECR and DEFRA to CSRD and ESRS covering UK compliance through to international reporting. We’re affordable, accessible, and produce detailed reports in a click, making us ideal for startups all the way to enterprises.

2. Persefoni

Persefoni is a carbon accounting platform that automates GHG calculations and disclosures. Robust analytics and reporting capabilities allow users to make data-driven decisions across Scope 1, 2, and 3 emissions.

Key Features

Footprint Ledger, transaction-level carbon accounting modelled like a financial ledger

Persefoni Copilot, AI chat assistant giving on-demand carbon accounting expertise

Full audit trail, logs every data change and calculation down to the source

Financed emissions module, measures portfolio-level emissions for banks and investors

Multi-framework reporting, auto-generates disclosures for ISSB/TCFD, CDP, CSRD, SECR and SB 253/261

Pros

Uniquely, Persefoni offers a free tier for entry-level carbon accounting.

Cons

Requires a steep learning curve, meaning it’s not particularly intuitive for beginners.

The initial setup and data preparation process can be demanding, consuming significant time and resources.

Persefoni vs Watershed

Both targeting huge companies, Watershed is for operational businesses whereas Persefoni is for financial institutions.

Best For

Persefoni is best for asset managers, large enterprises and financial institutions.

3. Greenly

Greenly is a French carbon accounting startup, founded in 2019.

Measuring emissions across all scopes, the platform targets mid-market businesses and SMEs, with plans beginning around £3,000/year and climbing to £9,000 for the premium tier.

Particularly popular across France and Europe, Greenly is accessible and supports CSRD, SBTi, and CDP.

Key Features

Their AI anomaly detection spots statistical errors early on to prevent time-consuming reworks down the line.

Greenly’s supplier engagement tools can dispatch automated data requests to countless suppliers at once, reducing admin and tackling one of the hardest areas to measure in carbon accounting.

The platform’s emission factor library spans more than 300,000 entries, with tens of thousands of monetary and supplier-specific measures. As a result, outputs are built from more dependable data, and reports are more credible.

Pros

Greenly is a well-rounded platform with a polished interface capable of over 100 integrations from Xero to Workiva.

Designed for non-experts, it features a fast onboarding process to gauge a carbon footprint with speed.

Cons

Some users report needing significant internal checks in order to validate data outputs.

With ADEME and CSRD at its core, Greenly is a European-first platform, with UK compliance treated as secondary.

At entry-level price tiers, Scope 3 automation can be limited, meaning users may need to expand their budget for a complete picture of their carbon footprint.

Greenly vs Watershed

While Greenly is more accommodating towards SME and mid-market businesses, Watershed is purely for enterprise companies.

Watershed is priced significantly higher for its enterprise demographic. You might find Greenly too lightweight and Watershed too heavy, in which case Gaia could be the perfect middleground for you.

Best For

Greenly is best for SMEs and mid-market companies, starting from around £3,000 a year. It welcomes non-experts, designed with business users in mind, not full-on sustainability specialists.

Its quick setup is best for SMEs that may not have in-house experts, with automated data collection reducing manual entry.

4. Sweep

Sweep stands out for larger organisations, with a particularly strong capability in managing Scope 3 emissions.

Key Features

Broad framework coverage covering CSRD, SFDR, PCAF, GRI, and GHG Protocol

Ranked a leader in the IDC Vendor Marketscape 2025

AI scenario modelling visualises different reduction pathways

Collaboration tools

Pros

Sweep’s unique cross-collaboration tools make it a productive platform for varied teams.

AI scenario modelling allows for different carbon reduction routes to be visualised and assessed, ensuring the path to net zero is the most efficient.

Where other software might leave gaps, Sweep offers CSRD compliance from start to finish.

Cons

There are limited free options and it sits at a higher price point as it positions itself as an enterprise-grade solution.

Sweep vs Watershed

Sweep is also for larger enterprises from L’Oreal to Lacoste, with Watershed again adopting a more US-heavy, bigger company focus.

Sweep is built for cross-functional collaboration, assigning emission ownership accordingly, whereas Watershed dives into hundreds of thousands of emission factors and product-level LCAs.

Best For

Sweep is best for companies under CSRD requirements, with complex supply chains, financial institutions, and larger enterprises.

5. Plan A

Founded in 2017 and headquartered in Berlin, Plan A is a proactive platform built for forward-thinking companies, prioritising emission reduction over mere measurement.

Key Features

With scenario modelling, companies can map out various routes towards decarbonisation and pursue the most effective path.

Their AI-enhanced data collection streamlines processes for greater efficiency.

Aligned with GHG Protocol, Plan A covers Scope 1, 2 and 3 for comprehensive emission management.

Pros

Calculations are certified independently by TÜV Rheinland.

Trusted by major brands like BMW, N26 and Trivago.

Personalised expert guidance.

Cons

SECR isn’t supported, making it a poor fit for businesses requiring UK compliance.

Without an API, technical integrations are restricted.

Plan A vs Watershed

Plan A targets a mix of larger enterprises and mid-size companies whose ultimate priority is decarbonisation, those like BMW or Trivago. Watershed targets much larger enterprises like Visa and Airbnb.

While Plan A is more action-oriented and decarbonisation-focused, Watershed is both at broader scope and at a more granular level.

Best For

This software is best for European mid to large businesses, such as existing customers BMW or Trivago. If you just want a quick carbon report to check the box and stay minimally compliant, other options may be simpler and quicker.

If you want a dedicated accountant actively curating your roadmap for reduction, Plan A is an option for you.

6. Normative

Normative is a Stockholm-based company founded in 2014, one of the original platforms for carbon accounting and early to the market.

Key Features

Their science-based carbon calculation engine draws on 349,000+ emission factors from over 20 scientific databases.

An AI assistant provides automatic customer service without waiting for human service.

Users can invest in carbon credit projects directly from the platform.

Pros

Boasting a 100% SBTi approval rate and a 100% audit success rate, their platform links to climate strategy experts.

They are independently verified by TÜV SÜD, a German independent testing and certification body.

Cons

With a narrow focus on carbon, Normative falls short if you were looking to gauge a wider ESG focus of your company.

Setup can include significant amounts of manual data entry.

Normative vs Watershed

While Normative is for mid-to-large enterprises with independently validated Scope 3 data, Watershed spans wider to 5 of the top 6 US banks or even larger players like Spotify and Visa.

Normative is a carbon-only view, whereas Watershed tracks water and land too. Both involve much heavier manual data entry than platforms like Gaia.

Best For

Best for larger enterprises with large supply chains across the globe, where expert guidance and science-backed frameworks make comprehensive emissions measurable.

Which Watershed Alternative Is Right for Your Business?

Persefoni suits asset managers and financial institutions. Greenly suits SMEs and mid-market businesses after a fast, accessible setup.

Sweep suits enterprises needing cross-functional Scope 3 collaboration, Plan A suits those prioritising proactive decarbonisation over pure measurement, and Normative fits enterprises prioritising scientific rigour over a global supply chain.

Watershed still suits the largest operational enterprises. For UK businesses or those wanting a faster, more affordable route to audit-ready carbon accounting, Gaia is worth exploring first.