Corporate clean-energy claims are moving from annual arithmetic to hourly proof. As 24/7 carbon-free energy commitments spread from Google outward and granular certificate standards mature, a software layer has emerged to track every megawatt-hour from generator to consumer — hour by hour, certificate by certificate. This guide compares the platforms, data layers, and registries that make hourly clean-energy accounting work, on identical criteria.
Energy provenance & reporting: Cleartrace — auditable energy and carbon records for buyers and suppliers.
Supplier-side certificate ops: Granular Energy — hourly certificate portfolios for utilities and retailers.
Grid carbon data layer: Electricity Maps — signals from €4,500/yr with a free trial.
Marginal-emissions signals: WattTime — the nonprofit behind emissions-optimized dispatch.
The registry rail: M-RETS, I-TRACK & EnergyTag-aligned systems.
Scope: software and data for tracking, matching, and reporting clean electricity — hourly (24/7) CFE platforms, energy-attribute-certificate operations, grid carbon-intensity data, and the registry infrastructure beneath them. PPA transaction and pricing platforms are covered in our PPA guide; this one is about proving what was bought and when. Six entries, identical criteria; order follows the value chain, not rank.
Criteria: who the platform serves (buyer, supplier, registry), granularity and standards alignment (EnergyTag, RE100, GHG Protocol debates), data sources, licensing, geographic coverage, and the main tradeoff. Pricing is mostly enterprise quote-based; public figures are cited where they exist (checked September 19, 2026).
At a Glance
| Platform | Pricing | Best For | Link |
|---|---|---|---|
| FlexiDAO | Enterprise subscription (quote-based) | Corporate 24/7 CFE tracking & matching | flexidao.com → |
| Cleartrace | Enterprise subscription (quote-based) | Auditable energy & carbon provenance | cleartrace.io → |
| Granular Energy | Enterprise subscription (quote-based) | Hourly certificates for suppliers | granular-energy.com → |
| Electricity Maps | Public price list — signals €4,500–6,000/yr | Grid carbon-intensity data & API | electricitymaps.com → |
| WattTime | Nonprofit; free and licensed access | Marginal emissions signals | watttime.org → |
| M-RETS / I-TRACK bodies | Registry fees (published per registry) | The certificate system of record | mrets.org → |
Pricing checked September 19, 2026. Most platforms in this category sell quote-based enterprise plans; where we cite figures they come from vendor pages or published third-party comparisons and are order-of-magnitude indications, not offers. Billing basis (per user, per MW, per site) varies by vendor — confirm current terms directly before budgeting.
The Platforms in Detail
FlexiDAO
The 24/7 program engine
Best for: corporates and their energy suppliers running hourly carbon-free-energy programs that must survive audits and press releases alike.
| Who it serves | Large clean-energy buyers and the utilities serving them |
| What it does | Hourly matching of consumption against contracted CFE, portfolio analytics, granular-certificate workflows |
| Standards posture | EnergyTag-aligned; built around the 24/7 CFE methodology Google popularized |
| Licensing | Enterprise subscription; quote-based. Checked September 19, 2026 |
| Traction signal | Backed by Google and Microsoft; platform behind Google’s expanding hourly matching and Microsoft–Eneco pilots |
| Main tradeoff | Built for ambitious programs — annual-matching buyers won’t use most of it |
- Proof by construction: when the world’s most scrutinized CFE programs run their hourly matching here, the audit-readiness argument largely makes itself.
- Supplier-and-buyer architecture matches how 24/7 deals actually work — both sides of the contract see the same hourly truth.
- Investor lineage (Google, Microsoft) doubles as a standards bet: the buyers defining hourly accounting are financially committed to its success.
Cleartrace
The provenance ledger
Best for: buyers, suppliers, and real-estate portfolios that need defensible, auditable records of where their power came from — hour by hour.
| Who it serves | Corporates, building portfolios, utilities and traders |
| What it does | Continuous energy and carbon accounting; traceable records linking generation to consumption for reporting and assurance |
| Standards posture | Founding voice in the 24/7 CFE Compact ecosystem; assurance-oriented design |
| Licensing | Enterprise subscription; quote-based. Checked September 19, 2026 |
| Traction signal | Flagship deployments in demanding urban portfolios and energy suppliers |
| Main tradeoff | Provenance and reporting depth over procurement-decision tooling |
- Audit-first design — records built to hand to an assurance provider — matches where corporate energy claims are heading under tightening scrutiny.
- Building-portfolio strength gives real estate an hourly story: tenant ESG reporting backed by data rather than utility-bill folklore.
- Supplier deployments mean the same ledger can serve both sides of a clean-power contract — fewer reconciliation fights.
Granular Energy
The supplier’s certificate desk
Best for: utilities and energy retailers turning hourly certificates from a compliance chore into sellable clean-power products.
| Who it serves | Electricity suppliers, utilities, and certificate portfolio managers |
| What it does | Hourly certificate portfolio management — allocation, matching, product construction — on EnergyTag lines |
| Standards posture | Founded from inside the EnergyTag movement; granularity is the product, not a feature |
| Licensing | Enterprise SaaS; quote-based. Checked September 19, 2026 |
| Traction signal | Working with European suppliers building hourly-matched retail offers |
| Main tradeoff | Supplier-side depth — corporate buyers arrive here indirectly, through their utility |
- Attacks the supply-side bottleneck: 24/7 products cannot scale until suppliers can manage certificates hourly, and that is precisely the workbench built here.
- Portfolio-level allocation logic — which customer gets which hour’s green attributes — is the unglamorous machinery every hourly retail offer depends on.
- European supplier focus positions it where granular-certificate regulation and market design are moving fastest.
Electricity Maps
The carbon data layer
Best for: anyone whose product, report, or optimization needs to know how clean the grid is — anywhere, right now, or historically.
| Who it serves | Developers, corporates, researchers, and the CFE platforms themselves |
| What it does | Carbon intensity, CFE share, mix and flow signals for 130+ zones via API and app |
| Standards posture | A de facto reference dataset across the hourly-accounting ecosystem |
| Licensing | Public price list — per-signal subscriptions from €4,500–6,000/yr per zone family, bundles €12,000–18,000/yr; 14-day free API trial; startup discounts. Checked September 19, 2026 |
| Traction signal | Used by hourly-tracking platforms (FlexiDAO case-studied) and countless products |
| Main tradeoff | A data layer, not an accounting platform — certificates and claims live elsewhere |
- Published pricing in a quote-based category is a genuine gift — teams can budget a carbon-data integration without a sales cycle.
- Zone coverage plus consistent methodology makes it the pragmatic backbone for any multi-country carbon-aware feature.
- The free trial and app double as the industry’s shared mental model of grid carbon — useful long before procurement.
WattTime
The marginal-signal conscience
Best for: operators and buyers who want emissions impact — not just attribution — steering when and where clean electrons act.
| Who it serves | Device fleets, corporates, researchers, policy advocates |
| What it does | Marginal operating emissions rate signals — what emissions an extra kWh causes or avoids, by hour and place |
| Standards posture | The emissionality camp in the accounting debate; a founding force behind avoided-emissions optimization |
| Licensing | Nonprofit — free access tiers and licensed commercial use. Checked September 19, 2026 |
| Traction signal | Signals embedded in consumer devices and corporate load-shifting programs |
| Main tradeoff | Marginal signals answer impact questions, not certificate-compliance ones |
- The intellectual counterweight of the category: attribution says whose electron it was; marginal signals say what your action changed — both questions matter, and mature programs track both.
- Automated emissions-aware charging and load-shifting — the practical fruit of marginal data — ships in real products at consumer scale.
- Nonprofit governance keeps the methodology argument on science rather than sales — and the entry price at zero.
M-RETS & the registry layer
The system of record
Best for: everyone above — because every claim ultimately settles on a registry-issued, retired certificate.
| Who it serves | Generators, suppliers, buyers, and the platforms in this guide |
| What it does | Issues, tracks, and retires energy attribute certificates; M-RETS among the first with hourly-capable infrastructure |
| Standards posture | I-TRACK Foundation instruments and EnergyTag-aligned pilots define the direction of travel |
| Licensing | Published registry fee schedules per system. Checked September 19, 2026 |
| Traction signal | Hourly-certificate pilots increasingly run on registry rails rather than around them |
| Main tradeoff | Infrastructure, not analytics — the platforms above exist to make registries usable |
- No registry retirement, no claim — whatever the dashboard says. Understanding the rail beneath your platform is basic diligence in this category.
- M-RETS’s early hourly capability made North America a live laboratory for granular certificates rather than a whitepaper venue.
- Registry fee schedules are public — a rare fixed point for budgeting in an otherwise quote-based stack.
The Accounting War Behind the Software
This category is software built on an unresolved argument. One camp — behind 24/7 CFE — holds that clean-energy claims should match consumption hourly and locally; another argues marginal emissions impact should govern; the GHG Protocol’s Scope 2 revision process is the battlefield where these positions meet. Every platform here embodies a position: FlexiDAO, Granular, and the registries operationalize hourly attribution; WattTime arms the emissionality case; Cleartrace and Electricity Maps supply evidence to both.
For buyers, the strategic read is simple: granularity is directionally winning — standards bodies, marquee corporates, and registry infrastructure are all moving toward hourly — but timelines are political. Software chosen now should make claims that survive either outcome: hourly-capable data foundations, registry-anchored certificates, and reporting flexible enough to restate under whatever Scope 2 becomes.
Sequencing a Credible Program
Start with data, not commitments: Electricity Maps-grade zone signals plus your own metered load reveal what your actual hourly CFE share is — the number most organizations discover is far below their annual-matched claims. That gap defines the program: which hours, which grids, what mix of new contracts, storage, and load flexibility closes it at least cost.
Platforms then operationalize: FlexiDAO- or Cleartrace-class tracking for the buyer’s ledger, supplier-side certificate operations (Granular-class) as contracts get sophisticated, WattTime signals where load can actually move, and registry retirement anchoring every public claim. The discipline that separates credible programs from vulnerable ones is unglamorous: never let the marketing claim run ahead of the retired certificate.
Kurums Match: Which One Fits You?
Pick the statement that sounds most like your situation.
We’re a corporate buyer moving beyond annual renewable matching.
Baseline your true hourly CFE share first — grid signals plus your meter data — then bring in FlexiDAO- or Cleartrace-class tracking as contracts follow. The baseline usually reshapes procurement more than any dashboard will.
We’re a utility or retailer wanting to sell hourly-matched products.
Granular-class certificate operations are the enabling machinery, on registry rails that support granularity (M-RETS-style). Your differentiation is portfolio allocation logic — which customers get scarce clean hours — so own that design, not just the tool.
We need carbon data inside our own product or optimization.
Electricity Maps’ published-price API for attribution signals, WattTime for marginal-impact signals — and be explicit about which question each feature answers. Mixing the two silently is this category’s classic credibility bug.
We mostly need this year’s claims to survive an audit.
Registry-anchored certificates plus a provenance ledger (Cleartrace-class) cover today’s bar; choose them hourly-capable so tightening standards are a configuration change, not a re-procurement.
Frequently Asked Questions
Is 24/7 CFE actually required by any standard today?
Not yet as a general requirement — annual matching still satisfies RE100 and current Scope 2 guidance. But the GHG Protocol revision debate, EnergyTag’s granular-certificate standard, and marquee corporate programs are pulling disclosure expectations hourly. Buying hourly-capable now is insurance, not compliance.
Hourly matching or marginal emissions — which is right?
They answer different questions: matching proves attribution (whose clean energy you used); marginal signals estimate impact (what your actions changed). Credible programs increasingly report attribution and steer flexible load by impact — the platforms here split along exactly that line.
How does this relate to buying PPAs?
PPA platforms (see our PPA guide) decide what to buy and at what price; this category proves what you bought, hour by hour, and turns it into claims. The sophisticated loop feeds hourly-gap analysis back into procurement — buying the hours you lack rather than more of the ones you have.
Does any of this apply outside Europe and North America?
Increasingly. I-TRACK-family registries extend certificate infrastructure across much of the world, and global zone-level carbon data (Electricity Maps-class) covers most grids. Granular-certificate liquidity, however, remains concentrated where the platforms above operate — expect pioneer friction elsewhere.
Related Comparisons & Guides
- PPA price benchmark platforms compared
- Renewable energy forecasting & weather data compared
- Renewable asset management software compared
- Germany’s renewable incentives & EEG
- UK renewable incentives & CfDs
Last updated: September 19, 2026 · Reviewed by the Kurums Startup editorial team.
Disclosure: Kurums currently has no affiliate, sponsorship, or partnership relationship with any product compared on this page. If that changes, this page will say so here and affected links will carry sponsored attributes.
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