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CarbonCure vs EC3

Two embodied-carbon resources that sit on opposite sides of a concrete purchase. CarbonCure is a materials technology that concrete producers install to inject captured CO2 into fresh concrete so they can reduce cement. EC3, from the nonprofit Building Transparency, is a free, open-access embodied-carbon calculator and EPD database that designers, contractors and owners use to find, compare and specify lower-carbon materials. Not like-for-like, and neither is AI software. Desk research from vendor pages read Oct 27, 2026; not tested, no winner.

DESK RESEARCH, NOT TESTED. Compiled from vendors' public websites (accessed Oct 27, 2026). Vendor claims are not verified by Means & Methods Lab. No scores or rankings.

In short: CarbonCure (Low-carbon concrete technology; no public prices (quote / sales)) vs EC3 (Building Transparency) (Embodied carbon & EPD database; free option; paid prices not listed). Facts last checked Oct 27, 2026. No winner declared; not tested.

Side by side

CarbonCure vs EC3: vendor-published facts side by side
Sheet rowCarbonCureEC3 (Building Transparency)
CategoryLow-carbon concrete technologyEmbodied carbon & EPD database
AI role (our label)Not AI-firstNot AI-first
What it doesCarbon utilization technology for concrete producers that injects captured CO2 into fresh concrete, allowing cement reductions. The vendor says the CO2 mineralizes and stays embedded, maintaining compressive strength while allowing cement reductions. Also generates and sells carbon credits, sharing revenue with producers. Vendor cites 10M+ truckloads produced across two dozen countries (vendor claim). A materials technology, not AI software. Re-read Oct 18, 2026: the technologies page says a Valve Box connected to an on-site CO2 tank doses the CO2 during mixing, a Control Box syncs with the plant's batching software, and the equipment is retrofitted in one visit; the Ready Mix page says producers reduce cement content by 3-5% on average and save 15-25 lb of CO2 per cubic yard (vendor claims). Re-read Oct 19, 2026: the technologies page adds that Control Box telemetry syncs to a CarbonCure Command Centre for remote support, with a 99% uptime claim, and that producers see system usage in myCarbonCure (vendor statements). Re-checked Oct 20, 2026: technologies page unchanged in substance (CO2 injected during mixing mineralizes into calcium carbonate; Valve Box on the on-site CO2 tank; Control Box integrated with the plant's batching software; one-visit retrofit; Command Centre telemetry and myCarbonCure usage summaries). It adds that in ready mix dry batch plants the CO2 goes into the hopper and in central mix or masonry plants into the central mixer (vendor statements). Re-checked Oct 21, 2026: homepage, technologies and Ready Mix pages unchanged in substance (CO2 injected during mixing forms calcium carbonate; Valve Box on the on-site CO2 tank, Control Box integrated with batching software, one-visit retrofit; Command Centre telemetry and myCarbonCure usage summaries; 3-5% average cement reduction and 15-25 lb of CO2 per cubic yard, vendor claims). The pages now show running counters of CO2 saved and truckloads delivered (vendor figures, not used). Re-read Oct 22, 2026 for a compare: homepage, technologies and Ready Mix pages unchanged in substance (CO2 injected during mixing reacts with calcium ions to form nano-sized calcium carbonate, enhancing cement hydration so producers can reduce cement; Valve Box on the on-site CO2 tank, Control Box integrated with batching software, one-visit retrofit; Command Centre telemetry; carbon credits sold to corporate buyers with revenue shared with producers; installation, testing and ongoing support in its post-launch service model). Counters, cement-reduction and CO2 figures and customer quotes remain vendor material not used. Re-checked Oct 25, 2026: homepage and technologies page unchanged in substance (CO2 injected during mixing mineralizes into calcium carbonate; Valve Box on the on-site CO2 tank and Control Box integrated with batching software, retrofitted in one visit; Command Centre telemetry and myCarbonCure usage summaries; carbon credits sold with revenue shared with producers). Counters and truckload figures are vendor material and are not used. Re-checked Oct 27, 2026 (also read for a compare): homepage, technologies and Ready Mix pages unchanged in substance (CO2 injected during mixing mineralizes and is permanently embedded; Valve Box and Control Box retrofit; Command Centre telemetry; carbon credit revenue shared with producers; 3-5% average cement reduction, vendor claim). Running counters remain vendor figures and are not used.Free, open-access embodied-carbon calculator and EPD database from the nonprofit Building Transparency. EC3 (Embodied Carbon in Construction Calculator) is described as a free and open-access embodied-carbon accounting tool and EPD database for finding and comparing materials, planning project embodied carbon, declaring products, and auditing digital EPDs. The EC3 program page cites 250,000+ valid EPDs hosted and 71,500+ registered users in 84 countries (vendor figures). Also lists tallyLCA, an EC3 API, Open Data for Climate, and EC3 2.0 in development. Integration notes on that page include One Click LCA, Procore, and others. No AI features described on the pages we read. Re-checked Oct 19, 2026: EC3 is still described as the only free and open-access global embodied carbon accounting tool; tallyLCA, EC3 2.0 and the cove.tool, 2050 Materials, One Click LCA and Procore integrations are still listed. The program page's counters did not render in our fetch, so the EPD and user counts above are from earlier reads. A new membership program and API terms are summarized under Pricing. Re-checked Oct 25, 2026: the EC3 page is unchanged in substance (free and open-access embodied carbon accounting tool; find and compare materials, plan project embodied carbon, audit digital EPDs). Its integration list names an Autodesk Construction Cloud app, Bentley iTwin, cove.tool, 2050 Materials, One Click LCA, Procore, the Transparency Catalog and Tangible. The page's counters did not fully render in our fetch and are not used. Re-checked Oct 27, 2026 (also read for a compare): new on the Building Transparency homepage, EC3 2.0 Beta is described as launched at Greenbuild 2026 (Oct 20-22, with a first look at the Autodesk booth), a rebuilt platform the vendor says is faster, with improved data quality and expanded global coverage; users can join the beta. Not used or tested by us. The EC3 program page is otherwise unchanged in substance (same four uses and integration list); its counters did not fully render and are not used.
Who it's forReady-mix and precast concrete producers; designers and owners specifying lower-carbon concrete.Designers, specifiers, contractors, and owners working on embodied carbon.
Pricing (as publicly stated)No public prices found (checked Oct 16, 2026; re-checked Oct 18 and Oct 19, 2026): the vendor site has no pricing or plans link in its navigation or footer, and /pricing and /plans return a not-found page. The site's calls to action include "Contact us". Confirm current pricing with the vendor. Re-checked Oct 20, 2026: unchanged; carboncure.com/pricing still returns a not-found page and there is still no pricing link. Re-checked Oct 21, 2026: unchanged; /pricing still returns a not-found page and the site offers Contact us. Re-checked Oct 22, 2026: unchanged; /pricing still returns a not-found page and the site offers Connect with a CarbonCure Rep. Re-checked Oct 23, 2026: unchanged; /pricing still returns a not-found page and the homepage shows no prices. Re-checked Oct 25, 2026: unchanged; /pricing still returns a not-found page and the site offers Connect with a CarbonCure Rep. Re-checked Oct 27, 2026: unchanged; /pricing still returns a not-found page and the site offers Connect with a CarbonCure Rep.EC3 tool access is described as free and open-access. Re-checked Oct 19, 2026: the tool stays free, and the membership page says no core functionality (EPD repository, Find & Compare Materials, Project Planner) is gated behind membership. Building Transparency now publishes optional annual memberships: Professional $250 and Student $50 per individual; organizational Community Member $1,000 (up to 5 seats, +$250 per extra seat), Practitioner Member $5,000 (up to 10 seats, API at 100 tokens a minute, production and commercial use) and Sustaining Member $10,000 to $25,000, self-selected (unlimited seats and projects, API at 1,000 tokens a minute), with 50% off for government agencies, 501(c)(3)s and international nonprofits. Its API Access & Membership page (no longer blocked) says the free, rate-limited API (4 tokens a minute, 400 an hour, 2,000 a day) is for exploration and testing only, with no commercial use, caching or redistribution, and that since October 2026 higher API limits come through membership rather than separate paid API tiers. Membership never affects EPD content, ranking or visibility (vendor statement). Donations are separate. (Checked Oct 15, 2026; re-checked Oct 19, 2026.) Re-checked Oct 21, 2026: membership dues unchanged ($250 Professional, $50 Student, $1,000 Community with up to 5 seats, $5,000 Practitioner with up to 10 seats, $10,000 to $25,000 Sustaining; +$250 per extra seat; 50% off for government agencies and nonprofits). The membership page now lists Project Planner allowances by tier (5, 10, 20 and 50 projects a year, unlimited for Sustaining) and a White Label EPD Catalogue coming March 2027 for Practitioner and Sustaining. The API page, marked last modified Oct 20, 2026, keeps the free tier at 4 tokens a minute, 400 an hour and 2,000 a day, but its access-level table shows unfilled placeholders for the member rate limits while the membership page lists 100 and 1,000 tokens a minute; we keep the membership page figures. Re-checked Oct 22, 2026: membership dues unchanged ($250 Professional, $50 Student, $1,000 Community with 5 seats, $5,000 Practitioner with 10 seats, $10,000-$25,000 Sustaining, $250 per extra seat); the 50% discount heading now reads nonprofits, government and academia. The API page is still marked last modified Oct 20, 2026, with the free tier at 4 requests per second, 400 per minute and 2,000 per day. Re-checked Oct 23, 2026: membership dues unchanged ($250 Professional, $50 Student, $1,000 Community with up to 5 seats, $5,000 Practitioner with up to 10 seats, $10,000-$25,000 Sustaining self-selected, $250 per extra seat, 50% off for government agencies and nonprofits); core EC3 tools still free for all. The membership FAQ says memberships bill annually and auto-renew for one-year terms with a reminder at least 60 days before renewal, payment is by invoice, credit card or ACH, and membership is non-voting. Re-checked Oct 25, 2026: membership dues unchanged ($250 Professional, $50 Student, $1,000 Community with up to 5 seats, $5,000 Practitioner with up to 10 seats, $10,000-$25,000 Sustaining self-selected, $250 per extra seat, 50% off for government agencies and nonprofits); core EC3 tools still free. The free API tier still reads 4 tokens a minute, 400 an hour and 2,000 a day. The membership page lists Practitioner API limits at 100 tokens a minute and Sustaining at 1,000, while the API page still shows those two values as placeholders to be confirmed. Re-checked Oct 27, 2026: memberships unchanged (Professional $250, Student $50; Community $1,000 up to 5 seats, Practitioner $5,000 up to 10 seats, Sustaining $10,000-$25,000 self-selected; $250 per extra seat); core EC3 tools still free.
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Vendor links
Sources

Facts last checked: Oct 27, 2026. Prices change; check the vendor page before relying on them.

Where the vendor descriptions differ

  • What each is (vendor wording): CarbonCure says its technology injects captured CO2 into fresh concrete, where it mineralizes and becomes permanently embedded, maintaining compressive strength and enabling cement reductions. Building Transparency describes EC3 as a free, easy-to-use tool for finding and comparing building materials based on supply-chain-specific EPD data, planning and comparing a project's embodied carbon, declaring products in EC3's EPD format, and auditing digital EPDs.
  • Who uses it: CarbonCure's equipment is bought by ready-mix, precast and masonry producers; it is retrofitted in one visit (a Valve Box on an on-site CO2 tank and a Control Box synced with the plant's batching software). Its site also addresses designers, builders and owners with lower-carbon specification resources and a producer map. EC3 is used by designers, specifiers, contractors, owners, certification programs and policymakers, and houses material quantities from BIM models, estimates or as-builts.
  • How they meet on a project: the two are complementary rather than alternatives. A contractor or designer might use EC3 to set embodied-carbon targets and compare concrete EPDs, and CarbonCure is one way a producer can lower the carbon of the mixes it supplies. We did not confirm how CarbonCure mixes appear in EC3; check the specific producer's EPDs.
  • Money flows differently: CarbonCure says it sells carbon credits to corporate buyers and shares the revenue with producers, and its Ready Mix page says producers reduce cement content by 3-5% on average (vendor claim). EC3 is run by a nonprofit and says membership never affects EPD content, ranking or visibility.
  • What's new: Building Transparency's homepage (read Oct 27, 2026) says EC3 2.0 Beta launched at Greenbuild 2026, describing a rebuilt platform with improved data quality and expanded global coverage; we have not used the beta. EC3 integrations listed on its program page include an Autodesk Construction Cloud app, Bentley iTwin, cove.tool, 2050 Materials, One Click LCA and Procore.
  • Pricing (checked Oct 27, 2026): CarbonCure publishes no prices; /pricing returns a not-found page and the site offers Connect with a CarbonCure Rep. EC3 tool access is free; optional annual memberships run from $50 (student) and $250 (professional) to $1,000, $5,000 and $10,000-$25,000 for organizations, and add higher API limits (see the tool page).
  • Not used here: CarbonCure's truckload, CO2-saved and credit-revenue counters and customer quotes, and EC3's EPD, user and project counters and case-study reduction figures (vendor content).

Paraphrased from the sources listed above. Vendor claims are reported as claims.

What users say

The facts above come from vendor websites. Whether either tool is any good for your work is something only people who use them can say. These are member reviews, all ratings shown, never edited or removed for being negative.

Used either of these? Share your take

Good or bad, an honest review from an estimator, PM or super helps the next team more than another vendor demo. You post under a handle; your email is never shown.

Questions to ask in your review

  • Whether your concrete suppliers offer CarbonCure mixes and publish product-specific EPDs for them
  • Whether your owner or spec requires EPDs or embodied-carbon limits, and which database or LCA tool they expect you to use
  • What CarbonCure mixes cost compared with your usual mixes; that is set by the producer, not published
  • What did you use it for, on what kind of work and project size?
  • How long did setup and training take, and who on your team did it?
  • What does it cost you in practice, compared with what the sales call said?

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