Carbon Clean vs Heirloom
Carbon Clean vs Heirloom, compared side by side on 17 data points: what each one does, how big it is, what it has raised, the tech running each site, and what users report. We score both out of 100 on traction, team and visibility: Carbon Clean is on 49/100 and Heirloom on 45/100.
Where each one leads
Carbon Clean
- our overall score: 49/100 against 45/100
- headcount: 170 against 100
Heirloom
- domain rating: 68/100 against 56/100
At a glance
| Measure | Carbon Clean | Heirloom |
|---|---|---|
| What it is | Industrial carbon capture technology company offering modular CycloneCC systems that retrofit onto existing industrial emitters. | Direct air capture startup using limestone to remove CO2 from the atmosphere at scale. |
| Category | Climate Tech, Carbon Capture, Industrial Decarbonization, Carbon Removal | Climate Tech, Carbon Removal, Direct Air Capture, Cleantech |
| Sells toBusiness model | B2B | B2B |
| Offering | Hardware | Hardware |
| Founded | 2009 | 2020 |
| Headquarters | London, United Kingdom | Brisbane, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | Carbon Clean | Heirloom |
|---|---|---|
| Employees | 170 | 100 |
| Total funding | $195M | $162M |
| Latest round | Series C | Series B |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Carbon Clean | Heirloom |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 49/100 | 45/100 |
| Traction | 60/100 | 60/100 |
| Search visibility | 16/100 | 12/100 |
| Quality | 62/100 | 55/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (45/100) | D (42/100) |
| Domain ratingLink authority, 0-100 | 56/100 | 68/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Carbon Clean | Heirloom |
|---|---|---|
| Hosting | AWS | Not detected |
| CDN | Cloudflare | Cloudflare |
| CMS | Not detected | Webflow |
| Frameworks | Tailwind CSS | Not detected |
| Analytics | Google Tag Manager, Microsoft Clarity | Not detected |
| Support stack | HubSpot | Not detected |
Carbon Clean vs Heirloom: common questions
Which is better, Carbon Clean or Heirloom?
On our 0-100 score Carbon Clean rates higher (49/100 against 45/100). The score weights traction, team, visibility and profile completeness, so it reflects company strength rather than which product suits you. We compare the two on 17 data points above: read the rows that match what you are buying for.
How do Carbon Clean and Heirloom compare on the numbers?
Carbon Clean leads on our overall score (49/100 against 45/100), headcount (170 against 100). Heirloom leads on domain rating (68/100 against 56/100).
Read the full Carbon Clean review and pricing or the Heirloom review and pricing. You can also browse other Carbon Clean alternatives we track.