Heirloom vs Undo
Heirloom vs Undo, compared side by side on 15 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: Heirloom is on 45/100 and Undo on 49/100.
Where each one leads
Heirloom
- agent readiness: 42/100 against 26/100
- domain rating: 68/100 against 2/100
- funding raised: $162M against $49.0M
Undo
- our overall score: 49/100 against 45/100
At a glance
| Measure | Heirloom | Undo |
|---|---|---|
| What it is | Direct air capture startup using limestone to remove CO2 from the atmosphere at scale. | Carbon removal services using enhanced rock weathering to combat climate change. |
| Category | Climate Tech, Carbon Removal, Direct Air Capture, Cleantech | Climate Tech, Carbon Removal, Enhanced Rock Weathering, Sustainability |
| Sells toBusiness model | B2B | B2B |
| Offering | Hardware | Services |
| Founded | 2020 | 2020 |
| Headquarters | Brisbane, United States | London, United Kingdom |
| Status | Active | Active |
Size, funding and growth
| Measure | Heirloom | Undo |
|---|---|---|
| Employees | 100 | Not published |
| Total funding | $162M | $49.0M |
| Latest round | Series B | Funding Round |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Heirloom | Undo |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 45/100 | 49/100 |
| Traction | 60/100 | 38/100 |
| Team | Not published | 70/100 |
| Search visibility | 12/100 | 17/100 |
| Quality | 55/100 | 58/100 |
| Agent readinessHow well an AI agent can read and act on the site | D (42/100) | F (26/100) |
| Domain ratingLink authority, 0-100 | 68/100 | 2/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Heirloom | Undo |
|---|---|---|
| Hosting | Not detected | Self Managed |
| CDN | Cloudflare | Not detected |
| CMS | Webflow | Not detected |
Heirloom vs Undo: common questions
Which is better, Heirloom or Undo?
On our 0-100 score Undo 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 15 data points above: read the rows that match what you are buying for.
How do Heirloom and Undo compare on the numbers?
Heirloom leads on agent readiness (42/100 against 26/100), domain rating (68/100 against 2/100), funding raised ($162M against $49.0M). Undo leads on our overall score (49/100 against 45/100).
Read the full Heirloom review and pricing or the Undo review and pricing. You can also browse other Heirloom alternatives we track.