Exergy3 vs H2SITE
Exergy3 vs H2SITE, compared side by side on 18 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: Exergy3 is on 53/100 and H2SITE on 48/100.
Where each one leads
Exergy3
- our overall score: 53/100 against 48/100
H2SITE
- agent readiness: 30/100 against 21/100
- domain rating: 48/100 against 26/100
- funding raised: $50.0M against $25.5M
At a glance
| Measure | Exergy3 | H2SITE |
|---|---|---|
| What it is | Ultra-high temperature thermal energy storage solutions for industrial decarbonisation. | Industrial company in hydrogen production and separation solutions. |
| Category | Cleantech, Energy Storage, Industrial Decarbonisation, Renewable Energy | Cleantech, Energy, Hydrogen, Clean Energy |
| Sells toBusiness model | B2B | B2B |
| Offering | Hardware | Hardware |
| Founded | 2023 | 2017 |
| Headquarters | Edinburgh, United Kingdom | Bilbao, Spain |
| Status | Active | Active |
Size, funding and growth
| Measure | Exergy3 | H2SITE |
|---|---|---|
| Employees | 16 | Not published |
| Total funding | $25.5M | $50.0M |
| Latest round | Seed | Series B |
| LinkedIn followers | 10,981 | Not published |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Exergy3 | H2SITE |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 53/100 | 48/100 |
| Traction | 49/100 | 38/100 |
| Team | 70/100 | Not published |
| Search visibility | 37/100 | 11/100 |
| Quality | 58/100 | 68/100 |
| Agent readinessHow well an AI agent can read and act on the site | F (21/100) | F (30/100) |
| Domain ratingLink authority, 0-100 | 26/100 | 48/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Exergy3 | H2SITE |
|---|---|---|
| CDN | Cloudflare | Not detected |
| CMS | WordPress | WordPress |
| Frameworks | Tailwind CSS | Jquery |
| Analytics | Google Analytics 4 | Google Tag Manager |
| Support stack | Not detected | HubSpot |
Exergy3 vs H2SITE: common questions
Which is better, Exergy3 or H2SITE?
On our 0-100 score Exergy3 rates higher (53/100 against 48/100). 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 18 data points above: read the rows that match what you are buying for.
How do Exergy3 and H2SITE compare on the numbers?
Exergy3 leads on our overall score (53/100 against 48/100). H2SITE leads on agent readiness (30/100 against 21/100), domain rating (48/100 against 26/100), funding raised ($50.0M against $25.5M).
Read the full Exergy3 review and pricing or the H2SITE review and pricing. You can also browse other Exergy3 alternatives we track.

