Form Energy vs Fourth Power
Form Energy vs Fourth Power, compared side by side on 13 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: Form Energy is on 60/100 and Fourth Power on 51/100.
Where each one leads
Form Energy
- our overall score: 60/100 against 51/100
- agent readiness: 50/100 against 22/100
- domain rating: 61/100 against 1/100
- funding raised: $1.4B against $49.0M
Fourth Power
Leads on none of the measures we hold for both companies.
At a glance
| Measure | Form Energy | Fourth Power |
|---|---|---|
| What it is | Form Energy develops and manufactures long-duration, grid-scale iron-air batteries for cost-effective renewable energy storage. | Developing advanced battery technology for grid-scale energy storage. |
| Category | Batteries, Climate Tech, Energy Storage, Renewable Energy | Energy Storage, Battery Technology, Clean Energy, Grid Modernization |
| Sells toBusiness model | B2B | B2B |
| Offering | Hardware | Hardware |
| Founded | 2017 | 2017 |
| Headquarters | Somerville, United States | San Carlos, United States |
| Status | Active | Active |
Size, funding and growth
| Measure | Form Energy | Fourth Power |
|---|---|---|
| Employees | 500 | Not published |
| Total funding | $1.4B | $49.0M |
| Latest round | Other | Series A-Plus |
| Valuation | $2.3B | Not published |
StartupHub scores
Our own 0-100 ratings. They measure company strength and site quality, not which product suits you.
| Measure | Form Energy | Fourth Power |
|---|---|---|
| StartupHub scoreOur 0-100 rating | 60/100 | 51/100 |
| Traction | 60/100 | Not published |
| Search visibility | 8/100 | 2/100 |
| Quality | 78/100 | Not published |
| Agent readinessHow well an AI agent can read and act on the site | D (50/100) | F (22/100) |
| Domain ratingLink authority, 0-100 | 61/100 | 1/100 |
Technology
Detected on each public site, so it reflects the marketing stack as well as the product.
| Measure | Form Energy | Fourth Power |
|---|---|---|
| Hosting | Google Cloud | Not detected |
Form Energy vs Fourth Power: common questions
Which is better, Form Energy or Fourth Power?
On our 0-100 score Form Energy rates higher (60/100 against 51/100). 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 13 data points above: read the rows that match what you are buying for.
How do Form Energy and Fourth Power compare on the numbers?
Form Energy leads on our overall score (60/100 against 51/100), agent readiness (50/100 against 22/100), domain rating (61/100 against 1/100), funding raised ($1.4B against $49.0M).
Read the full Form Energy review and pricing or the Fourth Power review and pricing. You can also browse other Form Energy alternatives we track.