Company Comparison
Silent Sentinel vs Boom Supersonic
Side-by-side comparison of two portfolio companies — sector, funding stage, investors, valuation, and more.
| Metric | Silent Sentinel | Boom Supersonic |
|---|---|---|
| Sector | Aerospace & Defense | Aerospace & Defense |
| Headquarters | Cambridge, United Kingdom | Denver, Colorado |
| Founded | 2005 | 2014 |
| Status | Active | Active |
| Last Funding Stage | — | Series C |
| Total Funding | — | $270M |
| Valuation | — | $3B |
What They Build
Silent Sentinel
Silent Sentinel is a 1929 American silent crime film directed by Alan James and starring Gareth Hughes and Josephine Hill.
Boom Supersonic
Aerospace company developing supersonic passenger aircraft to make supersonic travel mainstream and sustainable.
Key Investors
Silent Sentinel
Boom Supersonic
Sector Overlap
Both Silent Sentinel and Boom Supersonic operate in Aerospace & Defense.
Browse all Aerospace & Defense companies →Websites
The operating system for private capital.
Archstone runs the back office for venture, PE, real estate, and credit funds — LP reporting, capital calls, portfolio tracking, and fund accounting, in one platform. Now in alpha.
Now in alpha with select funds. 14-day trial available.