Side-by-side IPO readiness, funding history, and valuation comparison. Data sourced by TechStackIPO.
Scores, valuations, and signals for OpenAI, Sierra Space, and 370+ companies. 5-min read every Tuesday.
OpenAI is valued at $920B — the world's most valuable AI company, backed by over $65B in funding. The company recently restructured as a Public Benefit Corporation to support its mission of developing safe AGI.
| Industry | Artificial Intelligence |
| Stage | Pre-IPO |
| IPO Status | Private |
| Valuation | $920.0B |
| Total Funding | $65.4B |
| Headquarters | San Francisco, CA |
Dream Chaser spaceplane developer. NASA cargo missions. Space station development. Sierra Space IPO candidate as commercial space station market matures.
| Stage | Series D+ |
| IPO Status | Pre-IPO |
| Valuation | $6B |
| Total Funding | Funding undisclosed |
| Headquarters | Louisville, CO |
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OpenAI is valued at $920.0B. Sierra Space is valued at $6B. Both valuations are based on the most recent private funding rounds tracked by TechStackIPO.
OpenAI has raised $65.4B. Sierra Space has raised Funding undisclosed.
OpenAI is currently private. Sierra Space is currently pre-IPO. Track both on TechStackIPO for S-1 filings and IPO announcements.
OpenAI operates in Artificial Intelligence, while Sierra Space operates in an undisclosed sector.
OpenAI is a Artificial Intelligence company valued at $920.0B with $65.4B raised. Sierra Space is a private tech company valued at $6B with Funding undisclosed raised. See TechStackIPO's full side-by-side comparison for IPO readiness scores, funding timelines, and investor data.
Accredited investors can access pre-IPO shares in OpenAI and Sierra Space through secondary market platforms, pre-IPO funds, and broker-dealer platforms that facilitate private company transactions. TechStackIPO's marketplace section tracks available access options for both companies. Pre-IPO investments carry higher risk and limited liquidity.