Side-by-side IPO readiness, funding history, and valuation comparison. Data sourced by TechStackIPO.
Scores, valuations, and signals for Nubank, OpenAI, and 370+ companies. 5-min read every Tuesday.
The world's largest digital banking platform outside of Asia, serving over 130 million customers across Brazil, Mexico, and Colombia as of June 2026.
| Industry | Fintech |
| Stage | Public |
| IPO Status | Public |
| Valuation | $142.5B |
| Total Funding | $2.4B |
| Headquarters | São Paulo, Brazil |
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 | Public |
| IPO Status | Public |
| Valuation | $920.0B |
| Total Funding | $65.4B |
| Headquarters | San Francisco, CA |
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Nubank is valued at $142.5B. OpenAI is valued at $920.0B. Both figures are based on the most recent funding rounds tracked by TechStackIPO.
Nubank's revenue is not publicly disclosed. OpenAI reported 12700000000 arr revenue in 2025. Revenue figures are sourced from TechStackIPO's company database and updated as new data becomes available.
Nubank filed an S-1 in November 2021 and is actively in the IPO pipeline. OpenAI filed an S-1 in June 2026 and is actively in the IPO pipeline. Track both companies on TechStackIPO for S-1 filings, roadshow announcements, and IPO date updates.
Nubank has raised $2.4B. OpenAI has raised $65.4B.
Nubank operates in Fintech, while OpenAI operates in Artificial Intelligence.
Nubank is a Fintech company valued at $142.5B with $2.4B raised. OpenAI is a Artificial Intelligence company valued at $920.0B with $65.4B raised. See TechStackIPO's full side-by-side comparison for IPO readiness scores, funding timelines, and investor access options.
Accredited investors can access pre-IPO shares in Nubank and OpenAI 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.