Bolt (StackBlitz)
AI coding tools · https://bolt.new
Verdict: Hold · Confidence: medium · Reviewed 2026-10-15
Bolt is StackBlitz's browser agent for building apps, launched on WebContainers the company had built since 2017. Investor Madrona wrote on January 28, 2025 that Bolt.new went from $0 to $20 million in annualized revenue in eight weeks. Bloomberg, via Yahoo Finance on January 21, 2025, quoted CEO Eric Simons saying the company was raising $83.5 million at a $700 million valuation, had nearly 1 million monthly users, and had generated tens of millions in annual recurring revenue. No 2026 revenue update was found. The product ramped for real; the public numbers stop in early 2025.
Rubric
| Dimension | Score (1–5) | Notes & sources |
|---|---|---|
| Real customers & revenue quality Are there named paying customers, recurring revenue, and retention evidence? | 3/5 | Per Madrona, Bolt.new grew from $0 to $20 million in annualized revenue in eight weeks in fall 2024. Per Bloomberg as carried by Yahoo Finance, Simons said Bolt.new had nearly 1 million users each month and tens of millions in annual recurring revenue as of January 2025. No later ARR was found.
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| Unit economics Do gross margins survive inference/compute costs? Is pricing durable? | Unknown | Unknown — no public figure found. Madrona says browser WebContainers reduce infrastructure cost and does not give a margin. |
| Moat Proprietary data, distribution, switching costs, or tech that is hard to copy? | 3/5 | Per Madrona, Bolt runs on WebContainers, a browser runtime StackBlitz built over seven years, which they argue cuts hosting cost and speeds iteration versus a pure model wrapper.
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| Platform risk Could a model provider or incumbent ship this as a feature? (higher score = lower risk) | 2/5 | Bolt turns natural-language prompts into apps using frontier models. Madrona compares the category to GitHub Copilot and Cursor. The browser runtime is proprietary; the generation layer is not.
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| Team & execution Shipping cadence, leadership track record, stability. | 3/5 | Per Simons in the Bloomberg account, the company was near a shutdown five months before the January 2025 story, then launched Bolt.new. Madrona documents the eight-week ramp to $20 million annualized. No 2026 operating update was found.
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| Funding vs. traction Is capital raised justified by verifiable traction? | 3/5 | Per Bloomberg/Yahoo, StackBlitz was set to raise $83.5 million at a $700 million valuation after a previously unreported $22 million Series A, against tens of millions of ARR. The round was described as talks being finalized, attributed to the CEO.
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| Hype signals Demo-driven marketing, vague metrics, valuation outrunning evidence? (higher score = fewer red flags) | 2/5 | The last primary figures found are from January 2025. Emergence's Joe Floyd told Bloomberg the product was growing faster than Zoom or Salesforce at a similar stage. That comparison, plus no subsequent public ARR, is a hype flag on top of a real early ramp.
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Listing source: https://bolt.new. Revenue, users, and valuation figures appear only when publicly sourced; otherwise they are marked unknown.