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Side-by-side financial comparison of Quantum-Si Inc (QSI) and Sidus Space Inc. (SIDU). Click either name above to swap in a different company.
Quantum-Si Inc is the larger business by last-quarter revenue ($451.0K vs $366.0K, roughly 1.2× Sidus Space Inc.). Sidus Space Inc. runs the higher net margin — -3115.2% vs -3904.9%, a 789.7% gap on every dollar of revenue. On growth, Sidus Space Inc. posted the faster year-over-year revenue change (-16.2% vs -62.2%). Sidus Space Inc. produced more free cash flow last quarter ($-6.5M vs $-16.4M). Over the past eight quarters, Quantum-Si Inc's revenue compounded faster (-0.7% CAGR vs -43.8%).
Silicon Quantum Computing Pty Ltd (SQC) is a Sydney, Australia-based quantum computing company.
Sidus Space Inc is a U.S.-headquartered space technology and services provider specializing in small satellite design, manufacturing and operation. It offers end-to-end space solutions including data analytics, on-orbit servicing and custom hardware for commercial, government and academic clients worldwide, supporting various space mission objectives.
QSI vs SIDU — Head-to-Head
Income Statement — Q4 FY2025 vs Q4 FY2025
| Metric | | |
|---|---|---|
| Revenue | $451.0K | $366.0K |
| Net Profit | $-17.6M | $-11.4M |
| Gross Margin | 27.1% | -474.9% |
| Operating Margin | -4677.2% | -3009.2% |
| Net Margin | -3904.9% | -3115.2% |
| Revenue YoY | -62.2% | -16.2% |
| Net Profit YoY | 46.8% | -100.9% |
| EPS (diluted) | $-0.07 | $-0.29 |
Green = leading value per metric. Periods may differ when fiscal calendars don't align.
8-Quarter Revenue & Profit Trend
Side-by-side quarterly history. Quarters aligned by calendar period so offset fiscal years line up.
| Q4 25 | $451.0K | $366.0K | ||
| Q3 25 | $552.0K | $559.1K | ||
| Q2 25 | $591.0K | $691.1K | ||
| Q1 25 | $842.0K | — | ||
| Q4 24 | $1.2M | $436.5K | ||
| Q3 24 | $787.0K | $1.8M | ||
| Q2 24 | $622.0K | $834.8K | ||
| Q1 24 | $457.0K | $845.1K |
| Q4 25 | $-17.6M | $-11.4M | ||
| Q3 25 | $-35.7M | $-6.0M | ||
| Q2 25 | $-28.8M | $-5.6M | ||
| Q1 25 | $-19.2M | — | ||
| Q4 24 | $-33.1M | $-5.7M | ||
| Q3 24 | $-25.3M | $-3.9M | ||
| Q2 24 | $-23.1M | $-4.1M | ||
| Q1 24 | $-19.5M | $-3.8M |
| Q4 25 | 27.1% | -474.9% | ||
| Q3 25 | 35.1% | -232.3% | ||
| Q2 25 | 59.4% | -148.6% | ||
| Q1 25 | 57.7% | — | ||
| Q4 24 | 51.2% | -171.8% | ||
| Q3 24 | 46.6% | 2.2% | ||
| Q2 24 | 56.9% | -100.8% | ||
| Q1 24 | 58.9% | 9.9% |
| Q4 25 | -4677.2% | -3009.2% | ||
| Q3 25 | -7205.3% | -1007.2% | ||
| Q2 25 | -5096.4% | -765.5% | ||
| Q1 25 | -2982.4% | — | ||
| Q4 24 | -2573.6% | -1165.4% | ||
| Q3 24 | -3569.0% | -180.5% | ||
| Q2 24 | -4252.6% | -466.9% | ||
| Q1 24 | -5111.6% | -421.4% |
| Q4 25 | -3904.9% | -3115.2% | ||
| Q3 25 | -6467.9% | -1079.2% | ||
| Q2 25 | -4879.2% | -814.0% | ||
| Q1 25 | -2279.0% | — | ||
| Q4 24 | -2778.6% | -1300.0% | ||
| Q3 24 | -3216.4% | -222.1% | ||
| Q2 24 | -3713.7% | -495.5% | ||
| Q1 24 | -4261.3% | -450.9% |
| Q4 25 | $-0.07 | $-0.29 | ||
| Q3 25 | $-0.17 | $-0.24 | ||
| Q2 25 | $-0.16 | $-0.31 | ||
| Q1 25 | $-0.11 | — | ||
| Q4 24 | $-0.23 | $-0.26 | ||
| Q3 24 | $-0.18 | $-0.93 | ||
| Q2 24 | $-0.16 | $-0.99 | ||
| Q1 24 | $-0.14 | $-1.42 |
Balance Sheet & Financial Strength
Snapshot of each company's liquidity, leverage and book value from the latest quarter.
| Metric | | |
|---|---|---|
| Cash + ST InvestmentsLiquidity on hand | $21.6M | — |
| Total DebtLower is stronger | — | — |
| Stockholders' EquityBook value | $220.2M | $50.6M |
| Total Assets | $245.6M | $66.1M |
| Debt / EquityLower = less leverage | — | — |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $21.6M | — | ||
| Q3 25 | $30.9M | — | ||
| Q2 25 | $22.2M | — | ||
| Q1 25 | $37.3M | — | ||
| Q4 24 | $49.2M | — | ||
| Q3 24 | $42.3M | — | ||
| Q2 24 | $59.6M | — | ||
| Q1 24 | $53.2M | — |
| Q4 25 | $220.2M | $50.6M | ||
| Q3 25 | $235.2M | $24.0M | ||
| Q2 25 | $221.0M | $14.3M | ||
| Q1 25 | $246.9M | — | ||
| Q4 24 | $215.4M | $23.5M | ||
| Q3 24 | $210.5M | $9.3M | ||
| Q2 24 | $233.3M | $13.1M | ||
| Q1 24 | $253.8M | $17.2M |
| Q4 25 | $245.6M | $66.1M | ||
| Q3 25 | $260.1M | $39.9M | ||
| Q2 25 | $254.4M | $29.7M | ||
| Q1 25 | $271.2M | — | ||
| Q4 24 | $247.9M | $37.7M | ||
| Q3 24 | $236.5M | $23.1M | ||
| Q2 24 | $256.7M | $21.8M | ||
| Q1 24 | $275.6M | $25.4M |
Cash Flow & Capital Efficiency
How much cash each business actually produces after reinvestment. Cash flow is harder to manipulate than net income.
| Metric | | |
|---|---|---|
| Operating Cash FlowLast quarter | $-16.3M | $-4.1M |
| Free Cash FlowOCF − Capex | $-16.4M | $-6.5M |
| FCF MarginFCF / Revenue | -3628.4% | -1768.6% |
| Capex IntensityCapex / Revenue | 3.8% | 651.5% |
| Cash ConversionOCF / Net Profit | — | — |
| TTM Free Cash FlowTrailing 4 quarters | $-97.3M | $-28.1M |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $-16.3M | $-4.1M | ||
| Q3 25 | $-32.0M | $-6.2M | ||
| Q2 25 | $-20.2M | $-4.6M | ||
| Q1 25 | $-26.2M | — | ||
| Q4 24 | $-22.9M | $-5.5M | ||
| Q3 24 | $-23.2M | $-2.7M | ||
| Q2 24 | $-18.6M | $-2.2M | ||
| Q1 24 | $-23.2M | $-5.4M |
| Q4 25 | $-16.4M | $-6.5M | ||
| Q3 25 | $-32.9M | $-7.7M | ||
| Q2 25 | $-20.5M | $-6.0M | ||
| Q1 25 | $-27.5M | — | ||
| Q4 24 | $-24.3M | $-7.9M | ||
| Q3 24 | $-24.1M | $-3.8M | ||
| Q2 24 | $-19.7M | $-4.0M | ||
| Q1 24 | $-24.3M | $-7.6M |
| Q4 25 | -3628.4% | -1768.6% | ||
| Q3 25 | -5963.6% | -1369.2% | ||
| Q2 25 | -3472.8% | -870.2% | ||
| Q1 25 | -3261.4% | — | ||
| Q4 24 | -2039.9% | -1811.7% | ||
| Q3 24 | -3065.8% | -213.6% | ||
| Q2 24 | -3164.0% | -477.9% | ||
| Q1 24 | -5307.2% | -905.0% |
| Q4 25 | 3.8% | 651.5% | ||
| Q3 25 | 163.0% | 256.8% | ||
| Q2 25 | 55.3% | 199.1% | ||
| Q1 25 | 155.2% | — | ||
| Q4 24 | 120.4% | 543.4% | ||
| Q3 24 | 123.9% | 58.9% | ||
| Q2 24 | 181.2% | 220.1% | ||
| Q1 24 | 228.9% | 263.9% |
Financial Flow Comparison
Revenue → gross profit → operating profit → net profit for each company.
