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Side-by-side financial comparison of Fastly, Inc. (FSLY) and iRhythm Holdings, Inc. (IRTC). Click either name above to swap in a different company.
iRhythm Holdings, Inc. is the larger business by last-quarter revenue ($208.9M vs $172.6M, roughly 1.2× Fastly, Inc.). iRhythm Holdings, Inc. runs the higher net margin — 2.7% vs -9.0%, a 11.7% gap on every dollar of revenue. On growth, iRhythm Holdings, Inc. posted the faster year-over-year revenue change (27.1% vs 22.8%). iRhythm Holdings, Inc. produced more free cash flow last quarter ($14.5M vs $12.2M). Over the past eight quarters, iRhythm Holdings, Inc.'s revenue compounded faster (25.8% CAGR vs 13.7%).
Fastly, Inc. is an American company based in San Francisco, which describes itself as a cloud computing company. Fastly provides content delivery network services, image optimization, and load balancing services. Fastly's cloud security services include denial-of-service attack protection, bot mitigation, and a web application firewall.
iRhythm Holdings is a digital healthcare company focused on cardiac care, developing and commercializing wearable ambulatory heart monitoring devices paired with AI-powered analytical tools. It primarily serves healthcare providers and patients across the United States, helping to detect undiagnosed arrhythmias such as atrial fibrillation through convenient long-term heart rhythm tracking that delivers actionable clinical insights.
FSLY vs IRTC — Head-to-Head
Income Statement — Q4 FY2025 vs Q4 FY2025
| Metric | | |
|---|---|---|
| Revenue | $172.6M | $208.9M |
| Net Profit | $-15.5M | $5.6M |
| Gross Margin | 61.4% | 70.9% |
| Operating Margin | -8.7% | 1.1% |
| Net Margin | -9.0% | 2.7% |
| Revenue YoY | 22.8% | 27.1% |
| Net Profit YoY | 52.9% | 518.5% |
| EPS (diluted) | $-0.10 | $0.18 |
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 | $172.6M | $208.9M | ||
| Q3 25 | $158.2M | $192.9M | ||
| Q2 25 | $148.7M | $186.7M | ||
| Q1 25 | $144.5M | $158.7M | ||
| Q4 24 | $140.6M | $164.3M | ||
| Q3 24 | $137.2M | $147.5M | ||
| Q2 24 | $132.4M | $148.0M | ||
| Q1 24 | $133.5M | $131.9M |
| Q4 25 | $-15.5M | $5.6M | ||
| Q3 25 | $-29.5M | $-5.2M | ||
| Q2 25 | $-37.5M | $-14.2M | ||
| Q1 25 | $-39.1M | $-30.7M | ||
| Q4 24 | $-32.9M | $-1.3M | ||
| Q3 24 | $-38.0M | $-46.2M | ||
| Q2 24 | $-43.7M | $-20.1M | ||
| Q1 24 | $-43.4M | $-45.7M |
| Q4 25 | 61.4% | 70.9% | ||
| Q3 25 | 58.4% | 71.1% | ||
| Q2 25 | 54.5% | 71.2% | ||
| Q1 25 | 53.2% | 68.8% | ||
| Q4 24 | 53.4% | 70.0% | ||
| Q3 24 | 54.5% | 68.8% | ||
| Q2 24 | 55.1% | 69.9% | ||
| Q1 24 | 54.8% | 66.3% |
| Q4 25 | -8.7% | 1.1% | ||
| Q3 25 | -18.2% | -4.4% | ||
| Q2 25 | -24.8% | -10.0% | ||
| Q1 25 | -26.4% | -20.5% | ||
| Q4 24 | -24.4% | -2.5% | ||
| Q3 24 | -29.6% | -34.1% | ||
| Q2 24 | -35.3% | -15.5% | ||
| Q1 24 | -34.6% | -28.9% |
| Q4 25 | -9.0% | 2.7% | ||
| Q3 25 | -18.6% | -2.7% | ||
| Q2 25 | -25.2% | -7.6% | ||
| Q1 25 | -27.1% | -19.3% | ||
| Q4 24 | -23.4% | -0.8% | ||
| Q3 24 | -27.7% | -31.3% | ||
| Q2 24 | -33.0% | -13.6% | ||
| Q1 24 | -32.5% | -34.6% |
| Q4 25 | $-0.10 | $0.18 | ||
| Q3 25 | $-0.20 | $-0.16 | ||
| Q2 25 | $-0.26 | $-0.44 | ||
| Q1 25 | $-0.27 | $-0.97 | ||
| Q4 24 | $-0.23 | $-0.03 | ||
| Q3 24 | $-0.27 | $-1.48 | ||
| Q2 24 | $-0.32 | $-0.65 | ||
| Q1 24 | $-0.32 | $-1.47 |
Balance Sheet & Financial Strength
Snapshot of each company's liquidity, leverage and book value from the latest quarter.
| Metric | | |
|---|---|---|
| Cash + ST InvestmentsLiquidity on hand | $361.8M | $583.8M |
| Total DebtLower is stronger | — | — |
| Stockholders' EquityBook value | $929.6M | $152.7M |
| Total Assets | $1.5B | $1.0B |
| Debt / EquityLower = less leverage | — | — |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $361.8M | $583.8M | ||
| Q3 25 | $342.9M | $565.2M | ||
| Q2 25 | $321.2M | $545.5M | ||
| Q1 25 | $307.3M | $520.6M | ||
| Q4 24 | $295.9M | $535.6M | ||
| Q3 24 | $308.2M | $522.0M | ||
| Q2 24 | $311.8M | $561.5M | ||
| Q1 24 | $329.5M | $569.1M |
| Q4 25 | $929.6M | $152.7M | ||
| Q3 25 | $937.0M | $121.9M | ||
| Q2 25 | $942.6M | $103.7M | ||
| Q1 25 | $957.0M | $86.7M | ||
| Q4 24 | $965.3M | $90.9M | ||
| Q3 24 | $969.5M | $71.8M | ||
| Q2 24 | $981.2M | $99.2M | ||
| Q1 24 | $991.8M | $90.3M |
| Q4 25 | $1.5B | $1.0B | ||
| Q3 25 | $1.5B | $995.2M | ||
| Q2 25 | $1.5B | $964.0M | ||
| Q1 25 | $1.4B | $926.1M | ||
| Q4 24 | $1.5B | $931.4M | ||
| Q3 24 | $1.5B | $909.7M | ||
| Q2 24 | $1.5B | $919.2M | ||
| Q1 24 | $1.5B | $909.8M |
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 | $22.4M | $26.2M |
| Free Cash FlowOCF − Capex | $12.2M | $14.5M |
| FCF MarginFCF / Revenue | 7.1% | 6.9% |
| Capex IntensityCapex / Revenue | 5.9% | 5.6% |
| Cash ConversionOCF / Net Profit | — | 4.70× |
| TTM Free Cash FlowTrailing 4 quarters | $65.8M | $34.5M |
8-quarter trend — quarters aligned by calendar period.
| Q4 25 | $22.4M | $26.2M | ||
| Q3 25 | $28.9M | $34.9M | ||
| Q2 25 | $25.8M | $27.7M | ||
| Q1 25 | $17.3M | $-7.9M | ||
| Q4 24 | $5.2M | $19.2M | ||
| Q3 24 | $5.0M | $24.3M | ||
| Q2 24 | $-4.9M | $11.8M | ||
| Q1 24 | $11.1M | $-52.0M |
| Q4 25 | $12.2M | $14.5M | ||
| Q3 25 | $22.9M | $20.1M | ||
| Q2 25 | $15.9M | $17.3M | ||
| Q1 25 | $14.7M | $-17.3M | ||
| Q4 24 | $251.0K | $12.4M | ||
| Q3 24 | $3.0M | $15.5M | ||
| Q2 24 | $-6.7M | $3.4M | ||
| Q1 24 | $9.5M | $-61.8M |
| Q4 25 | 7.1% | 6.9% | ||
| Q3 25 | 14.5% | 10.4% | ||
| Q2 25 | 10.7% | 9.3% | ||
| Q1 25 | 10.2% | -10.9% | ||
| Q4 24 | 0.2% | 7.5% | ||
| Q3 24 | 2.2% | 10.5% | ||
| Q2 24 | -5.1% | 2.3% | ||
| Q1 24 | 7.1% | -46.8% |
| Q4 25 | 5.9% | 5.6% | ||
| Q3 25 | 3.8% | 7.7% | ||
| Q2 25 | 6.6% | 5.6% | ||
| Q1 25 | 1.8% | 5.9% | ||
| Q4 24 | 3.5% | 4.2% | ||
| Q3 24 | 1.5% | 6.0% | ||
| Q2 24 | 1.3% | 5.7% | ||
| Q1 24 | 1.2% | 7.4% |
| Q4 25 | — | 4.70× | ||
| Q3 25 | — | — | ||
| Q2 25 | — | — | ||
| Q1 25 | — | — | ||
| Q4 24 | — | — | ||
| Q3 24 | — | — | ||
| Q2 24 | — | — | ||
| Q1 24 | — | — |
Financial Flow Comparison
Revenue → gross profit → operating profit → net profit for each company.
Revenue Breakdown by Segment
FSLY
| Network Services | $130.8M | 76% |
| Security | $35.4M | 21% |
| Other | $6.4M | 4% |
IRTC
| Commercial Payors | $111.7M | 53% |
| Centers For Medicare And Medicaid | $49.2M | 24% |
| Healthcare Institutions | $34.3M | 16% |
| Non Contracted Third Party Payors | $13.7M | 7% |
