BL vs SMWB: Correlation
BlackLine, Inc. (BL) and Similarweb Ltd. (SMWB) show a moderate relationship: their 3-year correlation of weekly returns is 0.49.
Data as of 2026-08-27 · refreshed every trading day · weekly returns · methodology
How correlated are BL and SMWB?
Over the past 3 years, BL and SMWB moved with a correlation of 0.49, which is moderate. The relationship has been stable: the 1-year correlation (0.56) sits close to the 3-year figure. Over 5 years the correlation is 0.48, and the annualized covariance of weekly returns is 1367.1 %².
By 3-year correlation, SMWB places #9 of the 15 assets tracked against BL. Correlation aside, the last 12 months split them widely, with SMWB ahead by 32.4 points (-38.3% versus -5.9%). One caveat on sizing: SMWB is 1.7 times as volatile as the other leg, so an equal-dollar split is far from equal-risk.
How is this computed?
Pearson correlation on weekly returns: ρ(A,B) = cov(rA, rB) / (σA · σB), over windows of 52, 156 and 260 weeks. Covariance is annualized (×52) and expressed in %². Full definitions on the methodology page.
BL vs SMWB: side by side
| BL (BlackLine, Inc.) | SMWB (Similarweb Ltd.) | |
|---|---|---|
| 1-year return | -38.3% | -5.9% |
| 5-year return | -69.6% | -52.1% |
| Volatility (ann.) | 40.7% | 68.1% |
| Beta vs S&P 500 | 0.83 | 0.91 |
| Max drawdown (3Y) | -63.2% | -86.7% |
| Market cap | $2.0B | $0.8B |
| P/E (trailing) | 60.2 | – |
| Dividend yield | 0.00% | 0.00% |
| Sector / category | US Listed | US Listed |
Year-by-year returns
| Year | BL | SMWB |
|---|---|---|
| 2022 | -35.0% | -64.1% |
| 2023 | -7.2% | -17.1% |
| 2024 | -2.7% | +165.9% |
| 2025 | -9.0% | -47.1% |
| 2026 | -39.0% | +22.7% |
Calendar-year price returns; the current year is year-to-date as of the data date above.
Are BL and SMWB good diversifiers for each other?
Yes, to a useful degree: a correlation of 0.49 leaves real independence between the two, which historically damped combined volatility.
FAQ
What is the correlation between BL and SMWB?
As of 2026-08-27, the correlation of weekly returns between BL and SMWB is 0.49 over 3 years, 0.56 over 1 year and 0.48 over 5 years.
Is SMWB a good diversifier for BL?
Yes, to a useful degree: a correlation of 0.49 leaves real independence between the two, which historically damped combined volatility.
What does a correlation of 0.49 mean?
Correlation ranges from −1 to +1. Values near +1 mean two assets move together, near 0 that they move independently, and negative values that they tend to move in opposite directions. It measures co-movement, not performance.
Use this data
$ curl https://www.pairbook.io/api/v1/pairs/bl-vs-smwb.json
Embed this badge (it refreshes with the data), with attribution:
[](https://www.pairbook.io/pair/bl-vs-smwb/)
No key needed, free to use. Full endpoint list in the API documentation.
Related comparisons
Hubs: BL correlations · SMWB correlations
