Cobblestone Car Wash vs ModWash
Data updated · May 24, 2026
ModWash is larger (127 vs 114 locations); ModWash is rated higher (4.85★ vs 4.09★); ModWash has the lower reviewer-reported damage rate (0.83% vs 5.52%).
Cobblestone Car Wash and ModWash are both national-tier US car wash operators. ModWash edges ahead on review-weighted rating (4.85★ vs 4.09★, a meaningful gap). On reviewer-reported damage, ModWash runs lower at 0.83% vs 5.52% — a substantial operating-quality gap. The dataset-wide average across all car wash chains is roughly 1–3%.
| Metric | Cobblestone Car Wash cobblestone.com | ModWash modwash.com |
|---|---|---|
| Locations | 114 4 states | 127 12 states |
| Reviews | 50,560 13,510 LLM-scored | 182,068 70,105 LLM-scored |
| Avg rating | 4.09 | 4.85 |
| Damage rate (lower better) | 5.52% | 0.83% |
| Membership cancellation friction (of mem-discussing reviews) | 21.9% | 12.4% |
| Dominant format | Express Tunnel | Express Tunnel |
Cobblestone Car Wash operates 114 locations across 4 states (28.5 sites per state on average). ModWash runs 127 locations across 12 states, 10.6 per state. Cobblestone Car Wash has a denser per-state footprint (28.5 sites/state vs 10.6 for ModWash), suggesting a more saturated regional strategy. Total customer signal is 50,560 Google reviews for Cobblestone Car Wash (13,510 LLM-scored) vs 182,068 for ModWash (70,105 scored).
How do customers rate each chain on the 7 pillars?
Aspect scores aggregate WashIndex's LLM extractions across each chain's reviews. Each score is (positive − negative) / total mentions, ranging −1 to +1. Numbers above zero mean customers say more positive than negative things about the aspect; below zero means the reverse.
| Aspect | Cobblestone Car Wash | ModWash | Winner |
|---|---|---|---|
| Wash Quality | +0.14 | +0.75 | ModWash |
| Staff & Customer Service | +0.51 | +0.94 | ModWash |
| Wait Time | +0.12 | +0.64 | ModWash |
| Per-Wash Price | -0.39 | +0.24 | ModWash |
| Equipment Working | -0.54 | -0.33 | ModWash |
| Facility Cleanliness | +0.58 | +0.79 | ModWash |
| Membership Value | -0.31 | +0.25 | ModWash |
Cobblestone Car Wash's strongest aspect in customer reviews is Facility Cleanliness (+0.58); the weakest is Equipment Working (-0.54). ModWash's strongest is Staff & Customer Service (+0.94); the weakest is Equipment Working (-0.33). ModWash comes out ahead on Wash Quality, Staff & Customer Service, Wait Time, Per-Wash Price, Equipment Working, Facility Cleanliness, Membership Value; Cobblestone Car Wash doesn't have a clear win on any of the 7 pillars.
ModWash has the lower cancellation-friction rate (12.4% vs 21.9% of mem-discussing reviews) — a substantial gap. The dataset-wide rate is roughly 10–15%. Customers discuss memberships more often when reviewing Cobblestone Car Wash (18.7% of reviews) than the alternative (8.5%), which usually signals a more aggressively-marketed unlimited-wash program.
Do they operate the same format of car wash?
| Format | Cobblestone Car Wash | ModWash |
|---|---|---|
| Express Tunnel | 7.2% | 2.1% |
| Full Service | 5.0% | 3.6% |
| Detail Shop | 2.6% | 0.4% |
| Hand Wash | 0.9% | 1.5% |
| Self-Serve Bay | 1.6% | 0.6% |
Format share is computed across customer review mentions, not over locations. A chain with mostly express-tunnel sites but heavy detail-shop talk in reviews will show both at non-trivial rates.
Format-mix-wise, Cobblestone Car Wash and ModWash are matched: both lean Express Tunnel. The differentiator isn't what they do, it's how they do it.
Where do Cobblestone Car Wash and ModWash compete?
Cobblestone Car Wash and ModWash don't share any of the US metropolitan statistical areas we cover, so there's no current head-to-head competition between them. In short: If customer-rating consistency is the deciding factor, ModWash is the safer pick; if avoiding vehicle damage is the priority, ModWash runs the lower reviewer-reported damage rate.
About Cobblestone Car Wash vs ModWash
Cobblestone Car Wash vs ModWash: which is bigger?
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Which has the higher customer rating, Cobblestone Car Wash or ModWash?
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Which has the lower damage rate, Cobblestone Car Wash or ModWash?
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About this comparison
Both chains' numbers are pulled from the same WashIndex per-location dataset — Google reviews processed through LLM extraction across 55 dimensions, format classification from each operator's website, and competitive-density analysis. See each chain's full profile — Cobblestone Car Wash / ModWash — for monthly trends, per-location drill-down, executive summary, and anomaly detection.
See our full methodology for the extraction pipeline, validation samples, and aggregation logic.