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Replica vs StreetLight Data
StreetLight Data measures observed travel directly from mobile location data; Replica simulates a full synthetic population for scenario testing.
Side by side
| Replica | StreetLight Data | |
|---|---|---|
| Vendor | Replica Inc. | StreetLight Data, Inc. |
| Pricing model | Quote only | Quote only |
| Free tier | No | No |
| Deployment | Cloud | Cloud |
| Open source | No | No |
| Best for | Transportation planning agencies needing a full synthetic travel-demand model for long-range scenario planning. | Transportation planners and consultants needing origin-destination and mode-share data without a traditional travel survey. |
| Pricing | Public-agency and enterprise licensing by region and use case; not published. Pricing has not been verified yet — see the vendor's site. | Self-serve software, bulk data/API, and custom services priced by study area and data volume; not published. Pricing has not been verified yet — see the vendor's site. |
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Verdict
Replica's own positioning draws this distinction explicitly: where StreetLight Data measures observed trips, Replica builds a complete synthetic population — a digital twin of everyone in a region, each with a simulated daily travel pattern (mode, timing, route, trip purpose) that statistically matches real behavior, generated from de-identified mobile location data combined with census and land-use data. StreetLight Data works the other direction: it takes anonymized location and connected-vehicle data and expands a real, observed sample into origin-destination and mode-share metrics for a specific study area, closer to a modernized version of a traditional travel survey.
The practical difference shows up in what each one lets you ask. StreetLight answers "what is happening on this corridor now, based on real trips." Replica answers "what would happen across this whole region if we changed this," because its synthetic population is internally consistent across the full area, not just the corridor you studied.
Choose Replica if
- You're doing long-range scenario planning — a new transit line, a major roadway change, a policy scenario — and need a full-region model that stays internally consistent under changes.
- You want an alternative to a traditional household travel survey and four-step demand-forecasting model, not a supplement to one.
- Land-use and demographic integration matters as much as the travel data itself.
Choose StreetLight Data if
- You need an origin-destination or mode-share study for a specific, bounded area and want to pull it yourself through a self-serve tool.
- The deliverable is grounded in directly observed trips rather than a simulated population.
- Bulk data delivery via API, CSV or ArcGIS into your own GIS workflow is a requirement.
The honest caveat
Neither tool publishes pricing, and both are quote-based by region and use case, so cost comparison has to happen in a scoping call rather than up front. Replica is the newer, more architecturally ambitious approach (it was spun out of Alphabet's Sidewalk Labs); StreetLight Data has the longer track record as a direct-measurement tool for agencies that specifically want observed data rather than a simulation. If you are choosing between funding one full synthetic-population license or several bounded StreetLight studies, scope the actual planning questions you need answered over the next few years before committing to either model.
Last reviewed September 22, 2026