ALKARTIS doesn't generate figures — it connects ones that already exist in public systems. That means accuracy is bounded by the source agency's own data, not by us.
CompensationAtlas pulls from OpenDataPhilly's public payroll records, covering every city employee's title, department, and salary from 2016 to present. TaxAssessmentIQ pulls directly from the Office of Property Assessment (OPA) for live assessment records and recent comparable sales. LandlordEye and BlockWatcher draw on Licenses & Inspections (L&I) permits and violations and 311 service requests. BuildSignal draws on L&I building and construction permit filings. The full breakdown, dataset by dataset, is on Data & Sources.
Update frequency varies by source system — some feeds refresh continuously, others on a quarterly or as-published basis. Payroll data updates quarterly as OpenDataPhilly publishes new figures; OPA assessment and comparable sales data reflects live records as pulled.
ALKARTIS is only as accurate as the source agency's own data. If an underlying public record contains an error, that error can carry through to what you see in the product — we connect and explain the records, we don't independently verify or correct them against ground truth. Where this matters for a specific product, the relevant product page and FAQ say so directly.
Treat every figure as traceable to a specific, checkable public source — because it is. If a number looks wrong, the right next step is usually to check the original source record (OpenDataPhilly or OPA) rather than assume ALKARTIS made an error in connecting it, though of course reach out through Contact if something looks off.
No — every figure traces back to a specific public record. Nothing shown is generated or estimated by ALKARTIS itself.
CompensationAtlas covers 2016 to present. Historical depth availability depends on your plan tier — see Choosing the Right Plan.
Reach out through Contact — if it traces back to the source agency's data, we can help point you toward the right correction channel.
For a deeper walkthrough of what's public in Philadelphia and where it comes from, see our Philadelphia Public Records Guide.