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Data provenance

Where Linden pricing comes from

A budget is only as good as the data under it. This page accounts for every source Linden uses: the 125 city multipliers, the 19,000+ vendor directory, the community benchmarks, and the refresh cadence for each.

By Linden EditorialBudget research teamLast reviewed
Cities covered
125+
EU + US
Vendors in directory
19,000+
initial seed, Q1 2026
Community benchmarks
3 markets live
DK · UK · US-West
Multiplier refresh
Quarterly

City multipliers

Each of the 125 covered cities carries a cost multiplier between roughly 0.55 and 1.85, normalized against the EU median (for EU cities) or the US median (for US cities). The multiplier is a weighted geometric mean of four concrete inputs:

  • Venue hire quotes — 3–6 representative venues per capacity tier (80/120/200 guests), priced for a Saturday in peak season. Reviewed quarterly.
  • Catering per-person — Three-course plated menu from 3 local caterers, excluding drinks. Drinks run on a separate index because service patterns differ between EU (included) and US (stacked).
  • Photographer day rate — 8-hour lead photographer package with delivered edited gallery. Controlled for experience tier.
  • Florist median package — Bridal bouquet + 8 centerpieces + ceremony arrangement. Seasonality is normalized out so the multiplier tracks the market, not the calendar.

Vendor directory

The initial 19,000-vendor seed is US-focused and was imported from a legal-licensed partnership with a prior wedding-platform. Every vendor carries a source reference so provenance is auditable per row. A quality score (0–100) gates which vendors surface on public directory pages — scores below 70 stay internal, used only by the compare and copilot features.

European vendor coverage is currently sparse and is being expanded market-by-market: DK, SE, NO, DE, UK, FR are the priority queue for 2026.

Tax & service charge tables

VAT rates for 26 countries and sales tax for every US state + DC are hand-maintained and version-controlled. When a rate changes by legislation, the engine picks it up on the next deploy — we do not rely on third-party tax APIs at request time.

Community benchmarks

A benchmark is a p25/p50/p75 band per category per (market, guest-count-tier, overlay-set) cell, computed from anonymized, aggregated budgets closed by Linden couples in the last 18 months. A cell is published only when ≥50 couples contribute — below that, the band is suppressed and the page uses engine-only estimates. No individual couple is ever identifiable from a benchmark.

Reporting a data error

If a specific number looks wrong — a vendor listing, a city multiplier, a tax rate — please email us at data@linden.app with the URL and the correction. Data corrections are batched weekly and shipped on the next deploy.

Related reading

Budget methodology — the 11-layer pipeline

Frequently asked questions

Is the vendor data bought or scraped?
Neither. The vendor directory is a mix of publicly listed price sheets, legally licensed industry catalog data, and seed data from a prior wedding-platform partnership. New vendors are added manually or via structured submission.
How often is pricing refreshed?
City multipliers are reviewed quarterly. Industry baseline (the ITEM_MAP pricing models) is revised annually. The vendor directory is re-hosted and quality-scored quarterly. VAT / sales-tax rates are updated immediately on legislative change.
Does Linden use my data to train models?
Only in aggregated, pseudonymized form — and only to calibrate the ML pricing layer, never to train large language models. Individual budgets, guest lists, and contact details are never used for training. Full detail in our privacy policy.
What are community benchmarks?
When ≥50 couples have closed their budget in a given market in the past 18 months, we aggregate p25/p50/p75 bands per category and attach them to percentile displays on your pages. No individual couple can be identified — the threshold is designed to guarantee that.
Can I see where my city's multiplier comes from?
Yes. The multiplier is built from four inputs: (1) venue hire quotes per capacity tier, (2) caterer per-person rates, (3) lead-photographer day rates, (4) florist median package size. Each input is refreshed quarterly; the multiplier is their weighted geometric mean relative to the EU/US median.

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