Straight answers to the "which one do we actually use" question — Faker vs. WealthSchema, build vs. buy, anonymized real data vs. synthetic — each ending in a specific recommendation, not a hedge.
Anonymized client records can be re-identified just by combining zip code, age, income bracket, and holdings — a risk synthetic data doesn't carry. Here's when each approach actually holds up.
No matter how you bootstrap it, historical replay can only produce paths that already happened — understating tail risk once your horizon outruns the historical record. That's where regime-switching synthesis wins.
Aggregators like Plaid and Yodlee get you broad coverage fast, but normalization drops lot-level basis and corporate-action history — data tax-aware features need. Direct custodian feeds give that back, one integration at a time.
Domestic-only test data works fine until a cross-border customer shows up, a foreign fund hits the tax engine, or an auditor asks how you handle PFIC — a gap that's either Phase 2 or one you're already shipping with.
The lump-sum offer is an implicit bet on a discount rate the plan already picked — beat it with the cash, or let the annuity carry the longevity risk instead. Life expectancy and estate goals should change which one you pick.
Run against 543 unseen financial-planning decisions, verbatim storage answers 92% of questions, the best extraction pipeline 46.5%, and the strongest temporal graph 21.5% overall — while beating every other system at putting decisions in order.
LoCoMo asks whether a fact from session 3 surfaces in session 30 of a chat log. It never asks why a decision was made, who overrode it, or which rule governed it — three newer benchmarks test exactly that.
LongMemEval's answer key exists because a human annotator read the conversation and wrote it down. DecisionSynth Bench's answer key exists because the generator that created the scenario emitted it automatically. Same job — ground truth — two different sources of error.
Four public benchmarks anchor agent-memory evaluation in 2026, and each tests a different axis — raw conversational recall, sustained-session nuance, extreme context length, or decision structure. None of them substitute for the others.
A firm's own CRM notes are real, but they're not PII-clear, they don't come with a verified answer key, and the decisions worth testing against are the rare ones — the exact three problems a purchased, known-answer decision corpus doesn't have.
A memory system either stores what it's given close to verbatim, extracts discrete facts from it, or builds a time-stamped graph out of it — and the unit it retrieves in, not the vendor name on the box, is what determines which questions it can actually answer.
A chat transcript records what a client said. It almost never records why a recommendation was overridden or which rule permitted it — the exact fields a decision-shaped question needs, and the reason seed content has to match the question, not just exist in volume.
A document index can tell an agent what's permitted. It can't tell it what a specific advisor actually decided for a specific client and why — and asking it to try produces a plausible-sounding answer that isn't grounded in anything that really happened.
Building your own synthetic-data generator looks easy until calibration, validation, and regulatory maintenance start eating the schedule — the part most teams don't budget for. Buying the catalog is often cheaper; here's when.
Tonic.ai de-identifies your production database for lower environments — same schema, same gaps, no fintech logic like IRMAA brackets or lot-level basis built in. WealthSchema starts from archetypes that already carry that depth.
Gretel trains on your real customer data — strong for ML pipelines, but its privacy guarantees loosen at the fidelity level fintech wealth data needs. WealthSchema skips training data, built from public references instead.
MOSTLY AI trains on your real customer data, so its synthetic output only knows the edge cases your book already contains — no IRMAA brackets or multi-state filers otherwise. WealthSchema pre-builds them regardless.
Mockaroo samples each field independently, fine for CI fixtures — not for a household whose age, income, and account balance need to actually agree with each other. That's where fintech testing needs more than mock data.
Synthesized bundles synthesis, masking, subsetting, and provisioning into one platform — broad, but generalist enough that IRMAA brackets or K-1 cascade aren't pre-built. WealthSchema trades that breadth for depth.
Hazy synthesizes from your own customer data for UK and European banks under FCA and GDPR rules. If you're a US fintech without that data, or need IRMAA, RMD, or multi-state edge cases, the fit breaks down fast.
Howso's instance-based ML traces synthetic records back to real-data lineage — different, but it still needs your customer data to train on. WealthSchema needs none: fintech edge cases built from public references alone.
Faker is free and everywhere, and it's the right call for CI fixtures and dev sandboxes. It falls apart the moment your engine needs a household where age, income, and account balance actually agree with each other — Faker has no way to know those fields are supposed to be consistent. Here's exactly where that line is.
SDV is rigorous and open source — but it only works once you supply real customer data and the engineering time to build a pipeline. WealthSchema needs neither: fintech households generated from public sources alone.
Delphix masks and virtualizes production data fast, but masked data still carries every gap and bias already in your book of business. WealthSchema generates the fintech edge cases that were never there to begin with.
K2view's synthesis sits inside a broader entity-based data platform, so fintech logic like IRMAA brackets and K-1 cascades isn't pre-built in. WealthSchema ships that depth directly — no platform, no customer data required.
Privitar (now Informatica) folds synthesis into a broader enterprise privacy platform — masking and governance, not fintech content. Lot-level basis or K-1 cascade only show up if your own source data already has them.