[BreachNoticePulse](/v/breachnoticepulse) / compare

# TransUnion, LLC vs Prosper Marketplace Inc.: BreachNoticePulse comparison

**Prosper Marketplace Inc.'s State residents affected (WA, DE) of 48,397 is 2.3x TransUnion, LLC's 21,043 (93rd percentile). TransUnion, LLC is dated 2025-08-26; Prosper Marketplace Inc. 2025-12-09.**

Data as of 2026-11-05 · [Compiled by Zalwin](/research/breachnoticepulse) from Washington State Attorney General data breach notifications (data.wa.gov) and California Attorney General data security breach list (oag.ca.gov) Copy citation

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## How does TransUnion, LLC compare to Prosper Marketplace Inc.?

| Field | TransUnion, LLC | Prosper Marketplace Inc. |
|---|---|---|
| Organization | TransUnion, LLC | Prosper Marketplace Inc. |
| Attorney General notified | DE | DE |
| Notice date | 2025-08-26 | 2025-12-09 |
| Breach dates | 2025-07-28 | 2025-04-29 |
| State residents affected | 21,043 | 48,397 |
| Total affected (all states) | 4,461,511 | 13,076,476 |
| Data exposed | Social Security number | Social Security number, Federal identification card number, Account number, credit card account number, or debit card number, in combination with any required security code, access code, or password that would permit access to a financial account |
| Notice letter | https://attorneygeneral.delaware.gov/wp-content/uploads/sites/50/2026/01/Transunion_U.S.-Adult-Consumer-Letter.pdf | https://attorneygeneral.delaware.gov/wp-content/uploads/sites/50/2026/01/Prosper_Sample-Individual-Notice-12-09-25.pdf |
| Days from discovery to notice | 28 | 99 |
| State residents affected (WA, DE) percentile | 88th | 93rd |
| Score | 40/100 | 40/100 |
| Peer rank and all 101 DE records (CSV) | Every comparable record ranked, with amounts, dates and scores 🔒 Click to unlock → |
| Official source URLs for every peer record | Direct links to each record at its government source 🔒 Click to unlock → |

Official records: [TransUnion, LLC](https://data.delaware.gov/d/dir6-wx8v) · [Prosper Marketplace Inc.](https://data.delaware.gov/d/dir6-wx8v)

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From the Washington, California and Delaware Attorney General breach notification lists, as posted. A notice is the organization's own report under state breach-notification law; it is not a finding of wrongdoing or of harm. California does not publish cause or counts in its list; Delaware lists data types and counts but not cause. Read the notice on the AG site before relying on it.

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