Prosper
American online lending platform offering personal loans and investment products.
Last updated August 31, 2026
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Overview
Prosper is one of the first peer-to-peer lending platforms in the US, connecting borrowers and investors, offering personal loans and credit services.
History
Prosper Marketplace was established in 2005 by Chris Larsen and John Witchel and opened its online lending service to the public on February 5, 2006. The company sought to create an internet-based alternative to conventional consumer lending by allowing borrowers to request credit and investors to fund portions of loans. Its initial model resembled an online auction: borrowers listed their needs, while lenders competed on pricing, with the final interest rate emerging from a variable-rate, Dutch-auction-like process. This early structure attracted attention as a new form of peer-to-peer finance but also raised questions about securities regulation. On November 24, 2008, the SEC concluded that Prosper’s loan notes were securities and that the company had violated the Securities Act of 1933. The regulator issued a cease-and-desist order. Prosper suspended lending activity while it registered its notes and adapted its marketplace to the regulatory framework that increasingly applied to the peer-to-peer lending sector. Prosper resumed lending in July 2009 after obtaining SEC registration. The relaunch imposed restrictions on investor participation based on state residence, while borrowers could generally apply from a broader set of states. The company later abandoned its original auction-based rate-setting process. A prospectus filed in December 2010 described a model in which Prosper determined rates using a formula based on the assessed credit risk of each applicant. This transition gave the company greater control over underwriting, pricing, and marketplace consistency. The business attracted substantial private investment during the following decade. Prosper raised a $14.7 million Series D round in April 2010 and a further $17.15 million Series E round in June 2011. Sequoia Capital led a $20 million financing in January 2013, followed by a $25 million round led by Sequoia and BlackRock in September of that year. Francisco Partners led a $70 million round in May 2014, and Credit Suisse’s NEXT fund led a $165 million investment in April 2015. Prosper raised a further $50 million Series G round in 2017, led by the private-equity division of FinEX Asia. Legal matters remained part of Prosper’s corporate history. A class action filed in California in November 2008 alleged that Prosper had sold unqualified and unregistered securities to note purchasers between January 2006 and October 2008. The case also produced a dispute between Prosper and its insurer over defense costs. In December 2010, a California superior court judge issued a tentative ruling requiring the insurer to defend Prosper and reimburse certain litigation expenses, without deciding the underlying merits of the securities claims. Prosper ultimately settled the class action on July 19, 2013, for $10 million paid over three years. Prosper’s platform has focused primarily on consumer personal loans. The company has described uses including debt consolidation, home improvement, medical expenses, and other personal needs. It has also expanded into adjacent consumer-finance services, including a branded credit card, credit monitoring, and financial-planning tools. Prosper Funding LLC has been associated with servicing loans and managing borrower and investor relationships. The cited reference reports that Prosper has facilitated more than $23 billion in personal loans since inception, with loan amounts ranging from $2,000 to $50,000. The company attracted additional public attention in 2015 after the FBI reported that Syed Rizwan Farook had borrowed $28,500 through Prosper in connection with the acquisition of weapons and explosives used in the San Bernardino attack. The matter was reviewed by federal and California authorities, including the House Financial Services Committee and the California Department of Business Oversight, and the investigation concluded without action against Prosper. In April 2025, Prosper entered a $500 million forward-flow agreement with Fortress Investment Group and Edge Focus. The agreement was designed to provide committed capital for personal-loan originations and to increase the scale of Prosper’s institutional marketplace. In September 2025, Prosper announced that it had detected unauthorized access to its systems. A cybersecurity report identified millions of potentially affected email addresses and other personal and credit-related data, although Prosper stated that its own investigation had not confirmed the full scope of the reported exposure. Prosper continues to operate as a U.S.-focused online consumer-lending marketplace.
- 2025
Forward-flow capital agreement
[1]Prosper announces a $500 million forward-flow agreement with Fortress Investment Group and Edge Focus.
- 2013
Securities class action settled
[1]Prosper agrees to a $10 million settlement in a class action involving alleged unregistered securities offerings.
- 2010
Risk-based pricing adopted
[1]Prosper files a new prospectus describing rates set by the company through a borrower credit-risk formula.
- 2009
SEC-registered relaunch
[1]Prosper resumes lending after registering its notes with the SEC.
- 2008
SEC enforcement action
[1]The SEC determines that Prosper’s loan notes were securities offered in violation of federal securities law and issues a cease-and-desist order.
- 2006
Public platform launch
[1]Prosper opens its online lending marketplace to the public on February 5.
- 2005
Company founded
[1]Chris Larsen and John Witchel establish Prosper Marketplace.
Products and positioning
peer-to-peer lending platform
Consumer lending · 2006
Prosper personal loans
Prosper’s core offering is an online personal-loan marketplace. Consumers apply digitally, and eligible loans are funded through Prosper’s investor and institutional network. The cited reference gives a loan range of $2,000 to $50,000 and identifies uses such as debt consolidation, home improvement, medical expenses, and other personal needs.
Credit card · 2022
Prosper credit card
The Prosper credit card extends the brand beyond installment lending into revolving consumer credit. It is presented as part of Prosper’s broader consumer-finance offering. A 2022 Forbes review was critical of the product’s value proposition, but the available reference does not provide detailed terms or confirm its current availability.
Consumer-credit investment · 2006
Prosper investment marketplace
Prosper’s marketplace enables investors to obtain exposure to consumer-credit loans or notes, subject to securities rules and investor eligibility requirements. The investment side was central to the company’s original peer-to-peer model and later became integrated with institutional funding arrangements.
Financial wellness
Financial-planning and credit-monitoring tools
Prosper has offered tools intended to support consumers’ financial planning and credit monitoring. The cited material identifies these services but does not specify their complete feature set, pricing, or current product names.
Controversies
2025
Reported data breach
Prosper disclosed unauthorized access to its systems. A third-party cybersecurity report alleged exposure involving 17.6 million email addresses and other personal, address, identity, and credit-related data; Prosper said it had not validated the full claim while its investigation continued.
2015
Loan associated with San Bernardino attacker
Authorities investigated a report that Syed Rizwan Farook had borrowed $28,500 through Prosper to finance weapons and explosives connected with the San Bernardino attack. The investigation concluded without action against Prosper.
2008
SEC securities-law enforcement
The SEC found Prosper in violation of the Securities Act of 1933 over the offering of loan notes and issued a cease-and-desist order. The action contributed to the broader regulatory treatment of peer-to-peer lending notes as securities.
2008
Class action over unregistered securities
A California class action alleged that Prosper had sold unqualified and unregistered securities to note purchasers. The case was settled in 2013 for $10 million.
Brand decisions
2025
Secure forward-flow funding for personal loansStrategyBackground
Prosper sought additional dedicated capital to expand loan originations and strengthen institutional participation in its marketplace.
Action taken
Prosper entered a $500 million forward-flow agreement with Fortress Investment Group and Edge Focus.
Aftermath
The agreement was intended to support additional personal-loan originations, although the available material does not report realized volume or financial results.
Forward-flow funding commitment. $500 million agreement (Announced April 2025)
2010
Replace auction pricing with risk-based ratesOtherBackground
Prosper’s original platform used a variable-rate auction model in which lenders and borrowers influenced loan pricing.
Action taken
Prosper adopted a system in which it determined rates using a formula based on each prospective borrower’s credit risk.
Aftermath
The change standardized pricing and gave Prosper greater control over underwriting and marketplace execution.
2009
Reopen the marketplace after securities registrationStrategyBackground
Prosper had suspended lending after the SEC’s 2008 enforcement action concerning its loan notes.
Action taken
The company registered its notes with the SEC and relaunched lending, initially applying state-based restrictions to investor participation.
Aftermath
The relaunch allowed Prosper to continue operating within the securities-registration framework applied to peer-to-peer lending platforms.
Recent events
- 2025
Prosper enters $500 million forward-flow funding agreement[1]
M&A
Prosper entered an agreement with Fortress Investment Group and Edge Focus intended to provide dedicated capital for personal-loan originations and expand the company’s marketplace lending capacity.
- 2010
Prosper changes from auction pricing to risk-based rates[1]
Pricing · Regulation
The company filed a new SEC prospectus and shifted to rates determined by Prosper through a credit-risk formula rather than rates established through borrower and lender auctions.
- 2009
Prosper relaunches lending after SEC registration[1]
Regulation
Prosper reopened its lending and borrowing platform after registering its notes with the SEC. Investor participation was initially limited by state-level eligibility rules.
Sources3 sources
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