StoneCastle
StoneCastle operates an insured deposit platform enabling 100% FDIC insurance on balances up to $100 million across 1,000+ US banks. The company serves 2,500 institutional clients including Fortune 500 corporations, RIAs, and credit unions, having facilitated over $233 billion in cumulative deposits since inception.
- Company typePrivate
- Founded2009
- HeadquartersNew York, United States
- Headcount51–100
- GTM typeB2B
- OfferingServices
What StoneCastle does
StoneCastle Cash Management, LLC operates an insured deposit and institutional cash management platform that connects depositors (corporations, endowments, family offices, RIAs, and financial intermediaries) with over 1,000 FDIC-insured US depository institutions across all 50 states. Founded in 2009 as a subsidiary of StoneCastle Partners and headquartered in New York, StoneCastle enables depositors to achieve 100% federal deposit insurance on balances up to $100 million by distributing funds across its bank network through a proprietary, purpose-built technology platform operated by 40-60 specialized professionals. The platform has facilitated over $233 billion in cumulative client deposits since inception (as of 9/30/2025) and serves approximately 2,500 institutions, including 1,700+ Fortune 500 corporations, university endowments, foundations, and public funds seeking treasury cash diversification.
The core product portfolio spans Insured Deposits (the flagship offering with up to $100M FDIC coverage via spread-across-bank methodology), the Institutional Cash Account (ICA) for self-directed treasury placement, FICA (extended-FDIC insurance product launched in 2010), FICA for Advisors (2018) for wealth intermediaries, FICA Impact (2019) for mission-focused depositors, and KEEP by StoneCastle for RIAs. For depository institutions, StoneCastle provides stable, cost-efficient deposit funding as an alternative to branch deposits, plus credit union-specific solutions including Non-Member Deposit Funding and Balance Sheet/Liquidity Management. In December 2025, StoneCastle was acquired by Fiserv, Inc. (NASDAQ: FISV), and in February 2026 the combined entity launched INDX—a real-time cash settlement platform for digital asset companies offering up to $25 million in FDIC insurance coverage across an expanded network of 1,100+ banking members, accessible via conventional API.
StoneCastle's revenue model is primarily transaction-fee based: banks and credit unions pay fees for access to institutional deposit funding, while depositors receive competitive fully-insured yields above large-bank baselines. The company markets through industry conferences (ABA Annual Convention, AFP, RIA Edge, IMPACT, Future Proof), content/thought leadership, and direct enterprise sales to sophisticated institutional clients. StoneCastle is recognized as a Top 5 Best Place to Work in Financial Technology (2024) and Top 10 (2022), reflecting its positioning as a specialized, compliance-intensive fintech operating within a tightly regulated bank and credit union ecosystem.
StoneCastle firmographics
Firmographics- Name
- StoneCastle
- Legal name
- StoneCastle Cash Management, LLC
- Website
- https://stonecastle.com
- Company type
- Private
- Founded year
- 2009
- Operating status
- Acquired
- Headcount range
- 51–100 employees
- Short description
- StoneCastle operates an insured deposit platform enabling 100% FDIC insurance on balances up to $100 million across 1,000+ US banks. The company serves 2,500 institutional clients including Fortune 500 corporations, RIAs, and credit unions, having facilitated over $233 billion in cumulative deposits since inception.
- Ownership category
- akta.pro rank
StoneCastle industry classification
Industry- Product category
- Institutional Cash Management & Deposit Services
- NAICS
- Savings Institutions and Other Depository Credit Intermediation (522180)
- SIC
- Finance Services (6199), Functions Related To Depository Banking, Nec (6099)
- akta.pro primary industry
- B2B Crypto Payouts, Mass Payments & Treasury Disbursements (FSADAIAF)
Keywords
Where StoneCastle is headquartered
LocationHeadquarters
- HQ city
- New York
- HQ country
- United States
- HQ region
- North America
Offices1 record
Markets served
StoneCastle business model
Business model- GTM type
- B2B
- Offering type
- Services
- Cost components
- Personnel, Technology or R&D, Operations, Marketing or Sales, Others
Revenue model
- Deposit Funding Services: StoneCastle provides stable, cost-efficient deposit funding to banks in exchange for fees. Banks pay for access to institutional deposits as a cheaper alternative to traditional branch deposits. The company also earns fee income when credit unions send deposits off balance sheet while retaining the relationship.
- Insurance Coordination Services: Coordinates FDIC insurance coverage across multiple banks for depositors with large balances, enabling depositors to achieve 100% federal deposit insurance on amounts up to $100 million through spread-across-bank methodology.
Pricing tiers
| Model | Billing | Price |
|---|---|---|
| Other | Pay-as-you-go | Institutional Cash Account (ICA) - Self-directed deposit platform for large institutional depositors |
| Other | Pay-as-you-go | FICA (Federally Insured Cash Account) - Extended FDIC insurance product |
Go-to-market motion1 record
Distribution channels4 records
Marketing channels4 records
StoneCastle product offering
Product offeringCore offering
StoneCastle provides an insured deposit platform that coordinates millions of deposit transactions across a network of 1,000+ insured U.S. depository institutions, enabling institutional depositors to obtain 100% FDIC insurance coverage on balances up to $100 million. For banks and credit unions, it delivers stable, cost-efficient deposit funding as an alternative to branch deposits. The company also offers specialized cash solutions for wealth managers, RIAs, and corporations, and following its December 2025 acquisition by Fiserv, supports real-time cash settlement for digital asset firms.
Product overview
StoneCastle provides institutional-grade insured deposit and funding solutions through a platform architecture built around its core network of 1,000+ FDIC-insured depository institutions. The core offerings include Insured Deposits, the Institutional Cash Account (ICA), FICA products, and Enterprise Deposit Solutions for businesses. The product portfolio spans consumer-facing products (KEEP for RIAs), institutional solutions (ICA for treasurers), and B2B offerings (Enterprise Solutions for wealth managers and lenders). Credit Union Solutions include Non-Member Deposit Funding and Balance Sheet Management. Following the December 2025 acquisition by Fiserv, StoneCastle's capabilities enabled the launch of INDX, a real-time cash settlement platform for digital asset companies with programmatic API access. Together, these products processed over $233 billion in client deposits across 2,500+ institutional clients.
Differentiator
Problem solved
Functional benefit
Brands
- KEEP by StoneCastle: Purpose-built cash management solution for registered investment advisors (RIAs), powered by StoneCastle's network of over 1,000 banks, enabling RIAs to serve clients' insured cash needs with safety, yield, and community impact.
- FICA
- FICA Impact
- FICA for Advisors
- ICA (Institutional Cash Account)
- INDX
Products and services
- Insured Deposits FDIC-insured cash deposit solution providing 100% federal deposit insurance on balances up to $100 million by distributing deposits across a network of 1,000+ insured US depository institutions.
- Enterprise Deposit Solutions Platform enabling wealth managers, large real estate companies, and non-bank lenders to offer federally insured deposit accounts to their customers, with StoneCastle handling operations.
- Institutional Cash Account (ICA) Self-directed deposit platform connecting large institutional depositors with highly rated, money fund eligible banks. Provides same-day liquidity access and competitive rates through a single user-friendly portal.
- KEEP by StoneCastle Purpose-built cash management platform for registered investment advisors (RIAs), powered by StoneCastle's network of 1,000+ banks, enabling RIAs to serve clients' insured cash needs.
- FICA (Federally Insured Cash Account) Extended FDIC insurance product providing up to $100 million in federal insurance protection for credit union members and institutional investors.
- Credit Union Solutions Comprehensive deposit funding and balance sheet management solutions for credit unions, including non-member deposit funding and extended federal insurance up to $100 million for members.
- Deposit Funding Solutions for Banks Stable, cost-efficient insured deposit funding for banks of all sizes throughout the U.S., providing overnight and term deposit funding as an alternative to expensive branch deposits.
- INDX Real-Time Cash Settlement Platform Real-time cash settlement platform for digital asset companies enabling 24/7/365 USD storage and transfer with up to $25 million FDIC insurance coverage, distributed across Fiserv's network of 1,100+ insured financial institutions.
Quantifiable outcome
- $233 billion in client deposits facilitated since inception (as of 9/30/2025)
- +3 more outcomes
Companies that use StoneCastle
Customer profileNamed customers3 records
Segments8 records
Ideal customer profiles5 records
StoneCastle technology and API
TechnologyTechnology focussed Yes
API detail
- Has API
- Yes
- API docs
- API detail
Core technology
AI maturity
App detail
Feature5 records
StoneCastle partnerships and signals
Strategic signalScale indicators6 records
Recent moves8 records
Expansion highlights5 records
StoneCastle competitors and assessment
Company assessmentBroad incumbents
- Brex: Brex is a B2B financial platform offering corporate cards, bill pay, and FDIC-insured deposits to businesses, comparable to StoneCastle's enterprise cash management solutions but as a larger, broader fintech incumbent.
- Mercury: Mercury is a B2B banking platform offering business banking, treasury, and FDIC-insured deposits to startups and growing companies, comparable in serving business depositors but with a broader banking portfolio than StoneCastle's deposit-focused offering.
- Ramp: Ramp offers corporate cards, expense management, and treasury features including high-yield FDIC-insured deposits for businesses, competing in the broader B2B cash management space adjacent to StoneCastle's institutional offerings.
- Goldman Sachs Transaction Banking: Goldman Sachs Transaction Banking provides institutional cash management and deposits to large corporations and institutions, competing with StoneCastle's enterprise and institutional depositor offerings as a broader incumbent in treasury cash management.
- JPMorgan Payments / Cash Management: JPMorgan offers institutional cash management, treasury services, and deposits to corporations and institutional clients, competing as a large incumbent that StoneCastle positions itself against by offering higher rates with full FDIC insurance.
Others
- Treasury Prime: Treasury Prime is a banking-as-a-service platform that connects fintechs and banks through APIs, providing adjacent infrastructure for embedded banking and deposit products, comparable as an ecosystem enabler rather than direct competitor.
Emerging players
- DFX: DFX is a digital asset cash settlement platform serving crypto companies, similar in scope to StoneCastle's INDX platform, providing regulated USD banking infrastructure for digital asset firms.
- Modern Treasury: Modern Treasury provides treasury management infrastructure and bank integration tools for corporate treasurers and fintechs, serving a similar treasury professional customer base with adjacent (rather than directly competing) cash management functionality.
Direct peers
- Relay Financial: Relay Financial provides FDIC-insured deposit accounts through multi-bank networks for businesses, offering a similar B2B deposit network model targeting businesses and financial institutions, comparable to StoneCastle's ICA and Enterprise Solutions.
- IntraFi Network: IntraFi Network (formerly Promontory Interfinancial Network) operates CDARS, ICS, and other deposit sweep networks that distribute deposits across thousands of banks to provide FDIC insurance on large balances—the closest direct competitor to StoneCastle's core deposit aggregation model.
Market position
Strengths5 records
Weaknesses5 records
Competitive moat5 records
Key risks6 records
Key highlights7 records
Customer concentration
StoneCastle social profiles
Digital presenceStoneCastle financial estimates
Financial estimateRevenue estimate
Valuation estimate
StoneCastle leadership team
Management profileNumber of profiles
Profiles9 records
StoneCastle funding detail
Funding detailFunding overview
Funding rounds3 records
Investors2 records
Funding detail is available on the Subscription and Enterprise plan.Contact sales →
StoneCastle M&A and investment
M&A and investmentM&A2 records
Investments
M&A and investment is available on the Subscription and Enterprise plan.Contact sales →
Frequently asked questions about StoneCastle
What does StoneCastle do?
StoneCastle provides an insured deposit platform that coordinates millions of deposit transactions across a network of 1,000+ insured U.S. depository institutions, enabling institutional depositors to obtain 100% FDIC insurance coverage on balances up to $100 million. For banks and credit unions, it delivers stable, cost-efficient deposit funding as an alternative to branch deposits. The company also offers specialized cash solutions for wealth managers, RIAs, and corporations, and following its December 2025 acquisition by Fiserv, supports real-time cash settlement for digital asset firms.
Is StoneCastle a public or private company?
StoneCastle is a private company. It is classified as corporate owned and is currently acquired.
When was StoneCastle founded?
StoneCastle was founded in 2009. It employs 51 to 100 people.
Where is StoneCastle based?
StoneCastle is headquartered in New York, United States, in the North America region.
How does StoneCastle make money?
Two revenue lines are on record. Deposit Funding Services are the primary driver. The others are insurance Coordination Services.
Who are StoneCastle's main competitors?
Broad incumbents on record are Brex, Mercury, Ramp, Goldman Sachs Transaction Banking and JPMorgan Payments / Cash Management. Treasury Prime is listed as an others. Emerging players are DFX and Modern Treasury. Direct peers are Relay Financial and IntraFi Network.
Does StoneCastle have an API?
Yes. INDX platform supports a conventional API (not blockchain-based) for digital asset companies to access programmable, real-time cash settlement capabilities 24/7/365. The API enables digital asset firms to securely store and transfer US dollars through the Fiserv Deposit Network.
What industry is StoneCastle in?
StoneCastle's product category is Institutional Cash Management & Deposit Services. Its primary akta.pro industry code is FSADAIAF, B2B Crypto Payouts, Mass Payments & Treasury Disbursements. Its NAICS code is 522180 and its SIC code is 6199.