
Twelve Data
Alpha Vantage
Polygon.io
FinFeedAPI
Finage
Financial Modeling Prep
FinancialData.net
SiftingIO provides real-time and historical market data APIs for stocks, FX, crypto, commodities, DEX, and on-chain markets through REST and WebSocket.

StackSource
AI-native commercial mortgage brokerage. One submission, lender matching, and human support through closing. No upfront fees.

Which is more popular?
Website, pricing, platforms and company facts side by side.
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| Website | sifting.io | yieldstack.ai |
| Pricing | ||
| Platforms | — | |
| Company | 10 - 19 employees · 2025 | Startup from the United States · 1 - 9 employees · 2025 |
| Listed in |
In their own words, as submitted to SaaSHub.


SiftingIO provides real-time and historical market data for US stocks, forex, commodities, crypto and on-chain markets. Live prices are available through REST and WebSocket; historical OHLCV is available through REST. The product range includes market prices, last trades and quotes, stock...
YieldStack helps real estate investors, developers, and brokers find commercial mortgage financing from third-party lenders. Borrowers submit a financing request through one platform. AI supports deal preparation and lender-program matching, while YieldStack’s brokerage team helps compare offers,...
What each product offers, as listed by its team.


An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
Overall verdict
Why this product is good
Recommended for
How often each product is chosen within a category, 0–100% relative to the other.


As answered by people managing SiftingIO and YieldStack.
SiftingIO's answer
SiftingIO does not publicly list customer names unless they are approved for disclosure.
The platform is designed for financial applications, trading tools, dashboards, research platforms, quantitative teams, fintech companies, and enterprise data workflows that need real-time or historical market data through APIs.
YieldStack's answer:
The largest CRE Lenders in the USA
SiftingIO's answer
SiftingIO is built on a modern API and data infrastructure for real-time and historical market data delivery.
The platform uses technologies and engineering patterns around:
The focus is on building a reliable data infrastructure that can serve financial applications, dashboards, trading tools, research systems, and enterprise workflows.
YieldStack's answer:
AI integrations supporting the platform’s workflows.
SiftingIO's answer
SiftingIO is built around a simple idea: market data should be easier to integrate, but not simplified to the point where it becomes unreliable.
The platform combines real-time and historical data across multiple asset classes under one API structure. Teams can work with stocks, FX, crypto, commodities, DEX, and on-chain markets without maintaining separate schemas, authentication models, and integration logic for each source.
What makes SiftingIO different is the engineering layer behind the API:
This makes SiftingIO useful for teams that care not only about accessing data, but also about keeping their data infrastructure clean and scalable.
YieldStack's answer:
YieldStack combines AI-assisted lender matching with hands-on commercial mortgage brokerage. Borrowers submit once, compare financing options, and work with a team that handles structuring, negotiation, and closing coordination. Borrowers approve lender outreach, with no upfront fees and a broker fee paid only at closing.
SiftingIO's answer
SiftingIO is a strong choice for teams that need market data across more than one asset class and want to avoid maintaining multiple vendor integrations.
Many financial applications start with one market, then expand into others. A team may begin with FX or crypto, then later need stocks, commodities, DEX data, or on-chain metrics. SiftingIO is designed for that kind of growth.
Key reasons to choose SiftingIO:
The main value is not only data access. It is reducing the engineering cost of using market data across financial products.
YieldStack's answer:
YieldStack helps borrowers evaluate the whole financing offer: rate, leverage, fees, reserves, prepayment terms, and closing requirements. Its platform organizes the process, while its brokerage team helps borrowers find suitable lenders and move the deal forward. One submission gives borrowers a coordinated financing process without an upfront brokerage fee.
SiftingIO's answer
SiftingIO is built for technical and data-driven teams working with financial market data.
The primary audience includes:
SiftingIO is especially useful for teams that need both real-time and historical data, or teams that work across multiple asset classes and want a consistent API model instead of separate vendor-specific integrations.
YieldStack's answer:
Commercial real estate investors, developers, operators, and mortgage brokers seeking bridge, DSCR, fix-and-flip, construction, multifamily, and permanent financing across the United States.
SiftingIO's answer
SiftingIO was created from hands-on experience building and operating financial data infrastructure.
Market data integrations often become more complex as products grow. Each asset class can come with different data formats, different delivery methods, different authentication models, and different assumptions about symbols, timestamps, quotes, trades, and history.
SiftingIO was built to reduce that complexity.
The goal is to provide a consistent market data API that helps teams access real-time and historical data across multiple asset classes without rebuilding their integration every time they add a new market.
The product reflects an engineering-first approach: clean API design, unified schemas, REST and WebSocket support, multi-venue aggregation, and infrastructure that can support production financial workflows.
YieldStack's answer:
Rommin Adl and Daniel Chesney founded YieldStack to simplify commercial real estate financing. The platform brings deal preparation, lender matching, offer comparison, and closing coordination into one workflow, combining AI-assisted analysis with human brokerage expertise.
Share your experience with using SiftingIO and YieldStack. For example, how are they different and which one is better?
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