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Measured on six things

Real-time & historical market data API for stocks, forex,...

Growth

Unified multi-asset API with one schema is a clear differentiator. Targets developers and fintech with a real pain point. Education program adds reach. But crowded market with strong incumbents limits upside.

Screenshots

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SiftingIO - Market Data API

About this app

SiftingIO is a unified market data API that provides real-time and historical data across stocks, forex, crypto, commodities, DEX, and on-chain markets. With one API key and a consistent JSON schema, developers can access quotes, trades, OHLCV bars, and fundamentals via REST and WebSocket, with sub-100ms latency and a 99.9% SLA. It's designed for trading platforms, fintech apps, research tools, and AI agents.

Key features

1Unified multi-asset API: stocks, forex, crypto, commodities, DEX, on-chain with one schema.
2REST + WebSocket with sub-100ms latency and 99.9% SLA.
3Comprehensive docs with 37 endpoints, Try-it runner, and SDKs for Go, Python, JavaScript.

Target customer profile

Drawn from the product itself, not from a survey.

Demographic

Developers and quantitative analysts

Pain points

Need multiple data sources for different asset classes, high latency, inconsistent schemas

Primary needs

Single API for real-time and historical data, low latency, normalized data

Demographic

Fintech and trading platform startups

Pain points

High cost and complexity of integrating with many data providers, scalability issues

Primary needs

Affordable, scalable, multi-asset data feed with reliable uptime

Demographic

Researchers and educators

Pain points

Access to market data is expensive, difficult to obtain for academic purposes

Primary needs

Free or discounted data access for research and education, easy-to-use API

Scout Review

Written by AI from measured evidence, scored out of 100.

SiftingIO is a well-executed market data API with a strong developer experience. The design is clean and functional, performance is top-notch, and the docs are comprehensive. Security is solid but lacks enterprise certifications. Accessibility is good with minor contrast issues. Growth potential is real, but competition is fierce. Overall, a competent product that could carve a niche with its multi-asset unified schema, but needs to prove itself against incumbents.

Measure by measure

Usability

Docs are thorough with 37 endpoints, each with Try-it runner. Quickstart promises key verification in under a minute. Pricing is clear with tiered plans and bundle builder. Strong developer onboarding.

Design

Clean, developer-focused design with consistent yellow accent and clear hierarchy. Live code blocks and SDK tabs are strong. Floating price circles add noise, and the maker media dark hero feels out of place.

Speed

Lighthouse mobile performance 98/100, desktop 100/100. LCP 2.4s, CLS 0, TBT 0ms. Site is lightweight and snappy, no performance issues found.

Security

Strong HTTP security headers (HSTS, CSP, frame protection, etc.) and SPF/DMARC. No SOC 2 or ISO certification mentioned, no security page or bug bounty found. Solid baseline but not enterprise-grade proof.

Accessibility

Lighthouse accessibility 97/100, only failing contrast ratio. No explicit WCAG statement or accessibility page. Site is responsive and keyboard-navigable, but multi-language support not mentioned.

Growth

Improvement areas

No SOC 2 or ISO certification mentioned, which may deter enterprise clients.
Accessibility contrast ratio fails on some elements; no explicit WCAG statement.
Pricing page is complex with multiple markets and tiers; could benefit from simplification.

Design & Usability

SiftingIO presents a polished, developer-centric design with a consistent yellow accent and clear hierarchy. The homepage effectively showcases live code examples and SDK tabs, making it immediately clear what the product offers. Usability is strong with comprehensive docs (37 endpoints, Try-it runner) and a quickstart that delivers on its promise. The pricing page, while complex with multiple markets and tiers, is well-structured with a bundle builder. Minor design issues like floating price circles and a mismatched dark hero don't detract much from the overall positive experience.

Speed & Security

Performance is exceptional: Lighthouse scores of 98/100 mobile and 100/100 desktop, with LCP 2.4s and zero layout shift. The site feels instant. Security is solid with all major HTTP security headers present and SPF/DMARC configured. However, there's no SOC 2 or ISO certification mentioned, and no dedicated security page or bug bounty program. For a financial data API, this might be a gap for enterprise customers, but for early-stage adoption, the baseline is strong.

Accessibility & Growth

Accessibility is strong with a 97/100 Lighthouse score, only failing on contrast ratio. No explicit WCAG statement, but the site is responsive and keyboard-navigable. Growth potential is promising: the unified multi-asset API with one schema addresses a real pain point for developers. The education program and free tier lower barriers. However, the market is crowded with established players like Polygon.io and Alpha Vantage, so differentiation hinges on execution and developer experience. The idea is solid, but the wedge is not unique enough to guarantee breakout success.

Conclusion

If you're a developer tired of stitching together multiple data providers, SiftingIO is worth a look. The free tier lets you test the waters without a credit card. The one-schema approach could save you weeks of integration work. Just keep an eye on how it scales and whether the SLA holds up. For now, it's a promising underdog in a crowded field.

Suggestions for improvement

Add SOC 2 or ISO 27001 certification to build trust with enterprise clients.
Publish a dedicated security page with data handling and incident response details.
Improve contrast ratio on specific elements to pass all accessibility audits.
Consider adding a public roadmap or changelog to show product momentum.

How we score

Alternatives comparison

Named competitors, point by point. Nobody paid to appear here or to be left out.

	SiftingIO - Market Data API	Polygon.io	Alpha Vantage	Finnhub
Multi-asset coverage	Stocks, forex, crypto, commodities, DEX, on-chain	Stocks, forex, crypto, options	Stocks, forex, crypto, commodities	Stocks, forex, crypto
Unified schema	One consistent JSON schema across all markets	Consistent but separate endpoints per asset	Different schemas per endpoint	Different schemas per endpoint
Free tier	Free tier with 10k REST calls/month, no card	Free tier with 5 calls/min, limited data	Free tier with 25 requests/day	Free tier with 60 calls/min
WebSocket support	Yes, with real-time ticks	Yes, with real-time ticks	No WebSocket support	Yes, with real-time ticks
Historical depth	Up to full historical depth on Pro tier	Full historical depth on paid plans	20+ years on some endpoints	Up to 30 years on paid plans