IEX Cloud (Discontinued) VS Nasdaq Data Link
Head-to-head market data API comparison.
UPDATED 2026-05-24 · 7 axes scored
WINNER · NASDAQ DATA LINK · 3/7 AXES
Quick Decision
▶ PICK IEX CLOUD (DISCONTINUED) IF DATA-API
- Historical reference only
▶ PICK NASDAQ DATA LINK IF DATA-API
- Quant researchers
- Alternative data buyers
- Macro/fundamental analysts
- Academic researchers
Side-by-Side Matrix
| METRIC | IEX CLOUD (DISCONTINUED) | NASDAQ DATA LINK |
|---|---|---|
| API Quality | 3/5 | 3/5 |
| Doc Quality | 3/5 | 4/5 |
| Data Latency | second | daily |
| SDK Languages | 5 languages | 5 languages |
| Free Tier | No | Yes |
| Affiliate Program | No | No |
| Asset Coverage Breadth | 5 classes | 6 classes |
| Asset Coverage | US Equities · US Options · Crypto · Forex · Commodities | US Equities · Global Equities · Futures · Forex · Commodities · Alternative Data |
| Historical Depth | Service discontinued | 50+ years on select datasets; varies widely |
| Starting Price | N/A | $0/mo |
| Rate Limits | Service discontinued | Anonymous: 20 calls/10min, 50/day; Free w/ API key: 300/10s, 2,000/10min, 50,000/day; Premium: higher limits per dataset |
Asset Class Coverage
Where the two providers overlap and where each has unique coverage.
| ASSET CLASS | IEX CLOUD (DISCONTINUED) | NASDAQ DATA LINK |
|---|---|---|
| Alternative Data | — | ✓ Covered |
| Commodities | ✓ Covered | ✓ Covered |
| Crypto | ✓ Covered | — |
| Forex | ✓ Covered | ✓ Covered |
| Futures | — | ✓ Covered |
| Global Equities | — | ✓ Covered |
| US Equities | ✓ Covered | ✓ Covered |
| US Options | ✓ Covered | — |
| TOTAL CLASSES | 5 | 6 |
Only IEX Cloud (Discontinued)
US Options · Crypto
Only Nasdaq Data Link
Global Equities · Futures · Alternative Data
Shared · 3
US Equities · Forex · Commodities
Pricing Tier Map
Full tier ladder side-by-side · names and prices as published by each provider · 1 vs 2 tiers.
IEX CLOUD (DISCONTINUED) · 1 TIERS
01
Discontinued N/A
IEX Cloud shut down on August 31, 2024
NASDAQ DATA LINK · 2 TIERS FREE TIER
01
Free $0/mo
Open datasets, limited premium access
02
Premium Custom
Institutional datasets, alternative data, bulk downloads
▲ Free Tier · Free: select open datasets; core financial data free with registration
Technical Stack Fit
SDK languages and data formats determine integration cost for your existing codebase.
| DIMENSION | IEX CLOUD (DISCONTINUED) | NASDAQ DATA LINK |
|---|---|---|
| API Types | REST · WebSocket · SDK | REST · SDK |
| SDK Languages | Python · JavaScript · Java · Go · Ruby | Python · R · JavaScript · Ruby · Excel |
| Data Formats | JSON | JSON · CSV · Excel |
| Rate Limits | Service discontinued | Anonymous: 20 calls/10min, 50/day; Free w/ API key: 300/10s, 2,000/10min, 50,000/day; Premium: higher limits per dataset |
| Latency Class | second | daily |
Fit Profile
IEX CLOUD (DISCONTINUED) · PROFILE DATA-API
Best For
- Historical reference only
Not Ideal For
- Any new project — service is shut down
Full IEX Cloud (Discontinued) Review
NASDAQ DATA LINK · PROFILE DATA-API
Best For
- Quant researchers
- Alternative data buyers
- Macro/fundamental analysts
- Academic researchers
Not Ideal For
- Real-time trading systems
- Tick data / HFT
- Crypto
- Intraday strategies
Full Nasdaq Data Link Review
Adjacent Comparisons
Related matchups — same category first, then cross-category for context.
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