IEX Cloud (Discontinued) vs Tradier
Head-to-head market data API comparison. Updated 2026-05-24.
Overall winner: Tradier — wins 3 of 7 comparison axes.
Side-by-Side Comparison
| Feature | IEX Cloud (Discontinued) | Tradier |
|---|---|---|
| API Quality | 3/5 | 4/5 ✓ |
| Doc Quality | 3/5 | 4/5 ✓ |
| Data Latency | second | second |
| SDK Languages | 5 languages ✓ | 3 languages |
| Free Tier | No | Yes ✓ |
| Affiliate Program | No | Yes |
| Asset Coverage Breadth | 5 asset classes ✓ | 3 asset classes |
| Asset Coverage | US Equities, US Options, Crypto, Forex, Commodities | US Equities, US Options, ETFs |
| Historical Depth | Service discontinued | 10+ years (daily OHLCV); 1-min intraday on paid |
| Starting Price | N/A | $0/mo |
| Rate Limits | Service discontinued | Generous; no published hard limits on Developer plan |
IEX Cloud (Discontinued): Best For
- Historical reference only
Not Ideal For
- Any new project — service is shut down
Tradier: Best For
- US options traders
- Retail algo traders
- Commission-free trading bots
- Options analytics apps
Not Ideal For
- International markets
- Crypto
- Futures
- Non-US exchanges
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