IEX Cloud (Discontinued) vs OANDA
Head-to-head market data API comparison. Updated 2026-05-24.
Overall winner: OANDA — wins 3 of 7 comparison axes.
Side-by-Side Comparison
| Feature | IEX Cloud (Discontinued) | OANDA |
|---|---|---|
| API Quality | 3/5 | 4/5 ✓ |
| Doc Quality | 3/5 | 4/5 ✓ |
| Data Latency | second | tick |
| SDK Languages | 5 languages ✓ | 3 languages |
| Free Tier | No | Yes ✓ |
| Affiliate Program | No | Yes |
| Asset Coverage Breadth | 5 asset classes ✓ | 4 asset classes |
| Asset Coverage | US Equities, US Options, Crypto, Forex, Commodities | Forex, CFDs, Commodities, Indices |
| Historical Depth | Service discontinued | 2001–present (FX tick and candle) |
| Starting Price | N/A | $0 |
| Rate Limits | Service discontinued | 120 req/sec on REST; no stated limit on streaming |
IEX Cloud (Discontinued): Best For
- Historical reference only
Not Ideal For
- Any new project — service is shut down
OANDA: Best For
- Forex algo traders
- FX backtesting (deep history)
- CFD automation
- EA developers
Not Ideal For
- Equities data
- Crypto beyond CFDs
- Non-FX asset classes
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