IEX Cloud (Discontinued) VS Twelve Data
Head-to-head market data API comparison.
UPDATED 2026-05-24 · 7 axes scored
WINNER · TWELVE DATA · 4/7 AXES
Quick Decision
▶ PICK IEX CLOUD (DISCONTINUED) IF DATA-API
- Historical reference only
▶ PICK TWELVE DATA IF DATA-API
- Global coverage needs
- Technical indicator API
- Fintech apps
- Forex + crypto combo
Side-by-Side Matrix
| METRIC | IEX CLOUD (DISCONTINUED) | TWELVE DATA |
|---|---|---|
| API Quality | 3/5 | 4/5 |
| Doc Quality | 3/5 | 4/5 |
| Data Latency | second | second |
| SDK Languages | 5 languages | 5 languages |
| Free Tier | No | Yes |
| Affiliate Program | No | Yes |
| Asset Coverage Breadth | 5 classes | 6 classes |
| Asset Coverage | US Equities · US Options · Crypto · Forex · Commodities | US Equities · Global Equities · Forex · Crypto · ETFs · Indices |
| Historical Depth | Service discontinued | 30+ years (daily); intraday varies by plan |
| Starting Price | N/A | $0/mo |
| Rate Limits | Service discontinued | Credit-based; each endpoint consumes different credit amount |
Asset Class Coverage
Where the two providers overlap and where each has unique coverage.
| ASSET CLASS | IEX CLOUD (DISCONTINUED) | TWELVE DATA |
|---|---|---|
| Commodities | ✓ Covered | — |
| Crypto | ✓ Covered | ✓ Covered |
| ETFs | — | ✓ Covered |
| Forex | ✓ Covered | ✓ Covered |
| Global Equities | — | ✓ Covered |
| Indices | — | ✓ Covered |
| US Equities | ✓ Covered | ✓ Covered |
| US Options | ✓ Covered | — |
| TOTAL CLASSES | 5 | 6 |
Only IEX Cloud (Discontinued)
US Options · Commodities
Only Twelve Data
Global Equities · ETFs · Indices
Shared · 3
US Equities · Crypto · Forex
Pricing Tier Map
Full tier ladder side-by-side · names and prices as published by each provider · 1 vs 4 tiers.
IEX CLOUD (DISCONTINUED) · 1 TIERS
01
Discontinued N/A
IEX Cloud shut down on August 31, 2024
TWELVE DATA · 4 TIERS FREE TIER
01
Basic (Free) $0/mo
800 API credits/day, 8 WebSocket trial credits, 3 markets
02
Grow $79/mo
Real-time US stocks/commodities/fundamentals, 20+ markets ($66/mo annual)
03
Pro $229/mo
EU real-time, fixed income, mutual funds, 70+ markets ($191/mo annual)
04
Ultra $999/mo
99.95% SLA, dedicated support, 84 markets ($832/mo annual)
▲ Free Tier · Free: 800 API credits/day, 8 WebSocket connections
Technical Stack Fit
SDK languages and data formats determine integration cost for your existing codebase.
| DIMENSION | IEX CLOUD (DISCONTINUED) | TWELVE DATA |
|---|---|---|
| API Types | REST · WebSocket · SDK | REST · WebSocket |
| SDK Languages | Python · JavaScript · Java · Go · Ruby | Python · JavaScript · Java · PHP · R |
| Data Formats | JSON | JSON · CSV |
| Rate Limits | Service discontinued | Credit-based; each endpoint consumes different credit amount |
| Latency Class | second | second |
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
TWELVE DATA · PROFILE DATA-API
Best For
- Global coverage needs
- Technical indicator API
- Fintech apps
- Forex + crypto combo
Not Ideal For
- Tick data / HFT
- Deep US options data
- Large bulk downloads
Full Twelve Data Review
Adjacent Comparisons
Related matchups — same category first, then cross-category for context.
IEX Cloud (Discontinued) vs DatabentoTwelve Data vs DatabentoIEX Cloud (Discontinued) vs Polygon.io (now Massive)Twelve Data vs Polygon.io (now Massive)IEX Cloud (Discontinued) vs AlpacaTwelve Data vs AlpacaIEX Cloud (Discontinued) vs FinnhubTwelve Data vs FinnhubIEX Cloud (Discontinued) vs Alpha VantageTwelve Data vs Alpha VantageIEX Cloud (Discontinued) vs EODHD (EOD Historical Data)Twelve Data vs EODHD (EOD Historical Data)IEX Cloud (Discontinued) vs FinazonTwelve Data vs FinazonIEX Cloud (Discontinued) vs OANDATwelve Data vs OANDA