Polygon.io (now Massive) VS Tradier
Head-to-head market data API comparison.
UPDATED 2026-05-27 · 7 axes scored
WINNER · POLYGON.IO (NOW MASSIVE) · 1/7 AXES
Quick Decision
▶ PICK POLYGON.IO (NOW MASSIVE) IF DATA-API
- Algo traders
- Fintech app developers
- Options traders
- Crypto quants
▶ PICK TRADIER IF DATA-API
- US options traders
- Retail algo traders
- Commission-free trading bots
- Options analytics apps
Side-by-Side Matrix
| METRIC | POLYGON.IO (NOW MASSIVE) | TRADIER |
|---|---|---|
| API Quality | 4/5 | 4/5 |
| Doc Quality | 4/5 | 4/5 |
| Data Latency | tick | second |
| SDK Languages | 5 languages | 3 languages |
| Free Tier | Yes | Yes |
| Affiliate Program | No | Yes |
| Asset Coverage Breadth | 5 classes | 5 classes |
| Asset Coverage | US Equities · US Options · Forex · Crypto · Global Indices | US Equities · US Options · ETFs · Futures · Micro Futures |
| Historical Depth | 2003–present (equities) | 10+ years (daily OHLCV); 1-min intraday on paid |
| Starting Price | $0/mo | $0/mo |
| Rate Limits | Free: 5/min; Starter: 15/min; Developer+: unlimited | Generous; no published hard limits on Developer plan |
Asset Class Coverage
Where the two providers overlap and where each has unique coverage.
| ASSET CLASS | POLYGON.IO (NOW MASSIVE) | TRADIER |
|---|---|---|
| Crypto | ✓ Covered | — |
| ETFs | — | ✓ Covered |
| Forex | ✓ Covered | — |
| Futures | — | ✓ Covered |
| Global Indices | ✓ Covered | — |
| Micro Futures | — | ✓ Covered |
| US Equities | ✓ Covered | ✓ Covered |
| US Options | ✓ Covered | ✓ Covered |
| TOTAL CLASSES | 5 | 5 |
Only Polygon.io (now Massive)
Forex · Crypto · Global Indices
Only Tradier
ETFs · Futures · Micro Futures
Shared · 2
US Equities · US Options
Pricing Tier Map
Full tier ladder side-by-side · names and prices as published by each provider · 4 vs 3 tiers.
POLYGON.IO (NOW MASSIVE) · 4 TIERS FREE TIER
01
Stocks Basic $0/mo
EOD data, 5 calls/min
02
Stocks Starter $29/mo
15-min delayed data
03
Stocks Developer $79/mo
15-min delayed data, unlimited calls
04
Stocks Advanced $199/mo
Real-time data, WebSocket, full history
▲ Free Tier · Free tier (Stocks Basic): 5 API calls/min, EOD data only, no real-time
TRADIER · 3 TIERS FREE TIER
01
Lite $0/mo
$0.35/trade stocks & options; $0.75/contract micro futures; no desktop app
02
Pro $10/mo
Commission-free stocks & equity/ETF options; $0.35 index options; $0.35/contract micro futures; full platform access
03
Pro Plus $35/mo
Commission-free stocks & equity/ETF options; $0.10 index options; $0.25/contract micro futures; full platform access
▲ Free Tier · Free sandbox: full API access on paper trading account
Technical Stack Fit
SDK languages and data formats determine integration cost for your existing codebase.
| DIMENSION | POLYGON.IO (NOW MASSIVE) | TRADIER |
|---|---|---|
| API Types | REST · WebSocket · SDK | REST · WebSocket |
| SDK Languages | Python · JavaScript · Go · Kotlin · Swift | Python · JavaScript · Ruby |
| Data Formats | JSON | JSON · XML |
| Rate Limits | Free: 5/min; Starter: 15/min; Developer+: unlimited | Generous; no published hard limits on Developer plan |
| Latency Class | tick | second |
Fit Profile
POLYGON.IO (NOW MASSIVE) · PROFILE DATA-API
Best For
- Algo traders
- Fintech app developers
- Options traders
- Crypto quants
Not Ideal For
- Tick-level HFT (DBZ format not available)
- Institutional order book depth
Full Polygon.io (now Massive) Review
TRADIER · PROFILE DATA-API
Best For
- US options traders
- Retail algo traders
- Commission-free trading bots
- Options analytics apps
Not Ideal For
- International markets
- Crypto
- Non-US exchanges
Full Tradier Review
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