Finazon VS Polygon.io (now Massive)
Head-to-head market data API comparison.
UPDATED 2026-05-27 · 7 axes scored
WINNER · POLYGON.IO (NOW MASSIVE) · 3/7 AXES
Quick Decision
▶ PICK FINAZON IF DATA-API
- Budget-conscious devs needing tick data
- Modular data buyers
- Crypto + equities combo
▶ PICK POLYGON.IO (NOW MASSIVE) IF DATA-API
- Algo traders
- Fintech app developers
- Options traders
- Crypto quants
Side-by-Side Matrix
| METRIC | FINAZON | POLYGON.IO (NOW MASSIVE) |
|---|---|---|
| API Quality | 3/5 | 4/5 |
| Doc Quality | 3/5 | 4/5 |
| Data Latency | tick | tick |
| SDK Languages | 8 languages | 5 languages |
| Free Tier | Yes | Yes |
| Affiliate Program | No | No |
| Asset Coverage Breadth | 4 classes | 5 classes |
| Asset Coverage | US Equities · Forex · Crypto · US Options | US Equities · US Options · Forex · Crypto · Global Indices |
| Historical Depth | Varies by dataset; US equities tick from 2014 | 2003–present (equities) |
| Starting Price | From $5/mo | $0/mo |
| Rate Limits | Varies by plan and dataset subscription | Free: 5/min; Starter: 15/min; Developer+: unlimited |
Asset Class Coverage
Where the two providers overlap and where each has unique coverage.
| ASSET CLASS | FINAZON | POLYGON.IO (NOW MASSIVE) |
|---|---|---|
| Crypto | ✓ Covered | ✓ Covered |
| Forex | ✓ Covered | ✓ Covered |
| Global Indices | — | ✓ Covered |
| US Equities | ✓ Covered | ✓ Covered |
| US Options | ✓ Covered | ✓ Covered |
| TOTAL CLASSES | 4 | 5 |
Only Polygon.io (now Massive)
Global Indices
Shared · 4
US Equities · Forex · Crypto · US Options
Pricing Tier Map
Full tier ladder side-by-side · names and prices as published by each provider · 2 vs 4 tiers.
FINAZON · 2 TIERS FREE TIER
01
Pay-as-you-go From $5/mo
Subscribe to individual data bundles (e.g. Binance/Uniswap from $5; US Equities Basic, Forex, Crypto Consolidated from $19; SEC EDGAR from $29)
02
Pro Bundle $79/mo
US equities tick + options + WebSocket
▲ Free Tier · Free sandbox with limited records per endpoint
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
Technical Stack Fit
SDK languages and data formats determine integration cost for your existing codebase.
| DIMENSION | FINAZON | POLYGON.IO (NOW MASSIVE) |
|---|---|---|
| API Types | REST · WebSocket | REST · WebSocket · SDK |
| SDK Languages | Python · Java · C# · C++ · Go · PHP · Kotlin · JavaScript | Python · JavaScript · Go · Kotlin · Swift |
| Data Formats | JSON | JSON |
| Rate Limits | Varies by plan and dataset subscription | Free: 5/min; Starter: 15/min; Developer+: unlimited |
| Latency Class | tick | tick |
Fit Profile
FINAZON · PROFILE DATA-API
Best For
- Budget-conscious devs needing tick data
- Modular data buyers
- Crypto + equities combo
Not Ideal For
- Global exchange coverage
- Deep fundamentals
- Production HFT systems
Full Finazon Review
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
Adjacent Comparisons
Related matchups — same category first, then cross-category for context.
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