TRADINGDATACOMPARE
LIVE · 2026-05-27

Alpha Vantage VS Polygon.io (now Massive)

Head-to-head market data API comparison.
UPDATED 2026-05-27 · 7 axes scored

WINNER · POLYGON.IO (NOW MASSIVE) · 2/7 AXES

Quick Decision

▶ PICK ALPHA VANTAGE IF DATA-API
  • Beginners
  • Homework / hobby projects
  • Technical indicator data
  • Fundamentals screening
▶ PICK POLYGON.IO (NOW MASSIVE) IF DATA-API
  • Algo traders
  • Fintech app developers
  • Options traders
  • Crypto quants

Side-by-Side Matrix

METRIC ALPHA VANTAGE POLYGON.IO (NOW MASSIVE)
API Quality 3/5 4/5
Doc Quality 3/5 4/5
Data Latency minute tick
SDK Languages 5 languages 5 languages
Free Tier Yes Yes
Affiliate Program No No
Asset Coverage Breadth 5 classes 5 classes
Asset Coverage
US Equities · Global Equities · Forex · Crypto · Commodities
US Equities · US Options · Forex · Crypto · Global Indices
Historical Depth 20+ years (daily); intraday 1-2 months on free 2003–present (equities)
Starting Price $0/mo $0/mo
Rate Limits Free: 25/day; paid plans from 75/min up to 1200/min Free: 5/min; Starter: 15/min; Developer+: unlimited

Asset Class Coverage

Where the two providers overlap and where each has unique coverage.

ASSET CLASS ALPHA VANTAGE POLYGON.IO (NOW MASSIVE)
Commodities ✓ Covered
Crypto ✓ Covered ✓ Covered
Forex ✓ Covered ✓ Covered
Global Equities ✓ Covered
Global Indices ✓ Covered
US Equities ✓ Covered ✓ Covered
US Options ✓ Covered
TOTAL CLASSES 5 5
Only Alpha Vantage
Global Equities · Commodities
Only Polygon.io (now Massive)
US Options · Global Indices
Shared · 3
US Equities · Forex · Crypto

Pricing Tier Map

Full tier ladder side-by-side · names and prices as published by each provider · 6 vs 4 tiers.

ALPHA VANTAGE · 6 TIERS FREE TIER
01
Free $0/mo
25 req/day, no real-time
02
75 req/min $49.99/mo
75 requests/min, no daily limits
03
150 req/min $99.99/mo
150 requests/min, no daily limits
04
300 req/min $149.99/mo
300 requests/min, no daily limits
05
600 req/min $199.99/mo
600 requests/min, no daily limits
06
1200 req/min $249.99/mo
1200 requests/min, no daily limits
▲ Free Tier · Free: 25 API requests/day, no real-time
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 ALPHA VANTAGE POLYGON.IO (NOW MASSIVE)
API Types REST REST · WebSocket · SDK
SDK Languages Python · JavaScript · Java · PHP · C# Python · JavaScript · Go · Kotlin · Swift
Data Formats JSON · CSV JSON
Rate Limits Free: 25/day; paid plans from 75/min up to 1200/min Free: 5/min; Starter: 15/min; Developer+: unlimited
Latency Class minute tick

Fit Profile

ALPHA VANTAGE · PROFILE DATA-API

Best For

  • Beginners
  • Homework / hobby projects
  • Technical indicator data
  • Fundamentals screening

Not Ideal For

  • Production trading systems
  • Real-time needs on free tier
  • Tick data

Full Alpha Vantage 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.

More Routes