# Alpha Vantage vs Massive (Polygon) (2026)

> Alpha Vantage vs Massive (Polygon): assets, live vs paper, order approval and safety controls, pricing and rate limits, each with a source.

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# Alpha Vantage vs Massive (Polygon)

By [Ahsen (@satovinci)](https://tradingagentstack.com/about/)

Side-by-side facts with sources, last checked 2026-11-09.

**Verdict:** Alpha Vantage: free key: 25 requests/day for most endpoints. Massive (Polygon): free tier: end-of-day data, 5 req/min, no card. Safety score: Alpha Vantage 90%, Massive (Polygon) 90%. They differ on assets, pricing, rate limits; the table below shows each fact with its source.

| Field | [Alpha Vantage API](https://tradingagentstack.com/tool/alpha-vantage-api/) | [Massive (Polygon) API](https://tradingagentstack.com/tool/massive-polygon-api/) |
| --- | --- | --- |
| Category | Market data APIs | Market data APIs |
| Assets | stocks, ETFs, mutual funds, indices, options, forex, commodities, economic indicators, news & sentiment | stocks, options, indices, forex, futures |
| Live vs paper | data only | data only |
| Order approval / safety | n/a | n/a |
| Pricing / free tier | free key: 25 requests/day for most endpoints; premium $49.99/mo (75 req/min) to $249.99/mo (1,200 req/min) | free tier: end-of-day data, 5 req/min, no card; Stocks Starter $29/mo (15-min delayed, includes full-market snapshot); Developer $79/mo (15-min delayed); Advanced $199/mo (real-time) |
| Rate limits | free 25 requests/day; premium 75–1,200 requests/min | free: 5 API calls/min; paid plans: unlimited API calls |
| Official / community | official | official |
| Last checked | 2026-11-09 | 2026-11-09 |
| Source | [www.alphavantage.co](https://www.alphavantage.co/premium/) | [massive.com](https://massive.com/stocks) |
| Website | [Visit Alpha Vantage API](https://tradingagentstack.com/go/alpha-vantage-api/?from=/compare/alpha-vantage-vs-massive/) | [Visit Massive (Polygon) API](https://tradingagentstack.com/go/massive-polygon-api/?from=/compare/alpha-vantage-vs-massive/) |

Both are listed under [Market data APIs](https://tradingagentstack.com/category/data-api/), where every tool in the category is shown with the same sourced facts.

Tool pages: [Alpha Vantage API](https://tradingagentstack.com/tool/alpha-vantage-api/) · [Massive (Polygon) API](https://tradingagentstack.com/tool/massive-polygon-api/). Categories: [Market data APIs](https://tradingagentstack.com/category/data-api/)

## Related

- [Market data APIs: every tool on the same facts](https://tradingagentstack.com/category/data-api/)

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- [ThetaData vs Massive (Polygon)](https://tradingagentstack.com/compare/thetadata-vs-massive/)

- [Databento vs Alpha Vantage](https://tradingagentstack.com/compare/databento-vs-alpha-vantage/)

- [All comparisons](https://tradingagentstack.com/compare/)

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