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Alpaca is a hosted trading and embedded-brokerage API. Replacing it depends on what you need to change: brokerage access, options workflows, market data, or all three. Tradier and SnapTrade are the brokerage-oriented candidates here; Polygon.io, Alpha Vantage, Financial Modeling Prep and Finnhub focus on data. Their starting prices are not directly comparable, and a data API is not a drop-in replacement for order execution. Keep those boundaries explicit in your integration.
01Why people leave Alpaca
Data access changed or costs more
Reddit users report changes to Alpaca’s data feed, throttling and higher costs for similar data; some use other sources for market data.
Execution and crypto concerns
One Reddit commenter advises trading crypto directly on exchanges; another says Alpaca fills may be weaker than Interactive Brokers.
You need options or another API shape
A Reddit user describes Tradier and Alpaca as having straightforward REST APIs and sandboxes, but says Tradier offers options while Alpaca offers crypto.
02The alternatives, ranked by fit
- Options brokerage
TradierTradierTradier is the closest brokerage-oriented alternative for developers who need options: a Reddit user describes its REST API and sandbox as straightforward, and says it offers options but not crypto. The listed starting price is $10, with a free plan. Treat it as a brokerage migration, not a data-feed replacement; map order behavior and market data separately before switching.
Trade-off: It does not offer crypto, and execution and rate limits need verification.
6.6/10from
$10/mofree plan - Brokerage aggregation
SnapTradeSnapTradeSnapTrade is a fit for investment apps that need a unified brokerage API or embedded supported trades. Its listed starting price is $100, with a free plan. That makes it worth evaluating when your product connects to supported brokers rather than relying on one brokerage stack. Check broker-specific production constraints and confirm which trades your target brokers support.
Trade-off: Broker-specific constraints mean it is not a uniform replacement for every account.
7.2/10from
$100/mofree plan - Market data
Polygon.ioPolygon.ioPolygon.io suits applications that need market data through REST or WebSockets, historical data, or flat-file access. Its listed starting price is $23.20. Use it to replace or separate Alpaca’s data dependency while leaving order execution with a brokerage API. Confirm the asset coverage and data quality your strategies require before moving production jobs.
Trade-off: It is a data alternative, not a brokerage or order-execution replacement.
6.8/10from
$23.20/mo - Free-key prototyping
Alpha VantageAlpha VantageAlpha Vantage offers a free API key and varied asset coverage, making it an option for prototypes that need market-data endpoints before committing to another paid service. The listed starting price is $41.58. Keep its data client separate from your order client, and validate rate limits and data quality against the workload you intend to run.
Trade-off: Rate limits and data quality need validation before production use.
6.6/10from
$41.58/mofree plan - Structured financial data
Financial Modeling PrepFinancial Modeling PrepFinancial Modeling Prep is aimed at research, screening and structured market datasets, rather than replacing Alpaca’s brokerage function. Its listed starting price is $19, with a free plan. Consider it when the dependency you want to move is financial data; keep execution behind a separate brokerage adapter and verify the datasets your application depends on.
Trade-off: It does not replace brokerage execution; verify coverage and reliability.
6.8/10from
$19/mofree plan - Global fundamentals
FinnhubFinnhubFinnhub is a data option for prototypes needing US market data, global company fundamentals or alternative data. The listed starting price is $3,500, with a free plan; global access starts at $3,500 per month with annual billing. It may fit a data-heavy research product, but compare the required coverage and billing commitment before migrating.
Trade-off: Global access has a high listed price and annual billing.
7.0/10from
$3,500/mofree plan
03Side by side
| Tool | Score | From | Free plan | Best for |
|---|---|---|---|---|
 Alpaca Alpaca (current) | 6.9 | $99/mo | Yes | Algorithmic trading prototypes |
| Tradier Tradier | 6.6 | $10/mo | Yes | Automated trading with options |
| SnapTrade SnapTrade | 7.2 | $100/mo | Yes | Investment tracking apps |
| Polygon.io Polygon.io | 6.8 | $23.20/mo | No | Applications using REST or WebSockets |
| Alpha Vantage Alpha Vantage | 6.6 | $41.58/mo | Yes | Prototyping market-data integrations |
| Financial Modeling Prep Financial Modeling Prep | 6.8 | $19/mo | Yes | Financial research and screening apps |
| Finnhub Finnhub | 7.0 | $3,500/mo | Yes | US market-data prototypes |
Questions people ask
Which Alpaca alternative is cheapest?
The listed starting prices are $10 for Tradier, $19 for Financial Modeling Prep and $23.20 for Polygon.io. Tradier, Financial Modeling Prep and several other picks also list free plans. These prices cover different services, so compare the features, usage limits and production terms you need rather than choosing by starting price alone.
Can I replace Alpaca with a market-data API?
Not if your application also relies on Alpaca for order execution or brokerage features. Polygon.io, Alpha Vantage, Financial Modeling Prep and Finnhub are data options. Tradier and SnapTrade are the brokerage-oriented choices in this shortlist. A split architecture can keep data and execution behind separate interfaces, but you must validate each provider’s coverage and constraints.
Are any of these open-source or self-hosted?
We can’t identify a documented open-source, self-hosted drop-in among these options. If avoiding vendor lock-in is a requirement, ask providers about data export, licensing and deployment options before committing. Keep your application’s order and market-data interfaces separate so you can change providers without rewriting strategy code.