The Best Investment APIs in 2026
E*TRADE Developer API is the one to choose: its no-cost access covers trading, portfolios, market information and sandbox testing in one package for broker-connected applications. E*TRADE Developer API is the best free option, while Tradier Brokerage API is the cheapest paid option at $10 a month. For established brokerage integrations, E*TRADE Developer API supports equity and options orders, REST data for balances and positions, and streaming status updates that can keep application state current. Interactive Brokers fits global multi-asset infrastructure, with API reach spanning funds, currencies, bonds, stocks, ETFs and options. Yodlee Account Aggregation suits established products that must gather many investment accounts: its REST interface handles account, transaction, holding and statement records, while event callbacks can signal changes. SnapTrade helps teams needing normalized brokerage portfolios, exposing holdings, balances, orders and transactions across connected brokers. The starting-price range is from $10 a month (Tradier Brokerage API) to $100 a month (SnapTrade's Launch platform fee).
Our top picks
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Top ranked
E*TRADE Developer API#1 of 349.3/10Free E*TRADE APIs combine trading, portfolio, market data and sandbox access.
Free plan
-
Runner-up
Interactive Brokers#2 of 349.2/10A global, multi-asset brokerage with API access, analytics and flexible pricing.
Free plan
-
Top-ranked free plan
Yodlee Account Aggregation#3 of 349.0/10A broad aggregation API for investment data, account connectivity and event notifications.
Free plan · pricing on request
Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.
The full ranking 34 tools, best first
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Best forEstablished brokerage API integrations
Free E*TRADE APIs combine trading, portfolio, market data and sandbox access.
- Tax-lot data
- OAuth connections
- Sandbox environment
9.3/10★★★★★Visit E*TRADE API -
Best forGlobal multi-asset trading infrastructure
A global, multi-asset brokerage with API access, analytics and flexible pricing.
9.2/10★★★★★Visit IBKR -
Best forEstablished multi-account investment aggregation
A broad aggregation API for investment data, account connectivity and event notifications.
- Webhooks
- Sandbox environment
- Portfolio data
Free plan · pricing on request Our Yodlee Account Aggregation verdict → Visit YodleeFor vendors Sponsor this spot · #3 · $79/mo →9.0/10★★★★☆Visit Yodlee -
Best forFree Indian trading and market-data APIs
A free India-focused API suite covering trading, live feeds, funds and portfolios.
- OAuth connections
- Trading orders
- Portfolio data
8.9/10★★★★☆Visit 5paisa Xstream -
Best forFeature-rich Indian broker API development
A comprehensive FYERS API for order automation, streaming data and broker-connected applications.
- Tax-lot data
- Webhooks
- OAuth connections
8.8/10★★★★☆Visit FYERS API -
Best forInstitutional investment-data aggregation
A broad aggregation layer for wealth platforms needing institutional investment data.
- Tax-lot data
- OAuth connections
- Sandbox environment
8.7/10★★★★☆Visit Morningstar -
Best forEnterprise multi-asset portfolio analytics
Enterprise portfolio analytics spanning public, private and alternative investments.
8.6/10★★★★☆Visit Addepar -
Best forBroad financial and investment account connectivity
Broad account, investment and liability connectivity for financial products.
8.5/10★★★★☆Visit Plaid -
Best forUS multi-asset trading with paper accounts
A US-focused trading API with paper accounts, advanced orders, and streaming market data.
8.4/10★★★★☆Visit Alpaca -
Best forActive futures and technical trading
Advanced futures charting, simulation and order tools with flexible commission plans.
8.3/10★★★★☆Visit NinjaTrader -
Best forPermissioned investment-account data access
A permissioned API network for investment, account, identity, payment and statement data.
8.2/10★★★★☆Visit Akoya -
Best forLow-cost enriched financial-data feeds
A paid API suite for consented account data, enrichment and affordability insights.
8.1/10★★★★☆Visit Basiq -
Best forEnterprise financial and investment aggregation
MX connects, cleans and verifies financial data for banks, lenders and fintechs.
8.0/10★★★★☆Visit MX -
Best forCompliant bank and investment aggregation
A compliant API for connecting bank and investment accounts with normalized data.
7.9/10★★★★☆Visit Salt Edge -
Best forCanadian self-directed investing platforms
A broad Canadian brokerage with free core accounts and an optional paid data tier.
7.8/10★★★★☆Visit Questrade -
Best forAffordable equities and options trading APIs
Affordable trading API with multi-leg orders, streaming data and paper trading.
- Tax-lot data
- OAuth connections
- Sandbox environment
7.8/10★★★★☆Visit Tradier API -
Best forIndian trading APIs with sandbox testing
A Dhan-connected API suite with lifetime-free trading endpoints and paid market data.
- Webhooks
- OAuth connections
- Sandbox environment
7.7/10★★★★☆Visit DhanHQ -
Best forFree Indian algo-trading connectivity
Free API connectivity for Alice Blue clients building Indian algo-trading tools.
- Webhooks
- Trading orders
- Portfolio data
7.6/10★★★★☆Visit Alice Blue -
Best forFree Indian order and market-data API
A free Indian trading API with orders, portfolio data, streaming and SDK support.
- OAuth connections
- Sandbox environment
- Trading orders
7.5/10★★★★☆Visit Shoonya -
Best forEnterprise brokerage infrastructure with sandbox
Enterprise brokerage APIs with trading, account, portfolio and risk capabilities.
- Account opening
- Sandbox environment
- Trading orders
7.4/10★★★★☆Visit Clear Street -
Best forBroker onboarding and multi-market trading APIs
A broad Saxo integration for brokers needing orders, prices, portfolios and onboarding.
- Account opening
- OAuth connections
- Sandbox environment
7.3/10★★★★☆Visit Saxo OpenAPI -
Best forEmbedded investing and portfolio automation
API infrastructure for fintechs and financial institutions building investing products.
- Account opening
- Webhooks
- Sandbox environment
7.2/10★★★★☆Visit Upvest -
Best forEnterprise brokerage account and tax-lot APIs
Broad brokerage and tax-lot APIs for fintechs that can engage sales.
- Account opening
- Tax-lot data
- Sandbox environment
7.1/10★★★★☆Visit DriveWealth -
Best forUnified multi-broker trading connectivity
A single API for multi-broker trading, streaming data and portfolio access.
- OAuth connections
- Trading orders
- Portfolio data
7.0/10★★★★☆Visit Connect Trade -
Best forBrokerage connectivity with normalized portfolios
SnapTrade connects brokerage accounts with normalized portfolio data and trading APIs.
- Tax-lot data
- Webhooks
- OAuth connections
6.9/10★★★☆☆Visit SnapTrade -
Best forSandboxed multi-broker API prototyping
Sandboxed multi-broker API for building trading and portfolio products.
- Webhooks
- OAuth connections
- Sandbox environment
6.8/10★★★☆☆Visit Finatic -
Best forRetail investing across Indian asset classes
A broad Indian investing platform covering trading, funds, IPOs and portfolio tracking.
6.7/10★★★☆☆Visit Angel One -
Best forEnterprise financial-data enrichment
Flinks combines bank connectivity, enrichment, document processing and payments for financial businesses.
6.6/10★★★☆☆Visit Flinks -
Best forOpen-banking investment data integration
API-first connectivity for normalized investment data, payments and consent flows.
- Webhooks
- OAuth connections
- Sandbox environment
6.5/10★★★☆☆Visit Moneyhub -
Best forEnterprise wealth-management API suites
A broad cloud API suite for institutions building wealth-management applications.
- Trading orders
- Portfolio data
6.4/10★★★☆☆Try Privé API Portal -
Best forAutomated tax-aware portfolio management
A tax-aware portfolio management toolkit for advisors, fintechs, and wealth firms.
6.3/10★★★☆☆Visit Apex Fintech -
Best forCanadian investment-account aggregation
A Canadian-focused aggregation API with widgets, OAuth, SDK access and sync webhooks.
6.2/10★★★☆☆Contact Wealthica -
Best forEuropean brokerage account infrastructure
A European Brokerage-as-a-Service API spanning accounts, trading and post-trade workflows.
- Account opening
- Webhooks
- Sandbox environment
6.1/10★★★☆☆Contact sales -
Best forPayroll-connected financial applications
A payroll-data API for financial applications that need employment and deposit workflows.
5.9/10★★★☆☆Visit Atomic
No tools match those filters.
Compare at a glance
| # | Tool | Free plan | Paid from | Trading orders | Portfolio data | Score |
|---|---|---|---|---|---|---|
| 1 | E*TRADE Developer API | Yes | Free | Yes | Yes | 9.3 |
| 2 | Interactive Brokers | Yes | $0.0005/unit usage-based | 9.2 | ||
| 3 | Yodlee Account Aggregation | Yes | No | Yes | 9.0 | |
| 4 | 5paisa Xstream API | Yes | Yes | Yes | 8.9 | |
| 5 | FYERS API | Yes | Yes | Yes | 8.8 | |
| 6 | Morningstar ByAllAccounts | No | Yes | 8.7 | ||
| 7 | Addepar | 8.6 | ||||
| 8 | Plaid | No | 8.5 | |||
| 9 | Alpaca | Yes | $99/mo | 8.4 | ||
| 10 | NinjaTrader | Yes | 8.3 | |||
| 11 | Akoya | 8.2 | ||||
| 12 | Basiq | $0.25/user/mo | 8.1 | |||
| 13 | MX | Yes | 8.0 | |||
| 14 | Salt Edge Account Information API | No | 7.9 | |||
| 15 | Questrade | Yes | CA$19.99/mo | 7.8 | ||
| 16 | Tradier Brokerage API | Yes | $10/mo | Yes | Yes | 7.8 |
| 17 | DhanHQ Trading API | Yes | Yes | Yes | 7.7 | |
| 18 | Alice Blue ANT API | Yes | Free | Yes | Yes | 7.6 |
| 19 | Shoonya API | Yes | Free | Yes | Yes | 7.5 |
| 20 | Clear Street API | Yes | Yes | 7.4 | ||
| 21 | Saxo OpenAPI | Yes | Yes | 7.3 | ||
| 22 | Upvest Investment API | Yes | Yes | 7.2 | ||
| 23 | DriveWealth API | Yes | Yes | 7.1 | ||
| 24 | Connect Trade API | No | $19/mo | Yes | Yes | 7.0 |
| 25 | SnapTrade | Yes | $1/user/mo | Yes | Yes | 6.9 |
| 26 | Finatic | Yes | Yes | Yes | 6.8 | |
| 27 | Angel One | Yes | 6.7 | |||
| 28 | Flinks | No | $250/mo | 6.6 | ||
| 29 | Moneyhub API | Yes | 6.5 | |||
| 30 | Privé API Portal | Yes | Yes | 6.4 | ||
| 31 | Apex Fintech Solutions Portfolio Management | 6.3 | ||||
| 32 | Wealthica API | 6.2 | ||||
| 33 | lemon.markets Brokerage API | Yes | Yes | 6.1 | ||
| 34 | Atomic | 5.9 |
Head-to-head All 28 comparisons →
- E*TRADE Developer API vs Interactive Brokers
- E*TRADE Developer API vs Yodlee Account Aggregation
- E*TRADE Developer API vs 5paisa Xstream API
- E*TRADE Developer API vs FYERS API
- E*TRADE Developer API vs Morningstar ByAllAccounts
- E*TRADE Developer API vs Addepar
- E*TRADE Developer API vs Plaid
- Interactive Brokers vs Yodlee Account Aggregation
- Interactive Brokers vs 5paisa Xstream API
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How we rank investment APIs
Every tool on this page was researched by iTechGuides Editors from its official website — pricing pages, plan tables and product documentation. We rank on how well each one does this category's core job, what the free or entry plan includes, and where it falls short. Where we have enough verified facts, the score out of 10 is a rubric — job fit, value and how much we could verify — shown with its breakdown on every tool's page; a tool we have not verified enough to score yet shows its rank without a number. Scores are re-checked when a product changes its plans. Read the full editorial policy, or submit a tool we missed.
Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026
Last updated · How we research and update