The short answer

The cheapest stock market data API in 2026 depends on the job. Alpaca's free IEX feed ($0) is the real-time floor (small slice of volume), Finnhub gives free real-time US quotes at 60 calls/minute, Tiingo's free Starter covers 30+ years of EOD, and the cheapest full SIP tape is Alpaca Algo Trader Plus ($99/mo) or Massive (ex-Polygon) Advanced ($199/mo). Every cheap tier hides one deal-breaker. Verified 2026-07-12.

The cheapest stock market data API in 2026 depends on the job. For genuinely-free real-time, Alpaca's IEX feed ($0) is the floor, with the catch that IEX is a small slice of consolidated volume. For free real-time US quotes with a usable rate limit, Finnhub (60 calls/min, $0). For free EOD with 30+ years of history, Tiingo's free Starter tier. For the cheapest path to a full real-time SIP tape, you pay: Alpaca Algo Trader Plus at $99/mo or Polygon (now Massive) Advanced at $199/mo. Every "cheap" tier hides one deal-breaker; the Data Vendor TCO surfaces the all-in number.

TL;DR

Job Cheapest option Price The catch
Free real-time (any) Alpaca IEX feed $0 IEX is a fraction of consolidated volume
Free real-time quotes + WebSocket Finnhub free $0 personal/non-commercial use only
Free EOD / historical Polygon Basic, Alpaca $0 5 calls/min; 15-min historical cap (Alpaca)
Cheapest full SIP real-time Alpaca Algo Trader Plus $99/mo requires Alpaca brokerage account
Flat-rate intraday (delayed) Polygon Starter $29/mo 15-minute delayed until $199 Advanced

All figures re-verified 2026-07-12 against official pages — including Finnhub's paid ladder (previously not statically verifiable) and Tiingo's corrected tiers (see the change note below). Polygon figures are read from massive.com: Polygon.io rebranded to Massive on 2025-10-30, and polygon.io now redirects there.

The genuinely-free floor: Alpaca IEX

Alpaca's free Basic market-data tier is the IEX feed: real-time data, 200 API calls per minute, and up to 30 symbols over WebSocket, at $0 (verified 2026-07-12, docs.alpaca.markets). It is real-time and it is free, which sounds unbeatable until the catch: IEX is a single exchange representing a small share of US consolidated equity volume, so quotes can diverge from NBBO and last-trade prints miss the off-IEX tape. For research and signal prototyping it is fine; for execution-grade pricing it is not. The full IEX-vs-SIP breakdown is in Alpaca Free Tier: IEX vs SIP 2026.

The other free-tier constraint to know: on Alpaca's free plan, historical data is limited to the latest 15 minutes; older history needs a paid tier.

The best free rate limit: Finnhub

If the bottleneck is calls-per-minute rather than feed quality, Finnhub's free tier gives 60 calls/minute (versus Alpaca's 200 trading-API limit and Polygon's 5), free real-time US quotes, and a free WebSocket. The deal-breaker: the free tier is personal/non-commercial use only. The paid ladder is now verified (2026-07-12, from the pricing page's embedded plan data): Market Data Basic $49.99/mo billed quarterly, Standard $129.99/mo billed quarterly, Professional $199.99/mo billed annually — and even those self-serve plans stay personal-use; commercial use requires Finnhub's written approval. Detail in Is Finnhub Free? 2026.

The cheapest real-time SIP tape

When the strategy needs the full consolidated tape (NBBO-quality quotes, complete trade prints), the genuinely-free options run out and you pay for SIP:

  • Alpaca Algo Trader Plus — $99/mo: full SIP across all US exchanges plus the OPRA options feed, 10,000 API calls/minute, unlimited WebSocket subscriptions (verified 2026-07-12). The catch is you need an Alpaca brokerage account.
  • Polygon.io (Massive) Advanced — $199/mo: full real-time stocks, unlimited API calls, flat-rate (verified 2026-07-12, massive.com/pricing). The catch is the price step from the $79 Developer tier, which is still 15-minute delayed.

At $99 vs $199 for full real-time, Alpaca is the cheaper SIP path if you are willing to open the brokerage account; Polygon is the data-only flat-rate alternative.

The cheapest fundamentals path

For fundamentals (not just prices), the budget math changed with the 2026-07-12 re-verification. Tiingo's Starter tier is free — 30+ years of EOD history plus the news API, capped at 500 unique symbols/month and 50 requests/hour — and Power is $30/mo ($300/yr) for the full universe. But fundamentals is a separate Tiingo add-on priced on top; it is not bundled into Power, contrary to older snapshots. For documented flat pricing on a fundamentals-first vendor, FMP's repriced ladder starts at $22/mo (billed annually, 300 calls/min, 5-year history; earnings-call transcripts require the $149/mo Ultimate tier). The Data Vendor TCO engine catalogue carries both at the 2026-07-12 snapshot.

Every cheap tier's deal-breaker

The one-line trap per option, so you do not get surprised in production:

Option Deal-breaker
Alpaca IEX free IEX volume share is small; not NBBO-grade
Finnhub free personal/non-commercial use only
Polygon Basic free 5 calls/min, end-of-day only
Alpaca free historical latest-15-minutes cap on history
Polygon Starter $29 15-minute delayed, not real-time
Tiingo free 500 unique symbols/mo + 50 req/hr caps; fundamentals is a paid add-on

The economics, computed live

The Data Vendor TCO engine ranks the field on annual all-in cost for a small-universe daily-resolution profile, the canonical cheapest-path use case. The verified output block at the foot of the page is computed from the shipped engine bundle, not typed by hand. The engine's vendor snapshot was refreshed on 2026-07-12 and matches the prose above.

What changed as of 2026-07-12

All vendor pages were re-verified on 2026-07-12. Three corrections and confirmations since the 2026-05-25 check:

  • Tiingo's tiers are corrected: the old engine snapshot carried a ~$10 entry tier and a ~$50 Power price. Verified from Tiingo's own page data: Starter is free, Power is $30/mo ($300/yr), and $50/mo ($499/yr) is the separate internal-commercial license. Fundamentals is a paid add-on on top of any plan.
  • Finnhub's paid ladder is now verified: Market Data Basic $49.99/mo (billed quarterly), Standard $129.99/mo (quarterly), Professional $199.99/mo (annual) — all self-serve plans remain personal-use.
  • Alpaca and Massive (ex-Polygon.io) unchanged: free IEX / $99 Algo Trader Plus, and the $0 / $29 / $79 / $199 Stocks ladder with real-time at Advanced.

Decision guidance

  • Free, real-time, research-only: Alpaca IEX (accept the volume-share caveat).
  • Free, best rate limit, prototyping: Finnhub (personal use only).
  • Cheapest full real-time SIP: Alpaca Algo Trader Plus $99/mo (brokerage account required).
  • Flat-rate data-only: Polygon (Massive) Starter $29 delayed, Advanced $199 real-time.
  • Fundamentals on a budget: Tiingo free Starter plus its fundamentals add-on, or FMP Starter ($22/mo, billed annually).

Connects to

References

  • Alpaca. "About Market Data API." docs.alpaca.markets/us/docs/about-market-data-api, verified 2026-07-12 (free IEX, Algo Trader Plus $99/mo, 10,000 calls/min).
  • Massive (formerly Polygon.io). "Pricing." massive.com/pricing, verified 2026-07-12 (Basic $0 EOD, Starter $29, Advanced $199 real-time; rebrand official 2025-10-30, polygon.io redirects).
  • Finnhub. "Pricing / API docs." finnhub.io/pricing, verified 2026-07-12 from the page's embedded plan data (free 60 calls/min, personal-use restriction; Market Data Basic $49.99/mo quarterly, Standard $129.99/mo quarterly, Professional $199.99/mo annual).
  • Tiingo. "Pricing." tiingo.com/about/pricing, verified 2026-07-12 from the page's embedded plan data (free Starter; Power $30/mo or $300/yr; Commercial $50/mo or $499/yr; fundamentals as separate add-on).

Verified engine output

Show the recompute-verified inputs and outputs
Small-universe daily-resolution cheapest-path profile — annual TCO ranked across vendors
Inputs
universesmall
resolutiondaily
needs_livefalse
needs_optionsfalse
needs_futuresfalse
Result
scenario › universesmall
scenario › resolutiondaily
scenario › history5-year
scenario › needs livefalse
scenario › needs optionsfalse
scenario › needs futuresfalse
ranked › row 1 › vendor › idalpaca
ranked › row 1 › vendor › nameAlpaca Markets
ranked › row 1 › vendor › urlhttps://alpaca.markets
ranked › row 1 › vendor › short pitchBroker-bundled market data. Generous free tier via IEX feed; SIP feed requires paid plan.
ranked › row 1 › vendor › has overagefalse
ranked › row 1 › vendor › last checked2026-07-12
ranked › row 1 › vendor › tiers › row 1 › nameFree (IEX feed)
ranked › row 1 › vendor › tiers › row 1 › monthly0
ranked › row 1 › vendor › tiers › row 1 › includes livetrue
ranked › row 1 › vendor › tiers › row 1 › includes optionsfalse
ranked › row 1 › vendor › tiers › row 1 › includes futuresfalse
ranked › row 1 › vendor › tiers › row 1 › resolutions › row 1daily
ranked › row 1 › vendor › tiers › row 1 › resolutions › row 2minute
ranked › row 1 › vendor › tiers › row 1 › notes › row 1IEX feed only (subset of volume)
ranked › row 1 › vendor › tiers › row 1 › notes › row 2Free with Alpaca brokerage account
ranked › row 1 › vendor › tiers › row 2 › nameAlgo Trader Plus (SIP feed)
ranked › row 1 › vendor › tiers › row 2 › monthly99
ranked › row 1 › vendor › tiers › row 2 › includes livetrue
ranked › row 1 › vendor › tiers › row 2 › includes optionstrue
ranked › row 1 › vendor › tiers › row 2 › includes futuresfalse
ranked › row 1 › vendor › tiers › row 2 › resolutions › row 1daily
ranked › row 1 › vendor › tiers › row 2 › resolutions › row 2minute
ranked › row 1 › vendor › tiers › row 2 › resolutions › row 3second
ranked › row 1 › vendor › tiers › row 2 › resolutions › row 4tick
ranked › row 1 › vendor › tiers › row 2 › notes › row 1Full SIP consolidated tape
ranked › row 1 › vendor › tiers › row 2 › notes › row 2Options chains included
ranked › row 1 › tier › nameFree (IEX feed)
ranked › row 1 › tier › monthly0
ranked › row 1 › tier › includes livetrue
ranked › row 1 › tier › includes optionsfalse
ranked › row 1 › tier › includes futuresfalse
ranked › row 1 › tier › resolutions › row 1daily
ranked › row 1 › tier › resolutions › row 2minute
ranked › row 1 › tier › notes › row 1IEX feed only (subset of volume)
ranked › row 1 › tier › notes › row 2Free with Alpaca brokerage account
ranked › row 1 › monthly0
ranked › row 1 › one time0
ranked › row 1 › annual total0
ranked › row 1 › meets resolutiontrue
ranked › row 1 › meets livetrue
ranked › row 1 › meets optionstrue
ranked › row 1 › meets futurestrue
ranked › row 1 › meets alltrue
ranked › row 2 › vendor › idtiingo
ranked › row 2 › vendor › nameTiingo
ranked › row 2 › vendor › urlhttps://www.tiingo.com
ranked › row 2 › vendor › short pitchEOD + news at low cost, with IEX-sourced real-time on every plan. Fundamentals is a separate add-on. Favorite for long-horizon research.
ranked › row 2 › vendor › has overagefalse
ranked › row 2 › vendor › last checked2026-07-12
ranked › row 2 › vendor › tiers › row 1 › nameTiingo Starter (free)
ranked › row 2 › vendor › tiers › row 1 › monthly0
ranked › row 2 › vendor › tiers › row 1 › includes livetrue
ranked › row 2 › vendor › tiers › row 1 › includes optionsfalse
ranked › row 2 › vendor › tiers › row 1 › includes futuresfalse
ranked › row 2 › vendor › tiers › row 1 › resolutions › row 1daily
ranked › row 2 › vendor › tiers › row 1 › notes › row 1Free tier: 50 req/hr, 1,000 req/day, 500 unique symbols/mo
ranked › row 2 › vendor › tiers › row 1 › notes › row 230+ years EOD equities; news API included
ranked › row 2 › vendor › tiers › row 1 › notes › row 3IEX-sourced real-time WebSocket on every plan (subset of consolidated volume)
ranked › row 2 › vendor › tiers › row 2 › nameTiingo Power
ranked › row 2 › vendor › tiers › row 2 › monthly30
ranked › row 2 › vendor › tiers › row 2 › includes livetrue
ranked › row 2 › vendor › tiers › row 2 › includes optionsfalse
ranked › row 2 › vendor › tiers › row 2 › includes futuresfalse
ranked › row 2 › vendor › tiers › row 2 › resolutions › row 1daily
ranked › row 2 › vendor › tiers › row 2 › resolutions › row 2minute
ranked › row 2 › vendor › tiers › row 2 › notes › row 1$30/mo ($300/yr): 10,000 req/hr, 100k req/day, 40 GB/mo bandwidth cap
ranked › row 2 › vendor › tiers › row 2 › notes › row 2Intraday IEX bars + crypto
ranked › row 2 › vendor › tiers › row 2 › notes › row 3Fundamentals is a separate add-on (not included)
ranked › row 2 › vendor › tiers › row 2 › notes › row 4Commercial license (internal use, max 2 devs) is $50/mo ($499/yr)
ranked › row 2 › tier › nameTiingo Starter (free)
ranked › row 2 › tier › monthly0
ranked › row 2 › tier › includes livetrue
ranked › row 2 › tier › includes optionsfalse
ranked › row 2 › tier › includes futuresfalse
ranked › row 2 › tier › resolutions › row 1daily
ranked › row 2 › tier › notes › row 1Free tier: 50 req/hr, 1,000 req/day, 500 unique symbols/mo
ranked › row 2 › tier › notes › row 230+ years EOD equities; news API included
ranked › row 2 › tier › notes › row 3IEX-sourced real-time WebSocket on every plan (subset of consolidated volume)
ranked › row 2 › monthly0
ranked › row 2 › one time0
ranked › row 2 › annual total0
ranked › row 2 › meets resolutiontrue
ranked › row 2 › meets livetrue
ranked › row 2 › meets optionstrue
ranked › row 2 › meets futurestrue
ranked › row 2 › meets alltrue
ranked › row 3 › vendor › iddatabento
ranked › row 3 › vendor › nameDatabento
ranked › row 3 › vendor › urlhttps://databento.com
ranked › row 3 › vendor › short pitchPer-unit metered pricing. Strong for institutional-quality tick + L2 data. No subscriptions on base offer.
ranked › row 3 › vendor › has overagetrue
ranked › row 3 › vendor › last checked2026-07-12
ranked › row 3 › vendor › tiers › row 1 › nameDatabento metered (typical retail)
ranked › row 3 › vendor › tiers › row 1 › monthly125
ranked › row 3 › vendor › tiers › row 1 › includes livetrue
ranked › row 3 › vendor › tiers › row 1 › includes optionsfalse
ranked › row 3 › vendor › tiers › row 1 › includes futurestrue
ranked › row 3 › vendor › tiers › row 1 › resolutions › row 1daily
ranked › row 3 › vendor › tiers › row 1 › resolutions › row 2minute
ranked › row 3 › vendor › tiers › row 1 › resolutions › row 3second
ranked › row 3 › vendor › tiers › row 1 › resolutions › row 4tick
ranked › row 3 › vendor › tiers › row 1 › resolutions › row 5level2
ranked › row 3 › vendor › tiers › row 1 › notes › row 1Usage-metered: historical is pay-as-you-go priced per GB (uncompressed binary), no subscription required; $125 free credits on signup (6-month expiry)
ranked › row 3 › vendor › tiers › row 1 › notes › row 2Flat plans: Standard $179/mo (live + historical; 16+ yrs L0, 1 yr L1, 1 mo L2-L3); Plus $1,500/mo and Unlimited $4,000/mo on annual contracts (verified 2026-07-12)
ranked › row 3 › vendor › tiers › row 1 › notes › row 3$125/mo here models typical retail metered spend (medium universe, minute bars)
ranked › row 3 › vendor › tiers › row 1 › notes › row 4Per-GB cost scales aggressively with universe and resolution
ranked › row 3 › tier › nameDatabento metered (typical retail)
ranked › row 3 › tier › monthly125
ranked › row 3 › tier › includes livetrue
ranked › row 3 › tier › includes optionsfalse
ranked › row 3 › tier › includes futurestrue
ranked › row 3 › tier › resolutions › row 1daily
ranked › row 3 › tier › resolutions › row 2minute
ranked › row 3 › tier › resolutions › row 3second
ranked › row 3 › tier › resolutions › row 4tick
ranked › row 3 › tier › resolutions › row 5level2
ranked › row 3 › tier › notes › row 1Usage-metered: historical is pay-as-you-go priced per GB (uncompressed binary), no subscription required; $125 free credits on signup (6-month expiry)
ranked › row 3 › tier › notes › row 2Flat plans: Standard $179/mo (live + historical; 16+ yrs L0, 1 yr L1, 1 mo L2-L3); Plus $1,500/mo and Unlimited $4,000/mo on annual contracts (verified 2026-07-12)
ranked › row 3 › tier › notes › row 3$125/mo here models typical retail metered spend (medium universe, minute bars)
ranked › row 3 › tier › notes › row 4Per-GB cost scales aggressively with universe and resolution
ranked › row 3 › monthly13
ranked › row 3 › one time0
ranked › row 3 › annual total150
ranked › row 3 › meets resolutiontrue
ranked › row 3 › meets livetrue
ranked › row 3 › meets optionstrue
ranked › row 3 › meets futurestrue
ranked › row 3 › meets alltrue
ranked › row 4 › vendor › idfmp
ranked › row 4 › vendor › nameFinancial Modeling Prep
ranked › row 4 › vendor › urlhttps://site.financialmodelingprep.com
ranked › row 4 › vendor › short pitchFundamentals-heavy. Earnings, filings, transcripts. Price data is a secondary offer.
ranked › row 4 › vendor › has overagefalse
ranked › row 4 › vendor › last checked2026-07-12
ranked › row 4 › vendor › tiers › row 1 › nameStarter
ranked › row 4 › vendor › tiers › row 1 › monthly22
ranked › row 4 › vendor › tiers › row 1 › includes livefalse
ranked › row 4 › vendor › tiers › row 1 › includes optionsfalse
ranked › row 4 › vendor › tiers › row 1 › includes futuresfalse
ranked › row 4 › vendor › tiers › row 1 › resolutions › row 1daily
ranked › row 4 › vendor › tiers › row 1 › notes › row 1Billed annually ($22/mo equivalent)
ranked › row 4 › vendor › tiers › row 1 › notes › row 25 years history
ranked › row 4 › vendor › tiers › row 1 › notes › row 3300 API calls/min
ranked › row 4 › vendor › tiers › row 2 › namePremium
ranked › row 4 › vendor › tiers › row 2 › monthly59
ranked › row 4 › vendor › tiers › row 2 › includes livefalse
ranked › row 4 › vendor › tiers › row 2 › includes optionsfalse
ranked › row 4 › vendor › tiers › row 2 › includes futuresfalse
ranked › row 4 › vendor › tiers › row 2 › resolutions › row 1daily
ranked › row 4 › vendor › tiers › row 2 › resolutions › row 2minute
ranked › row 4 › vendor › tiers › row 2 › notes › row 1Billed annually
ranked › row 4 › vendor › tiers › row 2 › notes › row 230+ years history
ranked › row 4 › vendor › tiers › row 2 › notes › row 3750 calls/min
ranked › row 4 › vendor › tiers › row 3 › nameUltimate
ranked › row 4 › vendor › tiers › row 3 › monthly149
ranked › row 4 › vendor › tiers › row 3 › includes livetrue
ranked › row 4 › vendor › tiers › row 3 › includes optionsfalse
ranked › row 4 › vendor › tiers › row 3 › includes futuresfalse
ranked › row 4 › vendor › tiers › row 3 › resolutions › row 1daily
ranked › row 4 › vendor › tiers › row 3 › resolutions › row 2minute
ranked › row 4 › vendor › tiers › row 3 › resolutions › row 3second
ranked › row 4 › vendor › tiers › row 3 › notes › row 1Billed annually
ranked › row 4 › vendor › tiers › row 3 › notes › row 2Real-time
ranked › row 4 › vendor › tiers › row 3 › notes › row 33,000 calls/min
ranked › row 4 › vendor › tiers › row 3 › notes › row 4Earnings-call transcripts require this tier
ranked › row 4 › tier › nameStarter
ranked › row 4 › tier › monthly22
ranked › row 4 › tier › includes livefalse
ranked › row 4 › tier › includes optionsfalse
ranked › row 4 › tier › includes futuresfalse
ranked › row 4 › tier › resolutions › row 1daily
ranked › row 4 › tier › notes › row 1Billed annually ($22/mo equivalent)
ranked › row 4 › tier › notes › row 25 years history
ranked › row 4 › tier › notes › row 3300 API calls/min
ranked › row 4 › monthly22
ranked › row 4 › one time0
ranked › row 4 › annual total264
ranked › row 4 › meets resolutiontrue
ranked › row 4 › meets livetrue
ranked › row 4 › meets optionstrue
ranked › row 4 › meets futurestrue
ranked › row 4 › meets alltrue
ranked › row 5 › vendor › idpolygon
ranked › row 5 › vendor › nameMassive (formerly Polygon.io)
ranked › row 5 › vendor › urlhttps://massive.com
ranked › row 5 › vendor › short pitchFlat-rate subscription. Real-time + historical for US equities, with a separate Futures product line. Popular retail default. Rebranded from Polygon.io on 2025-10-30.
ranked › row 5 › vendor › has overagefalse
ranked › row 5 › vendor › last checked2026-07-12
ranked › row 5 › vendor › tiers (7 items)[...]
ranked › row 5 › tier › nameStocks Starter
ranked › row 5 › tier › monthly29
ranked › row 5 › tier › includes livefalse
ranked › row 5 › tier › includes optionsfalse
ranked › row 5 › tier › includes futuresfalse
ranked › row 5 › tier › asset classstocks
ranked › row 5 › tier › resolutions › row 1daily
ranked › row 5 › tier › resolutions › row 2minute
ranked › row 5 › tier › notes › row 115-min delayed market data
ranked › row 5 › tier › notes › row 2Unlimited API calls
ranked › row 5 › monthly29
ranked › row 5 › one time0
ranked › row 5 › annual total348
ranked › row 5 › meets resolutiontrue
ranked › row 5 › meets livetrue
ranked › row 5 › meets optionstrue
ranked › row 5 › meets futurestrue
ranked › row 5 › meets alltrue
ranked › row 6 › vendor › idalpha-vantage
ranked › row 6 › vendor › nameAlpha Vantage
ranked › row 6 › vendor › urlhttps://www.alphavantage.co
ranked › row 6 › vendor › short pitchBudget tier with broad coverage. Rate limits tight. Workable for low-frequency research.
ranked › row 6 › vendor › has overagefalse
ranked › row 6 › vendor › last checked2026-07-12
ranked › row 6 › vendor › tiers › row 1 › namePremium 75
ranked › row 6 › vendor › tiers › row 1 › monthly49.99
ranked › row 6 › vendor › tiers › row 1 › includes livefalse
ranked › row 6 › vendor › tiers › row 1 › includes optionsfalse
ranked › row 6 › vendor › tiers › row 1 › includes futuresfalse
ranked › row 6 › vendor › tiers › row 1 › resolutions › row 1daily
ranked › row 6 › vendor › tiers › row 1 › resolutions › row 2minute
ranked › row 6 › vendor › tiers › row 1 › notes › row 175 calls/min, no daily limit
ranked › row 6 › vendor › tiers › row 1 › notes › row 2Free key capped at 25 calls/day, 5/min
ranked › row 6 › vendor › tiers › row 2 › namePremium 1200
ranked › row 6 › vendor › tiers › row 2 › monthly249.99
ranked › row 6 › vendor › tiers › row 2 › includes livefalse
ranked › row 6 › vendor › tiers › row 2 › includes optionsfalse
ranked › row 6 › vendor › tiers › row 2 › includes futuresfalse
ranked › row 6 › vendor › tiers › row 2 › resolutions › row 1daily
ranked › row 6 › vendor › tiers › row 2 › resolutions › row 2minute
ranked › row 6 › vendor › tiers › row 2 › resolutions › row 3second
ranked › row 6 › vendor › tiers › row 2 › notes › row 11,200 calls/min, no daily limit
ranked › row 6 › vendor › tiers › row 2 › notes › row 2Rate-tiered ladder: $99.99/150, $149.99/300, $199.99/600, $249.99/1200
ranked › row 6 › tier › namePremium 75
ranked › row 6 › tier › monthly49.99
ranked › row 6 › tier › includes livefalse
ranked › row 6 › tier › includes optionsfalse
ranked › row 6 › tier › includes futuresfalse
ranked › row 6 › tier › resolutions › row 1daily
ranked › row 6 › tier › resolutions › row 2minute
ranked › row 6 › tier › notes › row 175 calls/min, no daily limit
ranked › row 6 › tier › notes › row 2Free key capped at 25 calls/day, 5/min
ranked › row 6 › monthly50
ranked › row 6 › one time0
ranked › row 6 › annual total600
ranked › row 6 › meets resolutiontrue
ranked › row 6 › meets livetrue
ranked › row 6 › meets optionstrue
ranked › row 6 › meets futurestrue
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Computed live at build time.

Frequently asked questions

What is the cheapest real-time stock API in 2026?
Alpaca's free IEX feed is $0 and real-time, but IEX is a small share of consolidated volume. For the full SIP tape, the cheapest is Alpaca Algo Trader Plus at $99/mo; Massive (ex-Polygon.io) Advanced is $199/mo (verified 2026-07-12).
Is there a free stock market data API?
Yes, several. Alpaca's IEX feed and Polygon's Basic tier are $0; Finnhub's free tier gives 60 calls/min with real-time US quotes. Each has a caveat: volume share, end-of-day-only, or personal-use restriction.
Which free tier has the best rate limit?
Finnhub at 60 calls/minute, versus Alpaca's 200 trading-API limit and Polygon's 5 calls/minute on the free Basic tier.
Cheapest API with fundamentals?
Tiingo's Starter tier is free and Power is $30/mo (verified 2026-07-12), but fundamentals is a separate Tiingo add-on priced on top of any plan. For documented flat fundamentals pricing, FMP starts at $22/mo billed annually; earnings-call transcripts require its $149/mo Ultimate tier.