Comparator
Market Data API Cost Calculator
Compare Databento vs Polygon vs Alpaca vs Tiingo vs FMP vs Alpha Vantage annual cost. Configure universe, bars, history, real-time. Browser-only. Free.
Transparent by design — computed in your browser from a published formula and sourced rates, not a black box. Data verified May 25, 2026. Sources: Databento pricing ↗ · Polygon.io pricing ↗ · Alpaca data plans ↗ · Tiingo pricing ↗ · FMP pricing ↗ · Alpha Vantage premium ↗
- Inputs
- Scenario form
- Runtime
- Instant
- Privacy
- Client-side · no upload
- API key
- Not required
1 · Describe your data needs
Cheapest qualifying vendor
$0/mo
Alpaca Markets
Free (IEX feed) · $0/yr · vs $30 for Tiingo (next-cheapest qualifying)
Up to $2,388/yr saved vs the most expensive qualifying vendor (Massive (formerly Polygon.io)).
2 · Ranked vendors
Based on list pricing. No affiliate tags, no sponsored rows.
| Vendor | Recommended tier | Monthly | Annual | Live | Opts | Fits |
|---|---|---|---|---|---|---|
| Alpaca Markets ↗best Broker-bundled market data. Generous free tier via IEX feed; SIP feed requires paid plan. | Free (IEX feed)
| $0 | $0 | ✓ | — | yes |
| Tiingo ↗ EOD + news at low cost, with IEX-sourced real-time on every plan. Fundamentals is a separate add-on. Favorite for long-horizon research. | Tiingo Power
| $30 | $360 | ✓ | — | yes |
| Databento ↗ Per-unit metered pricing. Strong for institutional-quality tick + L2 data. No subscriptions on base offer. | Databento metered (typical retail)
| $125 | $1,500 | ✓ | — | yes |
| Financial Modeling Prep ↗ Fundamentals-heavy. Earnings, filings, transcripts. Price data is a secondary offer. | Ultimate
| $149 | $1,788 | ✓ | — | yes |
| Massive (formerly Polygon.io) ↗ Flat-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. | Stocks Advanced
| $199 | $2,388 | ✓ | — | yes |
| Alpha Vantage ↗ Budget tier with broad coverage. Rate limits tight. Workable for low-frequency research. | Premium 75
| $50 | $600 | ✗ | — | no |
How this ranking works
Each vendor is scored by picking its cheapest tier that satisfies every requirement in your scenario. Tiers that don't meet the requested bar resolution, real-time need, or asset class (options / futures) are skipped. If no tier qualifies, the vendor is shown dimmed with "Fits: no."
Metered vendors like Databento don't have a flat subscription — the displayed monthly is a modeled estimate based on your universe size and resolution.
Pricing last checked 2026-07-12. Vendor rates drift; always verify on the vendor's pricing page before committing.
How to use
Step-by-step
- 1
Enter your universe size (number of symbols), bar resolution (tick / 1m / daily), history depth (years), and whether you need real-time updates.
- 2
The tool computes per-vendor cost: tier-priced vendors (Polygon, Alpaca, Tiingo, FMP, Alpha Vantage) auto-select the cheapest qualifying tier; Databento shows a modeled estimate — a base rate scaled by coarse universe and resolution multipliers — not exact per-symbol-per-day metering.
- 3
Read the rank-ordered comparison. Lowest cost isn't always the right answer — check coverage gaps in the methodology table.
- 4
Re-run with different universe sizes to find the breakpoint where vendors switch positions. Polygon and Databento can switch ranks between the Small and Medium universe buckets for delayed minute data, and between Medium and Large for real-time.
- 5
Check the asOfDate. Pricing is refreshed when a vendor announces a material change, not on a fixed monthly schedule — for current invoice cost, verify against the vendor's pricing page directly.
For agents
Use in an agent
Same math, same result shape as the UI above — as a static ES module. No HTTP request, no auth, no rate limit.
import { compute } from "https://aifinhub.io/engines/data-vendor-tco.js";Contract: /contracts/data-vendor-tco.json Full agent guide →
Questions people ask next
FAQ
How are the tier prices kept current?
Each vendor's pricing is verified against its official pricing page and stamped with a per-vendor last-checked date, shown on the methodology page. Refreshes are event-driven — done when a vendor announces a material pricing change, not on a fixed monthly schedule — so a mid-cycle change can lag until the next verification. Confirm current invoice cost against the vendor directly.
Why does Databento show metered pricing instead of a tier?
Databento's base offer is usage-metered (per-GB historical, subscription live; flat plans exist from $199/mo), so the tool shows a modeled estimate rather than picking a plan. That estimate is driven by your universe size and bar resolution (history depth is collected but does not currently change the number). The other vendors (Polygon, Alpaca, Tiingo, FMP, Alpha Vantage) sell flat tiers, so the tool selects the cheapest tier that satisfies your needs.
What's not included in TCO?
Storage costs (your S3 or local disk), bandwidth costs (data egress), redistribution fees (only relevant if you offer the data to clients), and corporate-actions fees (some vendors charge separately). The tool computes vendor invoice cost only.
Why is Polygon ranked above Databento for some workloads?
Polygon's flat tiers can be cheaper than Databento's metered pricing for users who need many symbols across many days. Databento wins on selective, deep-history workflows. The tool reorders rankings per workload — there's no universal 'best vendor'.
Does the tool include free-tier vendors?
The tool scores Alpha Vantage's paid tiers (Premium 75 and Premium 1200 calls/min). Its free tier — about 25 calls/day, 5/min — is mentioned as a note only; it is not scored and no warning is emitted. Yahoo Finance is excluded entirely: its terms prohibit commercial automated use.
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