Alternatives, in AI in Markets
Polygon.io (Massive) Alternatives (2026)
Polygon.io rebranded to Massive (massive.com) on October 30, 2025; api.polygon.io still resolves, accounts carried over, and the Stocks pricing ladder is unchanged. The rebrand is not the reason to switch: the real fit issue is product segmentation. The Stocks Advanced tier delivers real-time equities, but options chains and tick-level microstructure are separate, pricier products, and the free tier is delayed-only. When your work needs what those add-on tiers cost extra for, a different vendor is cheaper. Each alternative below addresses a specific product gap, with prices verified against official pages on 2026-05-26.
4 alternatives. Published May 26, 2026. Updated Jul 13, 2026. By AI Fin Hub Research.
A developer-first market-data API for US stocks, options, indices, forex, and crypto, rebranded from Polygon.io to Massive (massive.com) on October 30, 2025. The API, accounts, and integrations carried over; api.polygon.io still resolves alongside the new api.massive.com base. Stocks pricing is a flat monthly ladder: Starter $29/month and Developer $79/month (15-minute-delayed), with Advanced at $199/month for real-time and unlimited API calls. A free tier offers end-of-day data at 5 requests/minute. Options, indices, and currencies are sold as separate products on their own tiers.
The alternatives
4 options worth a look
A licensed market-data provider delivering normalized real-time and historical data across 60-plus venues. It is the alternative you reach for when you need tick-level and Level 2 depth that Polygon's aggregated equities feed does not match.
Pros
- Pay-as-you-go historical data from roughly $0.50 per gigabyte, with $125 in signup credits to evaluate
- Venue-level L2 and L3 schemas suited to microstructure research, deeper than Polygon's aggregated feed
- Covers listed futures (CME) and OPRA options that Polygon sells only as separate, pricier products
Cons
- Metered billing scales aggressively for large or speculative backfills, unlike a flat monthly fee
- Live and bundled historical access moved to per-dataset subscriptions: CME Standard $199/month (since June 22, 2026), OPRA Standard $199/month
- No bundled brokerage; data only, so execution needs a separate vendor
Best for: Microstructure and tick-level research where Level 2 depth and venue schemas justify metered pricing
Market data bundled with a US brokerage and trading API, so one account streams quotes and places orders. The Basic plan is free; Algo Trader Plus adds full real-time SIP data and real-time OPRA options.
Pros
- Basic market data is free with any trading account, including paper accounts (IEX feed, 15-minute-delayed via API)
- Algo Trader Plus ($99/month) unlocks 100% US-exchange real-time data plus real-time options, cheaper than Polygon Advanced
- Tight integration with the brokerage API removes a second vendor when you also need execution
Cons
- Coverage centers on US equities, options, and crypto; no listed futures or indices product like Polygon
- Free tier is IEX-only (about 2 percent of consolidated volume), so backtests on it are partial
- You are tied to Alpaca's brokerage relationship to get the best data terms
Best for: Algo traders who want execution and data from one vendor and live in US equities and options
A research-grade provider focused on end-of-day prices, fundamentals, and news at budget prices. It is the alternative when you do not need real-time tick data and want a low fixed bill for long-horizon work.
Pros
- Cheap entry: a low-cost Power tier covers EOD prices, fundamentals, and news in one plan
- Strong fundamentals and news coverage relative to price, good for long-horizon equity research
- Simple flat pricing with no metered surprises
Cons
- No real-time tick streaming or Level 2 depth; intraday is limited versus Polygon Advanced
- No options or listed-futures coverage
- Not suited to execution-sensitive or microstructure strategies
Best for: Long-horizon equity research on EOD prices plus fundamentals where real-time is not required
A fundamentals-first API with 100-plus endpoints covering financial statements, ratios, DCF valuations, earnings transcripts, insider trades, and SEC filings, with intraday prices on higher tiers.
Pros
- Generous free tier (250 requests/day, EOD data) to prototype before paying
- Deep fundamentals: statements, ratios, transcripts, and SEC filings in one account
- Flat budget tiers: Starter $19/month, Premium $49/month, Ultimate $99/month
Cons
- Price-data depth and real-time coverage trail a dedicated market-data vendor like Polygon Advanced
- Lower tiers cap historical depth and intraday resolution
- No options chains or Level 2 microstructure data
Best for: Builders who need deep fundamentals and filings cheaply and treat price data as secondary
Decision table
See the tradeoffs side by side
| Criterion | Polygon (Massive) | Databento | Alpaca | FMP |
|---|---|---|---|---|
| Pricing model | Flat monthly tiers | Pay-as-you-go $/GB + plans | Free + $99/mo upgrade | Free + flat tiers |
| Real-time entry | Advanced $199/mo | Subscription per venue | Algo Trader Plus $99/mo | Premium $49/mo (intraday) |
| Asset coverage | Stocks, options, FX, crypto, indices | Equities, futures, options | US equities, options, crypto | Stocks + fundamentals |
| Microstructure depth | Aggregated, lighter depth | Venue-level L2/L3 | Retail-scale | None (EOD/intraday bars) |
| Fundamentals | Limited | No | No | Deep (statements, filings) |
| Bundled execution | No | No | Yes (brokerage) | No |
Verdict
If you want a predictable flat bill for real-time US equities, Polygon.io (now Massive) on the $199/month Advanced tier is still the cleanest default, and the rebrand changes nothing operationally. Switch for fit, not the name: choose Databento when you need tick-level and Level 2 depth, Alpaca when you also want a brokerage and your world is US equities and options, Tiingo when long-horizon EOD prices plus fundamentals matter more than real-time, and Financial Modeling Prep when deep fundamentals and filings on a budget are the job and price data is secondary. Run your own volume through a data-vendor TCO model before deciding; the headline rate rarely matches your real bill.
Run the numbers next
- Comparators Market Data API Cost Calculator
Compute annual cost of market data across Databento, Polygon, Alpaca, Tiingo, FMP, and Alpha Vantage for your exact universe, bar resolution, and real-time needs.
- Comparators Broker API Comparator
Alpaca vs IBKR vs Tradier vs Schwab vs Robinhood — compare auth, rate limits, order types, market data, MCP, and fees before wiring a line of code.
- Generators Synthetic Market Data Generator
Generate synthetic price series — geometric Brownian motion, GARCH(1,1) with volatility clustering, regime-switching bull/bear, or copula-linked.
- Playgrounds Order Book Replay Visualizer
Drop a Level-2 snapshot CSV and replay the book snapshot by snapshot. Animated depth bars, best bid/ask, spread and imbalance. Understand microstructure before.
Questions people ask next
Did Polygon.io change its name to Massive?
Yes. Polygon.io rebranded to Massive (massive.com) effective October 30, 2025. The company says the new name reflects its focus on scale and market-data infrastructure. For existing users, the important part is that APIs, accounts, and integrations carried over without interruption: the API now defaults to api.massive.com, while api.polygon.io remains supported for an extended period. Pricing for the Stocks tiers (Starter $29, Developer $79, Advanced $199 per month) is unchanged. So the rebrand alone is not a reason to switch providers.
What is the best Polygon.io alternative for tick and order-book data?
Databento. Polygon's equities feed is aggregated and lighter on depth, so for tick-level and Level 2 or Level 3 order-book data you want a venue-level provider. Databento delivers normalized schemas across 60-plus venues with pay-as-you-go historical data from roughly $0.50 per gigabyte and $125 in signup credits to evaluate. The tradeoff is metered billing that scales aggressively for large backfills, plus per-dataset subscription plans for live data (CME Standard $199/month since June 22, 2026, OPRA Standard $199/month). For aggregated bars on a flat fee, Polygon Advanced stays cheaper and more predictable.
Is there a cheaper alternative to Polygon.io for real-time data?
Alpaca Algo Trader Plus at $99/month is cheaper than Polygon's $199/month Advanced tier and includes full real-time US-exchange data plus real-time options, with a brokerage bundled in. The catch is coverage: Alpaca centers on US equities, options, and crypto with no listed-futures or indices product, and its free tier is IEX-only at about 2 percent of consolidated volume. If you only need fundamentals with intraday prices, Financial Modeling Prep Premium at $49/month is cheaper still, though its price-data depth trails a dedicated market-data vendor.
Sources
- Polygon.io is Now Massive , Massive Blog (accessed 2026-05-26)
- Massive Pricing , Massive (accessed 2026-05-26)
- Databento Pricing , Databento (accessed 2026-07-13)
- Alpaca Market Data Plans , Alpaca (accessed 2026-05-26)
- Financial Modeling Prep Pricing Plans , Financial Modeling Prep (accessed 2026-05-26)
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