Massive.com is the rebranded Polygon.io: a broad market-data platform that pipes stocks, options, forex, and crypto through one account. That breadth is the whole point — if your roadmap spans several asset classes and you want one vendor and one invoice, Massive is a natural fit. OptionData makes the opposite bet. It does exactly one thing — US equity-options flow — and shapes the entire stack around it: subscribe by underlying, filter at the server, and let the feed pre-aggregate sweeps and blocks before they ever reach your code. OptionData's Realtime Option Trades API streams ~10M+ trades/day with 30+ enriched fields, so most flow apps connect, set filters, and start consuming actionable trades immediately.
This guide compares the two for real-time options and is candid about where Massive's multi-asset reach is the better call.
See also: OptionData vs Alpaca and OptionData vs Intrinio.
Why OptionData for options flow. One API key, one WebSocket. You subscribe by underlying (
symbols=AAPL,SPY) instead of resolving OCC contract symbols, you receive payloads already enriched with premium, side, moneyness, Greeks, and a derived sentiment field, and you narrow the stream with server-side filters (symbols,premium,side,size,expiry_days,delta,aggregation_mode). The feed can also collapse split prints into block/sweep-level events for you. The result: far less glue code, no contract-list service, and a feed that is already shaped like the alerts you want to build.
OptionData also ships an Option Chain REST API and Historical SQL under the same API key, so the same flow model carries across live, snapshot, and historical data.
Executive Summary
- Massive (ex-Polygon): A multi-asset feed. You subscribe at the option-contract level (OCC ticker, a comma-separated list, or
*) and receive raw ticks; aggregation, Greeks, and flow filtering are yours to build. Best when stocks, options, forex, and crypto must come from one platform. - OptionData: Options-native. You subscribe by underlying, get server-side filters and pre-enriched payloads, and choose
AGGREGATEDorRAWdelivery. Best when options flow, sweep/block detection, and fast time-to-alert are the priority.
Bottom line: many asset classes from one feed → Massive; options-flow depth with the least integration work → OptionData.
1. Ticker Input: Underlying vs Contract-Level
OptionData: symbols=AAPL,SPY,TSLA (optional). One value covers every strike and expiration on that underlying — no option-symbol resolution.
Massive: ticker is required and contract-scoped: a single OCC option symbol, a comma-separated list, or * for the entire universe. To follow "all AAPL options" you either stream everything and filter client-side or keep a contract list in sync through their API.
In practice this is the difference between thinking in watchlist terms and thinking in contract terms. With OptionData a restart just re-sends the same underlying list, and new expirations appear automatically. With contract-level subscription you either ingest the full option universe (more volume, more cost, more latency) or own the lifecycle of an OCC contract list and refresh it as expirations roll.
2. Data Shape, Pre-Aggregation, and Server-Side Filtering
OptionData sends flow-ready payloads — premium, side, moneyness, Greeks, and a derived sentiment field — and applies filters in the feed via URL params. Massive sends raw ticks (price, size, exchange, condition, timestamp); enrichment, aggregation, and filtering all live in your app.
Why that matters: a live options feed is high-volume — OptionData alone carries ~10M+ trades/day. If the vendor hands you everything unfiltered, your service has to receive every print, enrich it, and run filter and aggregation logic before your alert code even sees a signal — more bandwidth, more CPU, more code to maintain. OptionData pushes that work upstream: set premium=[100000,null], delta=[0.35,1], or symbols=AAPL,SPY and only matching trades arrive. Aggregation (next section) trims the count further by folding split child prints into single block/sweep events.
OptionData enriches, filters, and aggregates upstream; with Massive that whole pipeline lives in your app.
3. Aggregation Mode (Block/Sweep Detection)
Big orders are routinely sliced into many child prints to hide size or work liquidity. If you only see the children, you are left guessing which prints belong to the same parent. OptionData's aggregation_mode parameter handles that reconstruction for you (see the WebSocket API reference):
- AGGREGATED (default): Prints for the same option symbol at the same instant collapse into one event. Instead of N messages for one logical block you get a single event whose
trade_countrecords how many prints were combined, withsizeandpremiumsummed and Greeks derived from the combined trade. Because it folds those child prints together, AGGREGATED meaningfully cuts the ~10M+ trades/day stream down to fewer, higher-signal events — so block and sweep activity surfaces instead of being scattered across the tape. - RAW: Every exchange print arrives untouched, with
trade_countalways 1. Use it when you want nothing modified and intend to run your own time-window-plus-symbol grouping.
Example (from OptionData docs): two RAW prints in the same second on the same TSLA 330 Call exp 2025-02-15 — one for 2 contracts at $1000 premium, one for 3 at $2000. AGGREGATED delivers a single event: trade_count=2, size=5, premium=3000. On Massive (or OptionData in RAW) you receive both prints and reconstruct the block yourself.
Same-instant child prints on one option symbol collapse into a single AGGREGATED block event.
4. Filters and Build Effort
OptionData: Compose the stream in the URL — e.g. symbols=AAPL,SPY&premium=[100000,null]&delta=[0.35,1]&side=ASK,AASK&expiry_days=[0,0] for aggressive 0DTE call-side flow — and only actionable trades arrive. Server-side filter set: symbols, premium, side, size, expiry_days, delta, aggregation_mode.
Massive: You receive a high-volume contract tick stream and build and tune every filter in your application.
Path to production: OptionData — connect, set filters, write alert rules, harden. Massive — connect, build aggregation, build an enrichment/feature pipeline, build a filter layer, then write alert rules.
5. When to Choose Which
- Choose OptionData when options flow is the job: underlying subscribe, server-side filters, built-in aggregation, enriched payloads, and the shortest path to a working sweep/block alert.
- Choose Massive when you genuinely need one vendor across stocks, options, forex, and crypto, or you want to own every transform and filter yourself.
Options-flow depth and speed to production point to OptionData; multi-asset breadth from one feed points to Massive.
6. Summary at a Glance
| OptionData | Massive (ex-Polygon) | |
|---|---|---|
| Subscription | Underlying tickers (AAPL, SPY) | Option contract tickers or * |
| Filtering | Server-side URL params | Client-side, in your app |
| Aggregation | Built-in (AGGREGATED/RAW) | You build it |
| Payloads | Enriched (premium, Greeks, sentiment) | Raw ticks |
| Scope | Options-only | Multi-asset (stocks/options/forex/crypto) |
| Effort to production | Fewer steps | More custom code |
Recommendation
If you are building options-flow tooling — sweep and block monitoring, smart-money alerts, options analytics — OptionData gets you there with less code and less to maintain: underlying subscribe, server-side filters, built-in aggregation, and payloads that already carry the fields your rules need. Reach for Massive when multi-asset coverage from a single vendor, or full control over every transform, outranks options-flow depth.
Try OptionData free. Start a 14-day trial (no credit card) — one API key covers the Realtime WebSocket, Historical SQL, and Option Chain REST APIs.
You can run this strategy programmatically with the OptionData API. Use Historical SQL for backtests and screens, and the Realtime WebSocket for live flow.
-H "Content-Type: application/x-www-form-urlencoded" \
-d "api_key=YOUR_KEY" \
--data-urlencode "sql=SELECT * FROM RawOptionTrades ORDER BY time DESC LIMIT 10"