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Options flow & unusual activity

Live feeds of options trades, filtered for size and aggressiveness. 6 tools, sorted A to Z. Prices from each vendor's own page, checked Oct 18, 2026.

Tool	From	Free tier	Trial	Data
BullFlow	$39/mo	No	Not stated	Real-time
Cheddar Flow	$75/mo	No	7-day free trial (Standard plan only)	Real-time
FlowAlgo	$99/mo	No	Two-week paid trial ($37)	Real-time
InsiderFinance	$75/mo	Yes	Not stated	Real-time
Quant Data	See site	No	Not stated	Not stated
Unusual Whales	$50/mo	Yes	No trial on dashboard plans; free tier instead	Real-time / Delayed

BullFlow

Real-time options flow with GEX levels, dark pool prints and a developer API.

Cheddar Flow

Real-time options order flow and dark pool feed with filters, alerts and an AI assistant.

FlowAlgo

Real-time options order flow, block trades and dark pool prints, filtered to larger orders.

InsiderFinance

Options order flow, dark pool prints and news sentiment in one dashboard, with mobile apps.

Quant Data

Options order flow, dark pool and net-drift style dashboards for US stocks and ETFs.

Unusual Whales

Options flow dashboard: a live feed of every US options trade with unusual-activity tags, plus dark pool prints, GEX heatmaps, screeners and news.