
GammaWalls
GEX Horizon
Barchart
GammaFlip
ChartGEX
FinViz
PremiumGuardHQ
Real-time options analytics API - Greeks, gamma exposure, SVI vol surfaces for 6,000+ underlyings. Free tier available.

Deno
Full-stack Javascript Components for one-dev armies
Which is more popular?
Based on our record, FlashAlpha seems to be more popular. It has been mentioned 2 times since March 2021.
Website, pricing, platforms and company facts side by side.
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| Website | flashalpha.com | nullstack.app |
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| Company | Startup from Cyprus · 2026 | — |
| Listed in |
In their own words, as submitted to SaaSHub.


FlashAlpha is a real-time options analytics API for quant traders and developers. It computes gamma exposure (GEX), delta/vanna/charm exposure, SVI-calibrated volatility surfaces, and full Black-Scholes Greeks for 6,000+ US equities and ETFs. Delivered via REST API with a Python SDK. Free tier...
No description of Nullstack yet.
What each product offers, as listed by its team.


Possible disadvantages
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Full-stack with Nullstack - Part 3
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Recommendations tracked on public social media and blogs since March 2021.


I built FlashAlpha for this. GET https://lab.flashalpha.com/v1/vrp/{symbol} returns ATM IV, four matched RV windows (5d, 10d, 20d, 30d) using Yang-Zhang, the VRP for each, rolling z-score and percentile, put-call directional... - Source: dev.to / 6 months ago
FlashAlpha's Historical API changes that. The contract is simple: every live analytics endpoint, replayable at any minute since 2018-04-16, returned in the same response shape. One query parameter — at — and you get what GEX, DEX, VEX,... - Source: dev.to / 7 months ago
Tracking Nullstack since Apr 2021.
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