Tessera Alpha vs OptionSpace

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

Tessera Alpha compared with OptionSpace
Detail	Tessera Alpha	OptionSpace
What it does	Stock ratings for US stocks based on published research signals	Volatility data and research tools powered by a market-maker-grade fitting and pricing engine
Stage	Startup	Not given
Founded	2025	Not given
Based in	PL	US
Pricing model	Freemium	Freemium
Pricing	Free plan with limited access to 200 largest stocks. Paid Tessera plan: $2 for first month, then $29/month, billed monthly. Cancel anytime. 30-day money-back guarantee.	Free sample plan with no card required. Retail subscription available for individual personal use in the United States with daily limits on API credits. Institutional plans available at contact pricing for any business use with annual licenses invoiced monthly via ACH or wire. Higher-frequency data
Key features	Six published research signals averaged into stock ratings Free access to ratings on the 200 largest US stocks Company financial analysis and sector comparisons Stock screening on valuation, profitability, growth and momentum Rules-based paper portfolio tracking with simulated trading Custom paper portfolios with historical backtesting Analyst estimates and DCF valuation tools CSV export for custom analysis Rating changes tracked weekly by signal	Fitted volatility surfaces with bid-ask-weighted curves across every expiration Accounts for American-style options with early exercise, discrete dividends, and implied borrow rates One-minute granularity historical data across 140+ symbols spanning 10 years Realized volatility calculations from 385 intraday returns per day Vol Screener, Vol Premium, Skew Scanner, and Earnings Vol analysis tools Historical simulation using actual bid-ask prices and fitted vol surfaces Python package for research workflows Interactive visual dashboards for surface inspection and event studies Model Context Protocol (MCP) integration for AI agent workflows Greeks and constant-maturity metrics via API and dashboards
What makes it different	Connects stock screening with company research and paper portfolio tracking in one workspace Ratings based on six published academic research signals, not proprietary black boxes Free access to research on largest 200 stocks, no credit card required Educational research and ranking signals, explicitly not investment advice Affordable paid plan at $2 first month then $29/month with backtesting and full universe access	Arbitrage-free fitted volatility wings extending beyond quoted book using Lee-moment discipline Accessible to quantitative researchers and AI workflows through Python, API, and MCP without requiring market-maker infrastructure 10 years of consistent historical data at one-minute granularity across 140+ symbols for rigorous backtesting
Community votes	0	0
DR (Domain Rating by Ahrefs)	4 −1 (down) since last check	Not checked yet no change since last check
Trust Flow (Majestic)	3	0
Citation Flow (Majestic)	19	0
Referring domains (Majestic)	9	0

6 details filled in for both companies.

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