An early-warning system for your portfolio.
Built by an engineer who needed one.
Telumin is an early-warning system for your portfolio, built by an engineer who needed one.
Investors routinely earn less than the very funds and stocks they hold — not because they pick badly, but because they buy and sell at the wrong moments. Fear at the bottom, comfort at the top. The gap between market return and investor return is a behavior tax, and it compounds.
Telumin exists to cut that tax. Not by predicting the market — nobody honestly can — but by doing three unglamorous things relentlessly: watching what you own, remembering why you bought it, and telling you in dollars when either is threatened.
The principleThe engine comes to your data. Your data never goes to the engine — the free workbook runs entirely in your browser, and even with an account, Telumin syncs only what you choose. It never connects to your broker. There are no credentials to leak because we never ask for them.
We run the same engine on our own company. It watches our TLS certificates, our infrastructure, our signup funnel — with the same declare-a-watch, same three-role debate, same evidence rules. When our certificate dropped below its renewal threshold, the engine fired before it expired. If we would not trust it with our own business, we would not ask you to trust it with your portfolio.
Meet the founder

Thuan Le
Founder
Thuan built Telumin after watching smart investors keep losing to their own emotions — chasing pumps, panic-selling, holding theses long after the data turned. His conviction: discipline can be encoded. The system watches; you decide.
“If you can’t write down why you’re holding it, the system can’t defend it for you.”
White-Glove Support for Mission-Critical Operations
Our enterprise customers get dedicated support engineers, custom onboarding, and direct access to our engineering team.
- 24/7 priority support with 1-hour SLA
- Dedicated Customer Success Manager
- Custom integration development
- Quarterly business reviews
- Direct access to engineering team
- Custom onboarding & training
Talk to Our Team
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