Brand Foundation
About Nalarasa
Nalarasa Lab is a digital product studio dedicated to one thing: turning behavioral intervention into real, usable digital tools.
The name
Nalarasa comes from two Indonesian words: nalar (reason, logic, the way we think) and rasa (feeling, intuition, empathy). Neither stands in opposition to the other. Every human decision needs both.
Public name
Nalarasa Lab is the name used across all public platforms. The registered legal entity is PT. Nalarasa Intervensi Digital.
Mission
There is already a wealth of research in psychology and behavioral science that most people never get to benefit from, because it stays locked in academic literature. We translate what is already known into tools people can use day to day.
Position
A digital product studio grounded in psychology. Nalarasa is the parent brand behind every product and service. Each product is built on research that already exists, not assumptions.
Tagline
Nalar. Rasa. Digital.
Primary hook · two Indonesian words
Guided by logic. Grounded in love.
Supporting line · English
Portfolio
Our Products
Each product carries its own identity and speaks to its own audience, while sharing the same foundation: existing research, translated into something usable.

Runtut
An offline-first app built on metacognition frameworks, helping people make decisions more consciously and discover patterns in how they actually think.
de.Think
A decision tool for founders. Structured frameworks from decision science, local first by default.
Kenala, HAKU
More products are in the works, all rooted in the same approach: behavioral change does not need to be a lecture. It can be a tool you actually want to use.
Try the idea first
Two free calibration tests
Both products start from the same question: how close does your confidence sit to your accuracy? Each has a three minute test you can take right now. No account, and your score appears straight away.
Ten questions about the world, then a look at how your confidence compared to what turned out to be true. Built for everyday decisions about work, money, and relationships.
Ten questions about companies and markets, scored the same way. Built for founders and operators who make decisions with real cost attached.
What calibration means
If you say you are 80 percent sure about ten things, about eight of them should turn out true. Most people say 80 percent and get five or six. The distance between how sure you feel and how often you are right is your calibration gap. It shows up in every forecast you make about your own life and work, and almost nobody measures it.
Where We Are
Early stage, building carefully
We are an early-stage studio, and we would rather say so plainly than appear larger than we are. Honesty builds trust faster.
Every claim we make should trace back to existing research. What we cannot support, we do not say. Read more about us
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