I built a product around grief. The real product was somewhere else.

A few years ago, I lost my father. I never had the chance to say goodbye. Twenty years later, I felt the need to write him a letter. A real one, on paper. When I finished, a strange question came to mind: "If heaven existed, how would I send this letter to him?"
That question stayed with me for months. Eventually, it became a product.

The first product and its limitations
I built KharonBridge around two separate spaces:
Write to a Loved One Who Has Passed Away: a private space to continue a symbolic conversation with someone you have lost.
Leave a Trace: a space where users can write a message intended to be delivered or reopened in the future, either by a loved one or by their future self.
The positioning was clear: memory, grief, and transmission.
The problem appeared very quickly.
Acquiring users around such an intimate topic is particularly difficult. People do not actively search for this kind of product. They may need it, but they often do not know it yet. My personal network could not authentically test a product that requires a genuine experience of grief. Former business partners viewed the project through a professional lens rather than as potential users. Out of roughly twenty emails sent to friends, family, and professional contacts, I learned more from the people who did not respond than from those who did.
Accounts were created.
But there was very little real usage.
The result: a functional platform, a real problem being solved, but an acquisition challenge that was almost impossible to overcome.

The pivot
While working on the final version of the PWA, I realized something that would change the direction of the project. The people who were most critical of KharonBridge rarely used the grief-related space.
Almost all of them created accounts in the "Leave a Trace" space.
Not to talk about death. Not to process grief. They wanted to write to their future selves. To preserve an important idea. To revisit a reflection several months later. To pass something on to someone without yet knowing when.
What I considered a secondary feature was actually solving a much broader problem. That is where Le Carnet was born.
Le Carnet is neither a digital diary nor a productivity tool. It is a private space to capture, organize, rediscover, and transmit what truly matters: ideas, decisions, reflections, doubts, memories, with the ability to send them forward in time through a time capsule. At that point, I made a structural decision:
Le Carnet would become the primary product.
The "Write to a loved one who has passed away" space remains part of KharonBridge, but it is now aimed at a more specific audience through direct relationships with psychologists, grief associations, and bereavement professionals.

Where I am today

• Solo founder based in Portugal
• KharonBridge in public beta
• Le Carnet positioned as the main product
• No external funding
• Personally financing development, infrastructure, and marketing
• Long workdays while maintaining a consulting business in parallel
• Outreach underway with grief associations and psychologists in France, Belgium, and Switzerland

My current problem: organic acquisition
The pivot is clear. Le Carnet exists.
But I am now facing a wall that many founders probably know well.
Organic acquisition through Instagram and social media is not gaining traction.
The usual mechanics, viral content, hashtags, product storytelling, do not translate easily to a private writing tool.
By definition, people do not publicly share what they write in an intimate space. The feedback is often positive when people discover the product. Yet that curiosity does not naturally convert into visibility or acquisition. Two products. Two audiences.
One conviction: Private writing and transmission through time address a real need that remains largely underserved.
The most important lesson I have learned so far:
Sometimes the real product is hidden inside the one you thought you were building.

My question
Have you ever built a product around a topic that was too intimate to be shared publicly? How did you generate your first organic acquisitions when you could not rely on the traditional mechanics of social media?

https://kharonbridge.com