Hey Product Hunt! 👋

I'm Guillaume, solo developer from France, and I built SignalWhisperBot because I was drowning in voice messages during meetings.

The problem:

My contacts send long Signal voice messages. I prefer reading to listening, but there was no transcription solution that worked within Signal.

The journey:

Started summer 2024, built the first version in 2 months as a side project alongside my freelance work.

Had 2 paying users in January, then one cancelled. I almost quit in March.

Then May happened. Multiple paying users. Consistent revenue. Validation.

Today:

Customers in 10+ countries, thousands of transcriptions monthly.

How it works:

→ Forward any Signal voice message to the bot

→ Get instant text transcription

→ Free tier available (10 messages or 10 minutes/month)

Key features:

→ 95-98% accuracy (Whisper V3 AI)

→ Immediate audio deletion (< 2 seconds)

→ Email routing - send transcriptions to colleagues

→ .txt export for meeting notes

→ EU-based, GDPR compliant

🎁 Special for Product Hunt:

Use code PRODUCTHUNT for 50% off your first month!

💬 Ask me anything about:

→ Building on Signal's infrastructure

→ Going from side project to profitable

→ Privacy-focused transcription architecture

→ Email routing for teams

→ The almost-quit moment in March

I'll answer every question!