Naftali Rumpaisum

Naftali Rumpaisum

Solo founder. Find Feny + ReadReceipt.

About

Flexitarian. Spent years travelling with vegans and watched the same problem repeat. The sad salad at the end of a long search. The waiter who said vegan and meant something else. Built Find Feny because the decision layer did not exist. Also building ReadReceipt: know when your proposal was opened and which pages they read. What I am building: Find Feny: free vegan signal tool for travellers. findfeny.com Feny Verify: ingredient verification for vegan travellers. Coming to iOS. ReadReceipt: document tracking for proposals and contracts. Solo, bootstrapped. Happy to talk about any of it.

Badges

Gemologist
Gemologist
Tastemaker
Tastemaker
Gone streaking
Gone streaking
Gone streaking 5
Gone streaking 5

Maker History

  • ReadReceipt
    ReadReceiptKnow the moment your PDF is opened.
    Apr 2026
  • Feny Verify
    Feny VerifyScan any product. Know if it it's vegan.
    Nov 2025
  • 🎉
    Joined Product HuntNovember 2nd, 2025

Forums

🔥 Get more points by launching on Alpha Day

We re trying something new on Thursday: Alpha Day.

The idea is simple. If this is the first time you re launching your product anywhere, you can tag it alpha and get a boost to your points (and land on a special leaderboard).

When do you follow up after sending a proposal?

I ve been thinking about this a lot recently

Sending is one thing, but knowing when to follow up feels like the hardest part

Too early feels pushy
Too late and the deal is gone

Curious how others approach it
Do you have a system or go by feel?

ReadReceipt - Know the moment your PDF is opened.

You sent the proposal. You followed up. You're still waiting. ReadReceipt tells you the moment your PDF is opened — and which pages they actually spent time on. No guessing. No awkward follow-ups. Just information. £8/month. Built for solo founders.
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