Subth.ink
write something and see how many others wrote the same
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Hey HN, this is a small Haskell learning project that I wanted to share. It's just a website where you can see how many people write the exact same text as you (thought it was a fun idea).It's built using Scotty, SQLite, Redis and Caddy. Currently it's running in a small DigitalOcean droplet (1 Gb RAM).Using Haskell for web development (specifically with Scotty) was slightly easier than I thought, but still a relatively hard task compared to other languages. One of my main friction points was Haskell's multiple string-like types: String, Text (& lazy), ByteString (& lazy), and each library choosing to consume a different one amongst these. There is also a soft requirement to learn monad transformers (e.g. to understand what liftIO is doing) which made the initial development more difficult.
HN · launched Jan 19, 2026 · 92 upvotes (top 11%) · 0 views
Niche: collaborative social web experiments · 63 launches, 1 in the last 7 days · Explore this niche →
Category and tags
- Horizontal
- Search & retrieval
- B2C
- Not AI
- Hobby / open-source project
Visit website ↗ Source listing ↗
More like this: all 63 launches in collaborative social web experiments →
Could you build this?
Yes The functionality is minimal: a single input field that queries and updates a hash table or SQL/Redis database to count exact string matches.
Discussion
20 comments analyzed.
Competitors mentioned: r9k (similar duplicate-detection concept), 1,000,000 checkboxes (low-stakes community interaction)
Concerns raised: MD5 hash preimage recovery claims don't make cryptographic sense, Publishing hashes when thought count passes threshold won't recover sensible messages
Feature requests: Embeddings and similarity detection, Higher threshold before publishing hashes
Competitors
Other products that read as similar to this one : 158 launches clear the similarity bar, closest 8 shown.
Attention rank: #24 of 159 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 82 days after the earliest competitor.
- Learning Rust by writing a Markdown to HTML compiler · hn · 2026-07-29 · 25 upvotes · similarity 0.45
- AttaLambda: a language where types and data are made of untyped lambdas · hn · 2026-09-14 · 44 upvotes · similarity 0.42
- Quillium, the non-linear writing app · hn · 2026-04-02 · 5 upvotes · similarity 0.41
- A Haskell programmable-CAD environment, in the browser with WASM · hn · 2026-07-07 · 6 upvotes · similarity 0.40
- GlyphLang · hn · 2026-01-10 · 44 upvotes · similarity 0.40
- I'm not a PostgREST fan this is why I'm building an alternative · hn · 2026-09-09 · 5 upvotes · similarity 0.39
- Hsrs · hn · 2026-05-19 · 53 upvotes · similarity 0.39
- The Taka Programming Language · hn · 2025-12-03 · 12 upvotes · similarity 0.39
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