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HN · launched Nov 14, 2025 · 5 upvotes (top 90%) · 0 views
Niche: prediction market platforms · 44 launches, 2 in the last 7 days · Explore this niche →
Category and tags
- Fintech
- Analytics & BI
- Prosumer
- Not AI
- Commercial product
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More like this: all 44 launches in prediction market platforms →
Could you build this?
Partial The front-end comparison tables and arb scanner UI are straightforward, but maintaining low-latency websocket connections across multiple prediction markets (Kalshi, Polymarket) to calculate real-time arbitrage before prices change requires solid data aggregation infrastructure.
What it would actually take: The architecture requires backend ingestion workers maintaining persistent WebSockets to Polymarket (order books/trades) and Kalshi's API, normalizing different contract specifications for the same underlying event. Redis is needed to maintain in-memory order books and compute cross-exchange spreads with fee adjustments in real time, serving updates to a Next.js/React frontend via server-sent events or websockets. The hardest parts are entity matching across platforms with differing resolution criteria and handling API rate limits/latency to ensure arbitrage alerts are timely.
Discussion
No comments on this launch.
Competitors
Other products that read as similar to this one : 511 launches clear the similarity bar, closest 8 shown.
Attention rank: #481 of 512 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 16 days after the earliest competitor.
- Oddpool: The institutional data layer for prediction markets · yc · 2026-05-11 · 42 upvotes · similarity 0.67
- Valence: Unified prediction markets trading platform · yc · 2026-03-05 · 12 upvotes · similarity 0.61
- Dome - A unified API for prediction markets · yc · 2025-10-29 · 68 upvotes · similarity 0.60
- US Publicly Traded Companies probabilities of default with public data · hn · 2025-11-13 · 7 upvotes · similarity 0.58
- Totalis - Parlay on Anything · yc · 2026-05-25 · 11 upvotes · similarity 0.57
- jev_stock · github · 2026-09-17 · 12 upvotes · similarity 0.56
- market-echo · github · 2026-09-13 · 29 upvotes · similarity 0.52
- MultipleLinearRegression-HomePrice · github · 2026-09-17 · 9 upvotes · similarity 0.51
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