Counterfactual
Test an idea against a world that can prove you wrong
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Built with GPT-6 Astra in Codex, Counterfactual is a transport experiment lab where ideas face reproducible tests. Discover why a shortcut can slow everyone down, design custom networks, search road closures and upgrades, and challenge results across traffic levels. Inspect the math and export the evidence. The public demo runs deterministic simulations; live Astra hypothesis generation is optional and not connected in this release.
PH · launched Sep 18, 2026 · 1 upvote (top 69%) · 0 views
Niche: physics and engineering simulation software · 104 launches, 8 in the last 7 days ▲ +14% · Explore this niche →
Category and tags
- Horizontal
- Analytics & BI
- B2B
- AI-native
- Commercial product
- Education
- OpenAI Day
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More like this: all 104 launches in physics and engineering simulation software →
Could you build this?
Partial A web interface visualizing traffic networks is simple to prototype, but accurate microscopic or macroscopic counterfactual traffic flow simulation (e.g., demonstrating Braess's paradox with equilibrium math) relies on specialized transport algorithms.
What it would actually take: The stack would involve a Python or C++ simulation engine (such as SUMO or custom network equilibrium solvers computing Wardrop's user equilibrium) paired with a reactive frontend (React, Deck.gl/Mapbox). The hard part is implementing robust, convergent traffic assignment algorithms that accurately model network dynamics, congestion games, and elastic demand. This requires transport engineering and mathematical optimization expertise to ensure simulations reflect valid game-theoretic outcomes rather than simplistic heuristics.
Competitors
Other products that read as similar to this one : 44 launches clear the similarity bar, closest 8 shown.
Attention rank: #21 of 45 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 255 days after the earliest competitor.
- Continuity Atlas · ph · 2026-09-18 · 2 upvotes · similarity 0.46
- CodaBridge · ph · 2026-09-18 · 60 upvotes · similarity 0.44
- BDB × GPT-6 Astra · ph · 2026-09-18 · 1 upvotes · similarity 0.43
- Astraea - Agents Accelerating clinical trials. · yc · 2026-05-14 · 63 upvotes · similarity 0.42
- Astra Scientist · ph · 2026-09-18 · 2 upvotes · similarity 0.42
- WhyLab · ph · 2026-09-18 · 1 upvotes · similarity 0.38
- GPT-6 Astra+ChatGPT Work Can Do This Now · ph · 2026-09-22 · 1 upvotes · similarity 0.38
- RoboRat Studio™ · ph · 2026-09-18 · 1 upvotes · similarity 0.38
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