h5i
Build and formally verify web apps with Rust and Lean 4
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h5i is a Rust web framework built on Axum that brings formal verification with Lean 4 into everyday web development, alongside integrated red-teaming and CI/CD tools. It's designed for Rust developers and teams building AI-generated or security-critical applications. As AI makes coding faster, ensuring correctness becomes increasingly important. h5i helps developers prove critical properties and discover vulnerabilities that traditional testing alone might miss.
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PH · launched Oct 24, 2026 · 1 upvote (top 67%)
- Horizontal
- Dev tools
- Developer
- Not AI
- Hobby / open-source project
- Open Source
- Software Engineering
- Developer Tools
Similar launches
See all 70 similar launches →Could you build this?
No Making Lean 4 formal verification part of everyday web development requires expertise in proof assistants and formal methods that vibe coding cannot supply.
What it would actually take: A real version needs a Rust framework on Axum plus a bridge that compiles or checks application properties in Lean 4, which means someone who understands dependent type theory and can design usable specification languages. It also needs red-teaming and CI tooling that is credible to security teams. The main resource requirement is formal-methods researchers and senior Rust engineers, not just app code.
Competitors
Other products that read as similar to this one : 70 launches clear the similarity bar, closest 8 shown.
Attention rank: #39 of 71 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 354 days after the earliest competitor.
- Lasm · hn · 2026-10-30 · 36 upvotes · similarity 0.44
- LeanCIL · github · 2026-10-14 · 49 upvotes · similarity 0.42
- Secure Core FFI · ph · 2026-09-14 · 1 upvotes · similarity 0.41
- ApexSovereign · ph · 2026-09-22 · 1 upvotes · similarity 0.40
- Bloodhound · hn · 2025-12-09 · 5 upvotes · similarity 0.40
- Rusdantic · hn · 2026-03-30 · 5 upvotes · similarity 0.39
- Formally verified 3D CSG: Trust 93 lines spec, not 1000 lines AI code · hn · 2026-07-28 · 115 upvotes · similarity 0.39
- Fusor · hn · 2026-09-27 · 10 upvotes · similarity 0.38
Other launches for this product
- No other launches for this product.