An API that catches what your LLM confidently got wrong
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HN · launched Apr 9, 2026 · 5 upvotes (top 89%) · 0 views
Niche: llm hallucination detection tools · 27 launches, 2 in the last 7 days · Explore this niche →
Category and tags
- Horizontal
- Observability & eval
- Developer
- AI-native
- Commercial product
Visit website ↗ Source listing ↗
More like this: all 27 launches in llm hallucination detection tools →
Could you build this?
Partial Wrapping an LLM call to cross-check another LLM output is trivial, but building a reliable, high-precision hallucination and error detection API requires specialized evaluation models, fact-checking datasets, and citation verification engines.
What it would actually take: A production hallucination detection service uses fine-tuned NLI (Natural Language Inference) models, external knowledge-graph retrieval, and calibrated token log-probability / entropy analysis. The hard part is providing deterministic, low-latency verification that doesn't simply suffer from the same hallucination pitfalls as the generation model it audits.
Discussion
2 comments analyzed.
Concerns raised: Performance in real production use cases unclear, Whether it actually catches hallucinations effectively
Competitors
Other products that read as similar to this one : 508 launches clear the similarity bar, closest 8 shown.
Attention rank: #457 of 509 (itself plus its competitors, highest first, normalized so YC and Product Hunt are compared fairly).
Launched 162 days after the earliest competitor.
- A tool to properly observe your LLM's context window · hn · 2025-10-30 · 8 upvotes · similarity 0.61
- KillSwitch · hn · 2026-09-19 · 10 upvotes · similarity 0.56
- LLM fine-tuning without infra or ML expertise · hn · 2026-01-21 · 5 upvotes · similarity 0.54
- ATO · hn · 2026-03-19 · 6 upvotes · similarity 0.54
- jevals · hn · 2026-09-20 · 47 upvotes · similarity 0.54
- Tokensift, an open-sourced token-efficiency linter for LLM prompts · hn · 2026-08-29 · 6 upvotes · similarity 0.54
- awesome-reasoning-generalization · github · 2026-09-10 · 143 upvotes · similarity 0.52
- BonzAI · hn · 2026-05-22 · 5 upvotes · similarity 0.52
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