Ever searched the Bible for a concept you couldn't quite put into words? Biblos uses semantic search to help you find passages by meaning, not just keywords — so a search like "how to deal with anxiety" surfaces relevant verses even if the word "anxious" never appears.^1
Built on a Retrieval Augmented Generation (RAG) architecture, Biblos pairs vector-based search over the entire Bible (World English Bible translation) with AI-powered summarization from Anthropic's Claude. Type a topic and it retrieves the most semantically related passages, then generates a contextual summary grounded in the text it found — not from outside sources.^2 You can also load specific references like "John 3:16" or "Psalm 23" for instant lookup.^3
What sets Biblos apart is its layered study approach. For New Testament passages, it displays the Greek text alongside definitions from the Dodson Greek Lexicon. It also integrates Church Fathers' commentaries — voices like Augustine and Chrysostom offering historical theological perspective on the passages you're studying.^2
Why Christians Love It"Playing with this a bit more, and it is very cool! One thing I like is that it provides the source text, so you can verify whether the summary is accurate." — Hacker News user^4
"Bible study just got more lit." — Hacker News user^4
"Impressive. It actually gave useful results and summary for annihilationism." — Hacker News user^4
Notable- Open source on GitHub (CC BY-NC 4.0) with 225+ stars and community contributions^2
- Featured on Hacker News "Show HN" with 136 points and 84 comments^4
- Created by developer Jon Boldt as a free, no-ads, no-tracking Bible study tool^3
- Also accessible at bibleread.app^3
- Uses BGE-large embeddings via Chroma for vector search, with a modular design that allows swapping components^2
