HRAG

HRAG

hRAG is a self-hosted hybrid Retrieval-Augmented Generation (RAG) platform that combines Postgres BM25, vector search, and optional cross-encoder reranking to produce grounded, streamed answers with open citations. It targets teams and operators who want reproducible, benchmarked enterprise document search and the ability to run the full stack locally or on modest cloud infra.

HRAG is recruitment & hr software teams evaluate for recruitment & hr. Use this page to review pricing, integration signals, and the best alternatives before you commit.

Paid Enterprise 70/100
One of 146 tools in Recruitment & HR
Added 2 months ago
Data reviewed Aug 20, 2026

Profile facts come from the vendor source. AiMatch labels unknown pricing or API details instead of estimating them.

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Quick Overview

Best for: Recruitment & HR

What it does

Recruitment & HR software for decision-makers comparing workflow fit and alternatives.

Best fit

Recruitment & HR

Pricing snapshot

Paid from €116 per month (reported cost for the entire five-node Hetzner cluster described on the site)

Next step

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hRAG (hybrid Retrieval with Receipts) is a self-hosted hybrid RAG platform designed for reproducible, grounded answers over large enterprise-style document corpora. It runs retrieval (BM25) and vector search inside Postgres, supports an optional cross-encoder reranker, and streams answers with open citations so each bracketed source opens to the exact backing chunk. The product is aimed at teams and operators who want to run and reproduce benchmarks, keep data isolated via Postgres row-level security, and deploy the stack on modest infrastructure (the authors report a five-node Hetzner cluster at €116/month). The site provides a public 512K-document playground (no login) and instructions plus MIT-licensed repos to build and run the platform yourself.

Self-hosted hybrid RAG on a €116/month cluster — Postgres, BM25, vectors, a reranker, and a public benchmark score for every claim.

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Key Features

BM25 inside Postgres

Uses Postgres text search (pg_textsearch) with real IDF ranking and Block-Max WAND to achieve fast lexical retrieval without maintaining a separate search cluster (88ms over 2M chunks reported).

Hybrid vector + lexical fusion

Combines vector and lexical retrieval with a weightedFusion approach; authors report a 0.3 vector weight produced better results than equal weighting.

Optional cross-encoder reranker

A separate service reads query and chunk together to reorder retrieval windows; reported to improve benchmark score (+3.9) but adds latency (example: ~16 seconds on 2 vCPUs) and ships as an optional checkbox.

Grounded answers and refusal behavior

Empty retrieval results in a refusal without calling the model; on benchmark 'info-not-found' questions the system returns correct refusals where others hallucinate.

Streaming citations

Sources arrive before the first token so every citation bracket in an answer opens to the exact chunk that backs it; streaming of sources is emphasized.

Tenancy via Postgres row-level security

Per-tenant isolation is enforced by Postgres transactions and row-level security so sandbox and benchmark corpora cannot access each other.

Small-model, cost-conscious setup

Advocates for small embedders (118M) and budget answerers to reduce cost; authors publish receipts and per-answer cost claims (tenths of a cent).

Open source & reproducibility

All code MIT; benchmark runs, raw results, and negative results are published in the repo so numbers can be verified.

Pricing

Free Tier Available

Public 512K-document playground available to everyone with no login; private sandboxes require Google or GitHub sign-in and are limited (10 documents, 20 pages each)

Self-hosted five-node cluster (example)

€116 per month (reported cost for the entire five-node Hetzner cluster described on the site)
  • Postgres with vectors and BM25
  • Four services: ingest, embed, rerank, answer
  • Reproducible benchmark score and receipts

Use Cases

Enterprise document search

Search and answer across simulated or real company documents (Slack threads, emails, wikis, tickets) with tenant isolation and grounded citations.

Benchmarking and reproducible evaluation

Run and reproduce EnterpriseRAG-Bench (512K documents) submissions and inspect raw results and receipts to validate retrieval and answer quality.

Self-hosted deployments for cost control

Operators who want predictable, low-cost deployments can run the five-node Hetzner setup or adapt the provided repos to their infrastructure.

Private sandboxing and development

Developers and teams can use private sandboxes (Google/GitHub sign-in) with controlled document and token budgets to test on their own data.

Integrations

Postgres (pg_textsearch + vectors)

Primary storage and retrieval engine for BM25, vectors, text, and tenant row-level security.

Google / GitHub sign-in

Used to create private sandboxes for users who want to test with their own documents.

Hugging Face (leaderboard)

Public leaderboard and benchmark runs are published on Hugging Face (leaderboard referenced on the site).

Benefits

Reproducible, benchmarked retrieval with published receipts and raw results for verification
Low operational cost claims (authors report a five-node Hetzner cluster at €116/month and per-answer costs of tenths of a cent)
Strong data isolation via Postgres row-level security and tenant transactions, plus grounded streamed citations to trace answers to sources

Limitations

Cross-encoder reranker increases latency substantially (example: ~16 seconds on 2 vCPUs) and is therefore optional rather than default
Private sandbox limits: 10 documents of up to 20 pages each and a daily token budget
Site logs visits (IP, browser, country) to understand the audience (details and opt-out guidance in the repo), which may be a privacy consideration

Frequently Asked Questions

What am I actually chatting with?
The public playground is the EnterpriseRAG-Bench corpus of 512,000 simulated company documents (Slack, email, wikis, tickets); what you see on the playground is the exact corpus used for the benchmark.
Can I bring my own documents?
Yes — sign in with Google or GitHub to get a private sandbox (10 documents, 20 pages each) with a daily token budget; row-level security keeps your documents isolated.
How good is it, honestly?
Officially scored #9 on EnterpriseRAG-Bench (overall 44.74) with published per-category numbers and raw results; authors encourage verification by inspecting committed raw runs.
Why should I trust these numbers?
Every run's raw results are committed to the repo and the benchmark team re-scored the submission with near-identical retrieval results (example: recall 69.65 vs 69.6).
Can I run this myself?
Yes — the site provides articles that walk through every deployment step and MIT-licensed repos that build the platform from scratch.

Getting Started

  1. 1 Visit the public 512K-document playground (no login) to try the live system immediately
  2. 2 Sign in with Google or GitHub to create a private sandbox (limited to 10 documents, 20 pages each, daily token budget)
  3. 3 Follow the articles and the MIT-licensed repos which walk through every deployment step and benchmark reproduction to build the platform yourself

Support

docs

Articles on the site walk through deployments and benchmark reproduction step-by-step.

repository

MIT-licensed repos contain the code, benchmarks, raw results, and receipts to build and run the platform.

playground

Public 512K-document playground to test the live system and reproduce benchmark behavior without signing in.

API

Available: No

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