Ragas
Observability & Evals · Free + paid
Evaluation framework for RAG pipelines
At a glance
- Made by
- VibrantLabs (vibrantlabsai)
- Korean
- None (English and a few others only)
- Available on
- CLI
- Open source
- Apache-2.0
- GitHub
- 16,016 stars · Apache-2.0
What is Ragas?
Ragas is a toolkit for evaluating and optimizing LLM applications. It objectively measures performance using LLM-based and traditional metrics. If you have no test dataset for evaluation, it automatically generates a test set covering diverse scenarios. It provides online monitoring to watch quality in production, and integrations with frameworks such as LangChain and observability tools.
- Objective evaluation metrics combining LLM-based and traditional metrics
- Automatic generation of test data for evaluation
- Online monitoring in production
- Integration with LLM frameworks such as LangChain and observability tools
- Feedback loop using production data
- Create an example RAG evaluation project with the ragas quickstart command
Who uses Ragas and for what
- Evaluating RAG system quality (context precision, recall, faithfulness, etc.)
- Evaluating AI agents, workflows, and prompts
Pricing
Open source + paid cloud-managed plans
Open-source edition is free, SaaS managed edition is a paid subscription based on usage/seats
Estimate based on AI knowledge - please verify on the official site
Combos that work well with Ragas
Verifying AI answers and SEO drafts
ChatGPT evaluates response quality against a question set and ground-truth evidence. In the LangSmith + Ragas + DeepEval combo, Ragas and DeepEval score hallucination, groundedness, and consistency, and LangSmith tracks them. Responses below the threshold are not published automatically; the prompts, search, and data are fixed instead.
Cost: API pay-as-you-go + subscription (ChatGPT) / open source + paid managed cloud plan
Verifying AI answers and SEO drafts
Claude evaluates response quality against a question set and ground-truth evidence. In the LangSmith + Ragas + DeepEval combo, Ragas and DeepEval score hallucination, groundedness, and consistency, and LangSmith tracks them. Responses below the standard are not published automatically, and the prompts, retrieval, and data are fixed.
Cost: Freemium (free + paid subscription) + API pay-as-you-go / open source + paid managed cloud plan
Verifying AI answers and SEO drafts
Gemini evaluates response quality against a question set and ground-truth evidence. In the LangSmith + Ragas + DeepEval combo, Ragas and DeepEval score hallucination, groundedness, and consistency, and LangSmith traces them. Responses that fall below the standard are not published automatically; prompts, retrieval, and data are revised instead.
Cost: Freemium (free + paid subscription) + API pay-as-you-go / open source + paid managed cloud plan
Verifying AI answers and SEO drafts
DeepSeek evaluates response quality against a question set and ground-truth evidence. In the LangSmith + Ragas + DeepEval combo, Ragas and DeepEval score hallucination, groundedness, and consistency, and LangSmith traces them. Responses that fall below the standard are not published automatically; prompts, retrieval, and data are revised instead.
Cost: Open source (free) + API pay-as-you-go / open source + paid managed cloud plan
Verifying AI answers and SEO drafts
Perplexity evaluates response quality against a question set and ground-truth evidence. In the LangSmith + Ragas + DeepEval combo, Ragas and DeepEval score hallucination, groundedness, and consistency, and LangSmith traces them. Responses that fall below the standard are not published automatically; the prompts, retrieval, and data are fixed.
Cost: Freemium (free + paid subscription) / open source + paid managed cloud plan
Verifying AI answers and SEO drafts
Grok-2 evaluates response quality against a question set and ground-truth evidence. The LangSmith + Ragas + DeepEval combo has Ragas and DeepEval score hallucination, groundedness, and consistency, while LangSmith handles tracing. Responses below the standard are not published automatically; the prompts, retrieval, and data are fixed instead.
Cost: Subscription (including X subscription) + API pay-as-you-go / open source + paid managed cloud plan
Verifying AI answers and SEO drafts
Llama evaluates response quality against a question set and ground-truth evidence. In the LangSmith + Ragas + DeepEval combo, Ragas and DeepEval score hallucination, groundedness, and consistency, and LangSmith traces the results. Responses below the threshold are not published automatically; the prompts, retrieval, and data are fixed instead.
Cost: Open source (free, license conditions apply) / Open source + paid managed cloud plan
Verifying AI answers and SEO drafts
Mistral evaluates response quality against a question set and ground-truth evidence. In the LangSmith + Ragas + DeepEval combo, Ragas and DeepEval score hallucination, groundedness, and consistency, and LangSmith traces the results. Responses below the threshold are not published automatically; the prompts, retrieval, and data are fixed instead.
Cost: Open source (free) + API pay-as-you-go / open source + paid managed cloud plan
AI tools similar to Ragas (alternatives)
Ragas vs. alternatives at a glance
| AI | Pricing | Combos on the map | Connected tools | Free | Cheapest monthly | Korean |
|---|---|---|---|---|---|---|
| Ragas | Free + paid | 10 | 5 | — | — | No |
| Braintrust | Free + paid | 0 | 7 | Yes | $249/mo | No |
| DeepEval | Free + paid | 10 | 7 | — | — | No |
| EleutherAI LM Evaluation Harness | Free + paid | 0 | 7 | — | — | — |
| HumanEval | Free + paid | 0 | 7 | — | — | — |
1 of these 5 tools have a free plan. Cheapest paid plan: Braintrust ($249/mo).
Combo and connection counts are based on the relationships recorded on AI Galaxy Map (2026-10-26); they are not a quality ranking.
Ragas on AI Galaxy Map
- One of 27 AI tools in the Observability & Evals field.
- Connected to 5 other tools — #6 in its field.
- Part of 10 work combos recorded on the map.
Frequently asked questions
Can I use Ragas for free?
Open source + paid cloud-managed plans. Prices can change, so check the official site before paying.
What works well with Ragas?
Based on the combos on the map, there is a workflow such as "Verifying AI answers and SEO drafts" that uses it together with GPT, LangSmith, DeepEval.
What AI can I use instead of Ragas?
Tools that do the same job, such as Braintrust, DeepEval, EleutherAI LM Evaluation Harness, HumanEval, are connected to it on the map.
Can I use Ragas in Korean?
None (English and a few others only)
Sources (official pages)
Checked on the official pages on 2026-10-14. Prices and features can change, so check the official site again before paying.