Decision Support · Side-by-side
Compare pricing, strengths, and use cases so it is easier to pick the right fit.
Change tools
For everyday users, neither Haystack nor Zilliz is a ready-to-use app — both are developer tools. Haystack wins if you're a tinkerer who wants to build custom AI search or Q&A pipelines from scratch. Zilliz wins if you need a managed, high-speed database to store and search millions of vectors. The single biggest difference: Haystack is a framework for building AI workflows, while Zilliz is a database for storing AI data.
Haystack
Zilliz
Scores at a glance
Choose Haystack if
Choose Zilliz if
Key differences
Facts side by side
| Haystack | Zilliz | |
|---|---|---|
| Free plan | ||
| Mobile app | ||
| API access |
Common questions
No. Neither has a mobile app. Both are developer tools you use on a computer. Haystack runs locally via Python; Zilliz is a cloud database you access via API.
Neither is beginner-friendly without coding. Haystack requires Python. Zilliz requires API knowledge. If you don't code, look for a no-code AI tool like ChatGPT or a vector search plugin for your existing platform.
Yes, Haystack is better for that. It's specifically designed for Retrieval-Augmented Generation (RAG) — you can feed it your PDFs and get answers. Zilliz is just the database part; you'd still need a framework like Haystack to build the chatbot.
Only if you need to search millions of items at high speed. For a small business with a few thousand documents, a free vector database like Chroma or a simple search tool is cheaper and easier.
Yes. Haystack can use Zilliz as its document store (database). This gives you Haystack's pipeline-building power with Zilliz's high-speed vector search — but it's a complex setup for advanced users.
Zilliz has more built-in integrations with cloud AI models and frameworks (OpenAI, HuggingFace, etc.) and supports multiple programming languages. Haystack integrates with many models too but requires more manual configuration.
Haystack is a free, code-heavy framework for building custom AI search; Zilliz is a paid, cloud-based database for massive-scale vector search — neither is for non-technical users.
If you're a non-technical person looking for an AI tool you can use today, neither Haystack nor Zilliz is for you — they're both developer tools. But if you're willing to learn some Python, Haystack is the better starting point because it's free and lets you build custom search and Q&A for your own files. For developers building high-scale apps, Zilliz is the powerhouse database.
