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haystack.deepset.ai

Haystack is an open-source framework for building and orchestrating AI applications, including agents, retrieval-augmented generation systems and scalable search workflows. Developers combine model generators, tools and other components, then configure how information moves through an application.

Explore the practical guide ↓

Independent OpenViST project profile, based on linked sources.

haystack.deepset.ai — OpenViST project profile in Agent Frameworks.
OpenViST project illustration. See the linked sources for product details.
Understand the project

Practical overview

When it fits

Use Haystack when you need a developer framework to compose AI models, retrieval components and tools into a configurable agent or application workflow.

Who it is for

  • Developers building AI agents that can use tools such as web search.
  • Teams creating retrieval-augmented question-answering and search applications.
  • Practitioners who want to configure multi-step workflows, agent state or tool behavior.

Documented uses

  • Build an agent that can decide whether to call a tool when answering a question.
  • Create retrieval-based applications grounded in documents or other indexed content.
  • Configure tool outputs and agent state so retrieved information can be used in later reasoning steps.
  • Inspect streamed responses and tool activity while developing an agent workflow.
Before you choose

Requirements & limits

The project is labeled open-source. The documented quick start installs the Python package with pip.

  • The framework requires developers to select and configure model providers, tools and credentials for their application.
  • The quick-start web-search example needs both a model-provider credential and a SerperDev API key.
  • Tutorials cover different levels, from beginner retrieval workflows to advanced agents and multi-agent systems.

Check current requirements in the official documentation. Source-based guidance does not mean OpenViST has run or independently tested this project.

Source-based practical guide

Set up a basic Haystack web-search agent

Install Haystack and configure the documented starter example that connects an agent to a model and web-search tool.

Before you start

  • Python environment suitable for installing Haystack with pip.
  • A credential for the chosen model provider; the example uses OpenAI.
  • A SerperDev API key for the web-search component.

Steps

  1. Install Haystack with the command below.

    Documented command
    pip install haystack-ai

  2. Set the model-provider and SerperDev API keys as environment variables.

  3. Create a SerperDev web-search component and wrap it as an agent tool.

  4. Configure an Agent with a chat generator and the search tool, then provide a user question.

Expected outcome

A configured agent can decide whether to use the web-search tool and return a response to the question.

Guide limitations

  • The example depends on credentials for the selected model provider and SerperDev.
  • The guide documents a starter configuration, not deployment or production-readiness procedures.
Documentation 1 ↗
COMPARE OPTIONS

Compare options for Agent orchestration

These projects document a common task and share a project role. This is a source-based comparison, not an execution benchmark or a guarantee of interchangeability.

ProjectDocumented purposePlatformAccess and requirements
haystack.deepset.aiBuild an agent that can decide whether to call a tool when answering a question.The project is labeled open-source. The documented quick start installs the Python package with pip.
AgeniteDefine typed tools with JSON Schema validation and error handling.CLI
VeldraCreate an agent with a policy, tools, skills, knowledge base and reasoning method.Self-hostedThe documented deployment is self-hosted and uses a sign-in gate after a first-run administrator account is created.
Evidence and transparency

Sources & review

haystack.deepset.ai ↗Guide documentation ↗
Source record details
Source availability
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Sources checked
12 October 2026
Original website title
Haystack | Open-Source AI Framework for Production-Grade Agents · Official homepage title · retained in its source language
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