Freedom251 › LLM Application Development Frameworks
Haystack
What Haystack is
Haystack is an open-source framework for building AI agents, multimodal applications, advanced retrieval systems and scalable search. It is designed for developers who need to assemble AI applications from separate components rather than a single fixed workflow. Its modular pipelines can include retrievers, routers, memory layers, tools, evaluators and generators. Use cases include agent workflows, advanced RAG and multimodal applications. Pipelines can run on your own infrastructure and be served as REST APIs or MCP servers with Hayhooks. The integrations directory lists 189 integrations, including model providers, vector databases and monitoring tools, with named options such as OpenAI, Anthropic, Amazon Bedrock, Elasticsearch, Pinecone and Datadog. The separate Haystack Enterprise Platform adds a visual pipeline builder, debugging, templates, indexing, a playground, prompt exploration, deployment and monitoring. Enterprise deployment can be managed cloud or self-hosted. A free Enterprise trial is available by form request and includes cloud infrastructure for prototypes.
Who it suits
Haystack suits AI developers and engineers building modular, transparent systems for real-world enterprise environments. Its framework and Enterprise Platform offer options for teams deploying pipelines on their own infrastructure or managed cloud.
What it does well
- Free, open-source Python framework.
- 189 listed integrations across several tool categories.
- Pipelines can be served as REST APIs or MCP servers.
- Supports hybrid search, reranking and RAG workflow building.
What to know first
- Enterprise trial requires a form request.
Plans
| Plan | Billed and limits | Price |
|---|---|---|
| Haystack Open Source Framework | Open-source Python framework; no paid plan price stated on the pages reviewed | Free |
| Haystack Enterprise Platform | Platform pricing not stated on the pages reviewed | On request |
As haystack.deepset.ai lists them, read 7 Oct 2026. The maker's own page has the final word.
Verdict
Haystack provides a free framework for assembling AI systems from modular pipelines, with integrations and self-hosted deployment options.
Facts from Haystack's own pages
- Company
- Haystack is built by deepset, whose about page says it developed Haystack in 2020 and lists its Berlin headquarters. · deepset.ai, 7 Oct 2026
- Deployment
- Pipelines can be served as REST APIs or MCP servers with Hayhooks and run on your own infrastructure. · haystack.deepset.ai, 7 Oct 2026
- Deployment options
- The Enterprise Platform can be deployed to managed cloud or self-hosted infrastructure and exposes a REST API. · deepset.ai, 7 Oct 2026
- Enterprise platform
- The Haystack Enterprise Platform includes a visual pipeline builder, debugging, templates, data indexing, a playground, prompt exploration, deployment, and monitoring tools. · deepset.ai, 7 Oct 2026
- Examples of integrations
- Listed integrations include OpenAI, Anthropic, Amazon Bedrock, Elasticsearch, Pinecone, and Datadog. · haystack.deepset.ai, 7 Oct 2026
- Founded
- 2018 · haystack.deepset.ai, 28 Sept 2026
- Free trial
- The maker offers a free trial of the Haystack Enterprise Platform, accessed by filling out a form; the page does not state a trial duration. · deepset.ai, 7 Oct 2026
- Headquarters
- Berlin, Germany · haystack.deepset.ai, 28 Sept 2026
- Installation
- The maker's quick-start page installs Haystack with pip using the package name haystack-ai. · haystack.deepset.ai, 7 Oct 2026
- Integrations
- The integrations directory lists 189 integrations, including model providers, vector databases, monitoring tools, and community-built components. · haystack.deepset.ai, 7 Oct 2026
- Intended users
- Haystack is built for AI developers and engineers creating accurate, modular, transparent AI systems for real-world enterprise environments. · haystack.deepset.ai, 7 Oct 2026
- Modular pipelines
- Haystack structures applications as modular pipelines with components such as retrievers, routers, memory layers, tools, evaluators, and generators. · haystack.deepset.ai, 7 Oct 2026
- Platform security
- The Enterprise Platform page lists SOC 2 Type II, ISO 27001, GDPR, HIPAA, and CSA Star Level 1, along with RBAC, audit logs, SSO, and cloud or self-hosted deployment. · deepset.ai, 7 Oct 2026
- Security and compliance
- The Enterprise Platform page lists SOC 2 Type II, ISO 27001, GDPR, HIPAA, and CSA Star Level 1, along with RBAC, audit logs, traces, guardrails, and SSO. · deepset.ai, 7 Oct 2026
- Support
- deepset offers private, secure engineering support, deployment guides, and flexible services for Haystack framework customers. · haystack.deepset.ai, 7 Oct 2026
- Trial
- A free Enterprise Platform trial is offered by form request and includes built-in cloud infrastructure for building and testing prototypes. · deepset.ai, 7 Oct 2026
- Use cases
- Haystack supports agent workflows, advanced RAG, multimodal applications, and scalable search systems. · haystack.deepset.ai, 7 Oct 2026
- What it does
- Haystack is an open-source AI orchestration framework for building production-ready AI agents, multimodal applications, and advanced RAG systems. · haystack.deepset.ai, 7 Oct 2026
- Who it is for
- Haystack is built for AI developers and engineers creating accurate, modular, and transparent AI systems. · haystack.deepset.ai, 7 Oct 2026
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