# Haystack vs Pydantic AI

| Attribute | Haystack | Pydantic AI |
|---|---|---|
| **vioscaleAI score** | 65.8 (68% (medium)) | 65.5 (62% (medium)) |
| activity.commits_last_30d | 100 | 100 |
| adoption.dependent_repos | 237 | 0 |
| adoption.github_stars | 26,738 | 20,608 |
| adoption.package_downloads_weekly | 121,930 | 3,171,945 |
| content.faq | `[{"answer":"A Python-based orchestration tool for creating and deploying intelligent applications powered by language models. Developers assemble reusable components (data retrieval, model integration, tool execution) into customizable workflows, from question-answering systems to multi-step autonomous agents, deployable on private infrastructure or in the cloud. It is indexed under MLOps & LLMOps Tools.","source":"https://haystack.deepset.ai","question":"What is Haystack?","confidence":0.6},{"answer":"Haystack is open source, so it can be self-hosted and used at no licence cost. It is released under the Apache-2.0 licence. Paid editions are also offered: Enterprise Starter and Enterprise Platform, priced on request. Pricing changes often, so verify at source before relying on it.","source":"https://haystack.deepset.ai","question":"Is Haystack free to use?","confidence":0.6},{"answer":"We have confirmed browser-based access to Haystack. That is the extent of what we could verify from public sources, so it may well offer desktop or mobile clients we have not indexed.","source":"https://haystack.deepset.ai","question":"What platforms does Haystack support?","confidence":0.6},{"answer":"Yes. Haystack can be deployed cloud / SaaS, hybrid, on-premise and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://haystack.deepset.ai","question":"Can Haystack be self-hosted?","confidence":0.6},{"answer":"We have confirmed 21 integrations for Haystack, including OpenAI, Anthropic, Mistral, Hugging Face, Weaviate, Pinecone, Elasticsearch and AstraDB, plus 13 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://haystack.deepset.ai","question":"What does Haystack integrate with?","confidence":0.6},{"answer":"Yes. Haystack is published under the Apache-2.0 licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/deepset-ai/haystack","question":"Is Haystack open source?","confidence":0.95}]` | `[{"answer":"A comprehensive toolkit combining an open-source Python agent development framework with a managed observability platform designed specifically for AI applications, including monitoring, evaluation, and LLM gateway capabilities. It is indexed under MLOps & LLMOps Tools.","source":"https://pydantic.dev/articles/ai-observability-pricing-comparison","question":"What is Pydantic AI?","confidence":0.6},{"answer":"Pydantic AI is open source, so it can be self-hosted and used at no licence cost. It is released under the MIT licence. A commercial or hosted edition starts at $2. Prices are published openly on the vendor's own pricing page. Pricing changes often, so verify at source before relying on it.","source":"https://pydantic.dev/articles/ai-observability-pricing-comparison","question":"Is Pydantic AI free to use?","confidence":0.6},{"answer":"Pydantic AI supports the web and a command-line interface. Platforms we have not confirmed are simply not listed here rather than ruled out.","source":"https://pydantic.dev/articles/ai-observability-pricing-comparison","question":"What platforms does Pydantic AI support?","confidence":0.6},{"answer":"Yes. Pydantic AI can be deployed cloud / SaaS and self-hosted, so it does not have to run on the vendor's infrastructure.","source":"https://pydantic.dev/articles/ai-observability-pricing-comparison","question":"Can Pydantic AI be self-hosted?","confidence":0.6},{"answer":"We have confirmed 10 integrations for Pydantic AI, including Pydantic AI, Pydantic Evals, OpenTelemetry, Model Context Protocol (MCP), Snowflake, FastAPI, OpenAI and LangChain, plus 2 more. This is what we could verify from public sources, so the vendor may support others we have not indexed.","source":"https://pydantic.dev/articles/ai-observability-pricing-comparison","question":"What does Pydantic AI integrate with?","confidence":0.6},{"answer":"We have independently confirmed SOC 2, HIPAA and GDPR for Pydantic AI. Certifications we do not list are ones we have not been able to verify from public sources, which is not the same as Pydantic AI not holding them. Always confirm compliance directly before you rely on it.","source":"https://pydantic.dev/security","question":"What security certifications does Pydantic AI have?","confidence":0.7},{"answer":"Yes. Pydantic AI is published under the MIT licence, a permissive licence that generally allows commercial use and modification. Licence terms can change between releases, so verify against the repository for the version you intend to use.","source":"https://github.com/pydantic/pydantic-ai","question":"Is Pydantic AI open source?","confidence":0.95}]` |
| deployment.options | `{"cloud":true,"on_prem":true,"self_hosted":true}` | `{"cloud":true,"on_prem":true,"self_hosted":true}` |
| description.long | A Python-based orchestration framework for building production-ready AI applications with modular pipelines, agent workflows, and retrieval-augmented generation (RAG). Provides explicit control over retrieval, reasoning, memory, tools, and generation components, supporting everything from simple semantic search to complex multi-step agent systems. | An observability and development platform for production AI agent systems that combines tracing, evaluation, and inference gateway capabilities for building reliable LLM applications. |
| features.capabilities | `{"role":"platform","evaluation":true,"managed_cloud":true,"model_serving":true,"pricing_model":"free_open_source","self_hostable":true,"multi_provider":true,"vpc_deployment":true,"otel_compatible":true,"no_train_on_data":"unknown","llm_observability":true,"prompt_management":true,"framework_agnostic":true,"architecture_paradigm":"graph_based_cycles","mit_or_apache_permissive_oss_license":true,"native_observability_and_trace_logging":true,"native_memory_and_state_persistence_layer":true,"tool_calling_and_function_schema_validation":true,"managed_cloud_runtime_infrastructure_offered":true,"dynamic_agent_generation_and_spawning_at_runtime":true}` | `{"role":"observability","evaluation":true,"soc2_type_ii":true,"managed_cloud":true,"model_serving":true,"pricing_model":"commercial_enterprise_platform","self_hostable":true,"multi_provider":true,"vpc_deployment":true,"otel_compatible":true,"no_train_on_data":"unknown","llm_observability":true,"prompt_management":true,"framework_agnostic":true,"experiment_tracking":true,"mit_or_apache_permissive_oss_license":true,"native_observability_and_trace_logging":true,"fault_tolerance_and_llm_retry_mechanisms":true,"tool_calling_and_function_schema_validation":true,"managed_cloud_runtime_infrastructure_offered":true,"synchronous_and_asynchronous_execution_modes":true,"streaming_output_and_intermediate_step_yielding":true,"dynamic_agent_generation_and_spawning_at_runtime":true}` |
| integrations.count | 9 | 7 |
| integrations.list | `[{"name":"OpenAI"},{"name":"Anthropic"},{"name":"Mistral"},{"name":"Hugging Face"},{"name":"Weaviate"},{"name":"Pinecone"},{"name":"Elasticsearch"},{"name":"AstraDB"},{"name":"Apify"},{"name":"ReadMe"},{"name":"Azure OpenAI"},{"name":"Datadog"},{"name":"OpenTelemetry"},{"name":"SerperDev"},{"name":"SearchApi"},{"name":"Cohere"},{"name":"AWS Bedrock"},{"name":"FAISS"},{"name":"AWS SageMaker"},{"name":"OpenSearch"},{"name":"Google Colab"},{"name":"MCP servers"},{"name":"Amazon Bedrock","native":true,"category":"llm","direction":"outbound"},{"name":"Claude","native":true,"category":"llm","direction":"outbound"},{"name":"Amazon S3","native":true,"category":"data","direction":"inbound"},{"name":"Meta","native":true,"category":"llm","direction":"outbound"},{"name":"Stability AI","native":true,"category":"llm","direction":"outbound"},{"name":"AI21 Labs","native":true,"category":"llm","direction":"outbound"}]` | `[{"name":"Pydantic AI"},{"name":"Pydantic Evals"},{"name":"OpenTelemetry"},{"name":"Model Context Protocol (MCP)"},{"name":"Snowflake"},{"name":"FastAPI"},{"name":"OpenAI"},{"name":"LangChain"},{"name":"HuggingFace"},{"name":"Prefect"}]` |
| language.primary | Python | Python |
| license.spdx | Apache-2.0 | MIT |
| market.availability | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` | `{"primaryMarkets":[],"availabilityScope":"global","availableCountries":[],"notAvailableCountries":[]}` |
| platform.support | `{"cli":true,"web":true}` | `{"web":true}` |
| pricing | `{"type":"hybrid","plans":[{"free":true,"name":"Open Source","description":"Free, open-source AI framework with community support","contactSales":false},{"free":false,"name":"Enterprise","description":"Enterprise support with exclusive access to data workflows, testing tools, and scalable cloud or on-premise deployment","contactSales":true}],"summary":"Free open-source core with paid enterprise support available","freeTier":true,"sourceUrl":"https://haystack.deepset.ai","retrievedAt":"2026-10-13T22:38:13.832Z"}` | `{"type":"subscription","plans":[{"free":true,"name":"Personal","summary":"Free for up to 10M spans/month","features":["10M spans per month","Hard cap to prevent bill shock"],"minSeats":1,"commitment":"monthly","components":[{"kind":"fixed","amount":0,"period":"month","currency":"USD"}],"description":"For solo developers","contactSales":false,"includedLimits":{"spans":"10M/month"}},{"free":false,"name":"Team","summary":"$49/month + $2 per million spans","features":["Overage billing at flat rate","Seat limits apply"],"commitment":"monthly","components":[{"kind":"fixed","amount":49,"period":"month","currency":"USD"},{"per":{"qty":1,"unit":"million spans"},"kind":"metered","amount":2,"currency":"USD"}],"contactSales":false},{"free":false,"name":"Growth","summary":"$249/month + $2 per million spans, unlimited seats","features":["No seat limits","Overage billing at flat rate"],"commitment":"monthly","components":[{"kind":"fixed","amount":249,"period":"month","currency":"USD"},{"per":{"qty":1,"unit":"million spans"},"kind":"metered","amount":2,"currency":"USD"}],"contactSales":false}],"summary":"Free tier for 10M spans/month. Paid plans from $49/month with flat-rate overage pricing at $2 per million spans.","currency":"USD","freeTier":true,"sourceUrl":"https://pydantic.dev/articles/ai-observability-pricing-comparison","retrievedAt":"2026-09-13T19:28:55.779Z","startingPrice":{"amount":49,"period":"month","currency":"USD"},"billingPeriods":["month"]}` |
| pricing.free_tier | yes | yes |
| pricing.model | freemium | freemium |
| pricing.price_level | low | mid |
| pricing.starting_price | - | `{"amount":49,"currency":"USD"}` |
| pricing.transparent | no | yes |
| release.cadence_days | 2 | 1 |
| release.history | `[{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.3.0","date":"2026-10-01T10:39:53Z","type":"stable","version":"v3.3.0"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.3.0-rc1","date":"2026-09-30T13:33:59Z","type":"prerelease","version":"v3.3.0-rc1"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.2.0","date":"2026-09-24T10:49:36Z","type":"stable","version":"v3.2.0"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.2.0-rc1","date":"2026-09-23T12:24:18Z","type":"prerelease","version":"v3.2.0-rc1"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.1.1","date":"2026-09-03T09:27:52Z","type":"stable","version":"v3.1.1"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.1.1-rc1","date":"2026-09-03T07:27:21Z","type":"prerelease","version":"v3.1.1-rc1"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.1.0","date":"2026-08-24T15:19:09Z","type":"stable","version":"v3.1.0"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.1.0-rc3","date":"2026-08-21T15:31:26Z","type":"prerelease","version":"v3.1.0-rc3"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.1.0-rc2","date":"2026-08-21T14:30:15Z","type":"prerelease","version":"v3.1.0-rc2"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.1.0-rc1","date":"2026-08-18T09:09:17Z","type":"prerelease","version":"v3.1.0-rc1"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.0.0","date":"2026-07-20T12:07:08Z","type":"stable","version":"v3.0.0"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v3.0.0-rc1","date":"2026-07-20T09:04:49Z","type":"prerelease","version":"v3.0.0-rc1"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v2.31.0","date":"2026-07-08T11:34:43Z","type":"stable","version":"v2.31.0"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v2.31.0-rc2","date":"2026-07-07T08:18:58Z","type":"prerelease","version":"v2.31.0-rc2"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v2.31.0-rc1","date":"2026-07-07T06:24:07Z","type":"prerelease","version":"v2.31.0-rc1"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v2.30.2","date":"2026-06-18T08:36:45Z","type":"stable","version":"v2.30.2"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v2.30.2-rc1","date":"2026-06-17T14:32:06Z","type":"prerelease","version":"v2.30.2-rc1"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v2.30.1","date":"2026-06-09T13:26:29Z","type":"stable","version":"v2.30.1"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v2.30.1-rc1","date":"2026-06-09T12:45:47Z","type":"prerelease","version":"v2.30.1-rc1"},{"url":"https://github.com/deepset-ai/haystack/releases/tag/v2.30.0","date":"2026-06-03T10:21:07Z","type":"stable","version":"v2.30.0"}]` | `[{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/clai2-bleeding","date":"2026-10-06T01:25:23Z","type":"prerelease","version":"clai2-bleeding"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.56.0","date":"2026-10-13T23:35:15Z","type":"stable","version":"v2.56.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.55.0","date":"2026-10-09T19:20:25Z","type":"stable","version":"v2.55.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.54.0","date":"2026-10-03T03:21:28Z","type":"stable","version":"v2.54.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.53.0","date":"2026-10-02T02:52:26Z","type":"stable","version":"v2.53.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.52.0","date":"2026-09-30T00:54:20Z","type":"stable","version":"v2.52.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.7","date":"2026-09-30T00:54:21Z","type":"stable","version":"v1.107.7"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.51.0","date":"2026-09-25T23:19:04Z","type":"stable","version":"v2.51.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.50.0","date":"2026-09-25T04:47:15Z","type":"stable","version":"v2.50.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.49.0","date":"2026-09-24T03:09:53Z","type":"stable","version":"v2.49.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.48.0","date":"2026-09-23T02:41:40Z","type":"stable","version":"v2.48.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.47.0","date":"2026-09-22T03:59:32Z","type":"stable","version":"v2.47.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.46.0","date":"2026-09-19T03:51:40Z","type":"stable","version":"v2.46.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.45.0","date":"2026-09-18T04:31:12Z","type":"stable","version":"v2.45.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.44.0","date":"2026-09-17T04:03:52Z","type":"stable","version":"v2.44.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v1.107.6","date":"2026-09-17T03:30:51Z","type":"stable","version":"v1.107.6"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.43.0","date":"2026-09-12T00:54:42Z","type":"stable","version":"v2.43.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.42.0","date":"2026-09-09T03:33:32Z","type":"stable","version":"v2.42.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.41.0","date":"2026-09-08T04:15:21Z","type":"stable","version":"v2.41.0"},{"url":"https://github.com/pydantic/pydantic-ai/releases/tag/v2.40.0","date":"2026-09-05T00:09:37Z","type":"stable","version":"v2.40.0"}]` |
| security.certifications | - | `[{"name":"SOC 2 Type II","level":"Type II","status":"active"}]` |
| security.disclosure_policy | - | yes |
| security.gdpr | - | yes |
| security.hipaa | - | yes |
| security.scorecard | 9.4 | - |
| security.soc2 | - | yes |
| security.trust_center | - | https://pydantic.dev/security |
| security.vulnerabilities | `{"count":1,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=farm-haystack&per_page=100","last_12m":0,"max_severity":"CRITICAL"}` | `{"count":0,"source":"https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=go&package_name=github.com%2Fpydantic%2Fpydantic-ai&per_page=100","last_12m":0,"max_severity":null}` |

## Capabilities (MLOps & LLMOps Tools)

| Capability | Haystack | Pydantic AI |
|---|:--:|:--:|
| **Core** |  |  |
| Tool role | End-to-end ML platform | LLM observability / eval |
| **Deployment** |  |  |
| Self-hostable / OSS core | ✓ | ✓ |
| Managed cloud available | ✓ | ✓ |
| On-prem / VPC deployment | ✓ | ✓ |
| **Observability** |  |  |
| LLM tracing / observability | ✓ | ✓ |
| Evaluation (offline / LLM-judge / human) | ✓ | ✓ |
| **Dev** |  |  |
| Prompt management + versioning | ✓ | ✓ |
| **Tracking** |  |  |
| Experiment tracking / model registry | - | ✓ |
| **Serving** |  |  |
| Model serving / inference endpoint | ✓ | ✓ |
| **Interop** |  |  |
| OpenTelemetry / OpenLLMetry compatible | ✓ | ✓ |
| Framework-agnostic | ✓ | ✓ |
| **Gateway** |  |  |
| Multi-provider model support | ✓ | ✓ |
| **Data** |  |  |
| No-train-on-customer-data guarantee | Unknown | Unknown |

*Source: vioscaleAI. Generated 2026-10-16T20:10:22.081Z. "-" = undocumented, not absent.*