Comparison

Google Agent Development Kit vs Haystack

On the evidence we track, Haystack leads this comparison with a composite score of 66/100. Scores are only directly comparable because these tools share a category; the full breakdown and every source is below.

Google Agent Development Kit full profile →Haystack full profile →

Machine formatsMarkdownJSONGraphQLMarkdown is open. JSON and GraphQL need a free key.

Google Agent Development Kit58

★Haystack66

Attribute comparison across 2 tools
Attribute	Google Agent Development Kit	HaystackLeader
vioscaleAI score	58 / 100low · 44%	66 / 100medium · 68%
Pricing
Free tierpricing.free_tier	✓	✓
Modelpricing.model	open_source	freemium
Price levelpricing.price_level	free	low
Transparentpricing.transparent	✓	✗
Integrations
Countintegrations.count	22	9
Security
Scorecardsecurity.scorecard	-	9.4
Vulnerabilitiessecurity.vulnerabilities	Count: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=com.google.adk%3Agoogle-adk-kotlin-core-jvm&per_page=100 · Last 12m: 0	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
Adoption
Dependent reposadoption.dependent_repos	0	237
Github starsadoption.github_stars	265	26,738
Package downloads weeklyadoption.package_downloads_weekly	-	121,930
Activity
Commits last 30dactivity.commits_last_30d	100	100
Release
Cadence daysrelease.cadence_days	12	2
Historyrelease.history	15 items	20 items
License
Spdxlicense.spdx	Apache-2.0	Apache-2.0
Language
Primarylanguage.primary	Kotlin	Python
Market
Availabilitymarket.availability	Available worldwide · HQ US	Available worldwide
Content
Faqcontent.faq	7 items	6 items

Score

vioscaleAI score

Google Agent Development Kit58 / 100low · 44%

Haystack66 / 100medium · 68%

Pricing

Free tier

Google Agent Development Kit✓

Haystack✓

Model

Google Agent Development Kitopen_source

Haystackfreemium

Price level

Google Agent Development Kitfree

Haystacklow

Transparent

Google Agent Development Kit✓

Haystack✗

Integrations

Count

Google Agent Development Kit22

Haystack9

Security

Scorecard

Google Agent Development Kit–

Haystack9.4

Vulnerabilities

Google Agent Development KitCount: 0 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=maven&package_name=com.google.adk%3Agoogle-adk-kotlin-core-jvm&per_page=100 · Last 12m: 0

HaystackCount: 1 · Source: https://advisories.ecosyste.ms/api/v1/advisories?ecosystem=pypi&package_name=farm-haystack&per_page=100 · Last 12m: 0 · Max severity: CRITICAL

Adoption

Dependent repos

Google Agent Development Kit0

Haystack237

Github stars

Google Agent Development Kit265

Haystack26,738

Package downloads weekly

Google Agent Development Kit–

Haystack121,930

Activity

Commits last 30d

Google Agent Development Kit100

Haystack100

Release

Cadence days

Google Agent Development Kit12

Haystack2

History

Google Agent Development Kit15 items

Haystack20 items

License

Spdx

Google Agent Development KitApache-2.0

HaystackApache-2.0

Language

Primary

Google Agent Development KitKotlin

HaystackPython

Market

Availability

Google Agent Development KitAvailable worldwide · HQ US

HaystackAvailable worldwide

Content

Faq

Google Agent Development Kit7 items

Haystack6 items

Capabilities

Feature-by-feature on the axes that matter for multi agent orchestration. “-” means undocumented, not absent.

Capability comparison for Multi Agent Orchestration
Capability	Google Agent Development Kit	Haystack
Capabilities
Architecture paradigm	Graph based cycles	Graph based cycles
Native memory and state persistence layer	✓	✓
Dynamic agent generation and spawning at runtime	✓	✓
Synchronous and asynchronous execution modes	✓	-
Tool calling and function schema validation	✓	✓
Streaming output and intermediate step yielding	✓	-
Fault tolerance and LLM retry mechanisms	✓	-
Managed cloud runtime infrastructure offered	✓	✓
Native observability and trace logging	✓	✓
SOC2 type ii	✗	-
Mit or apache permissive oss license	✓	✓
Pricing model	Free open source	Free open source

Capabilities

Architecture paradigm

Google Agent Development KitGraph based cycles

HaystackGraph based cycles

Native memory and state persistence layer

Google Agent Development Kit✓

Haystack✓

Dynamic agent generation and spawning at runtime

Google Agent Development Kit✓

Haystack✓

Synchronous and asynchronous execution modes

Google Agent Development Kit✓

Haystack-

Tool calling and function schema validation

Google Agent Development Kit✓

Haystack✓

Streaming output and intermediate step yielding

Google Agent Development Kit✓

Haystack-

Fault tolerance and LLM retry mechanisms

Google Agent Development Kit✓

Haystack-

Managed cloud runtime infrastructure offered

Google Agent Development Kit✓

Haystack✓

Native observability and trace logging

Google Agent Development Kit✓

Haystack✓

SOC2 type ii

Google Agent Development Kit✗

Haystack-

Mit or apache permissive oss license

Google Agent Development Kit✓

Haystack✓

Pricing model

Google Agent Development KitFree open source

HaystackFree open source

What each one is

The product in its own terms, so the numbers below have context.

Google Agent Development Kit

A multi-language agent development framework that enables developers to create production-grade AI agents with built-in tools for orchestration, memory management, code execution, and deployment to cloud or self-hosted infrastructure.

Independently observed

Haystack

Leader

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.

Independently observed

Pricing

List pricing as published by each vendor, with the date we read it. Always verify at the source before you buy.

Google Agent Development Kit

Open sourceFree tier

Free and open-source under Apache 2.0 license

as of 2026-08-21verify ↗

Haystack

Leader

HybridFree tier

Free open-source core with paid enterprise support available

Open SourceFree
EnterpriseContact sales

as of 2026-10-13verify ↗

Platform & deployment

Where each product runs and how it can be hosted. A dash means undocumented, not unsupported.

Platform and deployment support comparison
Supports	Google Agent Development Kit	Haystack
WebPlatforms	✓	✓
CLIPlatforms	✓	✓
Cloud / SaaSDeployment	✓	✓
Self-hostedDeployment	✓	✓
On-premiseDeployment	✗	✓

Platforms

Web

Google Agent Development Kit✓

Haystack✓

CLI

Google Agent Development Kit✓

Haystack✓

Deployment

Cloud / SaaS

Google Agent Development Kit✓

Haystack✓

Self-hosted

Google Agent Development Kit✓

Haystack✓

On-premise

Google Agent Development Kit✗

Haystack✓

Integrations

What each product connects to. Counts come from the vendor's own integration directory where one exists.

In common (6)

Anthropic
Meta
OpenTelemetry
Hugging Face
HuggingFace
Datadog

Google Agent Development Kit

52 total - 46 not shared

Google Search
Google Maps
Vertex AI Search
Google Ads
LinkedIn
TikTok
Aerospike
Firebase
Firestore
GitHub
Google Workspace
Google Calendar
Salesforce
Slack
Figma
Linear
Notion
MongoDB
Milvus
Grafana Cloud
Langfuse
LangSmith
Freeplay
Postman
+22 more

Independently observed

Haystack

Leader

28 total - 23 not shared

OpenAI
Mistral
Weaviate
Pinecone
Elasticsearch
AstraDB
Apify
ReadMe
Azure OpenAI
SerperDev
SearchApi
Cohere
AWS Bedrock
FAISS
AWS SageMaker
OpenSearch
Google Colab
MCP servers
Amazon Bedrock
Claude
Amazon S3
Stability AI
AI21 Labs

Independently observed

Still deciding?

Google Agent Development Kit or Haystack: which one depends on you

A composite score cannot know your constraints. Describe them and both get re-weighted against what you actually need, with the evidence behind every position.

Free to run, no account needed to start. How the evaluation works

Comparison generated from independently-sourced facts. Every value links to its source and retrieval date. See the method.