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Alternatives to Langflow

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Best Open Source Alternatives

Reviewed tools whose core is open source.

ToolWhy switch?PriceJAVIS ScoreKey capabilitiesEvidenceCompare

LangGraph

AI Agent Frameworks AI Agent Frameworks · $39/seat/mo

LangGraph didn't win the "which agent framework" argument by being the friendliest. It won by being the one that doesn't fall over.

$39/seat/movs. $0
88
Build AI agents
Sources checkedUpdated Oct 21, 2026

OpenAI Agents SDK

AI Agent Frameworks AI Agent Frameworks · Free

The SDK didn't get replaced by the Agents API. It got a sibling.

Freevs. $0
86
Build AI agents
Sources checkedUpdated Oct 5, 2026

Microsoft Agent Framework

AI Agent Frameworks AI Agent Frameworks · Free

This isn't Microsoft's first agent framework. It's Microsoft admitting the first two weren't going to converge on their own.

Freevs. $0
85
Build AI agents
Sources checkedUpdated Oct 5, 2026

CrewAI

AI Agent Frameworks AI Agent Frameworks · Custom

CrewAI didn't get worse. It got a name change, a smaller price sheet, and a genuine security scare it actually fixed properly.

Customvs. $0
82
Build AI agents
Sources checkedUpdated Oct 5, 2026

Google Agent Development Kit (ADK)

AI Agent Frameworks AI Agent Frameworks · Free

ADK is genuinely serious engineering. "Free" is true of the framework, not of what running it actually costs.

Freevs. $0
78
Build AI agents
Sources checkedUpdated Oct 5, 2026

Pydantic AI

AI Agent Frameworks AI Agent Frameworks · Free (framework); Logfire Personal $0, Team $49/month, Growth $249/month

Free MIT Python agent framework with typed outputs, eight durable-execution engines and built-in evals, now on a v2 line that ships a release every two days; the optional Logfire add-on is free to $249 a month, and GitHub lists 19 patched advisories in 2026.

Free (framework); Logfire Personal $0, Team $49/month, Growth $249/monthvs. $0
77
—
Sources checkedUpdated Oct 28, 2026

Alternatives With a Free Plan

Each one has a free tier or a free open-source core, per its review.

ToolWhy switch?PriceJAVIS ScoreKey capabilitiesEvidenceCompare

LangGraph

AI Agent Frameworks AI Agent Frameworks · $39/seat/mo

LangGraph didn't win the "which agent framework" argument by being the friendliest. It won by being the one that doesn't fall over.

$39/seat/movs. $0
88
Build AI agents
Sources checkedUpdated Oct 21, 2026

OpenAI Agents SDK

AI Agent Frameworks AI Agent Frameworks · Free

The SDK didn't get replaced by the Agents API. It got a sibling.

Freevs. $0
86
Build AI agents
Sources checkedUpdated Oct 5, 2026

Microsoft Agent Framework

AI Agent Frameworks AI Agent Frameworks · Free

This isn't Microsoft's first agent framework. It's Microsoft admitting the first two weren't going to converge on their own.

Freevs. $0
85
Build AI agents
Sources checkedUpdated Oct 5, 2026

CrewAI

AI Agent Frameworks AI Agent Frameworks · Custom

CrewAI didn't get worse. It got a name change, a smaller price sheet, and a genuine security scare it actually fixed properly.

Customvs. $0
82
Build AI agents
Sources checkedUpdated Oct 5, 2026

Google Agent Development Kit (ADK)

AI Agent Frameworks AI Agent Frameworks · Free

ADK is genuinely serious engineering. "Free" is true of the framework, not of what running it actually costs.

Freevs. $0
78
Build AI agents
Sources checkedUpdated Oct 5, 2026

Pydantic AI

AI Agent Frameworks AI Agent Frameworks · Free (framework); Logfire Personal $0, Team $49/month, Growth $249/month

Free MIT Python agent framework with typed outputs, eight durable-execution engines and built-in evals, now on a v2 line that ships a release every two days; the optional Logfire add-on is free to $249 a month, and GitHub lists 19 patched advisories in 2026.

Free (framework); Logfire Personal $0, Team $49/month, Growth $249/monthvs. $0
77
—
Sources checkedUpdated Oct 28, 2026

Dify

AI Agent Frameworks AI Agent Frameworks · $59/month

A capable open-source AI app builder, free to self-host or $59 and $159 a month per workspace in the cloud, whose included credits buy only a few dollars of model use, under a modified Apache license and with 21 published security advisories.

$59/monthvs. $0
70
—
Sources checkedUpdated Oct 21, 2026

LangChain (with LangSmith)

AI Agent Frameworks AI Agent Frameworks · $39/seat/month

A free MIT-licensed agent framework with huge adoption, paired with LangSmith at $0 or $39 a seat whose trace overage rose from $0.50 to $5 per 1,000 in under a year; strong compliance, persistent developer criticism.

$39/seat/monthvs. $0
69
—
Sources checkedUpdated Oct 16, 2026

Higher JAVIS Score

Alternatives our reviews score above 64/100.

ToolWhy switch?PriceJAVIS ScoreKey capabilitiesEvidenceCompare

LangGraph

AI Agent Frameworks AI Agent Frameworks · $39/seat/mo

JAVIS Score 88 vs 64. LangGraph didn't win the "which agent framework" argument by being the friendliest. It won by being the one that doesn't fall over.

$39/seat/movs. $0
88
Build AI agents
Sources checkedUpdated Oct 21, 2026

OpenAI Agents SDK

AI Agent Frameworks AI Agent Frameworks · Free

JAVIS Score 86 vs 64. The SDK didn't get replaced by the Agents API. It got a sibling.

Freevs. $0
86
Build AI agents
Sources checkedUpdated Oct 5, 2026

Microsoft Agent Framework

AI Agent Frameworks AI Agent Frameworks · Free

JAVIS Score 85 vs 64. This isn't Microsoft's first agent framework. It's Microsoft admitting the first two weren't going to converge on their own.

Freevs. $0
85
Build AI agents
Sources checkedUpdated Oct 5, 2026

CrewAI

AI Agent Frameworks AI Agent Frameworks · Custom

JAVIS Score 82 vs 64. CrewAI didn't get worse. It got a name change, a smaller price sheet, and a genuine security scare it actually fixed properly.

Customvs. $0
82
Build AI agents
Sources checkedUpdated Oct 5, 2026

Google Agent Development Kit (ADK)

AI Agent Frameworks AI Agent Frameworks · Free

JAVIS Score 78 vs 64. ADK is genuinely serious engineering. "Free" is true of the framework, not of what running it actually costs.

Freevs. $0
78
Build AI agents
Sources checkedUpdated Oct 5, 2026

OpenAI Agents API

AI Agent Frameworks AI Agent Frameworks · $0.20/$1.20 per 1M tokens

JAVIS Score 78 vs 64. This is OpenAI finally selling you the thing it already trusted itself to run.

$0.20/$1.20 per 1M tokensvs. $0
78
Build AI agents
Sources checkedUpdated Oct 5, 2026

Pydantic AI

AI Agent Frameworks AI Agent Frameworks · Free (framework); Logfire Personal $0, Team $49/month, Growth $249/month

JAVIS Score 77 vs 64. Free MIT Python agent framework with typed outputs, eight durable-execution engines and built-in evals, now on a v2 line that ships a release every two days; the optional Logfire add-on is free to $249 a month, and GitHub lists 19 patched advisories in 2026.

Free (framework); Logfire Personal $0, Team $49/month, Growth $249/monthvs. $0
77
—
Sources checkedUpdated Oct 28, 2026

Relevance AI

AI Agent Frameworks AI Agent Frameworks · $19/mo (Pro, billed annually)

JAVIS Score 72 vs 64. A serious agent platform for go-to-market teams, with a pricing model you have to model before you build: no free plan, a sales-only public pricing page, and every tool run billed as an Action, even when it fails.

$19/mo (Pro, billed annually)vs. $0
72
—
Sources checkedUpdated Oct 5, 2026

Dify

AI Agent Frameworks AI Agent Frameworks · $59/month

JAVIS Score 70 vs 64. A capable open-source AI app builder, free to self-host or $59 and $159 a month per workspace in the cloud, whose included credits buy only a few dollars of model use, under a modified Apache license and with 21 published security advisories.

$59/monthvs. $0
70
—
Sources checkedUpdated Oct 21, 2026

LangChain (with LangSmith)

AI Agent Frameworks AI Agent Frameworks · $39/seat/month

JAVIS Score 69 vs 64. A free MIT-licensed agent framework with huge adoption, paired with LangSmith at $0 or $39 a seat whose trace overage rose from $0.50 to $5 per 1,000 in under a year; strong compliance, persistent developer criticism.

$39/seat/monthvs. $0
69
—
Sources checkedUpdated Oct 16, 2026

Same Category

Other reviewed tools in AI Agent Frameworks.

ToolWhy switch?PriceJAVIS ScoreKey capabilitiesEvidenceCompare

LangGraph

AI Agent Frameworks AI Agent Frameworks · $39/seat/mo

LangGraph didn't win the "which agent framework" argument by being the friendliest. It won by being the one that doesn't fall over.

$39/seat/movs. $0
88
Build AI agents
Sources checkedUpdated Oct 21, 2026

OpenAI Agents SDK

AI Agent Frameworks AI Agent Frameworks · Free

The SDK didn't get replaced by the Agents API. It got a sibling.

Freevs. $0
86
Build AI agents
Sources checkedUpdated Oct 5, 2026

Microsoft Agent Framework

AI Agent Frameworks AI Agent Frameworks · Free

This isn't Microsoft's first agent framework. It's Microsoft admitting the first two weren't going to converge on their own.

Freevs. $0
85
Build AI agents
Sources checkedUpdated Oct 5, 2026

CrewAI

AI Agent Frameworks AI Agent Frameworks · Custom

CrewAI didn't get worse. It got a name change, a smaller price sheet, and a genuine security scare it actually fixed properly.

Customvs. $0
82
Build AI agents
Sources checkedUpdated Oct 5, 2026

Google Agent Development Kit (ADK)

AI Agent Frameworks AI Agent Frameworks · Free

ADK is genuinely serious engineering. "Free" is true of the framework, not of what running it actually costs.

Freevs. $0
78
Build AI agents
Sources checkedUpdated Oct 5, 2026

OpenAI Agents API

AI Agent Frameworks AI Agent Frameworks · $0.20/$1.20 per 1M tokens

This is OpenAI finally selling you the thing it already trusted itself to run.

$0.20/$1.20 per 1M tokensvs. $0
78
Build AI agents
Sources checkedUpdated Oct 5, 2026

Pydantic AI

AI Agent Frameworks AI Agent Frameworks · Free (framework); Logfire Personal $0, Team $49/month, Growth $249/month

Free MIT Python agent framework with typed outputs, eight durable-execution engines and built-in evals, now on a v2 line that ships a release every two days; the optional Logfire add-on is free to $249 a month, and GitHub lists 19 patched advisories in 2026.

Free (framework); Logfire Personal $0, Team $49/month, Growth $249/monthvs. $0
77
—
Sources checkedUpdated Oct 28, 2026

Relevance AI

AI Agent Frameworks AI Agent Frameworks · $19/mo (Pro, billed annually)

A serious agent platform for go-to-market teams, with a pricing model you have to model before you build: no free plan, a sales-only public pricing page, and every tool run billed as an Action, even when it fails.

$19/mo (Pro, billed annually)vs. $0
72
—
Sources checkedUpdated Oct 5, 2026

Dify

AI Agent Frameworks AI Agent Frameworks · $59/month

A capable open-source AI app builder, free to self-host or $59 and $159 a month per workspace in the cloud, whose included credits buy only a few dollars of model use, under a modified Apache license and with 21 published security advisories.

$59/monthvs. $0
70
—
Sources checkedUpdated Oct 21, 2026

LangChain (with LangSmith)

AI Agent Frameworks AI Agent Frameworks · $39/seat/month

A free MIT-licensed agent framework with huge adoption, paired with LangSmith at $0 or $39 a seat whose trace overage rose from $0.50 to $5 per 1,000 in under a year; strong compliance, persistent developer criticism.

$39/seat/monthvs. $0
69
—
Sources checkedUpdated Oct 16, 2026