SOFTWARE COMPARISON

Langflow vs Relay.app: Which Is Better in 2026?

Compare pricing, free plans, strengths and weaknesses to decide which tool fits your workflow better.

Langflow logo

Langflow

Open-source visual framework for building agentic AI applications

View Langflow →
VS
Relay.app logo

Relay.app

Human-in-the-loop workflow automation with AI steps and collaborative approvals

View Relay.app →
Comparison scope

Compare the requirements of your workflow

This page places recorded product information side by side. It does not establish a winner or show results from a matched product test. Check the features, limits and current provider terms for the work you need to complete.

Quick comparison

Feature
Langflow
Relay.app
Pricing
Open source / self-hosted
Freemium subscription
Starting price
$0 software
Free plan; paid Professional plans
Free plan
Yes
Yes
Best for
Developers building visual agent and RAG workflows who want open-source control
Teams that need reliable AI automation with human review and approvals built into workflows
Pricing
LangflowOpen source / self-hosted
Relay.appFreemium subscription
Starting price
Langflow$0 software
Relay.appFree plan; paid Professional plans
Free plan
LangflowYes
Relay.appYes
Best for
LangflowDevelopers building visual agent and RAG workflows who want open-source control
Relay.appTeams that need reliable AI automation with human review and approvals built into workflows

Langflow pros

  • Open-source core
  • Visual component-based workflow
  • Strong developer extensibility

Langflow cons

  • Infrastructure and model costs are separate
  • Production deployment requires technical ownership

Relay.app pros

  • Excellent human-in-the-loop workflow design
  • AI steps and app integrations
  • Free plan for smaller automations

Relay.app cons

  • Smaller integration ecosystem than the largest automation platforms
  • High-volume workflows require paid capacity

Choose Langflow if...

Developers building visual agent and RAG workflows who want open-source control

Explore Langflow →

Choose Relay.app if...

Teams that need reliable AI automation with human review and approvals built into workflows

Explore Relay.app →