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Head-to-head · Tool Calling

Langflow vs Kong AI Gateway

  • Updated Oct 2026
  • Both researched from official sources
  • 1 check side by side
Higher score Langflow #3 in Tool Calling 8.3/10 Free plan Free plan✓ 0 of 3 features Visit Langflow
Kong AI Gateway #5 in Tool Calling 8.1/10 30-day trial Free trial✓ 0 of 3 features Visit Kong

Langflow leads on 1 check, Kong AI Gateway on 0, and 0 are even. Who comes out ahead on the 1 yes/no, price and count check where we have data for both products. The editor score weighs everything else too.

Our verdict

  • Highest scoreLangflow · 8.3/10
  • Free planonly Langflow
  • Free trialonly Kong AI Gateway

Langflow scores higher on our rubric for tool calling: 8.3 against 8.1 out of 10; our editors rank them #3 and #5.

Langflow offers free plan; Kong AI Gateway doesn't.

Langflow is the better fit for open-source teams building visual tool-using agents. Kong AI Gateway is the better fit for enterprises governing AI, MCP, and A2A traffic.

  • Langflow fits best

    Open-source teams building visual tool-using agents

  • Kong AI Gateway fits best

    Enterprises governing AI, MCP, and A2A traffic

Advertiser disclosure: iTechGuides is reader-supported. Vendors can pay for top positions in our rankings and for a place on other products' pages, and we may earn a commission when you click some links. Bought places stand at the number bought; this page and our disclosure say so. Paying vendors may get a fuller, more detailed review from our editors, and that review can change their score. How we rank.

Side by side

Feature Langflow 8.3/10 Visit ↗ Kong AI Gateway 8.1/10 Visit ↗
At a glance
Editor score 8.3 8.1
Ranking #3 in Tool Calling #5 in Tool Calling
Best for Open-source teams building visual tool-using agents Enterprises governing AI, MCP, and A2A traffic
Pricing model Free Paid
Starting price Free plan —
Free plan ✓ (best) —
Free trial — 30 days
Deployment Cloud, Self-hosted, Desktop Cloud, Self-hosted
Platforms Web, Windows, macOS, Linux Web
Support Community, Docs Email, Tickets
Integrations 12 integrations 14 integrations
Built for Solo, Small business, Mid-market, Enterprise Small business, Mid-market, Enterprise
Features Langflow 0/3 · Kong AI Gateway 0/3
Parallel tool calls Not checked yet Not checked yet
Structured outputs Not checked yet Not checked yet
Call observability Not checked yet Not checked yet
Specs
Protocol support Not checked yet Not checked yet
Deployment Not checked yet Not checked yet
Tool-choice control Not checked yet Not checked yet
Authentication methods Not checked yet Not checked yet
Our review
Pros
  • Agent component supports tool calling, custom instructions, and memory
  • Visual flows connect models, tools, components, and outputs
  • Supports human approval, multi-agent workflows, and self-hosted deployment
  • Routes and load-balances requests across multiple LLM providers.
  • Supports LLM, MCP, and A2A traffic with access and governance controls.
  • Tracks token use, cost, latency, and errors with spend controls.
Cons
  • Tool calling sits within a broader flow-building product
  • Voice mode is not available in Langflow Desktop
  • Provider integrations are delivered through installable extensions
  • There is no perpetual free plan; the $0 offer lasts 30 days.
  • Fully self-hosted API gateways are listed as an Enterprise feature.
  • Support channels are email and ticket.
Our verdict

Langflow is an open-source, visual, Python-powered platform for building, testing, and deploying AI agents and LLM applications. Its Agent component supports multiple model providers, tool calling, custom instructions, memory, and…

Read the review →

Kong AI Gateway gives platform and infrastructure teams a gateway for managing traffic among applications, agents, MCP servers, and large language model providers. Its tool-calling relevance comes from support for MCP and A2A traffic…

Read the review →
  1. LangflowTool Calling 8.3Free plan
  2. Kong AI GatewayTool Calling 8.130-day trial

Strengths and trade-offs

  • Langflow — where it wins

    • Agent component supports tool calling, custom instructions, and memory
    • Visual flows connect models, tools, components, and outputs
    • Supports human approval, multi-agent workflows, and self-hosted deployment

    Where it doesn't

    • Tool calling sits within a broader flow-building product
    • Voice mode is not available in Langflow Desktop
    • Provider integrations are delivered through installable extensions

  • Kong AI Gateway — where it wins

    • Routes and load-balances requests across multiple LLM providers.
    • Supports LLM, MCP, and A2A traffic with access and governance controls.
    • Tracks token use, cost, latency, and errors with spend controls.

    Where it doesn't

    • There is no perpetual free plan; the $0 offer lasts 30 days.
    • Fully self-hosted API gateways are listed as an Enterprise feature.
    • Support channels are email and ticket.
  • Langflow8.3/10 · Free plan

    A visual, open-source flow builder for tool-using agents, RAG, and deployment.

    Visit LangflowFull verdict →
  • Kong AI Gateway8.1/10 · 30-day trial

    A gateway for governing AI and tool traffic across models, with routing and spend controls.

    Visit KongFull verdict →

More comparisons

All tool calling comparisons → · Full ranking →

Reviewed by iTechGuides Editors · Editorial team · Updated Oct 2026

Last updated · How we research and update