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Langflow Review

Depends

Should I use Langflow?

Welcome to Langflow - Build AI applications with ease - langflow.org

· 1 month ago

Buy if you're a developer prototyping AI agents and RAG flows on a locked-down, self-hosted instance. Skip it for internet-facing or multi-user production — the exploited-RCE track record and missing tenant isolation make that reckless.

Confidence

Medium. Based on ~20 public sources across reviews, security advisories, pricing pages, and news coverage.

Ratings

  • Value for money
  • Ease of use
  • Feature depth
  • Support qualityInsufficient evidence in sources
  • Security posture

Pricing

$0

Open source (self-hosted)

ModelNot disclosed
Monthly feesNot disclosed
HardwareNot disclosed
Free tierYes
Managed hosting (via Elestio)from $18/mo

Best for

  • Developers prototyping AI agents fast
  • RAG chatbot builders
  • Python-comfortable teams
  • Self-hosters who can harden security

Not for

  • Internet-facing production systems
  • Anyone handling sensitive data
  • Non-technical teams expecting stable no-code
  • Multi-tenant or shared deployments

Gotchas - check before you buy

high

No tenant isolation per official docs — never share instances beyond trusted users

high

Critical RCEs exploited in the wild; patch immediately or keep off public internet

medium

Pin your version: upgrades have broken users' existing flows

low

Only self-hosting is free; managed hosting costs ~$18/mo via third parties like Elestio

Pros and cons

Pros

  • Excellent for rapid iteration on AI flows
  • Wide component range gives flexibility for agents and RAG
  • Free, open source, Python-based platform
  • Users cite a cleaner UI than rivals like Flowise
  • Visual low-code building for multi-agent apps

Cons

  • Version upgrades have broken users' saved flows
  • Production readiness actively questioned by users
  • Repeated critical unauthenticated RCE flaws, some actively exploited
  • Docs admit no isolation between users
  • Zero verified G2 reviews so far

Sources & method

- 10 sources - Poor record: multiple critical unauthenticated RCE CVEs in 2025–2026, several actively exploited in the wild.

official x4review x3security x2news x1
  • CVE-2025-3248, Critical unauthenticated RCE via code validation in the API endpoint; exploited. Affects versions prior to the fix.
  • CVE-2026-5027, Unauthenticated path traversal leading to RCE; observed under active exploitation.
  • CVE-2026-33017, RCE in AI pipelines; researchers documented compromise within 20 hours.
  • No tenant isolation, Official docs state Langflow does not enforce isolation between users within an instance.

Key stats

  • Value for money: 5/5

    Rating

  • $0

    Starting price

  • 10

    Sources

  • Analyzed

  • Value for money: 5/5. Free core; $18/mo managed option
  • Ease of use: 4/5. Visual builder praised; upgrades break flows
  • Feature depth: 4/5. Wide component range for agents and RAG
  • Support quality. Insufficient evidence in sources
  • Security posture: 1/5. Multiple actively exploited RCE CVEs
  • 0.0/5 G2 rating 0 verified reviews on seller page
  • $0 Starting price Open source; managed hosting from $18/mo
  • Yes Free tier Self-hosted open source
  • DataStax Ownership Acquired 2024 (was LogSpace)

Pricing

Open source (self-hosted)

$0

  • Full visual builder
  • Self-managed deployment
  • Community support

Managed hosting (via Elestio)

from $18/mo

  • 2 CPUs, 4GB RAM plan
  • Fully managed instance

Security

Poor record: multiple critical unauthenticated RCE CVEs in 2025–2026, several actively exploited in the wild.

  • CVE-2025-3248Critical unauthenticated RCE via code validation in the API endpoint; exploited. Affects versions prior to the fix.
  • CVE-2026-5027Unauthenticated path traversal leading to RCE; observed under active exploitation.
  • CVE-2026-33017RCE in AI pipelines; researchers documented compromise within 20 hours.
  • No tenant isolationOfficial docs state Langflow does not enforce isolation between users within an instance.10

What users say

Users like the rapid prototyping and clean UI but complain about breaking version upgrades and unclear production readiness.

“After the version update, my old flows aren't…”
Reddit, r/aiagents
“LangFlow has a cleaner UI in my opinion…”
Reddit, r/langflow
“Langflow offers great flexibility with its wide…”
Medium, Argon.co review

Alternatives

Compare Langflow with each alternative.

  • n8n

    Node-based workflow automation with broader integrations; frequent Langflow rival

  • Flowise

    Similar open-source visual builder users call the closest alternative

    Langflow vs Flowise

  • Dify

    All-in-one LLM app platform often compared head-to-head

    Langflow vs Dify

  • LangGraph

    Code-first agent framework for teams outgrowing visual builders

Full analysis

Based on ~20 public sources across reviews, security advisories, pricing pages, and news coverage.

Great free builder for AI agent prototypes — but a repeat offender for exploited RCEs. Don't expose it publicly.

Methodology

Based on ~20 public sources across reviews, security advisories, pricing pages, and news coverage.

Read how a report is made.

Sources

  1. Langflow official sitelangflow.org
    official
  2. Langflow on GitHubgithub.com
    official
  3. We Tried and Tested 8 Langflow Alternatives — ZenMLzenml.io
    review
  4. Is LangFlow Still Worth Using? — Redditreddit.com
    review
  5. Langflow Products — G2 seller pageg2.com
    review
  6. CVE-2025-3248 and CVE-2026-5027: Langflow RCE — Picus Securitypicussecurity.com
    security
  7. Hackers Start Exploiting Critical Langflow Vulnerability — SecurityWeeksecurityweek.com
    security
  8. DataStax acquires the startup behind Langflow — TechCrunchtechcrunch.com
    news
  9. Langflow plans and pricing — Elestioelest.io
    official
  10. Langflow Security docsdocs.langflow.org
    official

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