OpenTools

Open source AI app builders

Langfuse

93 · Healthy

Tracing, evaluation and prompt management for LLM applications and agents.

Free core, paid extrasMIT★ 36kLast commit yesterday

opencode

92 · Healthy

Terminal coding agent that works with many model providers and can edit, run and test code in your repository.

Free to useMIT★ 212kLast commit yesterday

LangWatch

89 · Healthy

Observability, evaluations and agent simulations for teams running LLM agents in production.

Free core, paid extrasApache-2.0★ 4.9kLast commit yesterday

Onyx

88 · Healthy

AI search and chat over your company's documents, with connectors for Slack, Google Drive, Confluence and more.

Free core, paid extrasMIT★ 32kLast commit yesterday

Botpress

86 · Healthy

Studio for building LLM chatbots and agents, with knowledge bases and connectors for web chat, WhatsApp and other channels.

Free to useMIT★ 15kLast commit 2 days ago

OpenHands

85 · Healthy

AI coding agent you can run yourself. Give it an issue and it edits code, runs commands and tests in a sandbox, then opens a pull request, with whichever LLM you choose.

Free to useMIT★ 90kLast commit yesterday

Cline

83 · Healthy

Autonomous coding agent for VS Code and the command line that plans changes, edits files and runs commands with your approval.

Free to useApache-2.0★ 70kLast commit yesterday

Parlant

79 · Stable

Framework for customer-facing AI agents that follow explicit guidelines, so their answers stay consistent and on policy.

Free to useApache-2.0★ 18kLast commit 3 months ago

Langflow

77 · Stable

Visual builder for AI agents and RAG workflows, with a Python API.

Free to useMIT★ 155kLast commit 3 days ago

SWE-agent

73 · Stable

Research agent that takes a GitHub issue and tries to fix it automatically with the language model of your choice.

Free to useMIT★ 21kLast commit 3 months ago

Dograh

72 · Stable

Voice AI platform for building phone agents, with a visual workflow editor, telephony support and your choice of speech and LLM providers.

Free to useBSD-2-Clause★ 5.8kLast commit yesterday

Helicone

67 · Stable

Proxy-based LLM observability that logs requests, costs and latency with one line of setup.

Free to useApache-2.0★ 6.2kLast commit 23 days ago

Aider

48 · Caution

AI pair programmer in the terminal that edits code in your git repository and commits each change.

Free to useApache-2.0★ 49kLast commit 5 months ago

Flowise

Archived

Drag-and-drop builder for LLM agents and chatflows.

Free core, paid extrasApache-2.0★ 55kLast commit 2 months ago

Source-available and unverified licenses

The code for these is public, but the license is not an OSI open source license, or we have not verified it yet. Check the license notes on each project before relying on it.

Dify

91 · Healthy

Platform for building LLM apps, agents and RAG pipelines with a visual workflow editor.

Free with conditionsDify Open Source License★ 158kLast commit yesterday

Phoenix

77 · Stable

Tracing and evaluation for LLM apps built on OpenTelemetry, with datasets and experiments.

Free, no resellingElastic License 2.0★ 12kLast commit yesterday

Langflow

Visual builder for AI agents and RAG workflows, with a Python API.

Alternative to

Will it still be around?

Stable

Score 77/100

Details

Can a business use it freely?

Free to use

MIT · open source (permissive)

Details
Langflow screenshot 1

Flat Rate Deploy

Monthly cost

Langflow on OpenTools
$39
Microsoft Copilot Studio
$200

You save each month

$161/mo

81% less than today

Saving from month one

You save

Over 3 years
$5,796
In year one
$1,932

List price checked 8 Oct 2026 · Source · Disclaimer

Health score: 77/100

Stable · activity, bus factor and issue responsiveness, from GitHub

Score v2 · How it works

Activity

45% weight

100/100

  • Last commit 3 days ago (100/100).
  • 2488 commits in the past 12 months (100/100).
  • 45 releases in the past 12 months (100/100).

Bus factor

30% weight

36/100

  • Top contributor wrote 73% of the last 100 commits (past 12 months).
  • 13 people authored those commits.

Responsiveness

25% weight

84/100

  • 94% of all issues are closed (198 open, 3335 closed) (100/100).
  • 22 of 30 recent issues got a reply or were closed (73/100).

License

Free to use

MIT · Open source (permissive)

What you need to do

Use, change, host and sell it for any purpose, commercial included, with no license to buy. Keep the copyright notice.

MIT License · Open source (permissive). OSI-approved license with few conditions beyond keeping the copyright notice.

Detected by GitHub as MIT.

GitHub activity

Stars
155k
Forks
10k
Commits, 12 mo
2.5k
last 3 days ago
Releases, 12 mo
45
last 3 days ago
Contributors
366
13 in last 100 commits
Open issues
198
3.3k closed

Snapshot from 2026-10-08

Top contributors

Points for pull requests merged into Langflow and reviews of them since 10 October 2025. Building something another user asked for earns more. 140 people have points on Langflow in all.

  1. 13,680 points
  2. 23,511 points
  3. 32,471 points
  4. 42,360 points
  5. 51,924 points
  6. 61,842 points
  7. 71,637 points
  8. 81,235 points
  9. 91,154 points
  10. 10900 points
Bespoke · we set it up$3,000onceFlat Rate Deploy$39/mo