OpenSoft

Open source AI app builders

Platforms for building LLM chatbots, agents and RAG workflows. Ranked by health score.

Langfuse

93 · Healthy

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

Free core, paid extrasMIT★ 36kLast commit today

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 today

LangWatch

89 · Healthy

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

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

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 today

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 yesterday

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 today

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 today

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 2 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 today

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 22 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 today

At a glance

Health and license are separate verdicts: a project can be well maintained and still not be open source.

ProjectHealthLicenseStarsLast commit
Langfuse93 · HealthyFree core, paid extrasMIT36ktoday
opencode92 · HealthyFree to useMIT212ktoday
LangWatch89 · HealthyFree core, paid extrasApache-2.04.9ktoday
Onyx88 · HealthyFree core, paid extrasMIT32ktoday
Botpress86 · HealthyFree to useMIT15kyesterday
OpenHands85 · HealthyFree to useMIT90ktoday
Cline83 · HealthyFree to useApache-2.070ktoday
Parlant79 · StableFree to useApache-2.018k3 months ago
Langflow77 · StableFree to useMIT155k2 days ago
SWE-agent73 · StableFree to useMIT21k3 months ago
Dograh72 · StableFree to useBSD-2-Clause5.8ktoday
Helicone67 · StableFree to useApache-2.06.2k22 days ago
Aider48 · CautionFree to useApache-2.049k5 months ago
FlowiseArchivedFree core, paid extrasApache-2.055k2 months ago
Dify91 · HealthyFree with conditionsDify Open Source License158kyesterday
Phoenix77 · StableFree, no resellingElastic License 2.012ktoday

Paid products these replace

Alternatives to BraintrustAlternatives to ChatbaseAlternatives to ChatfuelAlternatives to DevinAlternatives to DocsBot AIAlternatives to LandbotAlternatives to LangSmithAlternatives to LindyAlternatives to ManyChatAlternatives to Microsoft Copilot StudioAlternatives to Relevance AIAlternatives to Retell AIAlternatives to VapiAlternatives to Voiceflow

Scores last refreshed from GitHub on 9 October 2026. How we score.