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letta-ai/letta GitHub file list: AGENTS.md, Apache-2.0, README for stateful agents
Code / Agents

Letta

Open-source stateful agent harness

Best for Code / Agents · Open-source / Self-host

  • Open source
  • Free tier
  • Code
  • Self-host
mastra-ai/mastra GitHub file list: .agents/skills, agent-sdks, Apache-2.0
Code / Agents

Mastra

TypeScript agent framework

Best for Code / Agents · Open-source / Self-host

  • Open source
  • Free tier
  • Code
  • Self-host
camel-ai/camel GitHub file list: camel/, examples/, Apache-2.0 multi-agent framework
Code / Agents

CAMEL-AI

Apache-2.0 multi-agent framework

Best for Code / Agents · Open-source / Self-host

  • Open source
  • Free tier
  • Code
  • Self-host
deepset-ai/haystack GitHub file list: haystack/, examples/, Apache-2.0 orchestration framework
Research / Chat

Haystack

Apache-2.0 RAG/agent framework

Best for Research / Chat · Open-source / Self-host

  • Open source
  • Free tier
  • Chat
  • Self-host
stanfordnlp/dspy GitHub file list: dspy folder, MIT LICENSE, README, release 3.4.1
Code / Agents

DSPy

MIT Python LM programming framework

Best for Code / Agents · Open-source / Self-host

  • Open source
  • Code
  • Self-host
Activepieces Agents workspace: Chat, Agents, Flows sidebar and New agent
Productivity

Activepieces

Open-source automation with agents

Best for Productivity · Open-source / Self-host

  • Open source
  • Free tier
  • Self-host
chroma-core/chroma GitHub file list: chromadb folder, Apache-2.0 in About
Code / Agents

Chroma

Apache-2.0 embedding DB

Best for Code / Agents · Open-source / Self-host

  • Open source
  • Code
  • Self-host
chatwoot/chatwoot GitHub file list: app folder, MIT License in About
Productivity

Chatwoot

Open-source support inbox + Captain AI

Best for Productivity · Open-source / Self-host

  • Open source
  • Free tier
  • Self-host
hiyouga/LLaMA-Factory GitHub file list: src folder, Apache-2.0 in About
Code / Agents

LLaMA-Factory

Apache-2.0 fine-tune UI

Best for Code / Agents · Open-source / Self-host

  • Open source
  • Code
  • Self-host
botpress/botpress GitHub file list: integrations, packages, plugins, MIT in About
Marketing

Botpress

Agent studio + desk

Best for Marketing · Open-source / Self-host

  • Open source
  • Freemium
  • Chat
Unstructured-IO/unstructured GitHub file list: unstructured folder, Apache-2.0 in About
Code / Agents

Unstructured

Document ETL

Best for Code / Agents · Open-source / Self-host

  • Open source
  • Freemium
  • Self-host
promptfoo/promptfoo GitHub file list: examples folder, MIT in About
Code / Agents

Promptfoo

Local LLM eval + red team

Best for Code / Agents · Open-source / Self-host

  • Open source
  • Free tier
  • Self-host