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Letta
Open-source stateful agent harness
Best for Code / Agents · Open-source / Self-host
- Open source
- Free tier
- Code
- Self-host

Mastra
TypeScript agent framework
Best for Code / Agents · Open-source / Self-host
- Open source
- Free tier
- Code
- Self-host

CAMEL-AI
Apache-2.0 multi-agent framework
Best for Code / Agents · Open-source / Self-host
- Open source
- Free tier
- Code
- Self-host

Haystack
Apache-2.0 RAG/agent framework
Best for Research / Chat · Open-source / Self-host
- Open source
- Free tier
- Chat
- Self-host

Activepieces
Open-source automation with agents
Best for Productivity · Open-source / Self-host
- Open source
- Free tier
- Self-host

Chatwoot
Open-source support inbox + Captain AI
Best for Productivity · Open-source / Self-host
- Open source
- Free tier
- Self-host

Promptfoo
Local LLM eval + red team
Best for Code / Agents · Open-source / Self-host
- Open source
- Free tier
- Self-host

Phoenix
Local AI observability
Best for Code / Agents · Open-source / Self-host
- Open source
- Free tier
- Self-host

MindStudio
No-code agent studio
Best for Code / Agents
- Freemium

Type.ai
Long-form story editor
Best for Writing
- Freemium

Voyage AI
Embedding + rerank API
Best for Code / Agents
- Freemium
- Code

Qdrant
Vector search engine
Best for Code / Agents · Open-source / Self-host
- Open source
- Free tier
- Self-host
- Code