Open source focus
LettaAI is open source
Open Source Alternatives to LettaAI
60 open source Artificial Intelligence options similar to LettaAI, ranked by named competitors first, sector overlap, and our 0-100 AI-readiness score. Each profile notes license and self-hosting where we have it.
Auto-GPT56Agentic AI$12.0MOpen source · Self-hostable
LangChain61Agentic AISan Francisco, United States$260.0MOpen source
KiloClaw54Artificial IntelligenceOpen source · Self-hostable
OpenAI84Artificial IntelligenceSan Francisco, United States$493.9BOpen source
Entire62Artificial Intelligence$60.0MOpen source · Self-hostable
Embedder (YC S25)61AI AgentsSan Francisco, United States$625.0MOpen source
Giskard60Artificial IntelligenceParis, France$2.5MOpen source
Steel.dev58Developer ToolsTel Aviv, Israel$17.0MOpen source · Self-hostable
xpander.ai57Artificial IntelligenceTel Aviv, Israel$3.0MOpen source
Ultravox.ai52Agentic AISan Francisco, United States$10.0MOpen source
Modal Labs52Agentic AISan Francisco, United States$693.0MOpen source
Turbopuffer51Artificial IntelligenceSan Francisco, USA$12.0MOpen source
Arcade48Artificial IntelligenceSan Francisco, USA$60.0MOpen source
SageOx47Artificial IntelligenceSeattle, USA$15.0MOpen source
Imbue47Artificial IntelligenceSan Francisco, United StatesOpen source
Kiro IDE44Artificial IntelligenceSan Francisco, United StatesOpen source
vibecode.dev44Agentic AISan Francisco, United States$1.5MOpen source
- MIMind Lab41Artificial IntelligenceSan Francisco, United States
Open source
Magick AI28Agentic AIOpen source
Parlant27AI AgentsTel Aviv, IsraelOpen source · Self-hostable
Emdash24Agentic AISan Francisco, United StatesOpen source
Vibranium Dome23AI AgentsOpen source · Self-hostable
Glama20Agentic AIOpen source
- HUHumanSignal7Agentic AI
Open source · Self-hostable
Gravitee4CybersecurityLondon, United KingdomOpen source
CausariAgentic AIOpen source · Self-hostable
- AigentsourceAgentic AI
Open source · Self-hostable
NemoClaw75Artificial IntelligenceOpen source · Self-hostable
Codeium71Artificial IntelligenceMountain View, United States$396.7MOpen source
Osaurus71Artificial IntelligenceSan Francisco, USA$63.0MOpen source
Qdrant70Vector DatabaseBerlin, Germany$96.5MOpen source · Self-hostable
Pinecone69AI InfrastructureSan Francisco, United States$138.0MOpen source
Daytona66AI InfrastructureNew York, United States$46.0MOpen source
Arize AI65AI ObservabilityBerkeley, United StatesOpen source
Dust65Agentic AIParis, France$15.0MOpen source
CopilotKit64Agentic AISan Francisco, United States$42.0MOpen source
Trigger Device Inc63AI AgentsLondon, United Kingdom$16.5MOpen source · Self-hostable
Orkes62Artificial IntelligenceSanta Clara, USA$89.3MOpen source
RadixArk62Artificial IntelligencePalo Alto, USA$20.0MOpen source
FingerprintJS61Customer ServiceSan Francisco, United States$88.0MOpen source
Composio59Agentic AISan Francisco, United States$50.0MOpen source
AgentMail58Agentic AISan Francisco, United States$7.5MOpen source
Agency58Agentic AISan Francisco, United States$20.0MOpen source
Fal58Agentic AISan Francisco, United States$182.3MOpen source
Tavily57Generative AITel Aviv, Israel$5.0MOpen source
Quotient AI56Artificial IntelligenceBoston, United States$5.5MOpen source
Arcten55Agentic AISan Francisco, United StatesOpen source
Vijil55Agentic AISan Francisco, United States$17.0MOpen source
- ESEscape55CybersecurityParis, France$21.9M
Open source
- AGAgentDesk / BrowserTools54Recruitment Tech$17.0M
Open source
WSO254Artificial IntelligencePalo Alto, USA$63.0MOpen source · Self-hostable
giniX54Generative AITel Aviv, IsraelOpen source
Toolbase54Developer ToolsSan Francisco, United StatesOpen source
Mem054Agentic AISan Francisco, United States$24.0MOpen source · Self-hostable
M Magical54Artificial IntelligenceSan Francisco, United StatesOpen source
Langflow53Agentic AILisbon, PortugalOpen source · Self-hostable
Lunar.dev53EnterpriseTel Aviv, Israel$6.0MOpen source
Hyperspell52Agentic AISan Francisco, United States$1.5MOpen source
Manufact Inc.52AI InfrastructureSan Francisco, United States$6.3MOpen source
Arthur51Agentic AISan Francisco, United States$10.0MOpen source
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| Auto-GPT | Agentic AI | Open source · Self-hostable | — | $12.0M | 56 | |
| LangChain | Agentic AI | Open source | San Francisco, United States | $260.0M | 61 | |
| KiloClaw | Artificial Intelligence | Open source · Self-hostable | — | — | 54 | |
| OpenAI | Artificial Intelligence | Open source | San Francisco, United States | $493.9B | 84 | |
| Entire | Artificial Intelligence | Open source · Self-hostable | — | $60.0M | 62 | |
| Embedder (YC S25) | AI Agents | Open source | San Francisco, United States | $625.0M | 61 | |
| Giskard | Artificial Intelligence | Open source | Paris, France | $2.5M | 60 | |
| Steel.dev | Developer Tools | Open source · Self-hostable | Tel Aviv, Israel | $17.0M | 58 | |
| xpander.ai | Artificial Intelligence | Open source | Tel Aviv, Israel | $3.0M | 57 | |
| Ultravox.ai | Agentic AI | Open source | San Francisco, United States | $10.0M | 52 | |
| Modal Labs | Agentic AI | Open source | San Francisco, United States | $693.0M | 52 | |
| Turbopuffer | Artificial Intelligence | Open source | San Francisco, USA | $12.0M | 51 | |
| Arcade | Artificial Intelligence | Open source | San Francisco, USA | $60.0M | 48 | |
| SageOx | Artificial Intelligence | Open source | Seattle, USA | $15.0M | 47 | |
| Imbue | Artificial Intelligence | Open source | San Francisco, United States | — | 47 | |
| Kiro IDE | Artificial Intelligence | Open source | San Francisco, United States | — | 44 | |
| vibecode.dev | Agentic AI | Open source | San Francisco, United States | $1.5M | 44 | |
| MIMind Lab | Artificial Intelligence | Open source | San Francisco, United States | — | 41 | |
| Magick AI | Agentic AI | Open source | — | — | 28 | |
| Parlant | AI Agents | Open source · Self-hostable | Tel Aviv, Israel | — | 27 | |
| Emdash | Agentic AI | Open source | San Francisco, United States | — | 24 | |
| Vibranium Dome | AI Agents | Open source · Self-hostable | — | — | 23 | |
| Glama | Agentic AI | Open source | — | — | 20 | |
| HUHumanSignal | Agentic AI | Open source · Self-hostable | — | — | 7 | |
| Gravitee | Cybersecurity | Open source | London, United Kingdom | — | 4 | |
| Causari | Agentic AI | Open source · Self-hostable | — | — | — | |
| Agentic AI | Open source · Self-hostable | — | — | — | ||
| NemoClaw | Artificial Intelligence | Open source · Self-hostable | — | — | 75 | |
| Codeium | Artificial Intelligence | Open source | Mountain View, United States | $396.7M | 71 | |
| Osaurus | Artificial Intelligence | Open source | San Francisco, USA | $63.0M | 71 | |
| Qdrant | Vector Database | Open source · Self-hostable | Berlin, Germany | $96.5M | 70 | |
| Pinecone | AI Infrastructure | Open source | San Francisco, United States | $138.0M | 69 | |
| Daytona | AI Infrastructure | Open source | New York, United States | $46.0M | 66 | |
| Arize AI | AI Observability | Open source | Berkeley, United States | — | 65 | |
| Dust | Agentic AI | Open source | Paris, France | $15.0M | 65 | |
| CopilotKit | Agentic AI | Open source | San Francisco, United States | $42.0M | 64 | |
| Trigger Device Inc | AI Agents | Open source · Self-hostable | London, United Kingdom | $16.5M | 63 | |
| Orkes | Artificial Intelligence | Open source | Santa Clara, USA | $89.3M | 62 | |
| RadixArk | Artificial Intelligence | Open source | Palo Alto, USA | $20.0M | 62 | |
| FingerprintJS | Customer Service | Open source | San Francisco, United States | $88.0M | 61 | |
| Composio | Agentic AI | Open source | San Francisco, United States | $50.0M | 59 | |
| AgentMail | Agentic AI | Open source | San Francisco, United States | $7.5M | 58 | |
| Agency | Agentic AI | Open source | San Francisco, United States | $20.0M | 58 | |
| Fal | Agentic AI | Open source | San Francisco, United States | $182.3M | 58 | |
| Tavily | Generative AI | Open source | Tel Aviv, Israel | $5.0M | 57 | |
| Quotient AI | Artificial Intelligence | Open source | Boston, United States | $5.5M | 56 | |
| Arcten | Agentic AI | Open source | San Francisco, United States | — | 55 | |
| Vijil | Agentic AI | Open source | San Francisco, United States | $17.0M | 55 | |
| ESEscape | Cybersecurity | Open source | Paris, France | $21.9M | 55 | |
| AGAgentDesk / BrowserTools | Recruitment Tech | Open source | — | $17.0M | 54 | |
| WSO2 | Artificial Intelligence | Open source · Self-hostable | Palo Alto, USA | $63.0M | 54 | |
| giniX | Generative AI | Open source | Tel Aviv, Israel | — | 54 | |
| Toolbase | Developer Tools | Open source | San Francisco, United States | — | 54 | |
| Mem0 | Agentic AI | Open source · Self-hostable | San Francisco, United States | $24.0M | 54 | |
| M Magical | Artificial Intelligence | Open source | San Francisco, United States | — | 54 | |
| Langflow | Agentic AI | Open source · Self-hostable | Lisbon, Portugal | — | 53 | |
| Lunar.dev | Enterprise | Open source | Tel Aviv, Israel | $6.0M | 53 | |
| Hyperspell | Agentic AI | Open source | San Francisco, United States | $1.5M | 52 | |
| Manufact Inc. | AI Infrastructure | Open source | San Francisco, United States | $6.3M | 52 | |
| Arthur | Agentic AI | Open source | San Francisco, United States | $10.0M | 51 |