Open source focus
Open Source Alternatives to Plexoai
60 open source AI Search Engine options similar to Plexoai, 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.
Haystack42AI Search EngineSan Francisco, United States$10.0MOpen source
- MOMoonshot AI68Frontier AI LabBeijing, China$3.9B
Open source
Entire62Artificial Intelligence$60.0MOpen source · Self-hostable
Graphite55AI Coding AssistantSan Francisco, United StatesOpen source
Bito54AI Coding AssistantSan Francisco, United States$5.7MOpen source
GitHits44Developer ToolsHelsinki, Finland$1.5MOpen source · Self-hostable
Briefbridge36AI Search EngineTel Aviv, Israel$1.5MOpen source
Answers36AI Search EngineSan Francisco, United States$1.5BOpen source
Openvisio18Developer ToolsOpen source
Langchain-Chatchat11Open SourceOpen source · Self-hostable
PrivateGPT5AI Search EngineToronto, CanadaOpen source · Self-hostable
EvolvinglabAgentic AIOpen source
FastclaudeAI Search EngineOpen source
CommitbenchAI Coding AssistantOpen source
VektorsearchpartnersAI Search EngineTel Aviv, IsraelOpen source
ClauderizerAI Coding AssistantOpen source
OpenAI84Artificial IntelligenceSan Francisco, United States$493.9BOpen source
Perplexity AI71Search EngineSan Francisco, United States$591.4MOpen source
Pinecone69AI InfrastructureSan Francisco, United States$138.0MOpen source
Sourcegraph (Cody)66AI Coding AssistantSan Francisco, United States$301.0MOpen source
cubic65Supply ChainTel Aviv, IsraelOpen source
Dust65Agentic AIParis, France$15.0MOpen source
Qodo64AI Coding AssistantTel Aviv, Israel$1.5MOpen source
LiteLLM62Foundation ModelSan Francisco, United StatesOpen source · Self-hostable
Embedder (YC S25)61AI AgentsSan Francisco, United States$625.0MOpen source
Weaviate60Vector DatabaseAmsterdam, NetherlandsOpen source
Vectara60Agentic AIPalo Alto, United States$40.0MOpen source
Composio59Agentic AISan Francisco, United States$50.0MOpen source
Tavily57Generative AITel Aviv, Israel$5.0MOpen source
CodeRabbit56AI Coding AssistantTel Aviv, Israel$120.0MOpen source
Mem054Agentic AISan Francisco, United States$24.0MOpen source · Self-hostable
Feast AI54MLOpsSan Francisco, United StatesOpen source · Self-hostable
Toolbase54Developer ToolsSan Francisco, United StatesOpen source
LlamaIndex Inc.53Foundation ModelSan Francisco, United StatesOpen source · Self-hostable
RelAI51Agentic AISan Francisco, United States$10.0MOpen source · Self-hostable
nao Labs50Agentic AISan Francisco, United StatesOpen source
All-Hands AI50Agentic AIBoston, United States$5.0MOpen source · Self-hostable
bolt.new49AI Coding AssistantSan Francisco, United StatesOpen source
Chalk.ai48LegalTechSan Francisco, United StatesOpen source
Imbue47Artificial IntelligenceSan Francisco, United StatesOpen source
Glue46Agentic AISan Francisco, United States$4.2MOpen source · Self-hostable
Seek AI46AI Coding AssistantTel Aviv, IsraelOpen source
Isacus46LegalTechTel Aviv, Israel$700KOpen source
- GRGreptile44AI Coding AssistantSan Francisco, United States$6.5M
Open source
Kiro IDE44Artificial IntelligenceSan Francisco, United StatesOpen source
Blink41Agentic AISan Francisco, United StatesOpen source
Supernova37Developer ToolsSan Francisco, United States$129.2MOpen source
Blacksmith Software35AI Coding AssistantSan Francisco, United States$15.0MOpen source
Andraste32Agentic AISan Francisco, United StatesOpen source
QUBRID30Cloud InfrastructureOpen source
TensorZero29AI Coding AssistantSan Francisco, United States$7.3MOpen source
MemGPT28Foundation ModelOpen source
Gemini CLI27AI Tools & AppsOpen source · Self-hostable
Kilo Code20Agentic AISan Francisco, United StatesOpen source · Self-hostable
Langbase20Agentic AISan Francisco, United StatesOpen source
CodeLane18AI Coding AssistantTel Aviv, IsraelOpen source
StartupHub.ai17AI Search EngineTel Aviv, IsraelOpen source
GPT Researcher13Agentic AIOpen source
OpenDevin11AI Agent PlatformOpen source · Self-hostable
WebWright11API PlatformOpen source
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| Haystack | AI Search Engine | Open source | San Francisco, United States | $10.0M | 42 | |
| MOMoonshot AI | Frontier AI Lab | Open source | Beijing, China | $3.9B | 68 | |
| Entire | Artificial Intelligence | Open source · Self-hostable | — | $60.0M | 62 | |
| Graphite | AI Coding Assistant | Open source | San Francisco, United States | — | 55 | |
| Bito | AI Coding Assistant | Open source | San Francisco, United States | $5.7M | 54 | |
| GitHits | Developer Tools | Open source · Self-hostable | Helsinki, Finland | $1.5M | 44 | |
| Briefbridge | AI Search Engine | Open source | Tel Aviv, Israel | $1.5M | 36 | |
| Answers | AI Search Engine | Open source | San Francisco, United States | $1.5B | 36 | |
| Openvisio | Developer Tools | Open source | — | — | 18 | |
| Langchain-Chatchat | Open Source | Open source · Self-hostable | — | — | 11 | |
| PrivateGPT | AI Search Engine | Open source · Self-hostable | Toronto, Canada | — | 5 | |
| Evolvinglab | Agentic AI | Open source | — | — | — | |
| Fastclaude | AI Search Engine | Open source | — | — | — | |
| Commitbench | AI Coding Assistant | Open source | — | — | — | |
| Vektorsearchpartners | AI Search Engine | Open source | Tel Aviv, Israel | — | — | |
| Clauderizer | AI Coding Assistant | Open source | — | — | — | |
| OpenAI | Artificial Intelligence | Open source | San Francisco, United States | $493.9B | 84 | |
| Perplexity AI | Search Engine | Open source | San Francisco, United States | $591.4M | 71 | |
| Pinecone | AI Infrastructure | Open source | San Francisco, United States | $138.0M | 69 | |
| Sourcegraph (Cody) | AI Coding Assistant | Open source | San Francisco, United States | $301.0M | 66 | |
| cubic | Supply Chain | Open source | Tel Aviv, Israel | — | 65 | |
| Dust | Agentic AI | Open source | Paris, France | $15.0M | 65 | |
| Qodo | AI Coding Assistant | Open source | Tel Aviv, Israel | $1.5M | 64 | |
| LiteLLM | Foundation Model | Open source · Self-hostable | San Francisco, United States | — | 62 | |
| Embedder (YC S25) | AI Agents | Open source | San Francisco, United States | $625.0M | 61 | |
| Weaviate | Vector Database | Open source | Amsterdam, Netherlands | — | 60 | |
| Vectara | Agentic AI | Open source | Palo Alto, United States | $40.0M | 60 | |
| Composio | Agentic AI | Open source | San Francisco, United States | $50.0M | 59 | |
| Tavily | Generative AI | Open source | Tel Aviv, Israel | $5.0M | 57 | |
| CodeRabbit | AI Coding Assistant | Open source | Tel Aviv, Israel | $120.0M | 56 | |
| Mem0 | Agentic AI | Open source · Self-hostable | San Francisco, United States | $24.0M | 54 | |
| Feast AI | MLOps | Open source · Self-hostable | San Francisco, United States | — | 54 | |
| Toolbase | Developer Tools | Open source | San Francisco, United States | — | 54 | |
| LlamaIndex Inc. | Foundation Model | Open source · Self-hostable | San Francisco, United States | — | 53 | |
| RelAI | Agentic AI | Open source · Self-hostable | San Francisco, United States | $10.0M | 51 | |
| nao Labs | Agentic AI | Open source | San Francisco, United States | — | 50 | |
| All-Hands AI | Agentic AI | Open source · Self-hostable | Boston, United States | $5.0M | 50 | |
| bolt.new | AI Coding Assistant | Open source | San Francisco, United States | — | 49 | |
| Chalk.ai | LegalTech | Open source | San Francisco, United States | — | 48 | |
| Imbue | Artificial Intelligence | Open source | San Francisco, United States | — | 47 | |
| Glue | Agentic AI | Open source · Self-hostable | San Francisco, United States | $4.2M | 46 | |
| Seek AI | AI Coding Assistant | Open source | Tel Aviv, Israel | — | 46 | |
| Isacus | LegalTech | Open source | Tel Aviv, Israel | $700K | 46 | |
| GRGreptile | AI Coding Assistant | Open source | San Francisco, United States | $6.5M | 44 | |
| Kiro IDE | Artificial Intelligence | Open source | San Francisco, United States | — | 44 | |
| Blink | Agentic AI | Open source | San Francisco, United States | — | 41 | |
| Supernova | Developer Tools | Open source | San Francisco, United States | $129.2M | 37 | |
| Blacksmith Software | AI Coding Assistant | Open source | San Francisco, United States | $15.0M | 35 | |
| Andraste | Agentic AI | Open source | San Francisco, United States | — | 32 | |
| QUBRID | Cloud Infrastructure | Open source | — | — | 30 | |
| TensorZero | AI Coding Assistant | Open source | San Francisco, United States | $7.3M | 29 | |
| MemGPT | Foundation Model | Open source | — | — | 28 | |
| Gemini CLI | AI Tools & Apps | Open source · Self-hostable | — | — | 27 | |
| Kilo Code | Agentic AI | Open source · Self-hostable | San Francisco, United States | — | 20 | |
| Langbase | Agentic AI | Open source | San Francisco, United States | — | 20 | |
| CodeLane | AI Coding Assistant | Open source | Tel Aviv, Israel | — | 18 | |
| StartupHub.ai | AI Search Engine | Open source | Tel Aviv, Israel | — | 17 | |
| GPT Researcher | Agentic AI | Open source | — | — | 13 | |
| OpenDevin | AI Agent Platform | Open source · Self-hostable | — | — | 11 | |
| WebWright | API Platform | Open source | — | — | 11 |