Open source focus
Open Source Alternatives to Viewbook
60 open source AI Tool options similar to Viewbook, 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.
Pendo66Product AnalyticsRaleigh, United States$458.5MOpen source
Briefbridge23AI Search EngineTel Aviv, Israel$1.5MOpen source
Langchain-Chatchat11Open SourceOpen source · Self-hostable
Coworker.aiHR TechOpen source
Composio59Agentic AISan Francisco, United States$50.0MOpen source
Bito54AI Coding AssistantSan Francisco, United States$5.7MOpen source
Seek AI46AI Coding AssistantTel Aviv, IsraelOpen source
Andraste32Agentic AISan Francisco, United StatesOpen source
GPT Researcher13Agentic AIOpen source
- PRPrivateGPT5AI Search Engine
Open source · Self-hostable
AskjoynaAgentic AISan Francisco, United StatesOpen source
ZenlawyerLegalTechTel Aviv, IsraelOpen source
ClauderizerAI Coding AssistantOpen source
KaliaiFoundation ModelSan Francisco, United StatesOpen source
- ThebabrainAI Search Engine
Open source
DataforeveryoneAI Search EngineSan Francisco, United StatesOpen source
Perplexity AI71Search EngineSan Francisco, United States$591.4MOpen source
Pinecone69AI InfrastructureSan Francisco, United States$138.0MOpen source
Dust65Agentic AIParis, France$15.0MOpen source
Elicit62Artificial IntelligenceOakland, United States$31.0MOpen source
LiteLLM62Foundation ModelSan Francisco, United StatesOpen source · Self-hostable
Vectara60Agentic AIPalo Alto, United States$40.0MOpen source
Modular58AI InfrastructureSan Francisco, United States$380.0MOpen source
Langfuse GmbH58MLOpsBerlin, Germany$2.5MOpen source
- MIMintlify / mcpt57Developer ToolsSan Francisco, United States
Open source
Deepjudge Ai54LegalTechTel Aviv, Israel$53.4MOpen source
Feast AI54MLOpsSan Francisco, United StatesOpen source · Self-hostable
Chalk.ai48LegalTechSan Francisco, United StatesOpen source
Apideck46API PlatformUnknown, UnknownOpen source
Isacus46LegalTechTel Aviv, Israel$700KOpen source
Kiro IDE44Artificial IntelligenceSan Francisco, United StatesOpen source
GitHits44Developer ToolsHelsinki, Finland$1.5MOpen source · Self-hostable
- Why-Health42Productivity
Open source
Haystack42AI Search EngineSan Francisco, United States$10.0MOpen source
ScaleKit42MLOpsSan Francisco, United States$5.5MOpen source
- MIMind Lab41Artificial IntelligenceSan Francisco, United States
Open source
Supernova37Developer ToolsSan Francisco, United States$129.2MOpen source
CustomGPT35AI ChatbotTel Aviv, Israel$1.0MOpen source
AIMLAPI30Machine LearningOpen source
MemGPT28Foundation ModelOpen source
Vibranium Dome23AI AgentsOpen source · Self-hostable
Langbase20Agentic AISan Francisco, United StatesOpen source
WebWright11API PlatformOpen source
- POPostgres MCP10DatabaseSan Francisco, United States
Open source
LlamaAi (DefiLlama)10FintechOpen source
kuafuai8Agentic AIBeijing, ChinaOpen source
Helixaai8Foundation ModelOpen source
42research4AI Search EngineTel Aviv, IsraelOpen source
TinyFish3Artificial IntelligenceSan Francisco, United StatesOpen source
SecondarybrainAI Search EngineSan Francisco, United StatesOpen source
Open and AsyncAgentic AISan Francisco, United StatesOpen source
PaperswanAI Search EngineSan Francisco, United StatesOpen source
PostintelligencecontractsLegalTechOpen source
VektorsearchpartnersAI Search EngineTel Aviv, IsraelOpen source
JustemailAI Search EngineTel Aviv, IsraelOpen source
FastclaudeAI Search EngineOpen source
Denser AIAI ChatbotTel Aviv, IsraelOpen source
StudyboltEdTechTel Aviv, IsraelOpen source
Cursor80Artificial IntelligenceSan Francisco, United States$2.9BOpen source
Together AI76AI InfrastructureSan Francisco, United States$906.0MOpen source · Self-hostable
| Company | Sector | License | HQ | Funding | Score |
|---|---|---|---|---|---|
| Pendo | Product Analytics | Open source | Raleigh, United States | $458.5M | 66 |
| Briefbridge | AI Search Engine | Open source | Tel Aviv, Israel | $1.5M | 23 |
| Langchain-Chatchat | Open Source | Open source · Self-hostable | — | — | 11 |
| Coworker.ai | HR Tech | Open source | — | — | — |
| Composio | Agentic AI | Open source | San Francisco, United States | $50.0M | 59 |
| Bito | AI Coding Assistant | Open source | San Francisco, United States | $5.7M | 54 |
| Seek AI | AI Coding Assistant | Open source | Tel Aviv, Israel | — | 46 |
| Andraste | Agentic AI | Open source | San Francisco, United States | — | 32 |
| GPT Researcher | Agentic AI | Open source | — | — | 13 |
| PRPrivateGPT | AI Search Engine | Open source · Self-hostable | — | — | 5 |
| Askjoyna | Agentic AI | Open source | San Francisco, United States | — | — |
| Zenlawyer | LegalTech | Open source | Tel Aviv, Israel | — | — |
| Clauderizer | AI Coding Assistant | Open source | — | — | — |
| Kaliai | Foundation Model | Open source | San Francisco, United States | — | — |
| AI Search Engine | Open source | — | — | — | |
| Dataforeveryone | AI Search Engine | Open source | San Francisco, United States | — | — |
| 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 |
| Dust | Agentic AI | Open source | Paris, France | $15.0M | 65 |
| Elicit | Artificial Intelligence | Open source | Oakland, United States | $31.0M | 62 |
| LiteLLM | Foundation Model | Open source · Self-hostable | San Francisco, United States | — | 62 |
| Vectara | Agentic AI | Open source | Palo Alto, United States | $40.0M | 60 |
| Modular | AI Infrastructure | Open source | San Francisco, United States | $380.0M | 58 |
| Langfuse GmbH | MLOps | Open source | Berlin, Germany | $2.5M | 58 |
| MIMintlify / mcpt | Developer Tools | Open source | San Francisco, United States | — | 57 |
| Deepjudge Ai | LegalTech | Open source | Tel Aviv, Israel | $53.4M | 54 |
| Feast AI | MLOps | Open source · Self-hostable | San Francisco, United States | — | 54 |
| Chalk.ai | LegalTech | Open source | San Francisco, United States | — | 48 |
| Apideck | API Platform | Open source | Unknown, Unknown | — | 46 |
| Isacus | LegalTech | Open source | Tel Aviv, Israel | $700K | 46 |
| Kiro IDE | Artificial Intelligence | Open source | San Francisco, United States | — | 44 |
| GitHits | Developer Tools | Open source · Self-hostable | Helsinki, Finland | $1.5M | 44 |
| Productivity | Open source | — | — | 42 | |
| Haystack | AI Search Engine | Open source | San Francisco, United States | $10.0M | 42 |
| ScaleKit | MLOps | Open source | San Francisco, United States | $5.5M | 42 |
| MIMind Lab | Artificial Intelligence | Open source | San Francisco, United States | — | 41 |
| Supernova | Developer Tools | Open source | San Francisco, United States | $129.2M | 37 |
| CustomGPT | AI Chatbot | Open source | Tel Aviv, Israel | $1.0M | 35 |
| AIMLAPI | Machine Learning | Open source | — | — | 30 |
| MemGPT | Foundation Model | Open source | — | — | 28 |
| Vibranium Dome | AI Agents | Open source · Self-hostable | — | — | 23 |
| Langbase | Agentic AI | Open source | San Francisco, United States | — | 20 |
| WebWright | API Platform | Open source | — | — | 11 |
| POPostgres MCP | Database | Open source | San Francisco, United States | — | 10 |
| LlamaAi (DefiLlama) | Fintech | Open source | — | — | 10 |
| kuafuai | Agentic AI | Open source | Beijing, China | — | 8 |
| Helixaai | Foundation Model | Open source | — | — | 8 |
| 42research | AI Search Engine | Open source | Tel Aviv, Israel | — | 4 |
| TinyFish | Artificial Intelligence | Open source | San Francisco, United States | — | 3 |
| Secondarybrain | AI Search Engine | Open source | San Francisco, United States | — | — |
| Open and Async | Agentic AI | Open source | San Francisco, United States | — | — |
| Paperswan | AI Search Engine | Open source | San Francisco, United States | — | — |
| Postintelligencecontracts | LegalTech | Open source | — | — | — |
| Vektorsearchpartners | AI Search Engine | Open source | Tel Aviv, Israel | — | — |
| Justemail | AI Search Engine | Open source | Tel Aviv, Israel | — | — |
| Fastclaude | AI Search Engine | Open source | — | — | — |
| Denser AI | AI Chatbot | Open source | Tel Aviv, Israel | — | — |
| Studybolt | EdTech | Open source | Tel Aviv, Israel | — | — |
| Cursor | Artificial Intelligence | Open source | San Francisco, United States | $2.9B | 80 |
| Together AI | AI Infrastructure | Open source · Self-hostable | San Francisco, United States | $906.0M | 76 |