Open source focus
Open Source Alternatives to Citefast
60 open source AI Search Engine options similar to Citefast, 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.
GrackerAI33Agentic SEOTel Aviv, IsraelOpen source
AntropusAgentic SEOMadrid, SpainOpen source
ZenlawyerLegalTechTel Aviv, IsraelOpen source
Perplexity AI71Search EngineSan Francisco, United States$591.4MOpen source
Vectara60Agentic AIPalo Alto, United States$40.0MOpen source
Isacus46LegalTechTel Aviv, Israel$700KOpen source
Briefbridge36AI Search EngineTel Aviv, Israel$1.5MOpen source
Firstprinciplesgtm33Agentic AISan Francisco, United StatesOpen source
Andraste32Agentic AISan Francisco, United StatesOpen source
GPT Researcher13Agentic AIOpen source
LlamaAi (DefiLlama)10FintechOpen source
- PRPrivateGPT5AI Search Engine
Open source · Self-hostable
42research4AI Search EngineTel Aviv, IsraelOpen source
TinyFish3Artificial IntelligenceSan Francisco, United StatesOpen source
PaperswanAI Search EngineSan Francisco, United StatesOpen source
TripvaletTravel TechTel Aviv, IsraelOpen source
- ThebabrainAI Search Engine
Open source
AskjoynaAgentic AISan Francisco, United StatesOpen source
StudyboltEdTechTel Aviv, IsraelOpen source
Open and AsyncAgentic AISan Francisco, United StatesOpen source
SecondarybrainAI Search EngineSan Francisco, United StatesOpen source
VektorsearchpartnersAI Search EngineTel Aviv, IsraelOpen source
KaliaiFoundation ModelSan Francisco, United StatesOpen source
DataforeveryoneAI Search EngineSan Francisco, United StatesOpen source
PostintelligencecontractsLegalTechOpen source
Arena71Artificial IntelligenceBerkeley, USA$250.0MOpen source
Pinecone69AI InfrastructureSan Francisco, United States$138.0MOpen source
z.ai65Foundation ModelSan Francisco, USA$1.3BOpen source
Dust65Agentic AIParis, France$15.0MOpen source
Elicit62Artificial IntelligenceOakland, United States$31.0MOpen source
LiteLLM62Foundation ModelSan Francisco, United StatesOpen source · Self-hostable
Composio59Agentic AISan Francisco, United States$50.0MOpen source
- MIMintlify / mcpt57Developer ToolsSan Francisco, United States
Open source
Market Beyond57RetailTechNew York, United States$4.0MOpen source
Tavily57Generative AITel Aviv, Israel$5.0MOpen source
Julius AI55Analytics PlatformSan Francisco, United States$20.5MOpen source
Deepjudge Ai54LegalTechTel Aviv, Israel$53.4MOpen source
Feast AI54MLOpsSan Francisco, United StatesOpen source · Self-hostable
Bito54AI Coding AssistantSan Francisco, United States$5.7MOpen source
Anon53Agentic AI$6.5MOpen source
Plane53Project ManagementSan Francisco, United States$4.0MOpen source
Chalk.ai48LegalTechSan Francisco, United StatesOpen source
Keep47EnterpriseSan Francisco, United States$2.5MOpen source · Self-hostable
Taskade46SpaceTechNew York, United States$1.0MOpen source
Seek AI46AI Coding AssistantTel Aviv, IsraelOpen source
Apideck46API PlatformUnknown, UnknownOpen source
GitHits44Developer ToolsHelsinki, Finland$1.5MOpen source · Self-hostable
Adot43E-commerceSan Francisco, United StatesOpen source
- Why-Health42Productivity
Open source
Haystack42AI Search EngineSan Francisco, United States$10.0MOpen source
- Seo Mcp AI41Agentic SEO
Open source
Raindrop40AI Search EngineMoscow, Russia$32.8MOpen source
Supernova37Developer ToolsSan Francisco, United States$129.2MOpen source
Answers36AI Search EngineSan Francisco, United States$1.5BOpen source
CustomGPT35AI ChatbotTel Aviv, Israel$1.0MOpen source
Qualifire32Generative AIOpen source
MemGPT28Foundation ModelOpen source
Hordus AI25AI Search Engineתל אביב - יפו, IsraelOpen source
Vibranium Dome23AI AgentsOpen source · Self-hostable
Fundamental Research Labs22Frontier AI LabSan Francisco, United States$10.0MOpen source
| Company | Sector | License | HQ | Funding | Score |
|---|---|---|---|---|---|
| GrackerAI | Agentic SEO | Open source | Tel Aviv, Israel | — | 33 |
| Antropus | Agentic SEO | Open source | Madrid, Spain | — | — |
| Zenlawyer | LegalTech | Open source | Tel Aviv, Israel | — | — |
| Perplexity AI | Search Engine | Open source | San Francisco, United States | $591.4M | 71 |
| Vectara | Agentic AI | Open source | Palo Alto, United States | $40.0M | 60 |
| Isacus | LegalTech | Open source | Tel Aviv, Israel | $700K | 46 |
| Briefbridge | AI Search Engine | Open source | Tel Aviv, Israel | $1.5M | 36 |
| Firstprinciplesgtm | Agentic AI | Open source | San Francisco, United States | — | 33 |
| Andraste | Agentic AI | Open source | San Francisco, United States | — | 32 |
| GPT Researcher | Agentic AI | Open source | — | — | 13 |
| LlamaAi (DefiLlama) | Fintech | Open source | — | — | 10 |
| PRPrivateGPT | AI Search Engine | Open source · Self-hostable | — | — | 5 |
| 42research | AI Search Engine | Open source | Tel Aviv, Israel | — | 4 |
| TinyFish | Artificial Intelligence | Open source | San Francisco, United States | — | 3 |
| Paperswan | AI Search Engine | Open source | San Francisco, United States | — | — |
| Tripvalet | Travel Tech | Open source | Tel Aviv, Israel | — | — |
| AI Search Engine | Open source | — | — | — | |
| Askjoyna | Agentic AI | Open source | San Francisco, United States | — | — |
| Studybolt | EdTech | Open source | Tel Aviv, Israel | — | — |
| Open and Async | Agentic AI | Open source | San Francisco, United States | — | — |
| Secondarybrain | AI Search Engine | Open source | San Francisco, United States | — | — |
| Vektorsearchpartners | AI Search Engine | Open source | Tel Aviv, Israel | — | — |
| Kaliai | Foundation Model | Open source | San Francisco, United States | — | — |
| Dataforeveryone | AI Search Engine | Open source | San Francisco, United States | — | — |
| Postintelligencecontracts | LegalTech | Open source | — | — | — |
| Arena | Artificial Intelligence | Open source | Berkeley, USA | $250.0M | 71 |
| Pinecone | AI Infrastructure | Open source | San Francisco, United States | $138.0M | 69 |
| z.ai | Foundation Model | Open source | San Francisco, USA | $1.3B | 65 |
| 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 |
| Composio | Agentic AI | Open source | San Francisco, United States | $50.0M | 59 |
| MIMintlify / mcpt | Developer Tools | Open source | San Francisco, United States | — | 57 |
| Market Beyond | RetailTech | Open source | New York, United States | $4.0M | 57 |
| Tavily | Generative AI | Open source | Tel Aviv, Israel | $5.0M | 57 |
| Julius AI | Analytics Platform | Open source | San Francisco, United States | $20.5M | 55 |
| Deepjudge Ai | LegalTech | Open source | Tel Aviv, Israel | $53.4M | 54 |
| Feast AI | MLOps | Open source · Self-hostable | San Francisco, United States | — | 54 |
| Bito | AI Coding Assistant | Open source | San Francisco, United States | $5.7M | 54 |
| Anon | Agentic AI | Open source | — | $6.5M | 53 |
| Plane | Project Management | Open source | San Francisco, United States | $4.0M | 53 |
| Chalk.ai | LegalTech | Open source | San Francisco, United States | — | 48 |
| Keep | Enterprise | Open source · Self-hostable | San Francisco, United States | $2.5M | 47 |
| Taskade | SpaceTech | Open source | New York, United States | $1.0M | 46 |
| Seek AI | AI Coding Assistant | Open source | Tel Aviv, Israel | — | 46 |
| Apideck | API Platform | Open source | Unknown, Unknown | — | 46 |
| GitHits | Developer Tools | Open source · Self-hostable | Helsinki, Finland | $1.5M | 44 |
| Adot | E-commerce | Open source | San Francisco, United States | — | 43 |
| Productivity | Open source | — | — | 42 | |
| Haystack | AI Search Engine | Open source | San Francisco, United States | $10.0M | 42 |
| Agentic SEO | Open source | — | — | 41 | |
| Raindrop | AI Search Engine | Open source | Moscow, Russia | $32.8M | 40 |
| Supernova | Developer Tools | Open source | San Francisco, United States | $129.2M | 37 |
| Answers | AI Search Engine | Open source | San Francisco, United States | $1.5B | 36 |
| CustomGPT | AI Chatbot | Open source | Tel Aviv, Israel | $1.0M | 35 |
| Qualifire | Generative AI | Open source | — | — | 32 |
| MemGPT | Foundation Model | Open source | — | — | 28 |
| Hordus AI | AI Search Engine | Open source | תל אביב - יפו, Israel | — | 25 |
| Vibranium Dome | AI Agents | Open source · Self-hostable | — | — | 23 |
| Fundamental Research Labs | Frontier AI Lab | Open source | San Francisco, United States | $10.0M | 22 |