Open source focus
Justemail is open source
Open Source Alternatives to Justemail
60 open source AI Search Engine options similar to Justemail, 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.
Taskade49SpaceTechNew York, United States$1.0MOpen source
AskjoynaAgentic AISan Francisco, United StatesOpen source
Open and AsyncAgentic AISan Francisco, United StatesOpen source
Perplexity AI71Search EngineSan Francisco, United States$591.4MOpen source
Arena71Artificial IntelligenceBerkeley, USA$250.0MOpen source
- MOMoonshot AI68Frontier AI LabBeijing, China$3.9B
Open source
Viktor62Artificial IntelligenceWarsaw, Poland$64.7MOpen source
Vectara60Agentic AIPalo Alto, United States$40.0MOpen source
Bito54AI Coding AssistantSan Francisco, United States$5.7MOpen source
M Magical54Artificial IntelligenceSan Francisco, United StatesOpen source
Isacus46LegalTechTel Aviv, Israel$700KOpen source
Adot43E-commerceSan Francisco, United StatesOpen source
Briefbridge36AI Search EngineTel Aviv, Israel$1.5MOpen source
GrackerAI33Agentic SEOTel Aviv, IsraelOpen source
Andraste32Agentic AISan Francisco, United StatesOpen source
Recallguru21AI Search EngineOpen source
GPT Researcher13Agentic AIOpen source
LlamaAi (DefiLlama)10FintechOpen source
Convo10Voice AISan Francisco, United StatesOpen source
kuafuai8Agentic AIBeijing, ChinaOpen source
Agentradio7AI Coding AssistantOpen source
PrivateGPT5AI Search EngineToronto, CanadaOpen source · Self-hostable
42research4AI Search EngineTel Aviv, IsraelOpen source
TinyFish3Artificial IntelligenceSan Francisco, United StatesOpen source
PostintelligencecontractsLegalTechOpen source
KaliaiFoundation ModelSan Francisco, United StatesOpen source
StepnewsAI Search EngineOpen source
StudyboltEdTechTel Aviv, IsraelOpen source
ZenlawyerLegalTechTel Aviv, IsraelOpen source
SecondarybrainAI Search EngineSan Francisco, United StatesOpen source
VektorsearchpartnersAI Search EngineTel Aviv, IsraelOpen source
MotorwerkGenerative AITel Aviv, IsraelOpen source
GoumiFoundation ModelBeaverton, United StatesOpen source
Coworker.aiHR TechOpen source
- buddy.AI Agent
Open source
AntropusAgentic SEOMadrid, SpainOpen source
RedbuyE-commerceOpen source
BiblelensAI Search EngineOpen source
- ThebabrainAI Search Engine
Open source
PaperswanAI Search EngineSan Francisco, United StatesOpen source
DataforeveryoneAI Search EngineSan Francisco, United StatesOpen source
DowjoFoundation ModelOpen source
FastclaudeAI Search EngineOpen source
OpenAI84Artificial IntelligenceSan Francisco, United States$493.9BOpen source
DeepL82Artificial IntelligenceCologne, Germany$300.0MOpen source
Bloomberg L.P.82FintechNew York, United States$60.1BOpen source
Cursor80Artificial IntelligenceSan Francisco, United States$2.9BOpen source
Together AI76AI InfrastructureSan Francisco, United States$906.0MOpen source · Self-hostable
SpaceXAI76Frontier AI LabPalo Alto, United States$90.0BOpen source
Algolia75Search TechnologySan Francisco, United States$334.2MOpen source
Codeium71Artificial IntelligenceMountain View, United States$396.7MOpen source
DeepSeek AI70AI InfrastructureBeijing, China$15.8BOpen source
OpenRouter70InfrastructureSan Francisco, United States$153.5MOpen source
Pinecone69AI InfrastructureSan Francisco, United States$138.0MOpen source
Lacentral68Frontier AI LabSan Francisco, United States$11.3BOpen source
Stability AI68Generative AILondon, United Kingdom$101.0MOpen source · Self-hostable
Sourcegraph (Cody)66AI Coding AssistantSan Francisco, United States$301.0MOpen source
z.ai65Foundation ModelSan Francisco, USA$1.3BOpen source
Dust65Agentic AIParis, France$15.0MOpen source
TwelveLabs64Video IntelligenceSan Francisco, United States$68.0MOpen source
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| Taskade | SpaceTech | Open source | New York, United States | $1.0M | 49 | |
| Askjoyna | Agentic AI | Open source | San Francisco, United States | — | — | |
| Open and Async | Agentic AI | Open source | San Francisco, United States | — | — | |
| Perplexity AI | Search Engine | Open source | San Francisco, United States | $591.4M | 71 | |
| Arena | Artificial Intelligence | Open source | Berkeley, USA | $250.0M | 71 | |
| MOMoonshot AI | Frontier AI Lab | Open source | Beijing, China | $3.9B | 68 | |
| Viktor | Artificial Intelligence | Open source | Warsaw, Poland | $64.7M | 62 | |
| Vectara | Agentic AI | Open source | Palo Alto, United States | $40.0M | 60 | |
| Bito | AI Coding Assistant | Open source | San Francisco, United States | $5.7M | 54 | |
| M Magical | Artificial Intelligence | Open source | San Francisco, United States | — | 54 | |
| Isacus | LegalTech | Open source | Tel Aviv, Israel | $700K | 46 | |
| Adot | E-commerce | Open source | San Francisco, United States | — | 43 | |
| Briefbridge | AI Search Engine | Open source | Tel Aviv, Israel | $1.5M | 36 | |
| GrackerAI | Agentic SEO | Open source | Tel Aviv, Israel | — | 33 | |
| Andraste | Agentic AI | Open source | San Francisco, United States | — | 32 | |
| Recallguru | AI Search Engine | Open source | — | — | 21 | |
| GPT Researcher | Agentic AI | Open source | — | — | 13 | |
| LlamaAi (DefiLlama) | Fintech | Open source | — | — | 10 | |
| Convo | Voice AI | Open source | San Francisco, United States | — | 10 | |
| kuafuai | Agentic AI | Open source | Beijing, China | — | 8 | |
| Agentradio | AI Coding Assistant | Open source | — | — | 7 | |
| PrivateGPT | AI Search Engine | Open source · Self-hostable | Toronto, Canada | — | 5 | |
| 42research | AI Search Engine | Open source | Tel Aviv, Israel | — | 4 | |
| TinyFish | Artificial Intelligence | Open source | San Francisco, United States | — | 3 | |
| Postintelligencecontracts | LegalTech | Open source | — | — | — | |
| Kaliai | Foundation Model | Open source | San Francisco, United States | — | — | |
| Stepnews | AI Search Engine | Open source | — | — | — | |
| Studybolt | EdTech | Open source | Tel Aviv, Israel | — | — | |
| Zenlawyer | LegalTech | Open source | Tel Aviv, Israel | — | — | |
| Secondarybrain | AI Search Engine | Open source | San Francisco, United States | — | — | |
| Vektorsearchpartners | AI Search Engine | Open source | Tel Aviv, Israel | — | — | |
| Motorwerk | Generative AI | Open source | Tel Aviv, Israel | — | — | |
| Goumi | Foundation Model | Open source | Beaverton, United States | — | — | |
| Coworker.ai | HR Tech | Open source | — | — | — | |
| AI Agent | Open source | — | — | — | ||
| Antropus | Agentic SEO | Open source | Madrid, Spain | — | — | |
| Redbuy | E-commerce | Open source | — | — | — | |
| Biblelens | AI Search Engine | Open source | — | — | — | |
| AI Search Engine | Open source | — | — | — | ||
| Paperswan | AI Search Engine | Open source | San Francisco, United States | — | — | |
| Dataforeveryone | AI Search Engine | Open source | San Francisco, United States | — | — | |
| Dowjo | Foundation Model | Open source | — | — | — | |
| Fastclaude | AI Search Engine | Open source | — | — | — | |
| OpenAI | Artificial Intelligence | Open source | San Francisco, United States | $493.9B | 84 | |
| DeepL | Artificial Intelligence | Open source | Cologne, Germany | $300.0M | 82 | |
| Bloomberg L.P. | Fintech | Open source | New York, United States | $60.1B | 82 | |
| 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 | |
| SpaceXAI | Frontier AI Lab | Open source | Palo Alto, United States | $90.0B | 76 | |
| Algolia | Search Technology | Open source | San Francisco, United States | $334.2M | 75 | |
| Codeium | Artificial Intelligence | Open source | Mountain View, United States | $396.7M | 71 | |
| DeepSeek AI | AI Infrastructure | Open source | Beijing, China | $15.8B | 70 | |
| OpenRouter | Infrastructure | Open source | San Francisco, United States | $153.5M | 70 | |
| Pinecone | AI Infrastructure | Open source | San Francisco, United States | $138.0M | 69 | |
| Lacentral | Frontier AI Lab | Open source | San Francisco, United States | $11.3B | 68 | |
| Stability AI | Generative AI | Open source · Self-hostable | London, United Kingdom | $101.0M | 68 | |
| Sourcegraph (Cody) | AI Coding Assistant | Open source | San Francisco, United States | $301.0M | 66 | |
| z.ai | Foundation Model | Open source | San Francisco, USA | $1.3B | 65 | |
| Dust | Agentic AI | Open source | Paris, France | $15.0M | 65 | |
| TwelveLabs | Video Intelligence | Open source | San Francisco, United States | $68.0M | 64 |