Open source focus
Open Source Alternatives to Rebellion Defence
60 open source Defense Tech options similar to Rebellion Defence, 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.
NemoClaw75Artificial IntelligenceOpen source · Self-hostable
Agency58Agentic AISan Francisco, United States$20.0MOpen source
Oplane49CybersecurityMalmö, Sweden$4.5MOpen source
- MOModal <> AI27InstructionsSan Francisco, United States
Open source
OpenAI84Artificial IntelligenceSan Francisco, United States$493.9BOpen source
Google DeepMind83Frontier AI LabLondon, United Kingdom$676.7MOpen source
SpaceXAI76Frontier AI LabPalo Alto, United States$90.0BOpen source
Protect AI64CybersecuritySeattle, United States$105.0MOpen source
Lakera AI AG63AI SecurityBerlin, Germany$12.0MOpen source
Galileo Technologies, Inc.61AI ObservabilitySan Francisco, United States$45.0MOpen source
Giskard60Artificial IntelligenceParis, France$2.5MOpen source
- BRBria56Generative AITel Aviv, Israel$130.5M
Open source
MANIFEST56LegalNew York, United States$23.0MOpen source
Tinfoil50CybersecuritySan Francisco, United States$500.3MOpen source
Arcade48Artificial IntelligenceSan Francisco, USA$60.0MOpen source
Fiddler Labs48AI ObservabilityMountain View, United StatesOpen source
Antithesis46CybersecuritySan Francisco, United States$117.5MOpen source
Niyatna AI40Agentic AISan Francisco, United StatesOpen source
Paart40AI GovernanceSan Francisco, United StatesOpen source
Astrasafe35AI GovernanceTel Aviv, Israel$1.5MOpen source
- Adamczyk34Agentic AISan Francisco, United States$1.0M
Open source
- Svitch26AI GovernanceSan Francisco, United States
Open source
Ontic25AI SafetySan Francisco, United States$291.5MOpen source
Vibranium Dome23AI AgentsOpen source · Self-hostable
Oncometra17AI-Driven Drug DiscoveryOpen source
Aemetis15Climate TechCupertino, United StatesOpen source · Self-hostable
PrivateGPT5AI Search EngineToronto, CanadaOpen source · Self-hostable
Axonmedical4HealthTechOpen source
Aitrustapp4Trust and SafetyOpen source
TympanumFoundation ModelOpen source
LairaosFoundation ModelLondon, United KingdomOpen source
RobocurveRoboticsOpen source
LiansAgentic AIOpen source
RegulatediqAI GovernanceOpen source
BingranAgentic AIBerkeley, United StatesOpen source
NykadvisoryAI-Powered AdvisoryOpen source
QuantbeeQuantum ComputingOpen source
Ubuntu85Operating SystemsLondon, United Kingdom$63.0MOpen source · Self-hostable
Cursor80Artificial IntelligenceSan Francisco, United States$2.9BOpen source
DeepSeek AI70AI InfrastructureBeijing, China$15.8BOpen source
Lacentral68Frontier AI LabSan Francisco, United States$11.3BOpen source
Domino Data Lab, Inc.63AI GovernanceNew York, United States$100.5MOpen source
Fiddler Labs, Inc.62MLOpsMountain View, United States$39.0MOpen source
Appwrite61EnterpriseSan Francisco, United States$37.0MOpen source · Self-hostable
Codefresh61EnterpriseBrisbane, Australia$42.0MOpen source · Self-hostable
Holistic AI61AI GovernanceLondon, United Kingdom$335.0MOpen source
SkyfireAI59AerospaceAustin, USA$19.5MOpen source
AA-I Technologies58Frontier AI LabSan Francisco, United States$20.0MOpen source
Backslash Security57CybersecurityTel Aviv, Israel$27.0MOpen source
Salto56DevOpsTel Aviv, Israel$69.0MOpen source
Orqai55Agentic AIAmsterdam, Netherlands$40.0MOpen source
Vijil55Agentic AISan Francisco, United States$17.0MOpen source
Archestra.AI55Artificial IntelligenceLondon, United Kingdom$10.0MOpen source · Self-hostable
Cajal55B2BSan Francisco, United States$4.5MOpen source
Bluebricks55EnterpriseSan Francisco, United States$4.5MOpen source
KiloClaw54Artificial IntelligenceOpen source · Self-hostable
Insomnia54API ManagementSan Francisco, United States$75.0MOpen source
Knostic54Cybersecurity$14.3MOpen source
WSO254Artificial IntelligencePalo Alto, USA$63.0MOpen source · Self-hostable
Datablanket53FireSan Francisco, United States$4.0MOpen source
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| NemoClaw | Artificial Intelligence | Open source · Self-hostable | — | — | 75 | |
| Agency | Agentic AI | Open source | San Francisco, United States | $20.0M | 58 | |
| Oplane | Cybersecurity | Open source | Malmö, Sweden | $4.5M | 49 | |
| MOModal <> AI | Instructions | Open source | San Francisco, United States | — | 27 | |
| OpenAI | Artificial Intelligence | Open source | San Francisco, United States | $493.9B | 84 | |
| Google DeepMind | Frontier AI Lab | Open source | London, United Kingdom | $676.7M | 83 | |
| SpaceXAI | Frontier AI Lab | Open source | Palo Alto, United States | $90.0B | 76 | |
| Protect AI | Cybersecurity | Open source | Seattle, United States | $105.0M | 64 | |
| Lakera AI AG | AI Security | Open source | Berlin, Germany | $12.0M | 63 | |
| Galileo Technologies, Inc. | AI Observability | Open source | San Francisco, United States | $45.0M | 61 | |
| Giskard | Artificial Intelligence | Open source | Paris, France | $2.5M | 60 | |
| BRBria | Generative AI | Open source | Tel Aviv, Israel | $130.5M | 56 | |
| MANIFEST | Legal | Open source | New York, United States | $23.0M | 56 | |
| Tinfoil | Cybersecurity | Open source | San Francisco, United States | $500.3M | 50 | |
| Arcade | Artificial Intelligence | Open source | San Francisco, USA | $60.0M | 48 | |
| Fiddler Labs | AI Observability | Open source | Mountain View, United States | — | 48 | |
| Antithesis | Cybersecurity | Open source | San Francisco, United States | $117.5M | 46 | |
| Niyatna AI | Agentic AI | Open source | San Francisco, United States | — | 40 | |
| Paart | AI Governance | Open source | San Francisco, United States | — | 40 | |
| Astrasafe | AI Governance | Open source | Tel Aviv, Israel | $1.5M | 35 | |
| Agentic AI | Open source | San Francisco, United States | $1.0M | 34 | ||
| AI Governance | Open source | San Francisco, United States | — | 26 | ||
| Ontic | AI Safety | Open source | San Francisco, United States | $291.5M | 25 | |
| Vibranium Dome | AI Agents | Open source · Self-hostable | — | — | 23 | |
| Oncometra | AI-Driven Drug Discovery | Open source | — | — | 17 | |
| Aemetis | Climate Tech | Open source · Self-hostable | Cupertino, United States | — | 15 | |
| PrivateGPT | AI Search Engine | Open source · Self-hostable | Toronto, Canada | — | 5 | |
| Axonmedical | HealthTech | Open source | — | — | 4 | |
| Aitrustapp | Trust and Safety | Open source | — | — | 4 | |
| Tympanum | Foundation Model | Open source | — | — | — | |
| Lairaos | Foundation Model | Open source | London, United Kingdom | — | — | |
| Robocurve | Robotics | Open source | — | — | — | |
| Lians | Agentic AI | Open source | — | — | — | |
| Regulatediq | AI Governance | Open source | — | — | — | |
| Bingran | Agentic AI | Open source | Berkeley, United States | — | — | |
| Nykadvisory | AI-Powered Advisory | Open source | — | — | — | |
| Quantbee | Quantum Computing | Open source | — | — | — | |
| Ubuntu | Operating Systems | Open source · Self-hostable | London, United Kingdom | $63.0M | 85 | |
| Cursor | Artificial Intelligence | Open source | San Francisco, United States | $2.9B | 80 | |
| DeepSeek AI | AI Infrastructure | Open source | Beijing, China | $15.8B | 70 | |
| Lacentral | Frontier AI Lab | Open source | San Francisco, United States | $11.3B | 68 | |
| Domino Data Lab, Inc. | AI Governance | Open source | New York, United States | $100.5M | 63 | |
| Fiddler Labs, Inc. | MLOps | Open source | Mountain View, United States | $39.0M | 62 | |
| Appwrite | Enterprise | Open source · Self-hostable | San Francisco, United States | $37.0M | 61 | |
| Codefresh | Enterprise | Open source · Self-hostable | Brisbane, Australia | $42.0M | 61 | |
| Holistic AI | AI Governance | Open source | London, United Kingdom | $335.0M | 61 | |
| SkyfireAI | Aerospace | Open source | Austin, USA | $19.5M | 59 | |
| AA-I Technologies | Frontier AI Lab | Open source | San Francisco, United States | $20.0M | 58 | |
| Backslash Security | Cybersecurity | Open source | Tel Aviv, Israel | $27.0M | 57 | |
| Salto | DevOps | Open source | Tel Aviv, Israel | $69.0M | 56 | |
| Orqai | Agentic AI | Open source | Amsterdam, Netherlands | $40.0M | 55 | |
| Vijil | Agentic AI | Open source | San Francisco, United States | $17.0M | 55 | |
| Archestra.AI | Artificial Intelligence | Open source · Self-hostable | London, United Kingdom | $10.0M | 55 | |
| Cajal | B2B | Open source | San Francisco, United States | $4.5M | 55 | |
| Bluebricks | Enterprise | Open source | San Francisco, United States | $4.5M | 55 | |
| KiloClaw | Artificial Intelligence | Open source · Self-hostable | — | — | 54 | |
| Insomnia | API Management | Open source | San Francisco, United States | $75.0M | 54 | |
| Knostic | Cybersecurity | Open source | — | $14.3M | 54 | |
| WSO2 | Artificial Intelligence | Open source · Self-hostable | Palo Alto, USA | $63.0M | 54 | |
| Datablanket | Fire | Open source | San Francisco, United States | $4.0M | 53 |