Open source focus
LetsDefend is open source
Open Source Alternatives to LetsDefend
60 open source Cybersecurity options similar to LetsDefend, 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.
Mandiant68CybersecurityReston, United States$220.0MOpen source
Corelight67Network SecuritySan Francisco, United States$284.2MOpen source
Expel66CybersecurityHerndon, United States$267.8MOpen source
Perception Point65EnterpriseTel Aviv, Israel$38.0MOpen source
Intezer63EnterpriseTel Aviv, Israel$58.0MOpen source
LogRhythm62CybersecurityBoulder, United States$90.0MOpen source
Hack The Box56CybersecurityAthens, GreeceOpen source
Secdo55EnterpriseNew York City, United States$11.0MOpen source
CyberGuard AI47CybersecurityDurham, United Kingdom$1.0BOpen source
SOC Prime36CybersecurityBoston, United States$21.5MOpen source
Secuvy32CybersecurityOttawa, CanadaOpen source
Aemetis15Climate TechCupertino, United StatesOpen source · Self-hostable
Snyk85AI Coding AssistantBoston, United States$488.5MOpen source · Self-hostable
WWT85CybersecuritySt. Louis, USA$63.0MOpen source
Forter85FintechNew York, United States$550.0MOpen source
1Password85CybersecurityToronto, Canada$1.2BOpen source
OpenAI84Artificial IntelligenceSan Francisco, United States$493.9BOpen source
Okta79SaaSSan Francisco, United States$187.0MOpen source
Exabeam78EnterpriseFoster City, United States$390.0MOpen source
Vanta75CybersecuritySan Francisco, United States$154.0MOpen source
Auth075Identity & Access Management (IAM)Bellevue, United States$282.4MOpen source
Tailscale74CybersecuritySan Francisco, United States$505.0MOpen source
Crunchbase70DataSan Francisco, United StatesOpen source
- LALacework70AISan Jose, United States$1.3B
Open source
XBOW69CybersecuritySeattle, United States$215.0MOpen source
Talon Cyber Security69EnterpriseNew York, United States$126.0MOpen source
Aqua Security69EnterpriseSan Francisco, United States$400.5MOpen source
Sysdig69CybersecuritySan Francisco, USA$608.0MOpen source
SafeBreach69EnterpriseTel Aviv, Israel$140.5MOpen source
Teleport69CybersecurityOakland, United States$190.0MOpen source
LogicGate Risk Cloud68GRCChicago, United States$269.0MOpen source
Chainalysis67FintechNew York, United States$170.0MOpen source
Flashpoint66CybersecurityNew York, USA$63.0MOpen source
Tines66Security AutomationDublin, Ireland$260.1MOpen source
Zenity66CybersecuritySan Francisco, United States$59.5MOpen source
Cockroach Labs65EnterpriseNew York, United States$308.1MOpen source
Coro65EnterpriseNew York, United States$235.0MOpen source
Aikido Security65CybersecurityGhent, Belgium$84.4MOpen source
Protect AI64CybersecuritySeattle, United States$105.0MOpen source
Habana Labs64ComputingTel Aviv, Israel$105.0MOpen source
RAD Security64CybersecurityTel Aviv, Israel$29.0MOpen source
- EVEvervault63Data PrivacyDublin, Ireland$43.2M
Open source
Lakera AI AG63AI SecurityBerlin, Germany$12.0MOpen source
Aurora Labs63AutomotiveTel Aviv, Israel$99.6MOpen source
Tracebit63CybersecurityLondon, United Kingdom$25.0MOpen source
- YUYubico63CybersecurityStockholm, Sweden
Open source
Oligo Security63EnterpriseTel Aviv, Israel$70.0MOpen source · Self-hostable
CertiK63Web3New York, United States$241.5MOpen source
CyCognito63EnterprisePalo Alto, United States$153.0MOpen source
Nagomi Security63CybersecuritySan Francisco, United States$30.0MOpen source
Demisto62EnterpriseSan Francisco, United States$69.0MOpen source
NinjaOne62SoftwareAustin, United States$1.2BOpen source
Veracode62CybersecurityBurlington, United States$40.0MOpen source
FossID62SoftwareStockholm, Sweden$63.0MOpen source
Team Cymru62CybersecurityOrem, USA$63.0MOpen source
Ox Security62EnterpriseBoston, United States$154.0MOpen source
Estratégia Concursos62EdTechSão Paulo, Brazil$100.0MOpen source
Privy62Web3New York, United States$41.3MOpen source
Artemis Global Technologies62CybersecuritySan Francisco, United States$85.0MOpen source
Chainguard62CybersecuritySeattle, United States$385.0MOpen source · Self-hostable
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| Mandiant | Cybersecurity | Open source | Reston, United States | $220.0M | 68 | |
| Corelight | Network Security | Open source | San Francisco, United States | $284.2M | 67 | |
| Expel | Cybersecurity | Open source | Herndon, United States | $267.8M | 66 | |
| Perception Point | Enterprise | Open source | Tel Aviv, Israel | $38.0M | 65 | |
| Intezer | Enterprise | Open source | Tel Aviv, Israel | $58.0M | 63 | |
| LogRhythm | Cybersecurity | Open source | Boulder, United States | $90.0M | 62 | |
| Hack The Box | Cybersecurity | Open source | Athens, Greece | — | 56 | |
| Secdo | Enterprise | Open source | New York City, United States | $11.0M | 55 | |
| CyberGuard AI | Cybersecurity | Open source | Durham, United Kingdom | $1.0B | 47 | |
| SOC Prime | Cybersecurity | Open source | Boston, United States | $21.5M | 36 | |
| Secuvy | Cybersecurity | Open source | Ottawa, Canada | — | 32 | |
| Aemetis | Climate Tech | Open source · Self-hostable | Cupertino, United States | — | 15 | |
| Snyk | AI Coding Assistant | Open source · Self-hostable | Boston, United States | $488.5M | 85 | |
| WWT | Cybersecurity | Open source | St. Louis, USA | $63.0M | 85 | |
| Forter | Fintech | Open source | New York, United States | $550.0M | 85 | |
| 1Password | Cybersecurity | Open source | Toronto, Canada | $1.2B | 85 | |
| OpenAI | Artificial Intelligence | Open source | San Francisco, United States | $493.9B | 84 | |
| Okta | SaaS | Open source | San Francisco, United States | $187.0M | 79 | |
| Exabeam | Enterprise | Open source | Foster City, United States | $390.0M | 78 | |
| Vanta | Cybersecurity | Open source | San Francisco, United States | $154.0M | 75 | |
| Auth0 | Identity & Access Management (IAM) | Open source | Bellevue, United States | $282.4M | 75 | |
| Tailscale | Cybersecurity | Open source | San Francisco, United States | $505.0M | 74 | |
| Crunchbase | Data | Open source | San Francisco, United States | — | 70 | |
| LALacework | AI | Open source | San Jose, United States | $1.3B | 70 | |
| XBOW | Cybersecurity | Open source | Seattle, United States | $215.0M | 69 | |
| Talon Cyber Security | Enterprise | Open source | New York, United States | $126.0M | 69 | |
| Aqua Security | Enterprise | Open source | San Francisco, United States | $400.5M | 69 | |
| Sysdig | Cybersecurity | Open source | San Francisco, USA | $608.0M | 69 | |
| SafeBreach | Enterprise | Open source | Tel Aviv, Israel | $140.5M | 69 | |
| Teleport | Cybersecurity | Open source | Oakland, United States | $190.0M | 69 | |
| LogicGate Risk Cloud | GRC | Open source | Chicago, United States | $269.0M | 68 | |
| Chainalysis | Fintech | Open source | New York, United States | $170.0M | 67 | |
| Flashpoint | Cybersecurity | Open source | New York, USA | $63.0M | 66 | |
| Tines | Security Automation | Open source | Dublin, Ireland | $260.1M | 66 | |
| Zenity | Cybersecurity | Open source | San Francisco, United States | $59.5M | 66 | |
| Cockroach Labs | Enterprise | Open source | New York, United States | $308.1M | 65 | |
| Coro | Enterprise | Open source | New York, United States | $235.0M | 65 | |
| Aikido Security | Cybersecurity | Open source | Ghent, Belgium | $84.4M | 65 | |
| Protect AI | Cybersecurity | Open source | Seattle, United States | $105.0M | 64 | |
| Habana Labs | Computing | Open source | Tel Aviv, Israel | $105.0M | 64 | |
| RAD Security | Cybersecurity | Open source | Tel Aviv, Israel | $29.0M | 64 | |
| EVEvervault | Data Privacy | Open source | Dublin, Ireland | $43.2M | 63 | |
| Lakera AI AG | AI Security | Open source | Berlin, Germany | $12.0M | 63 | |
| Aurora Labs | Automotive | Open source | Tel Aviv, Israel | $99.6M | 63 | |
| Tracebit | Cybersecurity | Open source | London, United Kingdom | $25.0M | 63 | |
| YUYubico | Cybersecurity | Open source | Stockholm, Sweden | — | 63 | |
| Oligo Security | Enterprise | Open source · Self-hostable | Tel Aviv, Israel | $70.0M | 63 | |
| CertiK | Web3 | Open source | New York, United States | $241.5M | 63 | |
| CyCognito | Enterprise | Open source | Palo Alto, United States | $153.0M | 63 | |
| Nagomi Security | Cybersecurity | Open source | San Francisco, United States | $30.0M | 63 | |
| Demisto | Enterprise | Open source | San Francisco, United States | $69.0M | 62 | |
| NinjaOne | Software | Open source | Austin, United States | $1.2B | 62 | |
| Veracode | Cybersecurity | Open source | Burlington, United States | $40.0M | 62 | |
| FossID | Software | Open source | Stockholm, Sweden | $63.0M | 62 | |
| Team Cymru | Cybersecurity | Open source | Orem, USA | $63.0M | 62 | |
| Ox Security | Enterprise | Open source | Boston, United States | $154.0M | 62 | |
| Estratégia Concursos | EdTech | Open source | São Paulo, Brazil | $100.0M | 62 | |
| Privy | Web3 | Open source | New York, United States | $41.3M | 62 | |
| Artemis Global Technologies | Cybersecurity | Open source | San Francisco, United States | $85.0M | 62 | |
| Chainguard | Cybersecurity | Open source · Self-hostable | Seattle, United States | $385.0M | 62 |