Open source focus
Open Source Alternatives to Mailsecure
60 open source Cybersecurity options similar to Mailsecure, 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.
TandemTrace35Agentic AIOpen source
Vibranium Dome23AI AgentsOpen source · Self-hostable
- ScambusterAgentic AI
Open source
GuardianlayerCybersecuritySan Francisco, United StatesOpen source
FingerprintJS61Customer ServiceSan Francisco, United States$88.0MOpen source
MetricStream61Governance, Risk, and Compliance (GRC)San Jose, United States$65.0MOpen source
Backslash Security57CybersecurityTel Aviv, Israel$27.0MOpen source
MANIFEST56LegalNew York, United States$23.0MOpen source
XPOZ55MediaTel Aviv, Israel$1.5MOpen source
CipherOwl52FintechSan Francisco, United States$15.0MOpen source
Oplane49CybersecurityMalmö, Sweden$4.5MOpen source
Torch Security49CybersecurityLeawood, United StatesOpen source
Mayhem Security45CybersecurityBethesda, United StatesOpen source
Microsoft43Operating SystemRedmond, United StatesOpen source
Hacktron AI Inc.43CybersecuritySan Francisco, United States$1.0MOpen source
Paart40AI GovernanceSan Francisco, United StatesOpen source
OWASP37CybersecurityRaleigh, USAOpen source · Self-hostable
Helmet Security35CybersecurityWashington, United States$19.0MOpen source
- Svitch26AI GovernanceSan Francisco, United States
Open source
Cyberscope16CybersecurityTel Aviv, IsraelOpen source
0sec11CybersecurityTel Aviv, IsraelOpen source · Self-hostable
Gravitee4CybersecurityLondon, United KingdomOpen source
Aitrustapp4Trust and SafetyOpen source
- ExploitcheckCybersecurity
Open source
RavenclawsAI AgentOpen source
CustomsecureAgentic AIOpen source
LiansAgentic AIOpen source
1Password85CybersecurityToronto, Canada$1.2BOpen source
Forter85FintechNew York, United States$550.0MOpen source
OpenAI84Artificial IntelligenceSan Francisco, United States$493.9BOpen source
Bloomberg L.P.82FintechNew York, United States$60.1BOpen source
Okta79SaaSSan Francisco, United States$187.0MOpen source
Exabeam78EnterpriseFoster City, United States$390.0MOpen source
Coveo75AI Search EngineQuebec City, Canada$315.0MOpen source
NemoClaw75Artificial IntelligenceOpen source · Self-hostable
Algolia75Search TechnologySan Francisco, United States$334.2MOpen source
Vanta75CybersecuritySan Francisco, United States$154.0MOpen source
Manus AI75Agentic AISingapore, Singapore$150.0MOpen source
Codeium71Artificial IntelligenceMountain View, United States$396.7MOpen source
Perplexity AI71Search EngineSan Francisco, United States$591.4MOpen source
Hightouch70Customer Data PlatformSan Francisco, United States$322.0MOpen source
SafeBreach69EnterpriseTel Aviv, Israel$140.5MOpen source
Aqua Security69EnterpriseSan Francisco, United States$400.5MOpen source
LogicGate Risk Cloud68GRCChicago, United States$269.0MOpen source
Tines66Security AutomationDublin, Ireland$260.1MOpen source
Zenity66CybersecuritySan Francisco, United States$59.5MOpen source
Expel66CybersecurityHerndon, United States$267.8MOpen source
Daytona66AI InfrastructureNew York, United States$46.0MOpen source
Aikido Security65CybersecurityGhent, Belgium$84.4MOpen source
Perception Point65EnterpriseTel Aviv, Israel$38.0MOpen source
Dust65Agentic AIParis, France$15.0MOpen source
Coro65EnterpriseNew York, United States$235.0MOpen source
Bland64Voice AISan Francisco, United States$51.0MOpen source
H2O.ai64Foundation ModelMountain View, United States$228.1MOpen source · Self-hostable
RAD Security64CybersecurityTel Aviv, Israel$29.0MOpen source
Protect AI64CybersecuritySeattle, United States$105.0MOpen source
CopilotKit64Agentic AISan Francisco, United States$42.0MOpen source
CertiK63Web3New York, United States$241.5MOpen source
Sarvam AI63Agentic AIBengaluru, India$234.0MOpen source
Intezer63EnterpriseTel Aviv, Israel$58.0MOpen source
| Company | Sector | License | HQ | Funding | Score | Website |
|---|---|---|---|---|---|---|
| TandemTrace | Agentic AI | Open source | — | — | 35 | |
| Vibranium Dome | AI Agents | Open source · Self-hostable | — | — | 23 | |
| Agentic AI | Open source | — | — | — | ||
| Guardianlayer | Cybersecurity | Open source | San Francisco, United States | — | — | |
| FingerprintJS | Customer Service | Open source | San Francisco, United States | $88.0M | 61 | |
| MetricStream | Governance, Risk, and Compliance (GRC) | Open source | San Jose, United States | $65.0M | 61 | |
| Backslash Security | Cybersecurity | Open source | Tel Aviv, Israel | $27.0M | 57 | |
| MANIFEST | Legal | Open source | New York, United States | $23.0M | 56 | |
| XPOZ | Media | Open source | Tel Aviv, Israel | $1.5M | 55 | |
| CipherOwl | Fintech | Open source | San Francisco, United States | $15.0M | 52 | |
| Oplane | Cybersecurity | Open source | Malmö, Sweden | $4.5M | 49 | |
| Torch Security | Cybersecurity | Open source | Leawood, United States | — | 49 | |
| Mayhem Security | Cybersecurity | Open source | Bethesda, United States | — | 45 | |
| Microsoft | Operating System | Open source | Redmond, United States | — | 43 | |
| Hacktron AI Inc. | Cybersecurity | Open source | San Francisco, United States | $1.0M | 43 | |
| Paart | AI Governance | Open source | San Francisco, United States | — | 40 | |
| OWASP | Cybersecurity | Open source · Self-hostable | Raleigh, USA | — | 37 | |
| Helmet Security | Cybersecurity | Open source | Washington, United States | $19.0M | 35 | |
| AI Governance | Open source | San Francisco, United States | — | 26 | ||
| Cyberscope | Cybersecurity | Open source | Tel Aviv, Israel | — | 16 | |
| 0sec | Cybersecurity | Open source · Self-hostable | Tel Aviv, Israel | — | 11 | |
| Gravitee | Cybersecurity | Open source | London, United Kingdom | — | 4 | |
| Aitrustapp | Trust and Safety | Open source | — | — | 4 | |
| Cybersecurity | Open source | — | — | — | ||
| Ravenclaws | AI Agent | Open source | — | — | — | |
| Customsecure | Agentic AI | Open source | — | — | — | |
| Lians | Agentic AI | Open source | — | — | — | |
| 1Password | Cybersecurity | Open source | Toronto, Canada | $1.2B | 85 | |
| Forter | Fintech | Open source | New York, United States | $550.0M | 85 | |
| OpenAI | Artificial Intelligence | Open source | San Francisco, United States | $493.9B | 84 | |
| Bloomberg L.P. | Fintech | Open source | New York, United States | $60.1B | 82 | |
| Okta | SaaS | Open source | San Francisco, United States | $187.0M | 79 | |
| Exabeam | Enterprise | Open source | Foster City, United States | $390.0M | 78 | |
| Coveo | AI Search Engine | Open source | Quebec City, Canada | $315.0M | 75 | |
| NemoClaw | Artificial Intelligence | Open source · Self-hostable | — | — | 75 | |
| Algolia | Search Technology | Open source | San Francisco, United States | $334.2M | 75 | |
| Vanta | Cybersecurity | Open source | San Francisco, United States | $154.0M | 75 | |
| Manus AI | Agentic AI | Open source | Singapore, Singapore | $150.0M | 75 | |
| Codeium | Artificial Intelligence | Open source | Mountain View, United States | $396.7M | 71 | |
| Perplexity AI | Search Engine | Open source | San Francisco, United States | $591.4M | 71 | |
| Hightouch | Customer Data Platform | Open source | San Francisco, United States | $322.0M | 70 | |
| SafeBreach | Enterprise | Open source | Tel Aviv, Israel | $140.5M | 69 | |
| Aqua Security | Enterprise | Open source | San Francisco, United States | $400.5M | 69 | |
| LogicGate Risk Cloud | GRC | Open source | Chicago, United States | $269.0M | 68 | |
| Tines | Security Automation | Open source | Dublin, Ireland | $260.1M | 66 | |
| Zenity | Cybersecurity | Open source | San Francisco, United States | $59.5M | 66 | |
| Expel | Cybersecurity | Open source | Herndon, United States | $267.8M | 66 | |
| Daytona | AI Infrastructure | Open source | New York, United States | $46.0M | 66 | |
| Aikido Security | Cybersecurity | Open source | Ghent, Belgium | $84.4M | 65 | |
| Perception Point | Enterprise | Open source | Tel Aviv, Israel | $38.0M | 65 | |
| Dust | Agentic AI | Open source | Paris, France | $15.0M | 65 | |
| Coro | Enterprise | Open source | New York, United States | $235.0M | 65 | |
| Bland | Voice AI | Open source | San Francisco, United States | $51.0M | 64 | |
| H2O.ai | Foundation Model | Open source · Self-hostable | Mountain View, United States | $228.1M | 64 | |
| RAD Security | Cybersecurity | Open source | Tel Aviv, Israel | $29.0M | 64 | |
| Protect AI | Cybersecurity | Open source | Seattle, United States | $105.0M | 64 | |
| CopilotKit | Agentic AI | Open source | San Francisco, United States | $42.0M | 64 | |
| CertiK | Web3 | Open source | New York, United States | $241.5M | 63 | |
| Sarvam AI | Agentic AI | Open source | Bengaluru, India | $234.0M | 63 | |
| Intezer | Enterprise | Open source | Tel Aviv, Israel | $58.0M | 63 |