Alternatives to Castle
The top Cybersecurity companies similar to Castle, ranked by relevance (named competitors first, then how closely their sectors overlap) and our 0-100 AI-readiness score. Each links to a full profile with funding and team.
Arkose Labs55CybersecuritySan Francisco, USA$104.5M- SISift38Marketing$4.3M
FingerprintJS61Customer ServiceSan Francisco, United States$87.0M
HUMAN Security (HUMAN Sightline Cyberfraud Defense, MediaGuard)61CybersecurityNew York, United States$753.0M
Stytch61AuthenticationSan Francisco, USA$127.0M
WorkOS, Inc.59Identity & Access ManagementSan Francisco, United States
WMC Global57CybersecurityFremont, USA$63.0M
Veriti56EnterpriseSan Francisco, United States$28.0M
Spectral55EnterpriseTel Aviv, Israel$6.2M
Netacea Bot Management54CybersecurityLondon, United Kingdom$52.4M- TRTruffle Security47CybersecuritySan Francisco, United States$30.0M
ORY47Identity & Access ManagementBerlin, Germany$17.0M
SlashID43CybersecuritySan Francisco, United States
Checkmate41CybersecurityNew York, United States$10.0M- Darkid40CybersecurityTel Aviv, Israel
Slauth.io40EnterpriseAshburn, United States$1.5M
PropelAuth37Software DevelopmentRedwood City, US$1.5M
Elefend Security35Cybersecurity
Loqr34Identity & Access ManagementPorto, Portugal$1.5M
Cipherwake30Cybersecurity
Rescana25CybersecurityTel Aviv, Israel
Google reCAPTCHA Enterprise25CybersecurityMountain View, United States
GeeTest CAPTCHA25CybersecurityShanghai, China
Visitor Filters23CybersecuritySilistra, Bulgaria
eSEOspace7Cybersecurity
Gravitee4CybersecurityLondon, United Kingdom
ShieldSquare1CybersecurityBengaluru, India$1.5M
IPQualityScoreCybersecurityPhiladelphia, United States- SingleauthIdentity & Access
Auth075Identity & Access Management (IAM)Bellevue, United States$282.4M
Tailscale74CybersecuritySan Francisco, United States$505.0M
WorkOS71Developer ToolsSan Francisco, United States$198.0M
Dazz70EnterpriseSan Francisco, United States$125.0M
Salt Security69EnterprisePalo Alto, United States$270.0M
Cycode68CybersecurityTel Aviv, Israel$80.6M- IDID.me65Identity VerificationMcLean, United States$1.2B
Aikido Security65CybersecurityGhent, Belgium$84.4M
Torq64EnterpriseNew York, United States$190.0M
NanoCo63Artificial IntelligenceSan Francisco, USA$12.0M
Cyware63CybersecurityWilmington, United States$21.0M
CertiK63Web3New York, United States$241.5M
Prime Security62EnterpriseTel Aviv, Israel$26.0M
Team Cymru62CybersecurityOrem, USA$63.0M
Feedzai60FintechSan Mateo, United States$436.5M
Radiant Security59EnterpriseSan Francisco, United States$15.0M
Steel.dev58Developer ToolsTel Aviv, Israel$17.0M
ThreatFabric58CybersecurityTel Aviv, Israel$3.5M
Backslash Security57CybersecurityTel Aviv, Israel$27.0M
Kasada57CybersecurityNew York, United States$84.9M
Token Security57EnterpriseSan Francisco, United States$27.0M
Aim Security57Generative AITel Aviv, Israel$28.0M
IronVest57DataNew York, United States$23.0M
Boost Security57CybersecuritySan Francisco, USA$12.0M
AKEYLESS57EnterpriseTel Aviv, Israel$79.0M- SHShape Security57CybersecuritySanta Clara, United States$15.0M
AuthMind57EnterpriseSan Francisco, United States$27.8M
Reveal Security56EnterpriseTel Aviv, Israel$16.0M- CLClerk56Developer ToolsSan Francisco, United States$69.0M
Pynt55CybersecurityTel Aviv, Israel$6.0M
Retruster55EnterpriseNew York, United States
| Company | Sector | HQ | Funding | Score |
|---|---|---|---|---|
| Arkose Labs | Cybersecurity | San Francisco, USA | $104.5M | 55 |
| SISift | Marketing | — | $4.3M | 38 |
| FingerprintJS | Customer Service | San Francisco, United States | $87.0M | 61 |
| HUMAN Security (HUMAN Sightline Cyberfraud Defense, MediaGuard) | Cybersecurity | New York, United States | $753.0M | 61 |
| Stytch | Authentication | San Francisco, USA | $127.0M | 61 |
| WorkOS, Inc. | Identity & Access Management | San Francisco, United States | — | 59 |
| WMC Global | Cybersecurity | Fremont, USA | $63.0M | 57 |
| Veriti | Enterprise | San Francisco, United States | $28.0M | 56 |
| Spectral | Enterprise | Tel Aviv, Israel | $6.2M | 55 |
| Netacea Bot Management | Cybersecurity | London, United Kingdom | $52.4M | 54 |
| TRTruffle Security | Cybersecurity | San Francisco, United States | $30.0M | 47 |
| ORY | Identity & Access Management | Berlin, Germany | $17.0M | 47 |
| SlashID | Cybersecurity | San Francisco, United States | — | 43 |
| Checkmate | Cybersecurity | New York, United States | $10.0M | 41 |
| Cybersecurity | Tel Aviv, Israel | — | 40 | |
| Slauth.io | Enterprise | Ashburn, United States | $1.5M | 40 |
| PropelAuth | Software Development | Redwood City, US | $1.5M | 37 |
| Elefend Security | Cybersecurity | — | — | 35 |
| Loqr | Identity & Access Management | Porto, Portugal | $1.5M | 34 |
| Cipherwake | Cybersecurity | — | — | 30 |
| Rescana | Cybersecurity | Tel Aviv, Israel | — | 25 |
| Google reCAPTCHA Enterprise | Cybersecurity | Mountain View, United States | — | 25 |
| GeeTest CAPTCHA | Cybersecurity | Shanghai, China | — | 25 |
| Visitor Filters | Cybersecurity | Silistra, Bulgaria | — | 23 |
| eSEOspace | Cybersecurity | — | — | 7 |
| Gravitee | Cybersecurity | London, United Kingdom | — | 4 |
| ShieldSquare | Cybersecurity | Bengaluru, India | $1.5M | 1 |
| IPQualityScore | Cybersecurity | Philadelphia, United States | — | — |
| Identity & Access | — | — | — | |
| Auth0 | Identity & Access Management (IAM) | Bellevue, United States | $282.4M | 75 |
| Tailscale | Cybersecurity | San Francisco, United States | $505.0M | 74 |
| WorkOS | Developer Tools | San Francisco, United States | $198.0M | 71 |
| Dazz | Enterprise | San Francisco, United States | $125.0M | 70 |
| Salt Security | Enterprise | Palo Alto, United States | $270.0M | 69 |
| Cycode | Cybersecurity | Tel Aviv, Israel | $80.6M | 68 |
| IDID.me | Identity Verification | McLean, United States | $1.2B | 65 |
| Aikido Security | Cybersecurity | Ghent, Belgium | $84.4M | 65 |
| Torq | Enterprise | New York, United States | $190.0M | 64 |
| NanoCo | Artificial Intelligence | San Francisco, USA | $12.0M | 63 |
| Cyware | Cybersecurity | Wilmington, United States | $21.0M | 63 |
| CertiK | Web3 | New York, United States | $241.5M | 63 |
| Prime Security | Enterprise | Tel Aviv, Israel | $26.0M | 62 |
| Team Cymru | Cybersecurity | Orem, USA | $63.0M | 62 |
| Feedzai | Fintech | San Mateo, United States | $436.5M | 60 |
| Radiant Security | Enterprise | San Francisco, United States | $15.0M | 59 |
| Steel.dev | Developer Tools | Tel Aviv, Israel | $17.0M | 58 |
| ThreatFabric | Cybersecurity | Tel Aviv, Israel | $3.5M | 58 |
| Backslash Security | Cybersecurity | Tel Aviv, Israel | $27.0M | 57 |
| Kasada | Cybersecurity | New York, United States | $84.9M | 57 |
| Token Security | Enterprise | San Francisco, United States | $27.0M | 57 |
| Aim Security | Generative AI | Tel Aviv, Israel | $28.0M | 57 |
| IronVest | Data | New York, United States | $23.0M | 57 |
| Boost Security | Cybersecurity | San Francisco, USA | $12.0M | 57 |
| AKEYLESS | Enterprise | Tel Aviv, Israel | $79.0M | 57 |
| SHShape Security | Cybersecurity | Santa Clara, United States | $15.0M | 57 |
| AuthMind | Enterprise | San Francisco, United States | $27.8M | 57 |
| Reveal Security | Enterprise | Tel Aviv, Israel | $16.0M | 56 |
| CLClerk | Developer Tools | San Francisco, United States | $69.0M | 56 |
| Pynt | Cybersecurity | Tel Aviv, Israel | $6.0M | 55 |
| Retruster | Enterprise | New York, United States | — | 55 |