{"company":{"id":3088,"name":"Horizon3","domain":"horizon3.ai","url":"https://alion.io/company/horizon3"},"answer":"As of Nov 13, 2026, Alion lists 10 companies most like Horizon3: A, HackerOne, Bugcrowd, Xbow, Bishop Fox, Synack, Cracken, Sybil, Safe Security and Depthfirst.","highlights":["Horizon3 itself has 193 open roles on Alion.","Of them, Depthfirst is hiring the most, with 21 open roles.","Bugcrowd has raised the most venture funding on record: $189.2M.","Open roles at Depthfirst rose the most: from 19 on Oct 12, 2026 to 21 now."],"as_of":"2026-11-13","cite":"Alion, \"Horizon3 competitors and alternatives: 10 similar companies compared on hiring and funding\", as of Nov 13, 2026. https://alion.io/company/horizon3/competitors","indexable":true,"target":{"name":"Horizon3","url":"https://alion.io/company/horizon3","domain":"horizon3.ai","open_roles":193,"open_roles_change":{"since":"2026-10-12","from":125,"to":193,"pct":54},"funding":{"total_raised_usd":390000000,"last_round":"series_e","last_round_usd":250000000,"last_round_date":"2026-08-03","lead_investors":["Craft Ventures"]},"size_band":"201-500","headquarters":{"city":"San Francisco","country":"US"},"technologies":["AWS","Python","Azure"],"hiring_countries":["US","NL","SG"],"similarity":null},"competitors":[{"name":"A","url":"https://alion.io/company/a-security","domain":"a.security","open_roles":4,"open_roles_change":null,"funding":{"total_raised_usd":null,"last_round":null,"last_round_usd":null,"last_round_date":null,"lead_investors":[]},"size_band":"11-50","headquarters":{"city":"Tel Aviv","country":"IL"},"technologies":["AWS","Azure","GCP"],"hiring_countries":["IL"],"similarity":{"score":19.65,"shared_segments":["Penetration Testing","Vulnerability Management","Cybersecurity AI"],"shared_technologies":["Python","SQL","PostgreSQL","GCP","GraphQL"],"same_hq_country":false}},{"name":"HackerOne","url":"https://alion.io/company/hackerone","domain":"hackerone.com","open_roles":14,"open_roles_change":null,"funding":{"total_raised_usd":null,"last_round":null,"last_round_usd":null,"last_round_date":null,"lead_investors":[]},"size_band":"201-500","headquarters":{"city":"San Francisco","country":"US"},"technologies":["AI Agents","Anthropic","Red Teaming"],"hiring_countries":["US","IN","GB"],"similarity":{"score":19.25,"shared_segments":["Penetration Testing","Vulnerability 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Fox","url":"https://alion.io/company/bishop-fox","domain":"bishopfox.com","open_roles":11,"open_roles_change":null,"funding":{"total_raised_usd":87691355,"last_round":"venture","last_round_usd":51136364,"last_round_date":"2022-06-17","lead_investors":[]},"size_band":"201-500","headquarters":{"city":"Tempe","country":"US"},"technologies":["Python","AWS","LLM"],"hiring_countries":["MX","US"],"similarity":{"score":18.45,"shared_segments":["Penetration Testing","Vulnerability Management"],"shared_technologies":["Python","Go","TypeScript","C++","GCP"],"same_hq_country":true}},{"name":"Synack","url":"https://alion.io/company/synack","domain":"synack.net","open_roles":9,"open_roles_change":null,"funding":{"total_raised_usd":null,"last_round":null,"last_round_usd":null,"last_round_date":null,"lead_investors":[]},"size_band":null,"headquarters":{"city":"Washington","country":"US"},"technologies":["AI Agents","GCP","Python"],"hiring_countries":["GB","US"],"similarity":{"score":17.22,"shared_segments":["Penetration Testing","Vulnerability Management"],"shared_technologies":["Python","Go","TypeScript","SQL","GCP"],"same_hq_country":true}},{"name":"Cracken","url":"https://alion.io/company/cracken","domain":"cracken.ai","open_roles":9,"open_roles_change":null,"funding":{"total_raised_usd":null,"last_round":null,"last_round_usd":null,"last_round_date":null,"lead_investors":[]},"size_band":"201-500","headquarters":{"city":"Palo Alto","country":"US"},"technologies":["AI Agents","React.js","GitHub"],"hiring_countries":["US"],"similarity":{"score":17.22,"shared_segments":["Penetration Testing","Cybersecurity AI"],"shared_technologies":["Python","TypeScript","C++","PostgreSQL","AI Agents"],"same_hq_country":true}},{"name":"Sybil","url":"https://alion.io/company/runsybil","domain":"runsybil.com","open_roles":4,"open_roles_change":null,"funding":{"total_raised_usd":null,"last_round":null,"last_round_usd":null,"last_round_date":null,"lead_investors":[]},"size_band":"51-200","headquarters":{"city":"San Francisco","country":"US"},"technologies":["OpenAI","AI Agents","Python"],"hiring_countries":["US"],"similarity":{"score":16.87,"shared_segments":["Penetration Testing","Cybersecurity AI"],"shared_technologies":["Python","TypeScript","PostgreSQL","GCP","AI Agents"],"same_hq_country":true}},{"name":"Safe Security","url":"https://alion.io/company/safe-security","domain":"safe.security","open_roles":19,"open_roles_change":null,"funding":{"total_raised_usd":null,"last_round":null,"last_round_usd":null,"last_round_date":null,"lead_investors":[]},"size_band":"51-200","headquarters":{"city":"Palo Alto","country":"US"},"technologies":["Python","AWS","Amazon 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segments and the overlap of the two segment sets, technologies named in both companies' job postings, the same headquarters country, a size band near it. Open roles are the visible postings on Alion today; their change is shown only for boards that state posting dates.","html_url":"https://alion.io/company/horizon3/competitors","json_url":"https://alion.io/company/horizon3/competitors.json","license":"CC BY-SA 4.0","meta":{"source":"Alion","built_at":"2026-11-13T03:07:25Z","generated_at":"2026-11-13T11:56:25Z"}}