{"company":{"id":4417376,"name":"Castellum Security Collective","domain":"castellumsecurity.nl","url":"https://alion.io/company/castellumsecurity"},"answer":"As of Nov 14, 2026, Alion lists 10 companies most like Castellum Security Collective: Prosegur, Securitas Colombia, Secom, WorldSecurity, Avarn Security, Securitas België, Prosegur, G4S Secure Solutions, BM Security and Panorama Alarm Systems and Security Services.","highlights":["Castellum Security Collective itself has 31 open roles on Alion.","Of them, Prosegur is hiring the most, with 7 open roles."],"as_of":"2026-11-14","cite":"Alion, \"Castellum Security Collective competitors and alternatives: 10 similar companies compared on hiring and funding\", as of Nov 14, 2026. https://alion.io/company/castellumsecurity/competitors","indexable":true,"target":{"name":"Castellum Security Collective","url":"https://alion.io/company/castellumsecurity","domain":"castellumsecurity.nl","open_roles":31,"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":"Rijsenhout","country":"NL"},"technologies":["Windows","Scala","SQL"],"hiring_countries":["NL"],"similarity":null},"competitors":[{"name":"Prosegur","url":"https://alion.io/company/prosegur-3","domain":"prosegur.com.co","open_roles":7,"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":"Madrid","country":"ES"},"technologies":["SQL","Linux","Windows"],"hiring_countries":["CO"],"similarity":{"score":17.92,"shared_segments":["Security Services","Access Control & Alarm Systems","Video Surveillance"],"shared_technologies":["SQL","Windows"],"same_hq_country":false}},{"name":"Securitas Colombia","url":"https://alion.io/company/securitas-com-co","domain":"securitas.com.co","open_roles":3,"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":"Bogotá","country":"CO"},"technologies":[],"hiring_countries":["CO"],"similarity":{"score":15.25,"shared_segments":["Security Services","Access Control & Alarm Systems","Video 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Surveillance"],"shared_technologies":[],"same_hq_country":false}},{"name":"WorldSecurity","url":"https://alion.io/company/worldsecurity","domain":"worldsecurity.gr","open_roles":2,"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":"Athens","country":"GR"},"technologies":[],"hiring_countries":["GR"],"similarity":{"score":15.25,"shared_segments":["Security Services","Access Control & Alarm Systems","Video Surveillance"],"shared_technologies":[],"same_hq_country":false}},{"name":"Avarn Security","url":"https://alion.io/company/avarnsecurity-fi","domain":"avarnsecurity.fi","open_roles":2,"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":"Vantaa","country":"FI"},"technologies":[],"hiring_countries":["FI"],"similarity":{"score":15.25,"shared_segments":["Security Services","Access Control & Alarm Systems","Video Surveillance"],"shared_technologies":[],"same_hq_country":false}},{"name":"Securitas België","url":"https://alion.io/company/securitas-be","domain":"securitas.be","open_roles":0,"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":"Machelen","country":"BE"},"technologies":["Incident Management"],"hiring_countries":[],"similarity":{"score":15.25,"shared_segments":["Security Services","Video Surveillance","Access Control & Alarm Systems"],"shared_technologies":[],"same_hq_country":false}},{"name":"Prosegur","url":"https://alion.io/company/prosegur-2","domain":"prosegur.cl","open_roles":0,"open_roles_change":null,"funding":{"total_raised_usd":null,"last_round":null,"last_round_usd":null,"last_round_date":null,"lead_investors":[]},"size_band":"5000+","headquarters":{"city":"Renca","country":"CL"},"technologies":["Power BI","Microsoft Excel"],"hiring_countries":[],"similarity":{"score":15.25,"shared_segments":["Security Services","Access Control & Alarm Systems","Video Surveillance"],"shared_technologies":[],"same_hq_country":false}},{"name":"G4S Secure Solutions","url":"https://alion.io/company/g4s-secure-solutions","domain":"g4s.at","open_roles":1,"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":"Salzburg","country":"AT"},"technologies":[],"hiring_countries":["AT"],"similarity":{"score":15.25,"shared_segments":["Security Services","Access Control & Alarm Systems","Video Surveillance"],"shared_technologies":[],"same_hq_country":false}},{"name":"BM Security","url":"https://alion.io/company/bmsecurity","domain":"bmsecurity.com","open_roles":2,"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":"Nairobi","country":"KE"},"technologies":["CAPA","Wi-Fi","TCP/IP"],"hiring_countries":["KE"],"similarity":{"score":15.08,"shared_segments":["Video Surveillance","Access Control & Alarm Systems","Security Services"],"shared_technologies":["Windows"],"same_hq_country":false}},{"name":"Panorama Alarm Systems and Security Services","url":"https://alion.io/company/panorama-alarm-systems-and-security-services","domain":"panoramazambia.com","open_roles":0,"open_roles_change":null,"funding":{"total_raised_usd":null,"last_round":null,"last_round_usd":null,"last_round_date":null,"lead_investors":[]},"size_band":"1001-5000","headquarters":{"city":"Kitwe","country":"ZM"},"technologies":["Active Directory","Wi-Fi","VPN"],"hiring_countries":[],"similarity":{"score":15.08,"shared_segments":["Access Control & Alarm Systems","Video Surveillance","Security Services"],"shared_technologies":["Windows"],"same_hq_country":false}}],"method":"Ranked by Alion's similar-companies engine (the MCP tool similar_companies): shared industry 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/castellumsecurity/competitors","json_url":"https://alion.io/company/castellumsecurity/competitors.json","license":"CC BY-SA 4.0","meta":{"source":"Alion","built_at":"2026-11-14T03:58:57Z","generated_at":"2026-11-14T06:24:47Z"}}