Exostar competitors and alternatives
As of Nov 15, 2026, Alion lists 10 companies most like Exostar: Mattermost, Slack, Arctiq, Security Risk Advisors, Onit, Claroty, 1Kosmos, JumpCloud, Valiant Solutions and Seekr.
- Exostar itself has 17 open roles on Alion.
- Of them, Valiant Solutions is hiring the most, with 41 open roles.
- JumpCloud has raised the most venture funding on record: $342.5M.
Exostar and its competitors compared
Open roles are the postings Alion lists today; their change is shown only for career sites that state posting dates. Funding is the venture money on record. A dash means Alion holds no figure.
| Company | Open roles | Raised | Last round | Employees | Headquarters | Main technologies | Hiring in |
|---|---|---|---|---|---|---|---|
Exostar
This company
|
17 | – | – | 201-500 | Herndon, United States | Azure, CI/CD, Copilot | United States, United Kingdom, India |
Mattermost
In common: Team Communication & Collaboration · Python, JavaScript, TypeScript · headquarters in United States |
10 | $50M | Venture round $50M2019 | 51-200 | Palo Alto, United States | JavaScript, React.js, TypeScript | United States, Canada, Japan |
Slack
In common: Team Communication & Collaboration · Python, JavaScript, Java · headquarters in United States |
19 | – | – | 1001-5000 | San Francisco, United States | AI Agents, Agentforce, Python | United States, Australia |
Arctiq
In common: Cybersecurity · Python, JavaScript, Java · headquarters in United States |
23 | – | – | 201-500 | Blue Bell, United States | Azure, Python, AWS | United States, Canada |
Security Risk Advisors
In common: Cybersecurity · Python, JavaScript, Java · headquarters in United States |
6 | – | – | 201-500 | Philadelphia, United States | Azure, AWS, Python | United States, Ireland |
Onit
In common: Cybersecurity · Python, JavaScript, Java · headquarters in United States |
27 | – | – | 201-500 | Houston, United States | AWS, SQL, CI/CD | India, United States |
Claroty
In common: Cybersecurity · Python, JavaScript, Java · headquarters in United States |
30 | – | – | 201-500 | New York, United States | TCP/IP, Python, DHCP | United States, Israel, United Kingdom +5 more |
1Kosmos
In common: Cybersecurity · Python, JavaScript, Java · headquarters in United States |
17 | $72M | Series B $57M2025 | 201-500 | Somerset, United States | AWS, Azure, JavaScript | United States |
JumpCloud
In common: Cybersecurity · Python, JavaScript, Java · headquarters in United States |
34 | $342.5M | Convertible Note $36k2022 | 201-500 | Louisville, United States | AWS, Python, CI/CD | India, Mexico, United States +2 more |
Valiant Solutions
In common: Cybersecurity · Python, JavaScript, TypeScript · headquarters in United States |
41 | – | – | 201-500 | Washington, United States | CMMC, Linux, Windows | United States |
Seekr
In common: Cybersecurity · Python, JavaScript, TypeScript · headquarters in United States |
24 | $21.6M | Venture round $17.3M2025 | 201-500 | Reston, United States | Python, Kubernetes, AWS | United States |
How the list is made
The list comes from Alion's similar-companies engine, the same one AI agents query through the Alion MCP server. A company ranks higher when it shares more of Exostar's industry segments and is less spread over others, when its job postings name the same technologies, when it is headquartered in the same country and when its size is close. The list is rebuilt every week.
How to cite this page
These figures are published under a free licence. You may reuse them, including commercially, as long as you credit Alion and link back to this page.
Alion, "Exostar competitors and alternatives: 10 similar companies compared on hiring and funding", as of Nov 15, 2026. https://alion.io/company/exostar/competitors