20+ Best Alternatives to Second Front Systems in 2026
Game Warden delivers software to classified government environments fast
Looking for an alternative to Second Front Systems? Below are 20 AI startups working in the same space — ranked by our Neuron score so the most credible options come first. Each card shows what makes the tool a viable substitute, pricing signals, and funding stage.
- 1View alternative →
Castelion
$1.2BMass-producing affordable hypersonic weapons for defense
Why it's similar: Shares categories with Second Front Systems — Defense AI.
💵 Enterprise · Contact sales
- 2View alternative →
Anduril Drones
$7.5BAutonomous defense drones and counter-UAS systems.
Why it's similar: Shares categories with Second Front Systems — Defense AI.
💵 Enterprise · Contact sales
- 3View alternative →
Saronic Technologies
$2.6BRedefining maritime superiority with the most advanced and capable autonomous vessels in the maritime domain.
Why it's similar: Shares categories with Second Front Systems — Defense AI.
💵 Enterprise · Contact sales
- 4View alternative →
CHAOS Industries
$1BDistributed radar and sensing systems for counter-drone and air domain awareness
Why it's similar: Shares categories with Second Front Systems — Defense AI.
💵 Enterprise · Contact sales
- 5View alternative →
Armadin
$189.9MAutonomous AI red-teaming for the era of AI hyperattacks
Why it's similar: Shares categories with Second Front Systems — AI for Cyber Defense.
💵 Enterprise · Contact sales
- 6View alternative →
Abnormal Security
$760MProtect humans with behavioral AI against phishing, social engineering, and account takeovers.
Why it's similar: Shares categories with Second Front Systems — AI for Cyber Defense.
💵 Enterprise · Contact sales
- 7View alternative →
Blue Water Autonomy
$64MBuilding the world's most capable fully autonomous warships
Why it's similar: Shares categories with Second Front Systems — Defense AI.
💵 Enterprise · Contact sales
- 8View alternative →
Torq
$332MAgentic AI platform for the autonomous SOC
Why it's similar: Shares categories with Second Front Systems — AI for Cyber Defense.
💵 Enterprise · Contact sales
- 9View alternative →
HavocAI
$96MCollaborative maritime autonomy for fleets of uncrewed surface vessels
Why it's similar: Shares categories with Second Front Systems — Defense AI.
💵 Enterprise · Contact sales
- 10View alternative →
Skyryse
$600MAI-powered fly-by-wire system for any aircraft
Why it's similar: Shares categories with Second Front Systems — Defense AI.
💵 Enterprise · Contact sales
- 11View alternative →
Overland AI
$142MOff-road ground autonomy for military vehicles in GPS-denied terrain
Why it's similar: Shares categories with Second Front Systems — Defense AI.
💵 Enterprise · Contact sales
- 12View alternative →
Sentra
$105MCloud-native data security for the AI era
Why it's similar: Shares categories with Second Front Systems — AI for Cyber Defense.
💵 Enterprise · Contact sales
- 13View alternative →
Jazz
$61MAI-powered data loss prevention that understands intent, context and risk
Why it's similar: Shares categories with Second Front Systems — AI for Cyber Defense.
💵 Enterprise · Contact sales
- 14View alternative →
Exaforce
$200MAgentic SOC platform for real-time threat detection and response
Why it's similar: Shares categories with Second Front Systems — AI for Cyber Defense.
💵 Enterprise · Contact sales
- 15View alternative →
Oasis Security
$195MAgentic access management to secure AI agents and non-human identities
Why it's similar: Shares categories with Second Front Systems — AI for Cyber Defense.
💵 Enterprise · Contact sales
- 16View alternative →
Bold Security
$40MEdge-AI endpoint security that turns every device into an active agent
Why it's similar: Shares categories with Second Front Systems — AI for Cyber Defense.
💵 Enterprise · Contact sales
- 17View alternative →
Astranis
$1.2BThe world's only dedicated satellite networks providing flexible, resilient, high-speed communications for global customers.
Why it's similar: Shares categories with Second Front Systems — Defense AI.
💵 Enterprise · Contact sales
- 18View alternative →
Horizon3.ai
$178.5MAutonomous penetration testing with NodeZero, run continuously at production scale
Why it's similar: Shares categories with Second Front Systems — AI for Cyber Defense.
💵 Enterprise · Contact sales
- 19View alternative →
Tines
$146.2MThe intelligent workflow platform to securely scale AI and automation, integrating agents, teams, and tools with speed and control.
Why it's similar: Shares categories with Second Front Systems — AI for Cyber Defense.
💵 Enterprise · Contact sales
- 20View alternative →
Epirus
$550MHigh-power microwave systems that disable drone swarms in flight
Why it's similar: Shares categories with Second Front Systems — Defense AI.
💵 Enterprise · Contact sales
Frequently asked questions
What are the best alternatives to Second Front Systems?
The top-ranked alternatives to Second Front Systems on NeuronFeed are Castelion, Anduril Drones, Saronic Technologies, CHAOS Industries, Armadin. Rankings are based on our Neuron score, which weighs funding, momentum and editorial signal.
Is there a free alternative to Second Front Systems?
Yes — Tines offer a free plan. See the pricing column for each alternative above.
How is this list ranked?
We rank alternatives by shared categories with Second Front Systems, then by our proprietary Neuron score (0–100) which combines funding, team quality, momentum, and editorial input. The list refreshes every 30 days.
Second Front Systems vs Castelion — which is better?
It depends on use case. Castelion (Mass-producing affordable hypersonic weapons for defense) is the #1-ranked alternative. See the full side-by-side at /compare/second-front-systems-vs-castelion.
Explore more around Second Front Systems
Contextual paths to related AI startups, deals and rankings.