Cyrex Swarm™Simulate millions of concurrent users.
The industry-standard, fully headless load testing platform built to simulate real player behavior across gaming, blockchain, and high-concurrency enterprise systems.
No-commitment consultation
Proposal in 5 days
Trusted by 150+ studios
Trusted by Industry Leaders
What is Cyrex Swarm?
Headless concurrency testing for multiplayer backends. We don't just "ping" your servers. We replicate the entire ecosystem of your game or platform.
Headless Architecture
No rendered game clients. No hardware bottlenecks. Just pure network-level concurrency simulation for accurate infrastructure testing.
Real Player Journeys
Bots execute complete user flows including authentication, matchmaking, gameplay loops, store purchases, and Web3 transactions.
Scales to Millions of CCU
Cloud-deployable and horizontally scalable architecture. Test anything from 10K users for feature validation to millions for peak event modeling.
Protocol-Level Integration
Direct integration with Unreal Engine, Unity, Photon, custom backends, TCP/UDP protocols, and proprietary networking stacks.
Swarm doesn't simulate "traffic." It simulates players and users.
The Backbone of Every Load Test
Swarm powers all Cyrex load testing engagements - from stress testing to spike testing
Swarm is the proprietary technology behind every Cyrex load testing engagement - from baseline validation to peak event modeling.
Why Traditional Load Testing Fails for Games
Generic tools can't replicate multiplayer game traffic at scale
UI Automation Tools Are Too Heavy
Tools like Selenium, Playwright, or Unity Test Framework spin up full game clients. This introduces rendering overhead, memory bloat, and artificial concurrency caps. You're not testing your backend — you're testing how many clients your test rig can render.
HTTP Load Tools Don't Understand Game Networking
Generic HTTP flood tools (JMeter, Locust, K6) don't integrate with UDP-based game protocols, stateful sessions, or real-time multiplayer traffic. They can't replicate matchmaking, lobby systems, or client-authoritative flows.
Generic Traffic Doesn't Expose Real Bottlenecks
Empty traffic doesn't replicate how real users behave. Authentication, matchmaking, gameplay state synchronization, inventory updates — these are the actions that break backends under load. You need to simulate actual player journeys.
Launch Without Guesswork
Studios that skip load testing gamble with infrastructure stability.
Untested backends fail at scale
Studios that skip load testing gamble with infrastructure stability. Pre-launch bottlenecks go undetected. Post-launch, those bottlenecks become outages.
Authentication queues break, matchmaking times out, and game states desync. When pre-launch bottlenecks remain hidden, they inevitably manifest as production failures that crash your service and frustrate players.
Downtime is permanent reputation damage
Launch windows are final; you cannot re-launch. In the modern live-service era, negative community sentiment spreads significantly faster than your engineering team can deploy fixes.
Swarm validates infrastructure before players arrive
Swarm validates your infrastructure before the first player arrives. We turn performance testing from a high-stakes gamble into a structured, predictable, and controllable part of your release cycle.
Your backend will fail at scale. Test it before your players and users do.
Load Testing Case Studies
Real-world concurrency testing for AAA and Web3 games
What Clients Say
Cyrex is clearly the market leader. They go beyond simple testing to provide full player-representative load testing that gives us 10/10 confidence for launch.
Tencent
A true partnership mentality. Their experts bring deep technical expertise and a structured, methodical approach to securing our infrastructure.
Amazon Games
Cyrex is clearly the market leader. They go beyond simple testing to provide full player-representative load testing that gives us 10/10 confidence for launch.
Tencent
A true partnership mentality. Their experts bring deep technical expertise and a structured, methodical approach to securing our infrastructure.
Amazon Games
Productive and insightful. Cyrex helped us uncover potential bottlenecks in Dying Light: The Beast before release, ensuring a smoother player experience.
Techland
Market leaders in security. Their detailed reports and suggested actions gave us the insight needed to ensure our games were stable from day one.
Sumo Digital
Productive and insightful. Cyrex helped us uncover potential bottlenecks in Dying Light: The Beast before release, ensuring a smoother player experience.
Techland
Crucial expertise for the launch of Dune: Awakening. They were highly responsive and instrumental in resolving security and performance issues.
Funcom
Market leaders in security. Their detailed reports and suggested actions gave us the insight needed to ensure our games were stable from day one.
Sumo Digital
Crucial expertise for the launch of Dune: Awakening. They were highly responsive and instrumental in resolving security and performance issues.
Funcom
A key partner in scaling our multiplayer capabilities. Cyrex delivers quality, flexibility, and results that greatly benefit our live service games.
Avalanche Studios
A key partner in scaling our multiplayer capabilities. Cyrex delivers quality, flexibility, and results that greatly benefit our live service games.
Avalanche Studios
Cyrex earned our trust through deep domain knowledge and high-quality deliverables. They are the experts for securing complex software and platforms.
Immutable
Cyrex earned our trust through deep domain knowledge and high-quality deliverables. They are the experts for securing complex software and platforms.
Immutable
In the regulated iGaming space, trust is everything. Cyrex delivered on every promise with great flexibility and professional expertise.
Gamio GG / Hogamba
In the regulated iGaming space, trust is everything. Cyrex delivered on every promise with great flexibility and professional expertise.
Gamio GG / Hogamba
Invaluable for our blockchain products. Their thorough investigations ensure a safer environment for our users and players.
Project Seed
Extremely knowledgeable and fast to respond. Cyrex adapts quickly to our needs as we grow, making them an absolute pleasure to work with.
Faraway
Invaluable for our blockchain products. Their thorough investigations ensure a safer environment for our users and players.
Project Seed
Extremely knowledgeable and fast to respond. Cyrex adapts quickly to our needs as we grow, making them an absolute pleasure to work with.
Faraway
Consistently impressed by the quality of their services. As specialized pure players, they demonstrate exceptional expertise in security.
Belgium National Lotto
Consistently impressed by the quality of their services. As specialized pure players, they demonstrate exceptional expertise in security.
Belgium National Lotto
Cyrex helps us comply with the highest security standards required by Fortune 500 companies. Their knowledge and communication are top-tier.
Cortical.io
Cyrex helps us comply with the highest security standards required by Fortune 500 companies. Their knowledge and communication are top-tier.
Cortical.io
Professional, efficient, and always willing to go the extra mile. They respected every deadline despite the complexity of the task.
Merkator
Professional, efficient, and always willing to go the extra mile. They respected every deadline despite the complexity of the task.
Merkator
Thanks to their thorough analysis of our network infrastructure, we were able to identify and solve critical security risks effectively.
Diaz Sunprotection
Thanks to their thorough analysis of our network infrastructure, we were able to identify and solve critical security risks effectively.
Diaz Sunprotection
Professional and enjoyable. Their team delivered detailed, thorough results with minimal effort required on our part.
Stunlock Studios
Fast, precise, and easy to work with. They helped us assess our product's cybersecurity with total efficiency.
Enersee
Professional and enjoyable. Their team delivered detailed, thorough results with minimal effort required on our part.
Stunlock Studios
Fast, precise, and easy to work with. They helped us assess our product's cybersecurity with total efficiency.
Enersee
A smooth collaboration from start to finish. The team provided a timely, in-depth report with fast and transparent communication.
Cheqroom
A smooth collaboration from start to finish. The team provided a timely, in-depth report with fast and transparent communication.
Cheqroom
Cyrex made penetration testing a breeze. Their insights are spot-on and their understanding of the gaming industry is exceptional.
AccelByte
Cyrex made penetration testing a breeze. Their insights are spot-on and their understanding of the gaming industry is exceptional.
AccelByte
Cyrex is clearly the market leader. They go beyond simple testing to provide full player-representative load testing that gives us 10/10 confidence for launch.
Tencent
A true partnership mentality. Their experts bring deep technical expertise and a structured, methodical approach to securing our infrastructure.
Amazon Games
Cyrex is clearly the market leader. They go beyond simple testing to provide full player-representative load testing that gives us 10/10 confidence for launch.
Tencent
A true partnership mentality. Their experts bring deep technical expertise and a structured, methodical approach to securing our infrastructure.
Amazon Games
Productive and insightful. Cyrex helped us uncover potential bottlenecks in Dying Light: The Beast before release, ensuring a smoother player experience.
Techland
Market leaders in security. Their detailed reports and suggested actions gave us the insight needed to ensure our games were stable from day one.
Sumo Digital
Productive and insightful. Cyrex helped us uncover potential bottlenecks in Dying Light: The Beast before release, ensuring a smoother player experience.
Techland
Crucial expertise for the launch of Dune: Awakening. They were highly responsive and instrumental in resolving security and performance issues.
Funcom
Market leaders in security. Their detailed reports and suggested actions gave us the insight needed to ensure our games were stable from day one.
Sumo Digital
Crucial expertise for the launch of Dune: Awakening. They were highly responsive and instrumental in resolving security and performance issues.
Funcom
A key partner in scaling our multiplayer capabilities. Cyrex delivers quality, flexibility, and results that greatly benefit our live service games.
Avalanche Studios
A key partner in scaling our multiplayer capabilities. Cyrex delivers quality, flexibility, and results that greatly benefit our live service games.
Avalanche Studios
Cyrex earned our trust through deep domain knowledge and high-quality deliverables. They are the experts for securing complex software and platforms.
Immutable
Cyrex earned our trust through deep domain knowledge and high-quality deliverables. They are the experts for securing complex software and platforms.
Immutable
In the regulated iGaming space, trust is everything. Cyrex delivered on every promise with great flexibility and professional expertise.
Gamio GG / Hogamba
In the regulated iGaming space, trust is everything. Cyrex delivered on every promise with great flexibility and professional expertise.
Gamio GG / Hogamba
Invaluable for our blockchain products. Their thorough investigations ensure a safer environment for our users and players.
Project Seed
Extremely knowledgeable and fast to respond. Cyrex adapts quickly to our needs as we grow, making them an absolute pleasure to work with.
Faraway
Invaluable for our blockchain products. Their thorough investigations ensure a safer environment for our users and players.
Project Seed
Extremely knowledgeable and fast to respond. Cyrex adapts quickly to our needs as we grow, making them an absolute pleasure to work with.
Faraway
Consistently impressed by the quality of their services. As specialized pure players, they demonstrate exceptional expertise in security.
Belgium National Lotto
Consistently impressed by the quality of their services. As specialized pure players, they demonstrate exceptional expertise in security.
Belgium National Lotto
Cyrex helps us comply with the highest security standards required by Fortune 500 companies. Their knowledge and communication are top-tier.
Cortical.io
Cyrex helps us comply with the highest security standards required by Fortune 500 companies. Their knowledge and communication are top-tier.
Cortical.io
Professional, efficient, and always willing to go the extra mile. They respected every deadline despite the complexity of the task.
Merkator
Professional, efficient, and always willing to go the extra mile. They respected every deadline despite the complexity of the task.
Merkator
Thanks to their thorough analysis of our network infrastructure, we were able to identify and solve critical security risks effectively.
Diaz Sunprotection
Thanks to their thorough analysis of our network infrastructure, we were able to identify and solve critical security risks effectively.
Diaz Sunprotection
Professional and enjoyable. Their team delivered detailed, thorough results with minimal effort required on our part.
Stunlock Studios
Fast, precise, and easy to work with. They helped us assess our product's cybersecurity with total efficiency.
Enersee
Professional and enjoyable. Their team delivered detailed, thorough results with minimal effort required on our part.
Stunlock Studios
Fast, precise, and easy to work with. They helped us assess our product's cybersecurity with total efficiency.
Enersee
A smooth collaboration from start to finish. The team provided a timely, in-depth report with fast and transparent communication.
Cheqroom
A smooth collaboration from start to finish. The team provided a timely, in-depth report with fast and transparent communication.
Cheqroom
Cyrex made penetration testing a breeze. Their insights are spot-on and their understanding of the gaming industry is exceptional.
AccelByte
Cyrex made penetration testing a breeze. Their insights are spot-on and their understanding of the gaming industry is exceptional.
AccelByte
Cyrex is clearly the market leader. They go beyond simple testing to provide full player-representative load testing that gives us 10/10 confidence for launch.
Tencent
A true partnership mentality. Their experts bring deep technical expertise and a structured, methodical approach to securing our infrastructure.
Amazon Games
Cyrex is clearly the market leader. They go beyond simple testing to provide full player-representative load testing that gives us 10/10 confidence for launch.
Tencent
A true partnership mentality. Their experts bring deep technical expertise and a structured, methodical approach to securing our infrastructure.
Amazon Games
Productive and insightful. Cyrex helped us uncover potential bottlenecks in Dying Light: The Beast before release, ensuring a smoother player experience.
Techland
Market leaders in security. Their detailed reports and suggested actions gave us the insight needed to ensure our games were stable from day one.
Sumo Digital
Productive and insightful. Cyrex helped us uncover potential bottlenecks in Dying Light: The Beast before release, ensuring a smoother player experience.
Techland
Crucial expertise for the launch of Dune: Awakening. They were highly responsive and instrumental in resolving security and performance issues.
Funcom
Market leaders in security. Their detailed reports and suggested actions gave us the insight needed to ensure our games were stable from day one.
Sumo Digital
Crucial expertise for the launch of Dune: Awakening. They were highly responsive and instrumental in resolving security and performance issues.
Funcom
A key partner in scaling our multiplayer capabilities. Cyrex delivers quality, flexibility, and results that greatly benefit our live service games.
Avalanche Studios
A key partner in scaling our multiplayer capabilities. Cyrex delivers quality, flexibility, and results that greatly benefit our live service games.
Avalanche Studios
Cyrex earned our trust through deep domain knowledge and high-quality deliverables. They are the experts for securing complex software and platforms.
Immutable
Cyrex earned our trust through deep domain knowledge and high-quality deliverables. They are the experts for securing complex software and platforms.
Immutable
In the regulated iGaming space, trust is everything. Cyrex delivered on every promise with great flexibility and professional expertise.
Gamio GG / Hogamba
In the regulated iGaming space, trust is everything. Cyrex delivered on every promise with great flexibility and professional expertise.
Gamio GG / Hogamba
Invaluable for our blockchain products. Their thorough investigations ensure a safer environment for our users and players.
Project Seed
Extremely knowledgeable and fast to respond. Cyrex adapts quickly to our needs as we grow, making them an absolute pleasure to work with.
Faraway
Invaluable for our blockchain products. Their thorough investigations ensure a safer environment for our users and players.
Project Seed
Extremely knowledgeable and fast to respond. Cyrex adapts quickly to our needs as we grow, making them an absolute pleasure to work with.
Faraway
Consistently impressed by the quality of their services. As specialized pure players, they demonstrate exceptional expertise in security.
Belgium National Lotto
Consistently impressed by the quality of their services. As specialized pure players, they demonstrate exceptional expertise in security.
Belgium National Lotto
Cyrex helps us comply with the highest security standards required by Fortune 500 companies. Their knowledge and communication are top-tier.
Cortical.io
Cyrex helps us comply with the highest security standards required by Fortune 500 companies. Their knowledge and communication are top-tier.
Cortical.io
Professional, efficient, and always willing to go the extra mile. They respected every deadline despite the complexity of the task.
Merkator
Professional, efficient, and always willing to go the extra mile. They respected every deadline despite the complexity of the task.
Merkator
Thanks to their thorough analysis of our network infrastructure, we were able to identify and solve critical security risks effectively.
Diaz Sunprotection
Thanks to their thorough analysis of our network infrastructure, we were able to identify and solve critical security risks effectively.
Diaz Sunprotection
Professional and enjoyable. Their team delivered detailed, thorough results with minimal effort required on our part.
Stunlock Studios
Fast, precise, and easy to work with. They helped us assess our product's cybersecurity with total efficiency.
Enersee
Professional and enjoyable. Their team delivered detailed, thorough results with minimal effort required on our part.
Stunlock Studios
Fast, precise, and easy to work with. They helped us assess our product's cybersecurity with total efficiency.
Enersee
A smooth collaboration from start to finish. The team provided a timely, in-depth report with fast and transparent communication.
Cheqroom
A smooth collaboration from start to finish. The team provided a timely, in-depth report with fast and transparent communication.
Cheqroom
Cyrex made penetration testing a breeze. Their insights are spot-on and their understanding of the gaming industry is exceptional.
AccelByte
Cyrex made penetration testing a breeze. Their insights are spot-on and their understanding of the gaming industry is exceptional.
AccelByte
Frequently Asked Questions
Test Infrastructure. Not Hope.
Swarm validates your backend before players do.
Simulate millions of concurrent connections with protocol-native traffic generation - no browser overhead, no guesswork. Know exactly how your infrastructure performs under real-world conditions before launch day.