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Server Sloth
ServerSloth — A visual playground for distributed systems.
ServerSloth is an interactive, mathematically driven system design simulator that allows developers and students to visually build distributed architectures, simulate real-world traffic patterns, and understand how infrastructure behaves under different workloads.
I used to think my systems were unbreakable. Then one broke in production.
For a long time I designed systems the way most of us do: draw boxes, connect arrows, add a load balancer, add a cache, add a replica. On the whiteboard, it looked bulletproof.
Then a real spike hit. One slow database query held its connection a little too long. The pool filled up, requests queued behind it, timeouts piled on, and the whole service went down in minutes. Nothing was wrong with any single box. The design couldn't take the load I had never actually tested.
That incident taught me that system design isn't about drawing the right diagram. It's about answering harder questions:
→ How much traffic can this actually handle? → What breaks first, and why? → What happens when a cache is flushed, a database dies, or a whole zone goes down?
You can't answer those by staring at a diagram, and most of us can't afford to load-test real infrastructure just to learn.
So I built the tool I wished I'd had: ServerSloth, a free system design simulator that runs in your browser.
• Build with 212+ real components: EC2, EKS, Aurora, Redis, Kafka, Lambda and more • Send up to millions of simulated users through your design • Break things on purpose: kill nodes, add latency, flush caches, fail a zone • See exactly what failed, with the real error message and the numbers behind it
I'd love for you to try it, break something, and tell me what you think in the comments. Honest reviews, missing components, confusing bits, feature ideas: all of it helps.
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About Server Sloth on Product Hunt
“ServerSloth — A visual playground for distributed systems.”
Server Sloth was submitted on Product Hunt and earned 0 upvotes and 1 comments, placing #290 on the daily leaderboard. ServerSloth is an interactive, mathematically driven system design simulator that allows developers and students to visually build distributed architectures, simulate real-world traffic patterns, and understand how infrastructure behaves under different workloads.
Server Sloth was featured in Design Tools (263.9k followers) and Developer Tools (522.7k followers) on Product Hunt. Together, these topics include over 139.9k products, making this a competitive space to launch in.
Who hunted Server Sloth?
Server Sloth was hunted by Arpit Sarang. A “hunter” on Product Hunt is the community member who submits a product to the platform — uploading the images, the link, and tagging the makers behind it. Hunters typically write the first comment explaining why a product is worth attention, and their followers are notified the moment they post. Around 79% of featured launches on Product Hunt are self-hunted by their makers, but a well-known hunter still acts as a signal of quality to the rest of the community. See the full all-time top hunters leaderboard to discover who is shaping the Product Hunt ecosystem.
Want to see how Server Sloth stacked up against nearby launches in real time? Check out the live launch dashboard for upvote speed charts, proximity comparisons, and more analytics.
Arpit Sarang
I used to think my systems were unbreakable. Then one broke in production.
For a long time I designed systems the way most of us do: draw boxes, connect arrows, add a load balancer, add a cache, add a replica. On the whiteboard, it looked bulletproof.
Then a real spike hit. One slow database query held its connection a little too long. The pool filled up, requests queued behind it, timeouts piled on, and the whole service went down in minutes. Nothing was wrong with any single box. The design couldn't take the load I had never actually tested.
That incident taught me that system design isn't about drawing the right diagram. It's about answering harder questions:
→ How much traffic can this actually handle?
→ What breaks first, and why?
→ What happens when a cache is flushed, a database dies, or a whole zone goes down?
You can't answer those by staring at a diagram, and most of us can't afford to load-test real infrastructure just to learn.
So I built the tool I wished I'd had: ServerSloth, a free system design simulator that runs in your browser.
• Build with 212+ real components: EC2, EKS, Aurora, Redis, Kafka, Lambda and more
• Send up to millions of simulated users through your design
• Break things on purpose: kill nodes, add latency, flush caches, fail a zone
• See exactly what failed, with the real error message and the numbers behind it
No sign-up needed. It's free for everyone.
👉 serversloth.ferrixlabs.in
I'd love for you to try it, break something, and tell me what you think in the comments. Honest reviews, missing components, confusing bits, feature ideas: all of it helps.