The short answer: if you're using a hosted arbitrage agent like Arbitrage Agent, no — you don't need a VPS. The agent runs in the cloud, connects to Polymarket and Kalshi from co-located infrastructure, and alerts you the moment a spread opens — without any setup on your end. Automated execution is in final testing.
If you're running your own script or open-source bot, then yes — latency and uptime matter, and a VPS will outperform a home internet connection on most time-sensitive arbitrage windows. But before renting a server, it's worth understanding exactly what you're optimising for and whether it's really the right constraint to solve.
What a VPS is and why traders use it
A VPS (Virtual Private Server) is a rented server running continuously in a data centre. For traders, the appeal is threefold: uptime (your strategy runs 24/7 even when your laptop is off), consistent low-latency internet (data centres have fast, stable fibre connections), and proximity to exchange servers (physical distance affects round-trip latency).
In traditional high-frequency trading, co-location — renting rack space in the same building as an exchange's matching engine — shaves microseconds off execution time. That level of precision matters when algorithms compete for the same order within nanoseconds. Prediction markets operate on a very different timescale.
Why execution speed matters — and how much
Prediction market arbitrage windows close because other arbitrageurs identify the same opportunity and trade it away. On active markets, a typical window lasts 30–200 seconds. That's orders of magnitude slower than equity or crypto arbitrage.
What this means: the difference between 100ms and 400ms execution speed is rarely the deciding factor in whether you capture a particular opportunity. A poorly built bot with unreliable event matching that executes in 80ms will miss far more opportunities than a well-built agent executing in 400ms — because it's taking positions on mismatched events, not true arbitrage.
What actually determines whether you capture opportunities:
- Event matching accuracy: Is the system correctly identifying the same event on both platforms, despite different titles and wording?
- WebSocket connectivity: Is your bot subscribed to real-time order book feeds, or polling REST APIs on a delay?
- Uptime: Is the bot running 24/7? Missing an hour during a breaking news event can mean missing the best opportunities of the month.
- Fee modelling: Does the system calculate net edge after both platforms' fees before deciding to trade?
The case for running your own VPS
If you've built your own arbitrage bot from scratch, a VPS solves two real problems:
Uptime. A home computer that sleeps, restarts, or loses internet for an hour is one that misses opportunities. A VPS runs continuously. For a strategy that depends on catching events as they emerge — elections, Fed decisions, breaking geopolitical news — continuous coverage is genuinely important.
Connection reliability. Home internet connections have higher jitter and more packet loss than data centre connections. For WebSocket feeds where you're processing real-time order book updates, a cleaner connection reduces the chance of a dropped feed and a stale price that looks like an opportunity but isn't.
A typical entry-level VPS for arbitrage — 2 vCPUs, 4GB RAM, located in a US data centre — costs $10–$30/month depending on provider. That's reasonable overhead if you're already running a custom bot that handles the hard parts correctly.
What a VPS won't fix
Providers who market VPS specifically to prediction market traders often lead with latency numbers — "5ms to Kalshi's servers" and similar claims. This framing is borrowed from HFT marketing and is largely irrelevant to prediction market arbitrage.
A 30-second arbitrage window doesn't care whether you execute in 50ms or 400ms. What it cares about is whether you identified the window in time, whether both legs filled correctly, and whether the edge calculation accounted for fees. None of those problems are solved by lower latency — they require better software.
More importantly: a VPS won't fix bad event matching. If your bot misidentifies two different events as the same — a common failure mode in DIY arbitrage scripts — it places directional bets that look like arbitrage until resolution day. A faster VPS means it places those bad bets faster.
The hosted alternative: no VPS required
Arbitrage Agent is a fully managed, hosted service. You don't set up any servers, configure any connections, or worry about uptime. The agent monitors thousands of matched market pairs across Polymarket and Kalshi continuously, alerts you instantly with both legs ready to place when a profitable spread is confirmed, and uses AI-based event matching to ensure the two sides are actually the same event.
Arbitrage Agent's plans — Starter at $29/month, Operator at $99/month — include the execution infrastructure, WebSocket feed management, and event matching. The VPS question is answered by default: it runs in the cloud, you connect your API keys, and it trades. Setup takes about 30 minutes total.
For most people running arbitrage on Polymarket and Kalshi, this is a significantly better trade-off than spending time on VPS setup and bot maintenance. A VPS rented for $20/month still requires you to build and maintain the bot — which is the genuinely hard part.
When a self-hosted VPS does make sense
There are real scenarios where self-hosting is the right call:
- You're a developer who wants full control over execution logic, event matching algorithms, and position management.
- You're running a non-standard strategy — market making, multi-leg positions, or liquidity provision — that a general-purpose agent doesn't support.
- You have compliance or jurisdiction requirements that dictate where your trading infrastructure runs.
- You're scaling a strategy that requires highly customised execution logic at volumes beyond what managed services accommodate.
For everyone else — including most retail traders getting started with prediction market arbitrage — the hosted approach avoids a class of operational problems that a VPS doesn't actually solve.
The right question to ask
Instead of "do I need a VPS?", ask: "what is the actual bottleneck in my strategy?" In most cases:
- If you're not capturing enough opportunities, the bottleneck is event matching quality or opportunity frequency — not server location.
- If you're losing money on trades that look like arbitrage, the bottleneck is event mismatch or fee miscalculation — not latency.
- If your bot misses overnight opportunities, the bottleneck is uptime — which a VPS solves, but so does any hosted service.
Execution speed matters at the margin. But in prediction market arbitrage, the margin where it matters is much narrower than VPS marketing suggests. The wins come from accurate matching, continuous coverage, and disciplined fee modelling — not from milliseconds. Join the Arbitrage Agent waitlist and start capturing spreads of 1.5–4% across thousands of live market pairs, without setting up a single server.