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Multi-Venue Smart Order Router for Prediction Markets
A SaaS platform providing intelligent order routing across prediction market venues (Kalshi, Polymarket, etc.) that aggregates liquidity, manages partial fills, and executes fee-adjusted optimal routing. Targets algo traders currently building and maintaining fragile custom solutions.
Why this matters
You are an algorithmic trader executing sizeable orders on prediction markets. When you send a large order to a single venue, you eat through multiple price levels and get terrible average fills. You know the same contract trades on multiple platforms at different prices, but there is no commercial tool to intelligently split your order across venues to get the best blended price. You tried building your own router, but now you are drowning in partial-fill management — one side fills 200 contracts while the other side gets stranded. You also discovered that apparent price differences vanish once you account for each platform's different fee structure. You spend more time maintaining API integrations and fixing execution edge cases than you do finding trading edges.
- · Built for Algorithmic traders and quant developers actively trading on prediction markets who execute orders large enough to move prices on a single venue.
- · Most likely monetization: SaaS subscription with usage-based tiering.
The Pain · Narrative
You are an algorithmic trader executing sizeable orders on prediction markets. When you send a large order to a single venue, you eat through multiple price levels and get terrible average fills. You know the same contract trades on multiple platforms at different prices, but there is no commercial tool to intelligently split your order across venues to get the best blended price. You tried building your own router, but now you are drowning in partial-fill management — one side fills 200 contracts while the other side gets stranded. You also discovered that apparent price differences vanish once you account for each platform's different fee structure. You spend more time maintaining API integrations and fixing execution edge cases than you do finding trading edges.
Score Breakdown
Market Signal
Go-to-Market
Independent algorithmic traders running bots on prediction markets who execute orders of 500+ contracts and currently rely on single-venue execution or fragile custom routing code
~5,000-10,000 active algo traders currently on prediction market platforms, with rapid growth as the sector expands
Organic posts in algorithmic trading and prediction market communities, targeting discussions about execution quality and arbitrage
$99/month for standard tier, $299/month for professional tier with higher throughput
15 paying users within 30 days from community launches, with users reporting measurable per-contract savings
MVP Scope · 1–2 weeks
- Build Kalshi and Polymarket API connector abstractions with unified order book data model
- Implement basic cross-venue order splitting logic that optimizes for best blended price
- Create fee-adjusted pricing engine that accounts for each platform's take rate
- Build simple REST API endpoint accepting order requests and returning execution plan
- Set up basic logging and execution analytics to measure savings vs. single-venue
- Implement partial-fill detection and stranded-leg cancel-and-retry logic
- Add TWAP execution mode for slow-moving markets with configurable time windows
- Build a basic web dashboard showing execution history, fill rates, and savings metrics
- Add authentication, billing integration, and usage tracking for SaaS monetization
- Deploy to cloud infrastructure with WebSocket streaming for real-time order book updates
Differentiation
Why This Might Fail
Self-rebuttal — the most important trust signal
- 1Prediction market platforms may restrict or rate-limit API access for third-party routing tools, killing the core value proposition — Kalshi or Polymarket could view cross-venue routing as threatening their market share and cut off access.
- 2The total addressable market may be too small — prediction market algo trading is still a niche activity, and traders who are sophisticated enough to need smart routing may prefer to build their own solutions rather than trust a third party with their execution logic.
- 3Regulatory action against prediction markets (especially in the US) could shrink or eliminate the market entirely — Polymarket has already faced CFTC enforcement, and broader crackdowns would destroy the customer base overnight.
Evidence Summary
How AI synthesized this insight — no verbatim quotes
Approximately 5 commenters discussed execution challenges when routing orders across prediction market venues. Multiple users highlighted partial-fill stranding as a critical problem, with one describing how partial fills on one venue leave the remainder stranded on the other. Another user recommended fee-adjusted pricing checks, noting that apparent price advantages can evaporate once platform take rates are factored in. The original poster confirmed they built a custom router achieving 2.3 cents per contract savings, and multiple users requested expansion to additional platforms, indicating unmet demand for a managed multi-venue solution.
Action Plan
Validate this opportunity before writing code
Recommended Next Step
Build
Strong demand signals detected. Real pain, real willingness to pay — start building an MVP.
Landing Page Copy Kit
Ready-to-paste copy based on real Reddit community language — no editing required
Headline
Multi-Venue Smart Order Router for Prediction Markets
Sub-headline
A SaaS platform providing intelligent order routing across prediction market venues (Kalshi, Polymarket, etc.) that aggregates liquidity, manages partial fills, and executes fee-adjusted optimal routing. Targets algo traders currently building and maintaining fragile custom solutions.
Who It's For
For Algorithmic traders and quant developers actively trading on prediction markets who execute orders large enough to move prices on a single venue
Feature List
✓ Cross-venue liquidity aggregation with optimal order splitting ✓ Fee-adjusted real-time price comparison across platforms ✓ Partial-fill management with automatic cancel-and-retry for stranded legs ✓ TWAP execution engine supporting multiple venues simultaneously ✓ Execution analytics dashboard showing savings vs. single-venue execution
Where to Validate
Share your landing page in r/r/algotrading — that's exactly where these pain points were discovered.
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