Invest In Your Engineering Career
Master system design with our affordable token-based system
Free TierNo Credit Card
Perfect for beginners exploring system design
- Few challenges access
- 3 prompts per hour to chat with our Context-aware AI to discuss your system design
- 5 free submissions per day
Compare Plans In Detail
| Features | Free | Pro |
|---|---|---|
| Available Challenges | Limited access | All Challenges |
| Daily Submissions | 5/day | Unlimited (token-based) |
| Context-Aware AI Chat | Limited to 3 prompts per hour | |
| Early Access to New Features |
Flexible Pricing
Pay only for the tokens you use
AI-Powered
Get detailed feedback on your designs
Learn Effectively
Practice with real-world system design challenges
How Our Token System Works
Simple Pay-As-You-Go
Our platform uses tokens to process your designs through our AI system. Token consumption depends on:
- Challenge complexity - more advanced challenges use more tokens
- Solution size - comprehensive solutions need more processing
- AI feedback detail - more in-depth feedback uses more tokens
Designed With Engineers In Mind
Our token system is built for software engineers who value flexibility and efficiency:
- No subscriptions - avoid recurring charges you might forget
- Tokens never expire - learn at your own pace
- Volume discounts - save more when you buy in bulk
Understanding Token Usage
What Are Tokens?
Tokens are the basic units of text processed by our AI system. Each word typically consists of 1-3 tokens, depending on its length. When you submit a system design challenge for review, we process both your solution and the challenge complexity to provide personalized feedback.
Factors Affecting Token Usage:
- Solution Length: Longer, more detailed solutions require more tokens to process
- Challenge Type: Different challenges have varying complexity levels
- Feedback Detail: More comprehensive feedback requires additional processing
Approximate Token Usage:
- Small challenge: ~5-15 tokens (~$0.03)
- Medium challenge: ~15-30 tokens (~$0.08)
- Complex challenge: ~30-50+ tokens (~$0.15-0.25)
The token system is designed to be fair and transparent. You'll always see how many tokens remain in your account, and you'll only be charged for the tokens you actually use when processing your challenges.
Frequently Asked Questions
Do tokens expire?
No, tokens never expire. Once purchased, they remain in your account until used. Learn at your own pace without the pressure of time limits.
Can I try before buying tokens?
Absolutely! Our free tier includes 3 challenges and limited daily submissions, letting you experience the platform before purchasing.
Are there volume discounts?
Yes! The more tokens you purchase, the better the value. Check our Tokens page for bulk pricing options.
How do I purchase tokens?
Simply navigate to the Tokens page, select the package you want, and complete the secure checkout process. Tokens are instantly added to your account for immediate use.