Pricing
Start free. Upgrade when your world demands more. All plans include access to the core Aether Engine.
Standard
For dedicated worldbuilders who need more room.
Premium
Advanced tools for deep worldbuilders and GMs.
Founder's
For those who want to shape the Engine itself.
Comparison
| Feature | Free | Standard | Premium | Founder's |
|---|---|---|---|---|
| Persistent worlds | 1 | 3 | 10 | Unlimited |
| Sessions per month | 5 | Unlimited | Unlimited | Unlimited |
| NPC memory | 30 days | Permanent | Permanent | Permanent |
| NPC relationship webs | ✦ | ✦ | ||
| Scheduled world events | ✦ | ✦ | ||
| World history export | ✦ | ✦ | ||
| All genres | ✦ | ✦ | ✦ | |
| Custom genre | ✦ | ✦ | ||
| Claude AI model | ✦ | |||
| Early feature access | ✦ | |||
| Founder badge + Discord role | ✦ | |||
| Lifetime rate lock | ✦ |
Lore
What is a "persistent world"?
A world that continues to exist and evolve even when you are not logged in. NPCs remember your actions, political events unfold on a schedule, and seasons change in real time.
Can I cancel anytime?
Yes. Cancel at any time from your settings. Your subscription remains active until the end of the billing period.
What happens to my worlds if I downgrade?
Your worlds are preserved but go into a paused state if you exceed your tier limit. They resume when you upgrade again.
Is there a free trial for paid plans?
The Free tier gives you full access to the core engine. Paid features can be tested during our beta period.
What AI models power the Engine?
The Aether Engine uses a multi-model AI system via OpenRouter — featuring Gemma, Mistral, Llama, Qwen, Claude, and GPT models. Higher tiers unlock more powerful models, with Claude available exclusively to Founders.