Free to start · No hard cutoffs · No credit card
The free Websim alternative
Websim — prompt-to-site sandbox. It runs Freemium, about $0/yr per seat. Unchained Code does the same job for $0.
Websim
$0/yr
- Seat fee & usage meters
- Message / session caps
- Cooldowns after heavy use
Unchained Code
$0/yr
- Unlimited chat, no card
- No hard cutoffs, no cooldowns
- 10 free credits a day
Why people switch from Websim
A sandbox that scales to real, deployable apps.
Unchained runs on open, OpenAI-compatible models (DeepSeek, Qwen, GLM, Kimi, MiniMax) that cost roughly 10× less per token than frontier models. That gap is passed straight to you: the free tier is the product: free to start, no lockouts.