# bolt.diy

Prompt-to-app you host. bolt.diy is MIT — Bolt.new, Lovable, and v0 without the hosted builder seat.

**Replaces:** Lovable / Bolt.new / v0

**Tier:** Medium

## Problem

Bolt.new, Lovable, and v0 are hosted prompt-to-app products. You wanted that loop with a model you bring. bolt.diy is MIT (stackblitz-labs/bolt.diy) — the community fork of Bolt.new that talks to any LLM you configure. This is not Lovable's every visual editor SKU, v0's Vercel deploy graph, or Bolt's hosted runtime. You still pay tokens. Appsmith/ToolJet stay internal tools on a database (/replace/retool).

## Stack

- [bolt.diy](https://stackblitz-labs.github.io/bolt.diy/) — MIT community Bolt.new: prompt, run, and edit apps with your LLM
- [LiteLLM](https://www.litellm.ai/) — OpenAI-compatible proxy the builder can call

## Estimated SaaS cost saved

| You stop paying | Typical / year | Self-host instead |
|---|---:|---|
| Lovable / Bolt.new / v0 (small team) | $1,200 | bolt.diy + your models |

**About $1,200 / year** on a small team, before you count lock-in.

## Deploy on Railway

Placeholder: bolt.diy as a UI pointed at an OpenAI-compatible API (LiteLLM or a vendor). Persist config. No one-click template in this repo yet — Start on Railway. Internal tools stay on /stacks/baserow-appsmith.

[Start on Railway](https://c17.io/go/railway/bolt-diy?from=%2Fstacks%2Fbolt-diy.md)

[Baserow / Appsmith if this is an internal tool on a database, not prompt-to-app](https://c17.io/stacks/baserow-appsmith)

## AGENT_PROMPT

```
Replace Bolt.new, Lovable, or v0 with bolt.diy pointed at models you bring.

- Official docs, persist config, point at LiteLLM. Generate one small app you actually want. Do not claim Vercel v0 deploy graphs or Lovable's hosted visual OS.
- Internal tools on a grid stay on /stacks/baserow-appsmith. Write AGENT_PROMPT.md.
```

## FAQ

### Lovable, Bolt.new, or v0?

Same published stack. bolt.diy is the MIT builder you host. You bring the model. Hosted deploy graphs stay behind.

### Is this Appsmith?

No. Appsmith/ToolJet are internal tools on a database — /replace/retool. This page is prompt-to-app.

### Do I still pay tokens?

Yes, unless you run local weights. bolt.diy is the UI. It is not free inference.

Source: https://c17.io/stacks/bolt-diy