Bolt.new
In-browser full-stack AI development environment running Node.js and dev servers in WebContainers.
Overview & Analysis
Bolt.new is StackBlitz's AI-powered web development platform. Utilizing WebAssembly WebContainers, Bolt runs entire Node.js development servers, npm installations, and build tools directly inside your web browser. Prompt the AI to build or refactor an app, and watch it execute terminal commands and compile code in real time.
Pricing Model: Free tier with daily tokens; Pro at $20/month with 10M tokens; Pro 50 at $50/month with 26M tokens.
Free Tier Details: Free daily token allowance for testing and prototyping.
Technical Specs & Models
Key Capabilities & Features
Specialized engineering mechanisms implemented in Bolt.new.
Browser-Native WebContainer Runtime
Executes npm packages, Node servers, and compilers in-browser with zero remote cloud server latency.
Full-Repo Autonomous Edits
Creates, updates, and deletes multi-file project directories with live visual diff inspect.
One-Click Netlify / Supabase Deploy
Deploys functioning live production apps directly to Netlify hosting with connected database instances.
Open Source Core
The core prompt and orchestrator architecture is open-sourced for local and self-hosted deployments.
Pros & Cons Evaluation
Forensic analysis of developer experience, cost efficiency, and trade-offs.
- In-browser runtime means zero server spin-up latency and instant preview feedback
- Can install any standard npm package and run real development servers
- Open source community edition allows self-hosting with custom LLM endpoints
- Direct integration with Netlify and GitHub
- Heavy repositories can push against browser memory limits
- Token consumption can be rapid during broad multi-file generation runs
Pricing Plans & Tiers
Subscription plans, credit quotas, and commercial deployment options.
Free
For exploring and prototyping
- Daily token quota
- In-browser WebContainer execution
- One-click deployment
- Community support
Pro
For professional builders and engineers
- 10 Million monthly tokens
- Higher concurrency
- Private project sharing
- Custom model selection
- Priority customer support
Verified Benchmark Evaluations
Standardized evaluation scores recorded on SWE-bench and synthetic code harnesses.
| Benchmark Harness | Score / Accuracy | Evaluation Metric | Verification Status | Evaluation Notes |
|---|---|---|---|---|
| DeepSWE v1.1 | 64.0% | App Synthesis | Verified | Standard benchmark instance run. |
| SWE-Atlas | 72.8% | Multi-File Generation | Verified | Standard benchmark instance run. |
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