Bolt.new vs Cosine
A side-by-side comparison of capabilities, autonomy, integrations, and pricing to help you choose.
Short answer: choose Bolt.new if you want prompt, edit, and deploy full-stack web apps in the browser (Supervised agent, freemium); choose Cosine if you want agentic ai software engineer producing reviewable, controlled code (Supervised agent, subscription).
| Bolt.new | Cosine | |
|---|---|---|
| What it is | Prompt, edit, and deploy full-stack web apps in the browser | Agentic AI software engineer producing reviewable, controlled code |
| Type | agent | agent |
| Autonomy | Supervised agent | Supervised agent |
| Pricing | freemium · Free (1M tokens/mo); Pro from $25/mo | subscription · $19/mo (Starter) |
| Best for | consumers, developers, smb | developers, enterprise |
| Deployment | saas | saas, self-hosted |
| Modalities | text, code | text, code |
| Models | claude, model-agnostic | proprietary |
| Protocols | rest-api | rest-api |
| Integrations | Netlify, Supabase, GitHub, Expo | GitHub, Jira, Linear, Slack, VS Code |
| Capabilities | 3 documented | 4 documented |
Bolt.new
- +Full dev environment runs in the browser via WebContainers, with the AI controlling filesystem, terminal, and server
- +Generates true full-stack apps (not just UI) and can deploy via Bolt Cloud
- +No local setup; fast for prototyping and iterating by chatting
- -Token-based usage cost can rise quickly on complex or long-running builds
- -Output needs human review and iteration; it is not a hands-off autonomous engineer
Cosine
- +Built for review and control: a diff-plus-evidence handoff fits real merge workflows
- +Proprietary, purpose-trained model rather than a thin wrapper
- +Multi-surface (CLI, desktop, cloud) with async parallel execution
- -"Fully agentic" branding oversells reality; output needs human review and merge
- -Headline SWE-bench scores are company-reported and never appeared on the official leaderboard
Which should you choose?
Bolt.new is prompt, edit, and deploy full-stack web apps in the browser, best for consumers, developers, smb. Cosine is agentic ai software engineer producing reviewable, controlled code, best for developers, enterprise. The right choice depends on the autonomy level you want, your existing integrations, and your budget, all compared above.