Bolt vs Coasty: Features, Pricing & Which Is Better (2026)
A side-by-side comparison of Bolt and Coasty — features, pricing, and ideal use cases — to help you decide which AI tool fits your workflow.
Bolt
StackBlitz
In-browser AI-powered development agent to prompt, run, edit, and deploy full‑stack websites, apps and prototypes without local setup.
Key features
- Prompt-Driven Development: Use natural-language prompts to generate, modify, and extend full‑stack application code, accelerating iteration from idea to running prototype.
- In-Browser Runtime (WebContainers): Run backend and frontend code directly in the browser via StackBlitz WebContainers, eliminating local setup and ensuring generated projects execute immediately.
- Edit and Live-Preview: Interactive editing of generated code with immediate live previews so developers can refine UI, logic, and configuration in real time.
- One-Click Deployments: Deploy projects created in Bolt to run on StackBlitz infrastructure (or compatible StackBlitz runtimes) with minimal configuration.
- Token & Project Management: Built-in usage controls for AI tokens and project visibility, including paid subscription options to increase token allowances and enable private projects.
- Open-Source DIY Variant: bolt.diy lets users self-host or run an open-source version that permits selecting the LLM for each prompt for customization and privacy.
- Seamless StackBlitz Compatibility: Any project that runs on StackBlitz will run on Bolt.new, enabling reuse of StackBlitz templates, examples, and ecosystems.
- Prompt-driven generation of full-stack applications and prototypes
- In-browser runtime and editing powered by StackBlitz WebContainers (no local setup)
- Run, test, and iterate on generated code immediately in the browser
- Deploy full-stack applications from the browser
- Paid subscription option for additional AI tokens and private projects
- Open-source variant (bolt.diy) enabling selection of custom LLMs per prompt
- Seamless compatibility with projects that run on StackBlitz
Best for
- Rapid Prototyping: Quickly generate and iterate on web app prototypes by prompting Bolt to scaffold frontend and backend code and preview instant results in the browser.
- Full-Stack Development Without Setup: Build, test, and run full‑stack applications in environments where installing local toolchains is impractical (e.g., workshops, classrooms, demos).
- Demo and Portfolio Deployments: Create and deploy interactive demos or portfolio projects quickly for stakeholder reviews or user testing without managing servers.
- Custom LLM Workflows (bolt.diy): Teams that require specific LLMs or on‑premise models can use the open-source bolt.diy to route prompts to chosen models and preserve data control.
- Learning and Teaching: Instructors and learners can use Bolt to demonstrate full‑stack concepts, generate example code, and explore modifications live during lessons.
- Accelerating Feature Development: Developers can use Bolt to scaffold features, generate boilerplate, and then refine the generated code manually to speed up development cycles.
- Rapid prototyping of web apps and front-to-back demos directly in the browser
- Learning and teaching web development with immediate runnable examples
- Building and iterating on UI/UX prototypes without local environment setup
- Generating starting codebases or feature scaffolds using natural language prompts
- Creating private projects and increasing AI usage via paid subscription
Coasty
Coasty
Computer-use AI agent and API (85.60% OSWorld) that browses, clicks and types across real desktop apps to finish work end-to-end.
Key features
- Best-in-Class Computer Use: Ranked #1 on OSWorld at 85.60%, executing long-horizon tasks across real desktop applications.
- Predict API: `/v1/predict` accepts a screenshot and returns the next action as structured JSON at $0.05 per call.
- Always-On Virtual Machines: Persistent, always-on VMs let agents keep state between tasks and pick work up where they left off.
- Agent Swarms: Run multiple agents in parallel to fan out across steps or accounts, cutting wall-clock time on repetitive work.
- 1,000+ App Integrations: Ships with native integrations to common productivity apps like Gmail and Slack out of the box.
- Synthetic Trajectory Data: Delivers custom long-horizon multimodal training trajectories verified before delivery for enterprise buyers.
Best for
- Back-Office Automation: Insurance, accounting and freight teams delegate repetitive desktop work — data entry, form filling, portal ops — to agents.
- Autonomous Web Tasks: Consumers ask Coasty to book appointments, research options and complete purchases end-to-end.
- Developer Automation: Engineers embed the Predict API into their own harnesses to build custom agentic workflows.
- Healthcare Ops: Clinics use computer-use agents against legacy systems that lack modern APIs.
- Data Collection at Scale: Enterprises order synthetic multimodal trajectories tuned to their apps for model fine-tuning.