Desktop IDE · agents that ship

Plan it. Build it. Verify it. Ship it.

Hand off the work. Review the result. Catalyst is a real IDE with an agent that writes to disk, previews the app in-browser, and runs every cloud model through a five-layer quality pipeline — not a chat that only pretends to build.

Download for Windows View pricing

Private beta Prompt → files → live preview Anthropic + xAI

Catalyst IDE workbench with agent and model catalog

Quality layers 5

Router → Engineer → Verifier → Auditor → Corrector on every cloud run

Modes 3

Agent, Plan, and Ask — decide, ship, or understand

Proof 1

Build lands on disk. Preview at 127.0.0.1:4567

Agents turn ideas into code — and into apps.

Cursor made the agent feel native. Bolt made shipping a site feel instant. Catalyst is both: a professional desktop workbench and a builder that actually finishes the product.

Agent that writes for real

Terminal, MCP, streaming diffs, multi-file edits. Not a demo sandbox that evaporates when you close the tab.

Plan before you burn tokens

Clarify the build, approve the plan, then implement. Same quality pipeline as free-form agent runs.

Preview what shipped

In-app Browser serves production dist/ — you see the product, not a broken Vite default.

One accountable build loop

Plan, implementation, review, preview, and release evidence—kept together in the same workspace.

	Cursor	Bolt.new	Catalyst
Full desktop IDE	✓	—	✓
Agent in your repo	✓	Web project	✓
Prompt → live web app	Partial	✓	✓ on disk + preview
Multi-layer QC per run	—	—	5 layers
Anthropic + xAI managed	Multi-provider	Routed	✓ metered CBT
Local-first free IDE	Paid core	Cloud	Download free

Every model, five layers deep

A single model call is a draft. Catalyst forces Router → Engineer → Verifier → Auditor → Corrector so cloud builds are something you’d actually merge — not a hallucinated zip of half-finished files.

Managed cloud: Anthropic + xAI. Free trial locked to Haiku 4.5 + Grok 4.20 Reasoning. Pro unlocks the full catalog.

How the pipeline works →

RouterEngineerVerifierAuditorCorrector

Stay on the frontier

Best model for the task — with spend caps so cost stays honest.

Claude Haiku 4.5 Claude Sonnet 4.6 Claude Opus 4.7 Grok 4.20 Reasoning Grok 4.5 Grok Build

Trial = Haiku 4.5 + Grok 4.20 Reasoning only. Paid plans unlock the full managed catalog.

Premium quality. Transparent compute.

Like Cursor: a monthly pool of agent usage. Pro $40 · Pro+ $80 · Ultra $400. 24h free trial with a card on file.