AI writes the code. We make the calls a CTO would — what to build, in what order, and what breaks when you grow. Equity-free, from day one.
Free · no signup · read-only. No repo yet? Describe your idea instead →
Three real systems Jaguar designs and reviews — 6 layers, 20+ components, replicas and all. Pick a use case, click a business workflow, and watch the data move through the system.
Drag to orbit · scroll to zoom · ×N = replicas that scale · red dashes = what's missing. Design your own in Studio → — or paste your GitHub repo there and see your actual system in 3D, your real workflows animated.
The loop a technical cofounder runs — before, during, and after your build.
From an idea, PRD, Figma — or just a URL — Jaguar architects the full system: services, data, stack, and compliance (HIPAA, PCI, SOC 2), every choice justified in plain English.
Upload your design or what your dev, agency, or AI tool built. Jaguar overlays ranked risks on the exact components affected — and shows the corrected design.
A phase-by-phase plan with paste-ready prompts for Lovable, Bolt, or Cursor — guardrails baked in. Clear enough for an intern. No CTO required.
The category isn't code generation — it's technical judgment.
| Capability | Vibe-coding (Lovable, Bolt, v0) | AI IDEs (Cursor, Copilot) | Human fractional CTO | Jaguar AI |
|---|---|---|---|---|
| Generates full architecture | Partial | ✕ | ✓ | ✓ Instant |
| Reviews existing code & design | ✕ | Line-level | ✓ | ✓ System-level |
| Justifies stack decisions | ✕ | ✕ | ✓ | ✓ |
| Industry compliance built in | ✕ | ✕ | Sometimes | ✓ |
| Available in minutes | ✓ | ✓ | ✕ | ✓ |
| Monthly cost | $20–100 | $20–40 | $4k–15k | free to try · from $299/mo |
Think about what a real CTO cofounder actually does between launches: decides what to build, reviews what got built, unblocks the team, and watches for drift. Jaguar does those four jobs — without the salary or the 10–50% equity a human cofounder costs.
Every new feature starts as a spec: Jaguar architects it, picks the stack, and writes the build plan — before a line of code exists.
Paste a Lovable/Bolt/v0 link, a screenshot, or a repo export — Jaguar reviews what your dev, agency, or AI actually shipped against the plan. GitHub auto-review on every PR is rolling out.
"Can we use Firebase for this?" "Is this quote fair?" "Why is it slow?" — plain-English answers grounded in your architecture, plus paste-ready prompts for your builder.
Project memory keeps every decision; a monthly health report tells you what's built, what's risky, and what to do next — so nothing drifts silently.
This is Co-pilot — your AI technical cofounder on retainer for $299/mo, zero equity. Most founders start with a one-time review, then keep Jaguar on from MVP to launch.
Request a demo →Start free. Get one deep audit with a CTO in the room — then keep a co-pilot on as you build.
Every project gets a workspace, and the workspace is the product. It keeps your PRD, your architecture and every decision you have made, and it learns your niche and how you work — so the agent argues from what it already knows about your system rather than starting cold each session. The agent itself is the same at every tier. What changes: Co-pilot is one workspace, answering when you ask. Fractional CTO is unlimited workspaces, reviewed on every push, plus what a founder needs once there is something to lose — hiring, build-vs-buy, and a diligence pack for your raise.
✦ Free: run your first design review in Studio — no card, no call.
Checkout is instant. Sign in with the same email you pay with and your plan unlocks automatically — cancel anytime.
No — we're the layer above it. Lovable, Bolt, v0, and Cursor are great at writing code. Jaguar AI decides what should be built and how the system fits together, then reviews what those tools produce. Think architect and inspector, not bricklayer.
Yes. Every architecture comes with a plain-English explanation of each decision and why it matters. You'll be able to brief a developer, agency, or AI tool with confidence — and know when something looks wrong.
If you can — great, and Jaguar still helps you vet what they build. But the market reality: a technical cofounder takes 33–50% equity, takes months to find, and cofounder conflict is the #1 startup killer — research on high-potential startups attributes ~65% of failures to it. Jaguar gives you the judgment layer for $299/mo, zero equity, from day one — and if the right human cofounder shows up later, you'll hand them a well-architected system instead of a rewrite.
A human fractional CTO costs $4k–15k/month and has limited hours. Jaguar gives you the same technical judgment instantly, for a flat fee — and if you want a real human in the loop, our Fractional CTO tier pairs the AI with a senior engineer.
A one-line idea, a full PRD, a spec doc, Figma or screenshot designs — or your GitHub repo, including a codebase your AI tool already generated. The more you give, the sharper the architecture and review.
Yes. Our fintech and healthcare templates bake in PCI-DSS, HIPAA, SOC 2, and GDPR considerations so high-stakes products are designed correctly from day one.
No. You share what you have — a link, screenshots, a PDF, or an export — and Jaguar reviews it. Nothing connects to your systems, and your uploads are used only to produce your review. Continuous GitHub monitoring exists for technical teams on Enterprise, and it's read-only and opt-in.
You do — completely. Architectures, diagrams, and recommendations are yours to use, share, and build on however you like.
Describe your idea and watch Jaguar architect it in minutes. No engineer, no equity, no wait.