Emergent

Multi-agent autonomous app builder

Free tier + paidAI app buildersemergent.sh

What it is

Multi-agent system that plans, codes, tests and deploys, generating React or Next.js frontends on Node.js or FastAPI with MongoDB. It screenshots the running UI to verify its own work and asks clarifying questions. Every change pushes to your private GitHub repo, and Expo covers mobile.

Why it earns a slot

The most autonomous builder on this list — hand it a vague brief and it self-diagnoses and retries instead of stalling on the first error. Best for long unattended runs, not fast visual tweaks.

Know before you commit

Live deployments cost roughly 50 credits a month on top of build credits, so the 10-credit free tier cannot host anything. Minor visual edits trigger 5-minute rebuilds, and browser previews expire after 30 minutes.

Field notes

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Field check

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Pricing snapshot

Free 10 credits/mo · Standard about $17-20/mo (100 credits) · Pro about $167-200/mo (750 credits) · Enterprise custom

Snapshots move fast — verify at checkout, and post a field note if it changed.

Drop into your Lovable chat

Evaluate Emergent (https://emergent.sh) for this project, then use it only if it fits what we are already building.
Context: Multi-agent autonomous app builder. Multi-agent system that plans, codes, tests and deploys, generating React or Next.js frontends on Node.js or FastAPI with MongoDB. It screenshots the running UI to verify its own work and asks clarifying questions. Every change pushes to your private GitHub repo, and Expo covers mobile.
Reviewer notes (general, not written for this codebase): The most autonomous builder on this list — hand it a vague brief and it self-diagnoses and retries instead of stalling on the first error. Best for long unattended runs, not fast visual tweaks.
Watch out for: Live deployments cost roughly 50 credits a month on top of build credits, so the 10-credit free tier cannot host anything. Minor visual edits trigger 5-minute rebuilds, and browser previews expire after 30 minutes.
Pricing: Free 10 credits/mo · Standard about $17-20/mo (100 credits) · Pro about $167-200/mo (750 credits) · Enterprise custom
Rules: treat the notes above as background only. Do not assume a theme, style, layout or feature that is not already in this project — inspect the existing code first and ask me before changing visual direction.

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