TL;DR. Lovable is the right call for a 1-person founder validating an idea on a single page. A custom AI-native build wins the moment you need real billing, multi-tenancy, custom AI features at scale, or anything beyond a marketing site. We've shipped both — here's where each one breaks.
What is Lovable?
Lovable is an AI app builder — you describe what you want and it generates a working web app in minutes. Same category as v0, Bolt, Replit Agent. Great for prototypes, landing pages, internal tools.
Where Lovable wins
- Day-one validation. A founder with an idea and no developer can ship a presentable landing page in an afternoon.
- Internal tools. Quick admin dashboards, MVP-of-MVP demos, throwaway scrapers.
- Prototyping ahead of a real build. We've used Lovable ourselves to mock client concepts before committing to a custom stack.
Where Lovable breaks
| You need… | Lovable | Custom AI build |
|---|---|---|
| Single landing page + form | ✅ Best choice | Overkill |
| Multilingual EN/FR with hreflang | ⚠️ Brittle | ✅ Native (next-intl) |
| Custom AI features (concierge trained on your docs) | ⚠️ Limited | ✅ Full Anthropic + Vercel AI SDK |
| Stripe billing with plan management | ⚠️ Possible but messy | ✅ Native |
| Multi-tenant isolation | ❌ Won't hold up | ✅ Designed in |
| Performance for SEO (LCP, INP) | ⚠️ Often fails INP | ✅ Optimised stack |
| Codebase ownership + portability | ⚠️ Export possible, opinionated | ✅ Standard Next.js, no lock-in |
| Proposal generator, AI agents, dynamic content | ❌ Not its job | ✅ Native |
How much does each cost?
Lovable: €20–25/month for the tool, plus your time. Usable output in days for a single page.
Custom AI website (TheAIgency Spark tier): 1,500–2,500 EUR, 1-2 weeks, single-page + 1 AI feature, multilingual, codebase ownership, hosting + 1 month support.
Custom AI website (Signal, the default): 3,500–6,000 EUR, 3-4 weeks, 5-8 pages + 2-3 AI features.
The honest math: Lovable is cheaper if "cheaper" means tool-cost. Custom is cheaper if you account for the rebuild cost when Lovable's ceiling is hit.
How we decide for clients
If a client asks for a 1-page launch landing for a SaaS, no AI features beyond a chat widget, throwaway in 3 months — we tell them to use Lovable. We're not going to charge 2k for that.
If they need a proposal generator, a multilingual concierge trained on their business, billing, multi-tenancy, real performance — we build it. The Lovable ceiling is real and hits faster than people expect.
What about migrating from Lovable to a custom build?
It's a rebuild, not a migration. The Lovable codebase is generated AI code, not maintainable production code. We've migrated several Bubble and Lovable apps to V1 stacks — plan for a rewrite, not a port.
Bottom line
Use Lovable for what it's great at: a single page, validated in an afternoon. Move to a custom AI build when the use case crosses any of: real billing, multi-tenancy, custom AI agents, or anything past 1-2 pages.