Bubble vs Custom React MVP for Your Investor Demo

The Short Answer

If you’re pitching next week and have no product, Bubble can get you a clickable demo fast. If you’re raising a seed round and have 3-4 weeks, a custom React (or Next.js) MVP will outperform Bubble in every investor conversation.

The real question isn’t Bubble vs React — it’s “what stage am I at and what am I trying to prove?”

Who This Is For

• Founders preparing for investor meetings who need a working demo
• Pre-seed founders debating whether to invest in a proper build before raising
• Founders with a Bubble prototype wondering if they should rebuild before their seed round

Not relevant if you’re bootstrapping and have no plans to raise — in that case, use whatever gets you to paying customers fastest.

The Investor’s Perspective (What They Actually Think)

The “investors don’t care about tech” myth needs correcting. This is what actually happens:

Pre-seed (£50K-£250K): Most angel investors and pre-seed funds really don’t care if it’s Bubble. They’re betting on the founder and the market. A Bubble demo that shows traction (waitlists, LOIs, early revenue) beats a beautiful React app with no users.

Seed (£500K-£2M): This is where it shifts. Seed investors are pricing in execution risk. A Bubble app signals: “We’ll need to spend 3-6 months of your money rebuilding before we can grow.” A custom codebase signals: “Your money goes straight to features and growth.”

Series A (£2M+): If you’re still on Bubble at this stage, something has gone wrong. Technical due diligence is standard here, and there’s nothing to diligence with no-code.

The Case for Bubble: Speed to Demo

Bubble’s superpower is speed. A competent Bubble builder can create a working, multi-page application with user auth, database, and workflows in 3-5 days. That’s hard to argue with.

For early-stage founders who need to:

• Show something at a pitch event next week
• Test whether users even want this thing before investing in code
• Create a visual prototype more convincing than Figma mockups

Bubble is a legitimate tool. We’ve seen founders raise pre-seed rounds off Bubble demos. It works.

But Be Honest About the Limitations

Bubble demos tend to feel like Bubble demos. The page transitions are slightly off. Data-heavy pages load slowly. The mobile experience is often an afterthought. Experienced investors notice.

More importantly, every pound you invest in Bubble has a shelf life. When you do rebuild (and you will), nothing transfers.

The Case for Custom React: Credibility and Continuity

A Next.js MVP deployed on Vercel, backed by Supabase, styled with Tailwind — this is indistinguishable from a product built by a well-funded startup. It loads fast. It looks sharp. It works on mobile.

When an investor asks “what’s the tech stack?”, you answer with confidence: “Next.js, Supabase, deployed on Vercel, CI/CD pipeline in place.” That answer does real work in the conversation. It says: we’re serious, we’re building to scale, and we know what we’re doing.

What a Demo-Ready React MVP Looks Like

You don’t need a complete product. You need:

1. Authentication — social login or email/password, takes 30 minutes with Supabase Auth
2. The core flow — the one thing that demonstrates your value proposition, polished end-to-end
3. A clean dashboard — shows data, looks professional, responsive
4. Real deployment — custom domain, HTTPS, fast loads

That’s it. Three to five screens, one compelling flow. At LiberateWeb, this is exactly what our Founder tier (£5K, 2-4 weeks) delivers — purpose-built for this moment in a startup’s life.

Real Cost-Benefit Analysis

Consider the maths for a founder raising a £500K seed round:

Bubble path:

• Build Bubble demo: £0-£500 (your time + platform fees)
• Use it for fundraising: some investors discount you, let’s say it costs you 10-15% more dilution or a lower valuation
• Post-raise rebuild: £10K-£15K + 6-8 weeks before you can start building new features
• Total cost: £10K-£15K + 6-8 weeks of post-funding runway burnt on rebuild + potential valuation hit

Custom React path:

• Build custom MVP: £5K-£10K pre-raise
• Use it for fundraising: stronger position, better valuation conversations
• Post-raise: start building new features immediately on the existing codebase
• Total cost: £5K-£10K upfront, zero rebuild cost, faster time-to-market post-funding

For most founders raising a seed round, spending £5K-£10K on a custom MVP before the raise is one of the highest-ROI investments they can make.

The Hybrid Approach

Some founders use Bubble to validate, then commission a custom build before fundraising. This is smart if you have the timeline:

1. Weeks 1-3: Bubble prototype, test with 50-100 users
2. Weeks 4-7: Custom MVP build based on validated learnings
3. Week 8+: Fundraise with a real product and real user data

You get the speed of no-code for validation and the credibility of custom code for fundraising. Best of both worlds, if your timeline allows it.

So Which One?

If your investor meeting is in 7 days and you have nothing, build a Bubble demo. Something is better than nothing, and a working prototype is better than slides.

If you have 3-4 weeks and £5K, build a custom MVP. The compounding benefits (investor credibility, scalable codebase, faster post-raise execution) far outweigh the extra time and cost.

And if you’ve already raised on a Bubble demo? Congratulations, that’s great execution. Now rebuild in code before you spend another pound on features, because every feature you add in Bubble is a feature you’ll rebuild later.