Buildoto
Technical details

Supabase or Cloudflare D1: how I choose

Two excellent databases, two different uses. Here are my concrete criteria, and why I often combine the two.

SM

Sébastien Mignot

TJM 440 € HT/jour · forfait fixe

app.exemple.com
Monthly revenue
12 480 €
+18%
Signed contracts
34
+6
Conversion
24,1%
+2,3pt
Signatures / week
Acme SASSigned4 900 €
NorthwindIn progress8 200 €
GlobexSigned3 600 €

The problem

What slows you down, and what we change

Today

  • Choosing the wrong database at the start means a costly migration when the app grows.
  • Online comparisons stay theoretical and ignore your real case.
  • Underestimating the limits is discovered too late, in production.

With Buildoto

  • The right engine chosen for YOUR case, not by dogma.
  • A choice reasoned on your real volumes, latency and regions.
  • The boundaries are set from the start, with no bad surprise.

Supabase (PostgreSQL), when the data is rich and relational: complex relations, built-in auth, multi-tenant RLS, vector search (pgvector), large volumes. The default for a real SaaS.

Cloudflare D1 (SQLite at the edge), when you need ultra-fast reads everywhere, a simple scope, and native integration with Workers. Ideal for small/medium apps or content served at the edge.

Both together, common and intentional: Supabase as the main application database (data, auth), Cloudflare D1/Workers up front for speed and global delivery. I decide based on your data relations, your volume, your latency needs and your budget, without dogma.

My decision criteria, plainly

  • Data relations: rich joins, transactions, constraints → PostgreSQL (Supabase). Simple reads by key or by page → D1 is enough.
  • Auth and multi-tenant: need for accounts and per-client isolation → Supabase (built-in auth + RLS). D1 has no native auth.
  • Latency: readers everywhere in the world and content that rarely changes → D1 colocated with Workers, answers in milliseconds. This site is the proof: buildoto.com serves its content from D1 at the edge.
  • Volume: D1 targets databases of a few GB; beyond that, or with strong growth, PostgreSQL is the way.
  • Running budget: D1 starts at a few euros per month, Supabase at 0 then ~$25 per month on the Pro plan. In both cases, negligible compared to the development cost.

The packaged offer

The choice of database is included in the free 30-minute audit: you leave with a reasoned recommendation on YOUR data, even if we do not work together. If we move forward, everything is at a fixed price:

  • Complete application (database + auth + one business feature, deployed) from 6 600 € excl. VAT, 4 to 6 weeks.
  • Feature to integrate into your existing app from 440 € excl. VAT, 2 to 4 weeks.

The technical details are on the Supabase developer and Cloudflare Workers developer pages.

Proof in production

Both in production, on beforbuild.com

beforbuild.com combines PostgreSQL (Supabase) for application data and Cloudflare up front, the concrete proof that I know how to make the two work together as needed.

Visit beforbuild.com
Supabase
application data + auth
Cloudflare
speed + edge delivery
1
point of contact, without dogma

Method

Audit → Build → Production

  1. 01

    Free audit · 30 min

    We choose the right feature and scope your specifications. No commitment.

  2. 02

    Fixed-price quote

    Already-built base + customization priced to your specifications. Price and scope signed within 48 h.

  3. 03

    Customization & production launch

    I adapt the feature to your needs, deploy it and document it. Optimized to run at minimal cost.

Fixed price

Complete application (database + auth + 1 feature)

6 600 € excl. VAT

+ customization quoted on your spec · fixed price signed before we start

Or 440 € HT/day on time and materials, adapted to your needs.

Book

Your free audit · 30 min

Pick a slot. We audit your case and you leave with a fixed-price quote.

FAQ

Frequently asked questions

SM

Who I am

A single point of contact, from quote to production

I design, develop and run my own features in production, BeForBuild.com, the B2B SaaS I run on my own, is the proof. These are the already-proven building blocks I offer you, adapted to your needs.

You talk directly to the person who delivers: no subcontracting, no agency layer. The one who designs is the one who codes and ships to production.

Founder of BeForBuild.comA single point of contactFrom quote to production launch

Stack & intégrations

Cloudflare
Supabase
React
shadcn/ui
TypeScript
Mistral
Stripe
Documenso

Let's talk about your project

Book my free audit · 30 min