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Backend + web integration

Supabase+Next.js

Open-source backend for your Next.js app via Supabase: Auth, PostgreSQL, real-time, Storage, and Edge Functions.

Quick answer

Supabase + Next.js integration combines the open-source Firebase alternative with a modern React framework. Includes Auth (email, GitHub, Google, magic link), PostgreSQL (row-level security), real-time subscriptions, file storage, and Edge Functions. Works self-hosted or on Supabase Cloud; EU region available for KVKK.

Setup cost

$700-2.4K

Monthly

Supabase Free (500MB DB, 1GB Storage) → Pro $25/month → Enterprise

Duration

2-4 weeks

Who is this for

→Next.js SaaS product

→B2B platform + user management

→Real-time dashboard

→Multi-tenant application

→Open-source or self-hosted backend

Data flow

Next.js → Supabase JS Client → Supabase (Auth + PostgREST API + Realtime + Storage). Server Components: Supabase Server Client (cookie-based session). Row Level Security isolates data.

Setup steps

  1. 01

    Create Supabase project

    supabase.com → New project → choose region (EU West recommended). API URL + anon key.

  2. 02

    Next.js package install

    npm install @supabase/supabase-js @supabase/ssr. Add SUPABASE_URL + SUPABASE_ANON_KEY to .env.local.

  3. 03

    Auth integration

    Supabase Auth UI or custom form. Server Component: createServerClient (cookie). Client Component: createBrowserClient.

  4. 04

    Database + RLS

    Supabase Dashboard → Table Editor or SQL Editor. Row Level Security policy: each user sees only their own data.

  5. 05

    Real-time (optional)

    supabase.channel() for table change subscription → instant UI updates.

  6. 06

    Deployment

    Vercel + Supabase: add Supabase credentials to .env.production. @supabase/ssr for Edge middleware.

Common pitfalls

  • No Row Level Security = everyone accesses all data
  • Server vs Client Supabase client confusion (Next.js App Router)
  • Supabase Free: 500MB DB — fills up fast
  • Real-time: each channel = connection, there's a limit
  • Self-host: Docker Compose, requires maintenance

Frequently asked questions

Supabase or Firebase?

Supabase: PostgreSQL (relational), strong SQL, open-source, self-hostable, EU region for KVKK. Firebase: NoSQL, Google ecosystem, fast prototyping. Supabase stands out for Next.js + relational data.

How does multi-tenant work?

Row Level Security + organization_id column is the standard approach. Each user has an org; RLS policy filters by organization_id. Schema-per-tenant is also possible (more isolated).

Is Supabase KVKK-compliant?

Compliant with GDPR + KVKK when EU West region is selected. Data Processing Agreement (DPA) available on Supabase site. For sensitive health data, self-hosting may be preferred.

Get a quote for Supabase + Next.js integration

Fixed-scope written proposal after a 30-minute discovery call.

Start a discovery call