Base44 vs Supabase: What Actually Moves When You Migrate
A plain-English look at where Base44's "do everything" backend lines up with Supabase, where it doesn't, and what the gaps look like in a real app. So you know what you're getting into before you click migrate.
Base44 is a "batteries-included" app builder — entities, auth, storage, an AI for generating text and images, file parsing, sending emails, all behind one SDK. Supabase covers a huge chunk of that, but not all of it. If you're thinking about moving off Base44, the right question isn't "will it work?" — it's "which parts move automatically, which parts need a one-time tweak, and which parts need real work?". This post answers that.
Who this is for
You built something on Base44 that you like. It's growing. You want more control — your own database you can connect to from analytics tools, your own deployment pipeline, your own cloud bill, the option to switch backends later without rewriting the app. You want to know what the move costs you in time and surprises before you commit. This is not a "Base44 vs Supabase, who wins" post; both are good at what they do. It's a "here's the lay of the land" post.
Side-by-side: what each platform gives you
| In your app | On Base44 | On Supabase |
|---|---|---|
| Data model | Entities you define visually; queries through the SDK | Postgres tables; queries through PostgREST or the JS client |
| Server-side code | Functions you write in the Base44 dashboard | Edge Functions (Deno) you deploy via CLI or git |
| Login & accounts | Email/password + OAuth providers, managed by Base44 | Email/password + OAuth (Google, GitHub, Apple, etc.) via Supabase Auth |
| File uploads | Core.UploadFile — drops files in Base44 storage | Supabase Storage buckets with per-bucket access rules |
| Generating text with AI | Core.InvokeLLM — Base44 picks a model and pays for it | You bring your own OpenAI / Anthropic / etc. API key |
| Generating images | Core.GenerateImage — built in | Not built in; you wire OpenAI DALL·E / Stability / Replicate yourself |
| Parsing PDFs / uploaded files | Core.ExtractDataFromUploadedFile — built in | Not built in; you wire an OCR or parsing service yourself |
| Sending email / SMS | Core.SendEmail / Core.SendSMS — built in | Not built in; you wire Resend / SendGrid / Twilio yourself |
The pattern: Supabase is excellent at the data + auth + storage layer (the parts your users hit every day) and intentionally stays out of the "AI features as a service" business. Base44 bundles both. That bundling is what makes the migration interesting.
The three kinds of things you'll see in a migration
Across hundreds of Base44 apps the gaps fall into three buckets. The first one you can ignore. The second is a 5-minute settings fix. The third is the real work — and even there, your AI assistant can do most of it.
1. Stuff that's handled for you automatically
Most of your Base44 SDK calls have a direct Supabase equivalent — querying entities, fetching the current user, uploading a file. When you migrate with Staticbot, these get rewired transparently. Your code keeps calling the same functions; behind the scenes they now hit Supabase. Concretely: the .entities.X reads/writes, auth.me(), and Core.UploadFile all keep working with zero changes from you.
2. One-time setup you need to do once, in the dashboard
Some features work the same way on Supabase — they just need a credential you paste in once.
- AI text generation (
Core.InvokeLLM) — Base44 billed you for it; on Supabase it calls OpenAI / Anthropic directly using your own key. You paste the key once into Supabase, and every InvokeLLM call in your app keeps working. - OAuth login providers (Google, GitHub, etc.) — Base44 hides the client secret on the platform side. Supabase needs you to paste it into the Auth → Providers screen once. Your users keep their existing accounts; only the provider configuration moves.
Total time: usually under 10 minutes for both combined. Important to do; not scary to do.
3. Features Supabase doesn't include — you choose a provider
This is the bucket Base44 users worry about most, and honestly it's the smallest of the three. A handful of Base44 conveniences aren't part of Supabase. You decide who provides them:
Image generation
OpenAI DALL·E, Stability, Replicate, or whoever you prefer
PDF / file parsing
OCR or layout-aware extraction — pick a service or open-source library
Sending SMS
Twilio, MessageBird, anything with an HTTP API
Sending email (transactional)
Resend, SendGrid, Postmark — Supabase also has built-in auth emails
Each one is a small, well-scoped piece of work — sign up for a provider, drop their SDK into one server-side function, replace the Base44 call. The kind of thing your AI assistant (Claude, Cursor, etc.) can finish in one prompt if you give it the right context. Which leads us to —
The compatibility review: your migration's punchlist
The reason we can write the three buckets above with confidence is that Staticbot runs a static analysis pass over your Base44 app before migrating. It walks every entity, every server function, every line of frontend code that uses the SDK — and produces a personalised report of what's in each bucket for your app specifically.
What you get
- Coverage stats — exactly how many entities, server functions, and frontend files were scanned, so you can see we actually looked at everything.
- The "we'll handle this" list — every Base44 call that has a direct Supabase equivalent and will work without changes.
- The "set this once" list — every credential or setting you'll need to paste into Supabase, with the exact location.
- The "needs your attention" list — each unsupported feature with the file path and the line of code that uses it, so a human or an AI can find it in seconds.
The review shows up before you confirm the migration so you can read it, ask questions, and back out if something looks scarier than expected. It also ships inside the downloadable migration package as a markdown file called 00_compatibility_review.md. The format is deliberately designed for AI consumption: each item lists the file path, an evidence snippet, and a suggested approach. You can paste the whole file into Claude / Cursor / ChatGPT after migration and ask it to make the fixes in one pass — most of the "needs your attention" items get resolved in the next ten minutes.
Why this design matters: we considered hiding the warnings behind a "ready to migrate ✓" banner. We decided not to. The risk of a migration tool burying inconvenient truths is bigger than the risk of a slightly long punchlist. So the report is honest — and organised in a way that makes the honest version actionable, not scary.
If your app uses nothing exotic, the review is mostly the green "auto-handled" bucket. If it uses Core.GenerateImage or Core.SendSMS, you'll see those plainly listed, and you'll know exactly what to wire up afterward.
What doesn't change
Your users' passwords
Migrated with their existing bcrypt hashes. Nobody has to reset anything.
Your data shape
Entity schemas become Postgres tables with the same fields. Existing rows come with them.
Your app's behaviour
The pages your users see, the flows they follow — all the same after migration. The change is underneath.
Your ability to keep building in Base44
Use Base44 as your editor; production runs on Supabase. Every push syncs over.
The honest costs of moving
- An afternoon of your time, most of which is the AI doing the work while you watch.
- A Supabase bill instead of (or alongside) a Base44 bill. Supabase's free tier covers small apps; paid tiers start around $25/month.
- API keys for any AI features you use — OpenAI for text generation costs whatever the model you pick costs. Often less than the Base44 portion you were paying for it.
- Replacing the 3–4 conveniences from the "needs your attention" bucket, if your app uses them. Usually one short server function each.
Staticbot does the heavy lifting
We translate your Base44 entities into Postgres tables, move every row of data, generate the compatibility review so you know exactly what's coming, and give you a downloadable package with the punchlist ready to paste into your AI. Free for Base44 migrations right now.