Best Free Database Software for Founders (2026)

The Question That Made Me Realize Nobody Means the Same Thing

A friend messaged me last month. He’d just started building his first SaaS, and he asked what I thought was a simple question: “What’s the best free database software?”

I started typing “Postgres on Neon” and then stopped. Because I realized he might be asking one of two completely different things, and the answer for each is different.

Was he asking which database engine is free — the actual software, Postgres vs MySQL vs SQLite, the thing that stores your rows? Or was he asking which managed service has a free tier good enough that he never has to run a server at all? Those sound like the same question. They are not. And almost every “best free database” listicle you’ll read blurs them into mush, which is exactly why founders end up confused, spinning up a $19/month box on AWS RDS to run a database that could have cost them nothing.

So before I answer, let me untangle the phrase — because once you see the two halves clearly, the decision basically makes itself.

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”Free” Means Two Different Things

Here’s the split, and it’s the whole point of this post.

1. The engine is free. The database software itself — the code that stores and queries your data — is almost always free and open-source. PostgreSQL, SQLite, MySQL, MariaDB — you can download any of them today, run it on your laptop, and never pay a rupee. That’s “free” as in the license.

2. Running it is where the money hides. A database engine sitting on your laptop is useless to a SaaS. It needs to live on a server that’s online 24/7, backed up, patched, and reachable from your app. That’s the part that historically cost money — a VPS, an RDS instance, a DevOps afternoon you’ll never get back. That’s “free” as in the hosting.

Most people asking about “free database software” think they’re shopping for #1. What actually matters for a broke founder is #2. The engine was never the expensive part. The server was. And the genuinely good news in 2026 is that a handful of managed services will run the server for you, for free, until you’re making money.

So this post is two lists. The free engines, quickly. Then the free managed tiers, which is where you should actually spend your attention.

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The Free Engines (You Could Host These Yourself)

Every serious open-source database engine is free. The differences aren’t about price — they’re about what shape of problem you’re solving. Here’s the honest short version.

PostgreSQL is the one. It’s released under a permissive open-source license, it’s been battle-tested for decades, and it does relational data, JSON documents, full-text search, geospatial queries, and — with pgvector — vector search for AI, all in one engine. If you take nothing else from this post: your default is Postgres, and it’s free. I’ve argued this to death in the survival guide, and I stand by every word.

SQLite is the world’s most deployed database and it’s public domain — freer than free. But it’s not a server; it’s a file. A single .db file your app reads and writes directly. That sounds like a toy until you realize it’s ideal for edge deployments, per-user isolation, and read-heavy workloads. Hold that thought — it comes back when we get to Turso.

MySQL and MariaDB are the other big free engines. MySQL is owned by Oracle and dual-licensed (a free open-source community edition plus a paid commercial one); MariaDB is the fully-open community fork the original MySQL creators spun up when they got nervous about Oracle. Both are free, both are excellent, and for a new SaaS in 2026 you almost certainly want Postgres instead — I laid out exactly why, and the one case where MySQL still wins, in Postgres vs MySQL.

That’s the engine list. Notice something: I didn’t compare their prices, because they’re all zero. The engine is a solved problem. Which is why the interesting question is the second one.

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The Free Managed Tiers (So You Don’t Run a Server)

This is the part that actually saves you money and sanity. These services take one of the free engines above, run it on real infrastructure, and hand you a free tier generous enough to power a real product with zero users — which, let’s be honest, is most of us for a while. I verified every number below against their current pricing pages, because free tiers change constantly and a stale figure is how you end up planning around a limit that no longer exists.

Service	Engine	Free tier (2026)	The catch
Neon	Postgres	0.5 GB per project, up to 100 projects, 100 CU-hrs each	Cold starts after 5 min idle
Supabase	Postgres	500 MB DB, auth + storage + realtime, 2 active projects	Pauses after 7 idle days
Turso	SQLite	5 GB, 100 databases, 500M row reads/mo	SQLite, not Postgres
Cloudflare D1	SQLite	5 GB, 5M row reads/day, 100K writes/day	Locked to the Cloudflare/Workers world

Let me walk the two that matter most.

Neon is my answer for the overwhelming majority of founders, and the reason is one word: it scales to zero. After five minutes of no queries, your compute spins down and you stop being billed. A request comes in, it wakes back up in a few hundred milliseconds. The database is always reachable — it just gets cheap when nobody’s looking. And critically, the free limits are counted per project, not per account, and you get up to a hundred projects. That’s why I run seven Postgres databases on Neon for exactly $0 — one project each, each with its own free bucket, none of them ever going dark. I wrote up the whole mechanism in how I run 7 Postgres databases for free on Neon, because it genuinely feels like a cheat code the first time you see it.

Supabase is the other real contender, and it’s a different kind of tool. It’s not just a database — it’s the open-source Firebase alternative, bundling Postgres, authentication, file storage, realtime, and auto-generated APIs into one dashboard. For a non-engineer, or an engineer in a hurry, it’s the fastest path from idea to live product. The free tier is genuinely generous — 50,000 monthly active users, which most SaaS never sees. But there’s one line that bites: on the free tier, if your project gets no requests for seven days, it pauses. The whole thing goes offline until you log in and click “restore.” I watched a friend’s app go dark right when a potential client finally clicked her link — the full autopsy is in the Supabase free tier guide.

I’m deliberately not re-running the full Neon-vs-Supabase cage match here, because I already did it properly — pricing at scale, lock-in, and the plot twist about Vercel Postgres quietly becoming Neon — in Neon vs Supabase vs Vercel Postgres. If you’re torn between those two, that’s the post to read next.

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SQLite at the Edge: Turso and Cloudflare D1

The two SQLite-based services deserve their own moment, because they solve a problem Postgres doesn’t.

Turso forked SQLite and turned it into a platform where you get isolated databases per user or per project — and their free tier is wild: 5 GB, up to 100 databases, 500 million row reads a month, all for zero. If you’re building a multi-tenant app or AI agents where each tenant wants a hard wall around their data, one SQLite database per user is a beautiful pattern, and Turso makes it cheap. Paid plans start at $4.99/month when you outgrow free.

Cloudflare D1 is SQLite living inside Cloudflare’s Workers ecosystem — 5 GB free, with daily read/write caps rather than monthly ones. It’s genuinely great if you’re already building on Cloudflare Workers. If you’re not, don’t contort your whole stack to reach it; the gravity only makes sense when you’re already in that world.

Both are excellent, and both are situational. They’re the “1%” tools — reach for them when per-user isolation or edge latency is a real requirement, not because they scored well on a listicle. That whole rabbit hole — Turso, columnar files with DuckDB, and the rest of my over-engineering — is the advanced database guide.

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So What Do You Actually Pick

Strip away the noise and here’s the honest verdict.

The engine is free no matter what, so stop shopping there — pick Postgres and move on. The decision that actually matters is who runs the server, and for roughly 99% of founders the answer is: Postgres on Neon, free tier. It scales to zero so an idle side project costs nothing, it never goes dark, and you can run a hundred of them. That’s the whole game.

The exceptions, briefly:

• Want auth, storage, and realtime handed to you so you can ship this weekend without wiring six services together? Supabase — just set a reminder to poke it before the 7-day pause.
• Building multi-tenant or per-user isolation, or living at the edge? Turso (or Cloudflare D1 if you’re already on Workers).
• Genuinely need MySQL? The engine’s free; run it on a managed host, but read why you probably don’t first.

And whatever you pick, don’t store files in the database — that’s what a cheap CDN like Bunny is for. Keep the database lean and it stays free longer.

The Bottom Line

“Best free database software” is a trick question, and I almost fell for it while answering my friend. The software — the engine — has been free for decades. Postgres, SQLite, MySQL: download any of them, zero cost, forever. That was never where your money was going to leak.

Where it leaks is the server — and in 2026 that leak is patched too, because Neon and Supabase and Turso will run the server for you, for free, until you have customers. That’s the actual answer to the question. Not “which engine,” but “which managed tier lets me not think about the server at all.” For me, that’s Postgres on Neon, and it has been for years. Whether you wire up Prisma or Drizzle on top of it is a detail; the free, always-on, scale-to-zero Postgres underneath is the win.

Your database was never going to be your bottleneck. So pick the free one that gets out of your way, and go spend your energy on the thing that’s actually hard: getting someone to use what you built.

This is the Broken Engineer Guide — I over-engineer everything, fail at business, and hand you the receipts so you skip the scars. Now go build something, and let it scale to zero while you sleep.