Free PostgreSQL cloud database options

You want a managed Postgres for a side project and you do not want to hand over a card. Good news: several of these free tiers are real. The catch is that they are real in different ways, and the differences are exactly what bite you at 2 a.m.

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Several managed Postgres services have genuinely free tiers that are good enough for a side project or an MVP — Supabase, Neon, and Aiven-style free plans, plus Oracle's Always Free autonomous database and Azure's Postgres offer. They differ mainly in how much storage you get, whether the database pauses when it sits idle, and what extras (branching, built-in auth, connection pooling) come along. Pick by whether your project sleeps and where the rest of your stack lives. That is the whole decision, and the rest of this note is the detail underneath it.

I have shipped small things on most of these. The pattern that trips people up is not raw performance — free Postgres is plenty fast for a project with a few hundred users. It is the boring operational stuff: a database that pauses and adds a cold start, a storage cap you did not see coming, a connection limit that a serverless function fleet blows through in an afternoon. So let me line them up honestly, name the catch on each, and then say where the Azure route earns its place.

The lineup, side by side

Prices and limits move — providers revise free tiers a couple of times a year, so treat the numbers below as the shape of the offer, not a contract, and check the provider's own pricing page before you commit. As of mid-2026 this is roughly what each one hands you.

Free Postgres is rarely too slow. It is the pause, the storage wall, and the connection cap that surprise you.

The real catch on each one

Every free tier has a wall you meet first. Knowing which wall is coming is most of the skill.

• Supabase — the pause and the 0.5 GB. Two things bite. A free project pauses after about a week of no traffic, so a demo you have not touched greets your interviewer with a spinner until you resume it. And half a gigabyte fills faster than you think once you store images or logs in rows instead of object storage. Keep blobs out of the database and you stretch it a long way.
• Neon — the cold start. Scaling compute to zero is the whole point, and it is great for a preview branch per pull request. But the first query after an idle spell waits roughly a second while the compute wakes. For a background job that is nothing; for a user staring at a login form it is a beat too long. If your app must feel instant on the first hit, keep it warm or pick something that does not pause.
• Aiven — no HA, small ceiling. It stays on, which is nice, but the free plan is a single node with no high availability and a modest storage ceiling. It is a good way to test the vendor's managed experience; it is not where you park anything you would miss.
• Oracle Always Free — the account and the reclaim. The most generous storage on the list and genuinely permanent, not a trial. The catches are a sign-up that asks for a card for identity verification (it does not charge the free resources), and that an idle autonomous database can be reclaimed after about a week unless you keep it active. Capacity in the free regions can also be tight.
• Azure — it is a runway, not forever-free. The flexible-server free offer is a 12-month burstable instance plus storage, in the shape of the classic PaaS managed database. After the year it converts to pay-as-you-go. That is the honest limit — but for the thing Azure is genuinely good for, twelve months is plenty.

Sleeps vs. stays awake — the fork that decides it

Strip away the feature lists and the choice comes down to one question: can your project tolerate a cold start? If it sits idle most of the day and a one-second wake on the first request is fine — a hobby tool, an internal dashboard, a preview environment — then the serverless options are the better deal. The auto-pause is not a defect there; it is why the free tier can afford to be free, and Neon's branching and Supabase's built-in backend give you more per gigabyte than a plain database would.

If your project gets steady traffic and a cold start would show, you want something that stays awake. Oracle's Always Free autonomous database is the strongest never-pause option on pure generosity. A small always-on VM running Postgres yourself — on Oracle's Ampere free compute, or any cheap instance — never pauses either, at the cost of you now owning patching and backups. That is a real cost; do not take it on unless you want the practice. We work through exactly that tradeoff in the cheapest database for a side project, which is the broader engine-agnostic version of this question — this note stays Postgres-only on purpose.

When the Azure route makes sense

Most roundups end here with "just use the free serverless one," and for a throwaway project they are right. But there is a specific situation where Azure Database for PostgreSQL is the correct call even though it is a 12-month offer rather than forever-free: when the rest of your system already lives in Azure.

If your app runs on App Service or Azure Functions, your users authenticate through Entra, and your traffic flows over a private virtual network, then a database in the same subscription buys you things a third-party free tier cannot. Private connectivity, so the database never touches the public internet. Managed-identity authentication, so your app connects with an Entra identity instead of a password sitting in an environment variable. One bill, one access-control boundary, one blast radius. If your object storage is already in an Azure storage account, keeping the database next to it means one network, one identity model, one place to reason about a breach.

There is also the portfolio angle, and I care about this one because it is where certified people fall short of hired ones. A Supabase project proves you can call an API. An app where the database, the compute, the identity, and the network all sit inside one Azure subscription and talk privately proves you can run cloud infrastructure end to end. That is the sentence an interviewer remembers. For that project, the 12-month free flexible server is not a limitation — it is a full year of runway to build the thing that gets you the job.

So: for a quick side project that sleeps, take Neon or Supabase and enjoy the branching and the built-in backend. For an always-on hobby app, Oracle Always Free gives you the most room and never pauses. And when you are building the thing meant to prove you can operate Azure — the resume piece — put the database in Azure with everything else and connect it privately. Match the tier to the job, not to the leaderboard, and every one of these is a genuinely good free start.

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