Your database is the hardest part of your stack to change later. Frameworks, hosting, auth — you can swap those in a weekend. But migrating a database with live data, foreign keys, and application logic baked into the query layer? That's a month of pain you don't want.
Which means this decision deserves more thought than most founders give it.
tl;dr
For most solo SaaS founders in 2026, serverless Postgres is the right default — either Neon or Supabase. Neon for a pure database with the best DX. Supabase for an all-in-one platform. Firebase only for mobile-first apps. PlanetScale only for MySQL compatibility. Start with the right choice now — free tiers make it cost nothing.
The decision framework
Before comparing specific tools, answer these four questions:
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Is your data relational? If users have accounts, accounts have subscriptions, subscriptions have invoices — that's relational. Use Postgres or MySQL. If your data is truly unstructured (logs, analytics events), consider a document store.
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Do you need realtime? If your app needs live updates (chat, collaborative editing, live dashboards), Supabase's realtime subscriptions or Firebase's realtime database are purpose-built for this. If you're building a content site or standard SaaS, you don't need it.
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What's your hosting model? If you're on Vercel or Netlify (serverless), you need a database that handles connection pooling well. Traditional Postgres with persistent connections doesn't work in serverless. Neon and Supabase both handle this natively.
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How much do you want bundled? Supabase gives you database + auth + storage + realtime + edge functions. Neon gives you just a database. Both are valid — it depends on whether you prefer an integrated platform or best-of-breed components.
The contenders
When to pick Neon
Best for: Solo founders who want a pure database with excellent DX and no platform lock-in.
Neon is what I use for fromscratch.dev. It's serverless Postgres with two killer features:
Database branching. Create a branch of your entire database — schema and data — in seconds. Test migrations against real data without touching production. This alone has saved me from multiple broken deploys.
Autosuspend compute. When nobody's using your app, the compute scales to zero. You pay nothing. When traffic spikes, it scales up automatically. For an early-stage SaaS with unpredictable traffic, this pricing model is perfect.
The trade-off: Neon is just a database. You'll need separate solutions for auth, storage, and realtime. For me, that's a feature — I pick the best tool for each job. For someone who wants to move fast with fewer decisions, it's extra setup.
For a detailed comparison, see Neon vs Supabase.
When to pick Supabase
Best for: Solo founders who want database + auth + storage in one platform with minimal setup.
Supabase is the all-in-one choice. You get Postgres, authentication (with social login, magic links, and MFA), file storage, realtime subscriptions, and edge functions — all from one dashboard.
The appeal is speed: you can go from zero to a working app with auth and a database in an afternoon. The Supabase client library handles auth state, database queries, and file uploads with a clean API.
The trade-off: tight coupling. If you outgrow Supabase Auth and want to switch to Clerk, you're rewriting your auth layer. If their pricing changes, you're locked into renegotiating or migrating everything at once. Your database is standard Postgres (which migrates easily), but the platform services don't.
See the full Supabase review and Supabase vs Firebase comparison.
When to pick Firebase
Best for: Mobile-first apps that need realtime data sync across devices.
Firebase is Google's app platform, centered around Firestore (a document database) and its realtime sync engine. If you're building a mobile app where data needs to sync instantly across devices — chat, collaborative editing, multiplayer games — Firebase's client SDK makes this almost trivial.
Why I wouldn't use it for a standard SaaS: Firestore is a document database, not relational. Modeling things like "users who belong to teams that have subscriptions" is awkward and requires denormalization. Pricing is per-read/write operation, which is unpredictable. And vendor lock-in is extreme — there's no standard query language to migrate away from.
When to consider Turso
Best for: Edge-first applications where latency matters more than anything.
Turso is libSQL (a fork of SQLite) that runs embedded at the edge. Your database lives next to your users, not in a single region. Read latency drops to single-digit milliseconds.
The catch: SQLite isn't Postgres. You lose advanced types, JSON handling, full-text search, and the massive Postgres extension ecosystem. For simple CRUD apps that need speed, Turso is compelling. For a complex SaaS with relational data, Postgres is more capable.
The migration reality check
This is the question that matters most: how painful is it to switch later?
The pattern is clear: starting with Postgres gives you the most options later. Both Neon and Supabase use standard Postgres, so migrating between them (or to any other Postgres host) is straightforward. Starting with Firebase or a non-standard database limits your future choices.
What about cost at scale?
Here's what each database costs as your SaaS grows:
Firebase's pricing is the wildcard. It's usage-based per operation, so a poorly optimized query or a sudden traffic spike can blow up your bill. The other options have more predictable pricing tiers.
Model your revenue at different price points
See how many customers you need to cover your infrastructure costs and hit your income goals.
Try the revenue calculatorMy recommendation
If you're a solo founder building a SaaS in 2026:
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Default choice: Neon. Best DX, true scale-to-zero, database branching, standard Postgres. Pair it with Drizzle ORM and pick your own auth/storage solutions.
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Speed choice: Supabase. If you want to launch fast with auth and storage included, and you're OK with platform coupling. Great for MVPs and hackathon-speed projects.
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Avoid unless you have a specific reason: Firebase (lock-in), PlanetScale (no free tier), and rolling your own Postgres on a VPS (ops burden).
Pick Postgres. You'll never regret it.
verdict
Start with serverless Postgres — either Neon or Supabase. Both have free tiers that cover your first thousand users. The database is the hardest thing to change later, so choose the option that gives you the most flexibility: standard Postgres, good migration tooling, and predictable pricing. If in doubt, pick Neon for control or Supabase for speed.
Related comparisons and guides
- Neon vs Supabase — detailed head-to-head comparison
- Supabase vs Firebase — when to pick a BaaS
- Supabase review — hands-on review after months of use
- Best database tools — full category ranking
- Prisma vs Drizzle — choosing an ORM
- My full tech stack — how the database fits into the bigger picture
Track the metrics that matter
Once your SaaS is running, track MRR, churn, and LTV with our free calculator.
Open SaaS metrics calculatorFAQ
What's the best database for a solo founder SaaS?+
Serverless Postgres — either Neon or Supabase. Both have generous free tiers, excellent developer experience, and scale well. Neon is better as a pure database. Supabase is better if you want auth and storage bundled in. Both use standard Postgres, so you can migrate between them relatively easily.
Can I start with SQLite and migrate to Postgres later?+
You can, but it's painful. SQLite and Postgres have different type systems, different JSON handling, and different concurrency models. If you think you'll need Postgres eventually, start with Postgres. The free tiers make it cost nothing to start with the right choice.
Is Supabase free tier enough for a real SaaS?+
Yes, for early stage. Supabase's free tier gives you 500 MB storage, 2 GB bandwidth, and 50,000 monthly active users for auth. That's enough for thousands of users. You'll need to upgrade around $25/month when you hit storage limits or need daily backups.
Should I use an ORM or write raw SQL?+
Use a lightweight ORM like Drizzle. It gives you type safety and migration management without hiding the SQL. You can always drop to raw SQL for complex queries. Avoid heavy ORMs like Sequelize that abstract too much — when something breaks, you need to understand the actual query.
Is Firebase still a good choice in 2026?+
For mobile-first apps with realtime requirements, yes. For a traditional SaaS with relational data, no. Firestore's document model makes relational queries awkward, pricing is unpredictable at scale, and vendor lock-in is extreme. You can't easily migrate away from Firestore.