Best backend as a service tools
Published · Grounded in real discussions
Choosing a BaaS is one of the highest-leverage decisions you make when building a SaaS product — it shapes your pricing exposure, your compliance posture, and how painful a migration will be if you outgrow it. This roundup is for solo developers, technical founders, and small teams who are actively evaluating options, not just looking for a default. The key variables to weigh: data control, pricing predictability, GDPR exposure, and how tightly the platform will lock you in.
What to look for before you pick
The recurring frustrations in this space cluster around a few themes: surprise billing that hits at the worst moment, US-based infrastructure that creates GDPR headaches for European teams, and lock-in that makes migration painful once you're at scale. Mainstream BaaS tools also tend to be built for consumer apps, leaving B2B requirements like multi-tenancy and audit logs as DIY problems. Keep those trade-offs in mind as you read through the options below.
For first-time builders who just need something that works
If you're shipping your first SaaS and the volume of conflicting stack advice is making it hard to start, Supabase is the most commonly recommended starting point for lean teams and solo developers. It covers database, auth, and storage in one place, which meaningfully reduces the number of decisions you have to make upfront. The caveat: some developers who've grown with it eventually evaluate splitting off specific concerns — auth in particular, where Clerk comes up as a dedicated managed alternative worth considering if auth complexity becomes a bottleneck.
Clerk is purpose-built for authentication and handles the managed auth layer well enough that it shows up repeatedly in stack discussions alongside other BaaS tools. It's not a full BaaS replacement, but pairing it with a database-and-storage layer is a pattern that works for teams who want best-of-breed over all-in-one.
For teams worried about unpredictable costs
Billing surprises are one of the most consistent complaints in this space, particularly around per-invocation pricing, subscription creep, and arbitrary service limits. Azure draws specific criticism here — users describe it as heavy-handed with subscriptions and prone to hitting unexpected limits, which makes it a poor fit for founders who need cost predictability at the MVP stage.
For file storage specifically, Cloudflare R2 comes up as a cost-effective alternative to AWS S3 in lean stacks. It's not a full BaaS, but if storage costs are a line item you're trying to control, it's worth evaluating as a component rather than defaulting to whatever your primary cloud provider charges.
AWS is the dominant cloud provider in the conversation, but it's consistently described as overkill for SaaS MVPs — the complexity and cost model don't suit early-stage products well. It becomes more relevant once you're scaling and have the engineering capacity to manage it.
For European teams navigating GDPR and data residency
This is one of the most active areas of concern right now. European teams are auditing and replacing US-based BaaS tools due to GDPR enforcement, the Cloud Act, and the practical risk of USD-denominated pricing swings. AWS gets mentioned in this context, but primarily as something teams are moving away from rather than toward — the US jurisdiction is the problem.
Scaleway and Hetzner are the alternatives that come up for EU-hosted infrastructure. Scaleway is positioned as a European cloud option that fits GDPR-compliant stacks, while Hetzner is raised alongside it as a more cost-effective hosting alternative. Neither is a full BaaS in the all-in-one sense, but for teams self-hosting a backend layer on European infrastructure, both are practical choices. Hetzner in particular is noted for its cost efficiency, which matters when you're trying to avoid both compliance risk and budget surprises simultaneously.
For developers who need end-user data portability
This is an emerging requirement rather than a mainstream one, but it's real — particularly for enterprise SaaS and privacy-sensitive applications. The core problem: mainstream BaaS platforms, including Firebase and Convex, don't give end-users any control over where their data is stored. That's not a minor gap if your customers are asking about data residency or you're building something where data portability is part of the value proposition.
linkedrecords.com is an open-source BaaS built specifically to address this. It's being developed as an alternative to Firebase and Convex with user-controlled data storage as a first-class concern. It's early-stage and carries the trade-offs that come with that, but if data portability is a hard requirement rather than a nice-to-have, it's the only option in this list that directly targets the problem.
For technical founders worried about lock-in
Vercel is the clearest example of a platform that developers feel locked into — the combination of tight integration with its deployment model and costs that become unpredictable at scale makes it a recurring source of frustration for B2B SaaS founders. If you're building something where you expect to need migration flexibility, it's worth stress-testing your exit path before you're deep into the stack.
The broader pattern here is that any managed BaaS creates some lock-in by design. The practical mitigation is to separate concerns where you can — use purpose-built tools for auth, storage, and database rather than a single vendor's bundled offering — and to prefer options with self-hosting paths or open-source cores.
How to self-select
- Shipping an MVP fast, first-time builder: Start with Supabase, and consider Clerk if auth complexity grows.
- Cost-sensitive, want predictable billing: Avoid Azure for early-stage. Evaluate Cloudflare R2 for storage as a standalone component.
- European team with GDPR requirements: Look at Scaleway or Hetzner for EU-hosted infrastructure instead of defaulting to AWS.
- Building privacy-first or enterprise SaaS where data portability matters: linkedrecords.com is the only option here explicitly built for that problem, with the trade-offs of an early open-source project.
- Concerned about long-term lock-in: Scrutinize Vercel before committing, and prefer open-source or self-hostable components where possible.
No single tool wins across all of these dimensions — the right choice depends on where your biggest constraint sits today.