If you're building an app, you eventually need somewhere for the data to live: a database, a way to log users in, storage for files, and an API for your frontend to talk to. Writing all of that by hand takes weeks. A backend-as-a-service (BaaS) platform gives you that plumbing already built — you plug in your app and skip straight to the part that makes your product unique. In 2026 there's a new twist: several of these platforms are now built for AI coding agents like Claude Code or Cursor to provision and manage the backend themselves, not just for a human clicking through a dashboard. Below are six real BaaS platforms worth knowing, from the no-code veteran to the newest agent-native entrants.
1. Xano — the mature no-code choice
Xano is the platform to reach for if you want a production-grade backend without writing backend code at all. It runs on real managed PostgreSQL rather than a proprietary data store, and it ships with compliance boxes already ticked (SOC 2, ISO 27001, HIPAA-ready, GDPR). It even has CI/CD with branching and approval gates, which is rare for a visual tool.
Price: Free tier for development/testing; Essential $85/month (billed annually) for production; Pro $224/month; custom Enterprise with Cloud, BYOC or single-tenant deployment.
Verdict: Pick Xano if you want the most battle-tested no-code backend on the market and don't mind paying $85+/month before you've shipped anything. It's overkill if you're comfortable writing code yourself — cheaper agent-native options below cover that case.
2. InstantDB — real-time and local-first, open source
InstantDB bundles a database, auth, permissions, storage and real-time sync into one tool, with data living on the client and syncing instantly across users and devices — think a modern, open-source Firebase. It's relational (not just a key-value local cache), which is unusual for a local-first tool.
Price: Free — unlimited API calls, 1GB storage. Pro $30/month (10GB, then $0.125/GB beyond). Startup $600/month (250GB). Custom Enterprise with SLAs.
Verdict: Pick InstantDB for real-time, multiplayer or offline-capable apps where instant sync matters more than a huge ecosystem. It's younger than Firebase or Supabase, so the track record at large scale is thinner, and migrating off it once your permission model is baked in isn't trivial.
3. InsForge — a backend an AI agent can clone and experiment with
InsForge is built around a specific idea: instead of a human wiring up a database, login system and file storage by hand, an AI coding agent asks InsForge for a complete backend — and can clone an isolated copy of the whole thing to experiment safely, git-branch style. It's fully open source (Apache 2.0, ~12,400 GitHub stars) with Stripe and PostHog integrations ready to go.
Price: Free to self-host (open source). No published pricing yet for a hosted offering.
Verdict: Pick InsForge if you're working heavily with Cursor or Claude Code and want a backend those agents can provision and branch on their own. The "agent-native" positioning is partly marketing — under the hood it's still a conventional backend — and there's no public pricing for anyone who doesn't want to self-host.
4. Powabase — backend plus RAG for AI products
Powabase goes a step further than a generic backend: it bundles a database, a document-search engine and a visual agent builder together, so building an AI product doesn't mean separately wiring up Postgres, a vector store and an orchestration framework. Vector search runs sub-100ms thanks to co-located compute, and OCR/multimodal indexing is built in.
Price: Open source core (Apache 2.0, self-hostable via Docker Compose). Managed cloud and enterprise tiers exist but pricing isn't public.
Verdict: Pick Powabase if you're specifically building an AI product that needs RAG over documents, not just a generic app backend — it's overkill otherwise. It's also less proven than Supabase for plain backend duty, and you'll need a sales conversation to get a real price.
5. Butterbase — backend-in-a-box with a native AI gateway
Butterbase covers the standard backend checklist (database, auth, functions, storage, real-time) on a PostgreSQL core with row-level security, and adds an AI gateway and MCP server as first-class features rather than bolted-on extras. The team claims 1,000+ companies already use it, backed by published case studies.
Price: Free playground (500MB DB, 10K MAU, $1 of AI credits). Launch $19/month. Certified $90/month. Enterprise custom. Overages billed for storage, bandwidth and AI credits.
Verdict: Pick Butterbase for the cheapest agent-native entry point on this list ($19/month) if you want AI features built into the backend itself. The credit-based AI pricing is more complex to predict than Supabase's flat plans, and its ambition to also unify CRM/billing/support is still unproven.
6. Specific — full stack designed to be driven by an agent, not a dashboard
Specific is explicitly built so an AI coding agent can provision databases, storage and APIs itself through a native MCP server, instead of a human clicking through a UI. The stack is unusually complete for a newcomer: database, storage, Redis, vector search and workflows, plus edge deployment with CDN/TLS and point-in-time PostgreSQL backups included.
Price: Free — 5 projects, 512MB DB, 1GB storage. Pro $25/month + usage. Scale $299/month + usage. Enterprise custom.
Verdict: Pick Specific if you want the most complete agent-driven stack (DB + storage + Redis + vectors + workflows in one) and can live with usage-based pricing that's harder to predict than a flat plan. The free tier is tight (512MB, 5 projects) and the community is much smaller than Supabase's.
How they compare
| Platform | Best for | Starting price | Open source |
|---|---|---|---|
| Xano | No-code teams needing a mature, compliant backend | Free (prod from $85/mo) | No |
| InstantDB | Real-time, offline-capable, multiplayer apps | Free (Pro $30/mo) | Yes (Apache 2.0) |
| InsForge | AI agents that need to clone/branch a whole backend | Free (self-hosted) | Yes (Apache 2.0) |
| Powabase | AI products needing built-in RAG/vector search | Free (self-hosted core) | Yes (Apache 2.0) |
| Butterbase | Cheapest agent-native backend with a native AI gateway | Free (Launch $19/mo) | Yes (Apache 2.0) |
| Specific | Most complete stack driven entirely by an AI agent | Free (Pro $25/mo + usage) | No |
There's no single winner here — it depends on who (or what) is doing the building. If a human is assembling the app through a visual builder, Xano is still the most proven option. If you want a lean, real-time database with an open-source license, InstantDB is a solid pick. And if you're leaning on Claude Code or Cursor to build and manage the backend itself, InsForge, Butterbase and Specific are the three purpose-built for that — with Butterbase currently the cheapest way in and Specific the most feature-complete.