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Build a Multi-Tenant SaaS with AI
Workspaces, members, roles, billing per tenant. Skip the Clerk/Auth0 per-MAU tax for the auth layer alone.
Get started for free, no credit card needed.
0
Free Supabase MAU before paid auth
0h
Workspaces + roles + invites wired
0%
Tenant data isolation via RLS
0
Per-MAU vendor fees
01 / What you get
Multi-Tenant SaaS, generated.
Click Generate from the box above. Real Next.js code, a real database, real integrations, not a sandbox. Each piece below ships in the first prompt.
01
Workspaces (tenants) with their own data, members, settings
02
Role-based permissions: owner / admin / member / viewer per workspace
03
Invite flow: email invite, accept link, auto-add to workspace
04
Stripe billing per workspace (not per user) with seat-based pricing optional
05
Row-level security in Postgres so tenant A never reads tenant B's data
02 / Variants
3 variants you can ship.
01
B2B SaaS workspace
Teams, projects, shared data. Standard "Notion / Linear" shape.
02
Agency client portal
Each client is a tenant; agency is super-admin across all tenants.
03
White-label SaaS
Each tenant gets their own branding, subdomain, custom email templates.
Pixel-perfect control
The AI builds it. Then you shape every pixel.
Content
Wire up real data
Collections and CMS that feed your live pages.
Color
Pick any color
Components
Reuse your own blocks
Save any section and drop it in anywhere.
Images
Drop in photos
Pull in free imagery without leaving the canvas.
Pages
Structure your site
03 / Who it's for
For people who hate $99-per-seat tools.
→B2B SaaS builders shipping team-shaped products
→Internal-tool platforms multi-tenanted to clients
→Agencies productising their service into a SaaS
Integrations
Works with the tools you already use.
Payments, database, AI, email and analytics, wired up the moment you connect.
04 / Why generate it
Why generate it instead of buying it.
Clerk and Auth0 charge per MAU. Past 10K active users that's thousands a month for auth. Supabase Auth is free up to 50K MAU and self-hostable; Webtwizz scaffolds everything around it.
Multi-tenant security is one of the easiest things to get wrong. Postgres row-level security is the right tool; Webtwizz writes the policies based on the prompt instead of you authoring them by hand.
FAQ
Questions about Multi-Tenant SaaS.
Everything you need to know before you generate it. Anything else, our team is one email away.
Every row in tenant tables has a workspace_id. Postgres RLS policies check that the requesting user belongs to that workspace before returning the row. Even a SQL injection that bypasses your application layer can't cross tenants because the database refuses.
Owner enters an email + role, an invite row is created with a one-time token. Email goes out via Resend with the accept link. Clicking it auths via Supabase, joins the workspace, deletes the invite. If the email already has an account, they auto-join on next login.
Yes. The user-workspace relationship is many-to-many with a role per pair. The UI shows a workspace switcher in the top bar; switching changes the active workspace and the data shown. Standard B2B SaaS pattern.
Each workspace owns its own Stripe Customer ID and subscription. The owner pays. Member seats may add per-seat charges via Stripe metered if your pricing scales by team size. Webtwizz scaffolds either flat-fee or seat-based.
Keep building
More saas apps you can ship.
AI SaaS App
AI features + paid tiers + token tracking. The four pieces every AI SaaS needs, generated in a couple hours instead of a couple weeks.
Newsletter Platform
Subscriber list + paid tier + sending. Stop renting Substack at 10% revenue cut or Beehiiv at $39/month + per-subscriber.
SaaS with Subscription Billing
Login, Stripe Checkout, plan limits, customer portal, the four pieces every paid SaaS needs, generated and wired up. Skip the boilerplate, ship the actual product.
Usage-Based SaaS
Stripe metered billing + per-user quotas + real-time usage display. Skip the metering-as-a-service tax (Metronome, Orb, Lago all charge per event).
Start building
Your idea, live in minutes.
Describe what you want. WebTwizz builds the real thing, then you click to change anything. No code needed.
Get started for free, no credit card needed.