Question 1

Can you implement usage-based (metered) billing?

Accepted Answer

Yes. We deeply integrate with Stripe to track API calls, storage used, or active seats, and automatically invoice the tenant at the end of the billing cycle based on their exact usage.

Question 2

Enterprise clients want SSO (Single Sign-On). Is that included?

Accepted Answer

Yes. We can integrate enterprise identity providers using WorkOS or Auth0, allowing your clients to log into your SaaS using their existing Okta, Azure AD, or Google Workspace credentials.

Question 3

What is multi-tenant SaaS architecture?

Accepted Answer

Multi-tenant architecture is a software design where a single instance of the application and its supporting infrastructure serves multiple customers (tenants). Each tenant's data is logically isolated and remains completely invisible to other tenants, allowing for high efficiency and scalability.

Question 4

What are the benefits of multi-tenancy over single-tenancy?

Accepted Answer

Multi-tenancy drastically reduces infrastructure costs, simplifies maintenance, and streamlines updates. Instead of deploying and managing 100 separate servers for 100 clients, you deploy updates to one central application, instantly pushing the new features to all clients simultaneously.

Question 5

How do you ensure data security between different tenants?

Accepted Answer

We enforce strict row-level security (RLS) policies at the database level. Every query automatically filters data based on the authenticated user's `tenant_id`. Additionally, we use separate database schemas or completely separate databases for enterprise clients requiring extreme isolation.

Question 6

Can individual tenants customize the application?

Accepted Answer

Yes. A well-designed multi-tenant app allows configuration, not customization. Tenants can upload their own logos, change color themes, set custom domain names (white-labeling), and configure specific workflow rules, all without altering the core underlying codebase.

Question 7

Which databases are best for multi-tenant applications?

Accepted Answer

PostgreSQL is often our preferred choice due to its robust Row-Level Security features and schema support. For massive global scale, we use distributed databases like CockroachDB or cloud-native solutions like AWS Aurora and DynamoDB.

Question 8

How do you handle scaling when one tenant experiences massive traffic?

Accepted Answer

We use auto-scaling microservices and implement rate-limiting at the API gateway level. The 'noisy neighbor' problem is mitigated by throttling extremely active tenants so they do not degrade the application performance for other tenants on the same infrastructure.

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