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SSL for SaaS

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LeDoré Aren
31 Jan, 2026, 05:31

Hi everyone 👋

I'm building a website builder SaaS using Appwrite Cloud Functions My architecture relies on users connecting their own custom domains via CNAME to my Appwrite Function, which renders their site.

I have 3 critical questions:

  1. Is there a hard limit on the number of custom domains I can add programmatically via the API? (I aim to support thousands of domains).
  2. Does Appwrite Cloud automatically provision and renew Let's Encrypt certificates for all these dynamic user domains, or is this feature intended only for a few static project domains?
  3. Is there an additional cost per custom domain?

I need to confirm this architecture is viable on Cloud before scaling, or if I should look into a reverse-proxy solution. Thanks!

TL;DR
- Building SaaS website builder with Appwrite Cloud Functions, using CNAME for user domains - Questions about API limits for custom domains, SSL certificate provisioning, and additional costs per custom domain - Confirming architecture viability before scaling: consider reverse-proxy solution for scalability if needed.
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