Offer custom domains for my SAAS using DO Apps+Cloudflare

I would like to offer custom domains features for customers of my SaaS tool.

Here’s my initial configuration:

  • SaaS domain hosted on Cloudflare.
  • SaaS app hosted on DigitalOcean App Platform.
  • Another domain hosted on Cloudflare. I use it for tests.

It looks like the easiest way to achieve this feature is to use Cloudflare’s SSL for SaaS (documentation).

What I have done:

  1. Create a proxied CNAME for the subdomain and connect it to the DigitalOcean’s app. Now I can use this subdomain to access the app. Easy.

  2. From the SSL/TLS > Custom Hostnames add as a Fallback Origin. Also, add in the hostname section. Custom Hostname

  3. Go to DNS settings and add: CNAME Also add a TXT record to verify the ownership.

I thought that this is enough but it doesn’t work. If I open I get browser’s 404 status page. I’ve checked the SSL certificate and it looks like it’s the correct one (issued by Cloudflare today).

At the same time, works perfectly.

Is there something I’m missing? Do I need to add an A record for (but DigitalOcean doesn’t provide it)? Could it be related to CORS settings or something?

Any help would be much appreciated! It’s been 3 days I’m trying to resolve this.

Probably there’s a better (not Cloudflare’s) solution?

EDIT: I really think I have to do something on the DigitalOcean side. Add a wildcard accepting any domain somehow…?

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Bobby Iliev
Site Moderator
Site Moderator badge
October 24, 2022

Hi there,

There was a similar question asked here:

It is possible to run multiple domains with App Platform. There are limits to the number of domains allowed by default. If you plan to run a SaaS style app with more than a few dozen, I recommend talking to our support/sales team.

The App Platform also supports wildcard domains (ex. * which can be used to ease configuration of lots of subdomains.

Hope that helps!

- Bobby.

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