Model CDN & email costs

[MRSallee]

Goal

Understand probable cost impacts of using a CDN (e.g. Cloudflare) and email service (e.g. Resend) by modeling expected usage based on current Squiglink usage.

• CDN used for all Squiglink traffic
• Email used for sending magic login links to squigglers

[MRSallee]

Resend's free tier of 3,000 emails / mo should serve us for a long time.

Assuming each squiggler logs in 5 times per month, end of 2026 is roughly when we'd exceed that.

Presumably we can store login sessions indefinitely and make that projection super conservative.

I also modeled out bandwidth, based on the last year's bandwidth usage. Seems like Cloudflare doesn't charge based on bandwidth, at least for core services?

Might our hosting provider? By end of 2026, we could be looking at ~2Tb of data transfer per month.

https://docs.google.com/spreadsheets/d/1Gavw8BfjoJX_aQnS-Q1H52hfwiZoaUdOqqAAOg2wI1Y/edit?gid=0#gid=0