Best free tier for api

Open-source Node.js headless CMS — fully free to self-host; Strapi Cloud has a 14-day trial then paid, no forever-free cloud tier.

Bandwidth

n/a

Requests

Open-source self-host free (MIT); Strapi Cloud 14-day trial

Paid from

$15/mo

Mailgun — 5,000 emails/month free for the first 3 months, then pay-as-you-go (no forever-free tier). Robust REST API, inbound routing, and email validation.

Bandwidth

n/a

Requests

5,000 emails/month free for first 3 months, then pay-as-you-go

Paid from

$15/mo