A curated list of SaaS, PaaS and IaaS services with free tiers, aimed at system administrators, DevOps engineers and infrastructure developers. The maintainer keeps the scope narrow on purpose: only as-a-service offerings count, not self-hosted software or trials.
Entries are grouped by function, including cloud providers' always-free limits, CI and CD, monitoring, log management, DNS, email, managed databases, storage and authentication. Time-limited plans must last at least a year, and the list also considers security, so services that only offer TLS on paid plans are left out.
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