Ongoing free allowance
APIs & developer toolsResend Free
3,000 transactional emails/month; 100/day; up to 3 domains
Daily sending cap and deliverability/domain-verification requirements apply.
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CATEGORY · 9 SERVICES
APIs & developer tools
Compare included quotas, restrictions and official provider documentation.
Ongoing free allowance
APIs & developer toolsBetter Stack Free
10 monitors/heartbeats; 1 status page
Free personal-project tier; alert channels and log retention have limits.
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Ongoing free allowance
APIs & developer toolsGitHub Actions
Standard GitHub-hosted runners free for public repos; 2,000 minutes/month on GitHub Free private repos
Larger runners and over-quota private-repo usage may be billed.
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Ongoing free allowance
APIs & developer toolsBrevo Free
300 email sends/day; up to 100k contacts
Daily unused sends do not roll over; free emails carry Brevo branding; queues and transactional limits apply.
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Ongoing free allowance
APIs & developer toolsGitHub Codespaces (personal Free)
120 core-hours/month and 15 GB-month storage for GitHub Free personal accounts
Organizations have no included Codespaces quota; 2-core machines use two core-hours per elapsed hour.
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Ongoing free allowance
APIs & developer toolsCloudflare Email Routing
Free inbound custom-domain email forwarding and routing on Free/Paid plans
Not a free outbound transactional email API; Email Sending requires Workers Paid. Domain must use Cloudflare email routing.
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Ongoing free allowance
APIs & developer toolsGitHub Packages
Public packages are free; GitHub Free includes 500 MB private storage and 1 GB monthly transfer
Private quotas share storage with Actions artifacts; over-quota usage may be blocked or billed.
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Ongoing free allowance
APIs & developer toolsGitLab CI/CD Free
400 compute minutes/month per GitLab.com Free namespace on hosted instance runners
Runner cost factors vary; quota is shared across the namespace; extra compute minutes may need purchase.
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Ongoing free allowance
APIs & developer toolsCircleCI Free
30,000 credits/month; up to 5 active users; 1 GB network transfer and 2 GB-month storage
Free credits expire monthly and do not roll over; resource classes consume credits at different rates; personal builds stop when credits reach zero.
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