Our take
Pick Resend if app teams who will stay on Transactional Free $0 (3,000 emails, 100/day, 3 inboxes, no card) while they send a first receipt, then buy Pro at $20/month when they need 50,000 emails and no daily cap — and add Marketing only when they have a list. Pick Unkey if aPI teams who will stay on API Management Free $0 (150k valid requests, 1k keys, no card) while they issue a first keyspace, then buy Pro at
API-key + deploy desk
Best for
Resend Email you start at $0 (3,000 transactional / month, 100/day)
Unkey Keys you start at $0 / 150k verifications, or Deploy from $5
Free plan
Resend $0 · 3,000 emails. 100/day cap. 3 domains. 3 inboxes. 10,000 automation runs (no overage). 30-day retention. Ticket support
Unkey $0 · /month. 150k valid requests. 1k API keys. 1-day logs. 3-day audit. Unlimited APIs
Lowest paid
Resend Pro $20/mo
Unkey Usage rates $0.000006944/mo
Next step up
Resend Pro marketing $40
Unkey Starter $5/mo
Watch out
Resend Free transactional is 100 emails/day
Unkey Free API Management is 150k valid requests and 1k keys
Last checked
Resend 2026-10-22 · resend.com/pricing
Unkey 2026-10-22 · unkey.com/pricing
app teams who will stay on Transactional Free $0 (3,000 emails, 100/day, 3 inboxes, no card) while they send a first receipt, then buy Pro at $20/month when they need 50,000 emails and no daily cap — and add Marketing only when they have a list.
Read the Resend pageaPI teams who will stay on API Management Free $0 (150k valid requests, 1k keys, no card) while they issue a first keyspace, then buy Pro at $25/month when they need 250k requests and team workspaces — or start Deploy Starter at $5 when they also want the container host.
Read the Unkey page