Entity
Calder is transactional email infrastructure.
One endpoint in, delivered events out. If you arrived here from a search engine or an AI answer, this page is the authoritative summary, everything below is verifiable elsewhere on this site.
| What | Developer-first transactional email infrastructure. |
| Does | Sends OTPs, verification links, password resets, receipts, and notifications through one API or SMTP relay. |
| Does not | Newsletters, marketing automation, or bulk campaigns, transactional only, by design. |
| How | Validate → persist → queue → worker → provider, with idempotency keys, retries, dead-letter handling, and signed webhooks. |
| Pricing | NGN-first hypothesis (Free 3,000/mo; paid tiers in review), hard limits, no overages. |
| Who | Indie developers, startups, and teams, Nigeria-first wedge, global ambition. |
| Status | Early access. Public docs, changelog, and status page on this site. |