Sentroy replaces Resend, Postmark, Mailgun (transactional email), AWS S3 + Cloudflare R2 (object storage + CDN), Auth0, Clerk, Firebase Auth (auth-as-a-service), and Doppler, Infisical (env + secrets vault) with one SDK, one dashboard, one bill. Self-hostable, S3-compatible, open APIs.
If you are using…
Transactional email
Resend, Postmark, Mailgun, SendGrid alternative
Object storage + CDN
AWS S3, Cloudflare R2, Backblaze B2 alternative
Auth-as-a-service
Firebase Auth, Auth0, Clerk, Supabase Auth alternative
Env vault + secrets
Doppler, Infisical, AWS Secrets Manager alternative
Why Sentroy
The infrastructure headache is over. Ship email features with confidence.
Auto DKIM, SPF and DMARC setup. Reach the inbox, not the spam folder.
Send from your own domain with BIMI logo support and one-click DNS setup.
Automatic bounce handling, suppression lists, and complaint loops keep your score healthy.
Real-time opens, clicks, bounces and webhook events — not just a number on a dashboard.
By the numbers
Real numbers from real customers. No cherry-picked vanity metrics.
Inbox placement
Measured across top mailbox providers
Emails delivered
Since launch, and still counting
P95 send latency
From API call to SMTP handoff
API uptime
Rolling 90-day average
Activity
Every send, open, click, and bounce streams into real-time dashboards and webhooks. Spot problems before your users do.
For developers
Official SDKs for TypeScript, Go, Python and PHP — or call our REST API from any language.
Also available for Go, Python and PHP. View API docs
import { Sentroy } from "@sentroy-co/client-sdk"
const sentroy = new Sentroy({
baseUrl: "https://sentroy.com",
companySlug: "my-company",
accessToken: "stk_..."
})
await sentroy.send.email({
to: "user@example.com",
from: "noreply@yourcompany.com",
subject: "Verify your email",
domainId: "your-domain-id",
templateId: "email-verification",
lang: "en",
variables: { name: "John", code: "482901" }
})FAQ
Still have questions? We're a message away.
Free tier includes 1,000 emails per month. No credit card, no commitment.
Takes less than 2 minutes
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