MailsSetu
MailsSetu is a developer-first transactional email API and SMTP platform for production messaging.
What MailsSetu is
MailsSetu is a developer-first transactional email API and SMTP platform for production messaging. It offers web and API access, beginning new accounts with a sandbox TEST key whose messages create logs but do not reach real inboxes. For live delivery, the maker recommends a verified sending domain with DKIM, SPF, and DMARC configured. The platform provides real-time logs, open and click tracking, bounce alerts, and a message timeline. Reusable templates support Handlebars-style variables and API references. Event webhooks cover delivery, open, click, bounce, and complaint events, with endpoint management, secret rotation, and failure replay. Official SDKs are listed for Node.js/TypeScript, Python, PHP, Go, Java, Ruby, and .NET. Plans range from Free at no cost for 3,000 emails/month to Growth at ₹1,199 a month for 3,00,000 emails/month. It is not a bulk marketing or newsletter platform.
Good
- Sandbox TEST key for safe testing
- Real-time logs and message timeline
- Event webhooks with replay
- Reusable Handlebars-style templates
- Official SDKs across several languages
Watch out
- Free plan excludes webhooks
- Over-quota sends fail without credits
- Not for bulk marketing or newsletters
- Live sending needs domain authentication
Who it suits
MailsSetu suits developers, product teams, agencies, WordPress and Shopify installations, and AI agents sending transactional messages. Its sandbox also fits teams that need delivery testing before live sending.
Verdict
MailsSetu combines transactional API and SMTP delivery with logs, templates, SDKs, and event webhooks. Check plan quotas and webhook availability, especially if your workflow depends on events or sends beyond the monthly allowance.
Plans and prices
From MailsSetu's own pricing page, checked 8 Oct 2026.
| Plan | Price | What it gives you |
|---|---|---|
| Free | Free | 3,000 emails/month · Sandbox testing · API and dashboard access |
| Starter | ₹399 a month | 60,000 emails/month · Live sending and operational logs · API and dashboard access · Monthly |
| Credits | ₹799, paid once | 1,00,000 emails · Overflow after monthly quota is exhausted · One-time purchase; credits never expire |
| Growth | ₹1,199 a month | 3,00,000 emails/month · Live sending and operational logs · Priority support and advanced controls · Monthly |
The facts
Each one read from MailsSetu's own pages, with the date it was checked.
What it does
- Audience and location
- The site says MailsSetu is built for developers, product teams, agencies, WordPress and Shopify installs, and AI agents, and lists Mumbai, Maharashtra, India.checked 8 Oct 2026
- Automation integrations
- Zapier, Make, and n8n are marked as coming soon on the integrations page.checked 8 Oct 2026
- Delivery visibility
- The platform provides real-time logs, open and click tracking, bounce alerts, and a message timeline.checked 8 Oct 2026
- Domain setup
- The maker recommends a verified sending domain with DKIM, SPF, and DMARC setup before live sending.checked 8 Oct 2026
- Integrations
- Official SDKs are listed for Node.js/TypeScript, Python, PHP, Go, Java, Ruby, and .NET, alongside framework and platform guides.checked 8 Oct 2026
- Notable limit
- MailsSetu describes itself as a transactional email service and says it is not a bulk marketing or newsletter platform.checked 8 Oct 2026
- Product
- MailsSetu is a developer-first transactional email API and SMTP platform for production messaging.checked 8 Oct 2026
- Sandbox
- New accounts receive a sandbox TEST key, and sandbox sends create logs but do not reach real inboxes.checked 8 Oct 2026
- Security
- The security page describes scoped, rotatable API keys, server-side credential use, CSRF protection, key hashing, and signed webhook deliveries.checked 8 Oct 2026
- Support
- The site lists support by email at [email protected] with replies during IST business hours.checked 8 Oct 2026
- Templates
- Users can create reusable email templates with Handlebars-style variables and reference them through the API.checked 8 Oct 2026
- Webhooks
- MailsSetu supports event webhooks for delivery, open, click, bounce, and complaint events, with endpoint management, secret rotation, and failure replay.checked 8 Oct 2026
The company
- Founded
- 2023checked 28 Sep 2026
- Headquarters
- Mumbai, Maharashtra, Indiachecked 28 Sep 2026
Money
- Plan limits
- The pricing comparison says webhooks are not included in Free, organizations are included only in Growth, and sends beyond quota fail unless credits are available.checked 8 Oct 2026
Alternatives to MailsSetu
- 1
Mailchimp
Free planAndroidiOSWebAPI8.3From $13 a month - 2
turboSMTP
Free planAndroidiOSWebAPI8.2From €14.95 a month - 3
ReachMail
Free planAndroidiOSWebAPI8.1From $8 a month - 4
MailerSend
Free planiOSWebAPI7.8From $7 a month - 5
EmailSuccess
Free planWebAPImacOSSelf-hosted7.7From €4,000 a year - 6
Postmark
Free planWebAPI7.6Free plan