Zepto
ZeptoMail is a transactional email delivery service by Zoho offering SMTP relay and a REST API for sending OTPs, invoices, and notifications reliably to the inbox.
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✓ Free plan available
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⚡ At a glance
Best for: Developers and small-to-mid businesses needing reliable transactional email delivery at competitive pricing
✓ Backed by Zoho's decade-long email hosting experience, lending strong deliverability credentials
✗ No built-in marketing or bulk email features — strictly transactional, so teams needing both must use a separate tool
An honest editorial snapshot from this tool's profile — not a paid placement.
ZeptoMail, built by the team behind Zoho Mail, provides a dedicated transactional email infrastructure focused solely on triggered emails like welcome messages, OTPs, and billing notifications. It supports both SMTP relay for legacy systems and a modern REST-based email sending API with SDKs for Node.js, Python, PHP, and C#. The service emphasizes inbox deliverability, detailed analytics, and per-use pricing that can be cost-effective for low-to-medium volume senders.
Best for: Developers and small-to-mid businesses needing reliable transactional email delivery at competitive pricing
Key Features
- SMTP relay for legacy application integration
- REST-based email sending API with multi-language SDKs
- Dedicated transactional email infrastructure (no marketing email mixing)
- Detailed delivery analytics and reports
- Support for single and batch email sending
- Mail agents for isolating email streams
- Domain authentication (SPF, DKIM, DMARC)
- Email open and click tracking
- Transactional SMS (upcoming/waitlist)
How to use Zepto
- Sign up for a Zoho ZeptoMail account (free credit included)
- Verify and add your sending domain
- Generate your Mail Agent API key or SMTP credentials
- Send a test transactional email via API or SMTP
- Check delivery logs in the dashboard
Pros
- Backed by Zoho's decade-long email hosting experience, lending strong deliverability credentials
- Supports both SMTP relay and API, making migration from other services straightforward
- Per-email credit pricing model can be more cost-effective than subscription plans for variable-volume senders
- Mail agents allow isolation of different transactional email streams for better monitoring
- Competitive pricing praised by users vs. alternatives like SendGrid or Mailgun
Cons
- No built-in marketing or bulk email features — strictly transactional, so teams needing both must use a separate tool
- Smaller ecosystem and community compared to market leaders like SendGrid or AWS SES
- Documentation and onboarding resources are less comprehensive than major competitors
- Transactional SMS is not yet live (waitlist only), limiting multi-channel use cases
- Primarily India-centric customer base and support orientation, which may raise concerns for global enterprises
- Free tier credits are limited and not clearly detailed on the public pricing page
Pricing Details
| Pricing type | Freemium |
| Starting at | Free (limited credits) |
| Free plan | ✅ Available |
| Free trial | no |
Zepto Pricing
Zepto pricing — 3 plans: Free ($0 (1 free credit = 10,000 emails, valid 1 month)) · Pay-as-you-go ($2.50 per credit (1 credit = 10,000 emails), no monthly fee) · Enterprise (Custom). Compare monthly and yearly costs below.
🔎 Prices verified Jul 2026 · View live pricing →
⚠️ Pay-as-you-go pricing (no monthly plans); credits valid 6 months; local taxes added.
Free
$0 (1 free credit = 10,000 emails, valid 1 month)
$0 (1 free credit = 10,000 emails, valid 1 month)
- ✓ 10,000 free transactional emails (1 credit)
- ✓ Email API & SMTP
- ✓ Dashboard, logs & tracking
- ✓ Pre-built templates
Pay-as-you-go
$2.50 per credit (1 credit = 10,000 emails), no monthly fee
$2.50 per credit (1 credit = 10,000 emails), no monthly fee
- ✓ Pay only for what you send, credits valid 6 months
- ✓ No hidden costs, no long-term contract
- ✓ Full dashboard, API, SMTP, webhooks, dedicated IP add-on
- ✓ Auto top-up available
Enterprise
Custom
Custom
- ✓ Custom volume pricing for high-volume senders
- ✓ Dedicated IP add-on: $30/mo billed annually
- ✓ 24/7 email & call support
- ✓ Contact sales for a custom quote
See Current Pricing →
Pricing may change — always verify on the official site.
- Sending OTPs and authentication emails from web or mobile apps
- Delivering invoices, billing notifications, and account alerts
- Migrating legacy SMTP-based systems to a managed transactional email service
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| Rating | ★★★★☆ 3.9 | ★★★½☆ 3.6 | ★★★½☆ 3.3 | ★★★½☆ 3.3 |
| Trust Score | 78/100 | 66/100 | 54/100 | 60/100 |
| Pricing |
Free
$0
Pay-as-you-go
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Enterprise
Custom |
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Standard
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Pro
from $59/mo |
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Essentials
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Premium
From $350/mo |
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| Data updated | 1 month ago | 1 month ago | 1 month ago | 1 month ago |
| Try → | Compare → | Compare → | Compare → |
About Trust Score
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