# Alternatives to Zoho ZeptoMail ZeptoMail is Zoho's purpose-built transactional email service, separate from its marketing tools, offering a REST API and SMTP relay for app-triggered emails such as receipts and password resets. It includes real-time delivery tracking, bounce/suppression handling, and dedicated IP options for high-volume senders. Zoho ZeptoMail ranks #9 of 12 in Transactional email APIs, with an Alt Score of 93. It is proprietary and available on the web. 12 of 12 checklist rows are verified against a public source. Source: https://altcatalog.com/alternatives/zeptomail/ Category: Transactional email APIs ## Overview - **Who it's for**: Developers and businesses that need to send automated, time-sensitive transactional emails triggered by user actions, such as OTPs, password resets, order confirmations, and account notifications, rather than marketing or bulk email. - **What you get**: A REST API and SMTP relay for sending transactional email, with pre-built and custom email templates, webhooks for delivery/open/click events, suppression list management, bounce and custom analytics reports, sender authentication (SPF/DKIM/DMARC), and an optional dedicated IP add-on. - **How it works**: Applications integrate either by connecting to ZeptoMail's SMTP server with account credentials or by calling its REST API (or one of its code libraries for languages including JavaScript, Python, PHP, C#, and Java) to submit emails, which are organized into segmented 'Agents' per client, application, or purpose and tracked through a web dashboard. Usage is metered through prepaid credits (1 credit = 10,000 emails, valid 6 months) rather than a monthly subscription. ## Profile - **License**: Proprietary (verified 2026-07-30) - **Pricing model**: Usage-based (verified 2026-07-30) - **Starts at**: Contact sales (verified 2026-08-03) - **Platforms**: Web - **Status**: active (verified 2026-07-30) ## Ranked alternatives | # | App | Alt Score | Licence | Platforms | |---|-----|-----------|---------|-----------| | 1 | [Elastic Email](https://altcatalog.com/alternatives/elastic-email.md) | 100 | ? | Web | | 2 | [MailerSend](https://altcatalog.com/alternatives/mailersend.md) | 100 | Proprietary | Web, iOS | | 3 | [Mailgun](https://altcatalog.com/alternatives/mailgun.md) | 100 | Proprietary | Web | | 4 | [Amazon SES](https://altcatalog.com/alternatives/amazon-ses.md) | 93 | Proprietary | Web | | 5 | [Mailtrap](https://altcatalog.com/alternatives/mailtrap.md) | 93 | Proprietary | ? | | 6 | [Resend](https://altcatalog.com/alternatives/resend.md) | 93 | Proprietary | Web | | 7 | [SMTP2GO](https://altcatalog.com/alternatives/smtp2go.md) | 93 | ? | Web | | 8 | [Twilio SendGrid](https://altcatalog.com/alternatives/sendgrid.md) | 93 | Proprietary | Web | | 9 | [Postmark](https://altcatalog.com/alternatives/postmark.md) | 85 | Proprietary | Web | | 10 | [useSend](https://altcatalog.com/alternatives/usesend.md) | 81 | AGPL-3.0 | Web | | 11 | [Postal](https://altcatalog.com/alternatives/postal.md) | 78 | MIT | Linux | Alt Score = Verified coverage (90%) + Visibility (10%). See https://altcatalog.com/how-alt-score-works/ ## Feature comparison Legend: Yes / No / Partial / ? (not verified). | Transactional email APIs checklist | Zoho ZeptoMail | Elastic Email | MailerSend | Mailgun | Amazon SES | Mailtrap | |---|---|---|---|---|---|---| | Pricing model | Usage-based | Freemium | Freemium | Freemium | Usage-based | Freemium | | Starts at | Contact sales | $19/mo | $7/mo | $15/mo | $0.10 per 1,000 emails | $15/mo | | License | Proprietary | ? | Proprietary | Proprietary | Proprietary | Proprietary | | Platforms | Web | Web | Web, iOS | Web | Web | ? | | REST API | Yes | Yes | Yes | Yes | Yes | Yes | | SMTP relay | Yes | Yes | Yes | Yes | Yes | Yes | | Deliverability tooling | Yes | Yes | Yes | Yes | Yes | Yes | | Templates | Yes | Yes | Yes | Yes | Yes | Yes | | Inbound email parsing | No | Yes | Yes | Yes | Yes | Yes | | Webhooks / events | Yes | Yes | Yes | Yes | Partial | Yes | | Suppression & bounce handling | Yes | Yes | Yes | Yes | Yes | Yes | | Dedicated IPs | Yes | Yes | Yes | Yes | Yes | Yes | | Analytics / logs | Yes | Yes | Yes | Yes | Yes | Yes | | SDKs | Yes | Yes | Yes | Yes | Yes | Yes | | EU data residency | Yes | Yes | Yes | Yes | Yes | No | | Free tier volume | Yes | Yes | Yes | Yes | Partial | Yes | ## Sources Sources for Zoho ZeptoMail. Each alternative is sourced on its own page. - **Pricing model**: Usage-based — (verified 2026-07-30) - Note: Sells prepaid email credits in bulk (1 credit = 10,000 emails, valid 6 months) rather than a recurring monthly seat/volume subscription; no long-term contract. - Quote: “Pay only for what you consume and only when you consume it.” - **Platforms**: Web — (verified 2026-07-30) - Note: No native desktop or mobile app found anywhere on the site; product is accessed via a web dashboard, REST API, and SMTP relay. - Quote: “Extensive dashboard — Overview of your account in a single glance” - **License**: Proprietary — (verified 2026-07-30) - Note: ZeptoMail is closed-source SaaS with no public LICENSE file; cited Zoho's general Terms of Service (same vendor domain) which restricts reverse-engineering/redistribution, consistent with proprietary - Quote: “attempt to disassemble, reverse engineer or decompile the Services” - **Status**: active — (verified 2026-07-30) - Note: Changelog lists shipped features through July 2026 (current month), including new developer APIs added in June 2026. - Quote: “Migrate from Resend to ZeptoMail” - **Starts at**: Contact sales — (verified 2026-08-03) - **REST API**: Yes — (verified 2026-07-30) - Note: https://zeptomail.zoho.com/v1.1/email" -X POST -H "Accept: application/json"" - Quote: “curl ” - **SMTP relay**: Yes — (verified 2026-07-30) - Quote: “Simple SMTP configuration allows you to plug ZeptoMail with any application or platform your business runs on.” - **Deliverability tooling**: Yes — (verified 2026-07-30) - Quote: “By isolating transactional email sending from marketing emails, ZeptoMail protects the sender reputation of all our shared IPs to ensure high deliverability.” - **Templates**: Yes — (verified 2026-07-30) - Quote: “ZeptoMail comes with customizable, pre-built email templates for some frequently sent transactional emails.” - **Inbound email parsing**: No — (verified 2026-07-30) - Note: Product scope is strictly outbound transactional sending (SMTP relay + REST API); no inbound routing/parsing capability is mentioned anywhere across the features, docs, or changelog pages reviewed. - Quote: “Zoho ZeptoMail is a dedicated transactional email service designed to deliver time-sensitive emails triggered by user actions” - **Webhooks / events**: Yes — (verified 2026-07-30) - Quote: “Configure webhooks to receive instant notification about bounce, click, and open events on your emails.” - **Suppression & bounce handling**: Yes — (verified 2026-07-30) - Quote: “You can add email addresses and domains that cause bounces to suppression list to ensure that email sending is blocked to them in the future.” - **Dedicated IPs**: Yes — (verified 2026-07-30) - Note: Sold as a monthly-priced, annually-billed add-on, available only in some data centers. - Quote: “certain businesses with high email volume might require a dedicated IP. It helps isolate your email reputation.” - **Analytics / logs**: Yes — (verified 2026-07-30) - Quote: “ZeptoMail provides you with in-depth reports like recipient activity overview, email open information, custom reports and bounce reports” - **SDKs**: Yes — (verified 2026-07-30) - Note: Page shows working code samples for cURL, JavaScript (npm package "zeptomail"), C#, Python, PHP, and Java. - Quote: “Experience hassle-free integration with ZeptoMail's email APIs using our code libraries in the programming language of your choice.” - **EU data residency**: Yes — (verified 2026-07-30) - Note: Data center location table: hosting region depends on the Zoho domain (US/EU/CN/IN/AU) the admin registered with; zeptomail.zoho.eu maps to the EU data center. - Quote: “zeptomail.zoho.eu | EU (European Union)” - **Free tier volume**: Yes — (verified 2026-07-30) - Note: One-time trial credit (10,000 emails / 1 credit), valid for 1 month — not a recurring monthly free tier. - Quote: “Learn the ropes with a free credit valid for 1 month. With this credit, you can send 10,000 free transactional emails from your account before you begin paying.” --- Ranked by verified data, never by who paid. https://altcatalog.com/trust/