Email APIs · side by side
Klaviyo vs ZeptoMail
Compare Klaviyo, ZeptoMail by sending volume, delivery webhooks, inbound email, domain limits and retention.
Email APIs pricing calculator
These providers bill in different units. Each estimate uses its own workload; there is no same-volume price winner.
Klaviyo
ZeptoMail
Klaviyo
Custom / not listed
Custom / unlisted usage pricing · 10K profiles
ZeptoMail
$0 / mo
Pay As You Go · 0 emails
Listed USD plan fees and tracked usage only. Unlisted compute, transfer, extras, taxes and contract terms are excluded. Custom or unsupported plan usage is not estimated.
Email APIs overview & pricing
| Email APIs | Klaviyo | ZeptoMail |
|---|---|---|
| Provider | Klaviyo | Zoho Corporation |
| Billing unit | profiles | emails |
| Plan at selected usage | Custom / unlisted usage pricing | Pay As You Go |
| Monthly estimate | Custom / not listed | $0/mo |
| Workload | 10K profiles | 0 emails |
| Free access | Limited free plan | 10,000 free email credits on account signup, valid for 6 months |
| Published plans | Free | Pay As You Go, Custom Pricing |
| Prices checked | 2026-10-08 | 2026-10-08 |
- Klaviyo
- Klaviyo
- ZeptoMail
- Zoho Corporation
- Klaviyo
- profiles
- ZeptoMail
- emails
- Klaviyo
- Custom / unlisted usage pricing
- ZeptoMail
- Pay As You Go
- Klaviyo
- Custom / not listed
- ZeptoMail
- $0/mo
- Klaviyo
- 10K profiles
- ZeptoMail
- 0 emails
- Klaviyo
- Limited free plan
- ZeptoMail
- 10,000 free email credits on account signup, valid for 6 months
- Klaviyo
- Free
- ZeptoMail
- Pay As You Go, Custom Pricing
- Klaviyo
- 2026-10-08
- ZeptoMail
- 2026-10-08
Email APIs monthly cost
Different workloads, separate estimates
Separate transactional delivery from campaigns, outreach and agent inboxes. Compare monthly sends and daily caps; contacts, seats and inboxes are not sending allowances. Budget separately for dedicated IPs, validation and attachments.
Which email providers fit your needs?
Klaviyo features & plan notes
- E-commerce data
- Omnichannel
- Shopify ecosystem
ZeptoMail features & plan notes
- Exclusively transactional email sending to protect domain and IP reputation
- Credit-based pay-as-you-go pricing with no monthly subscription lock-in (credits valid for 6 months)
- Integration via RESTful APIs and SMTP relay with SDK support for multiple languages
- Comprehensive email logs, suppression list management, and delivery analytics
- All four channels (Email, SMS, WhatsApp, Voice) under one account
- No monthly minimums, subscriptions, or seat fees
- First credit is free (10,000 emails)
- 10,000 emails per email credit
- Email credits valid for 6 months
- Detailed logs and delivery reports across all channels
- Compliance-ready with multi-region data residency options
- Technical support at no extra cost
How to compare email providers
Separate transactional delivery from campaigns, outreach and agent inboxes. Compare monthly sends and daily caps; contacts, seats and inboxes are not sending allowances. Budget separately for dedicated IPs, validation and attachments.
Browse Email APIs pricing