Email APIs · side by side
Klaviyo vs Smartlead
Compare Klaviyo, Smartlead 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
Smartlead
Klaviyo
Custom / not listed
Custom / unlisted usage pricing · 10K profiles
Smartlead
$94 / mo
Pro · 10K leads
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 | Smartlead |
|---|---|---|
| Provider | Klaviyo | Smartlead |
| Billing unit | profiles | leads |
| Plan at selected usage | Custom / unlisted usage pricing | Pro |
| Monthly estimate | Custom / not listed | $94/mo |
| Workload | 10K profiles | 10K leads |
| Free access | Limited free plan | Trial |
| Published plans | Free | Base, Pro, Unlimited Smart, Unlimited Prime, SmartServices Growth, SmartServices Scale |
| Prices checked | 2026-10-08 | 2026-10-08 |
- Klaviyo
- Klaviyo
- Smartlead
- Smartlead
- Klaviyo
- profiles
- Smartlead
- leads
- Klaviyo
- Custom / unlisted usage pricing
- Smartlead
- Pro
- Klaviyo
- Custom / not listed
- Smartlead
- $94/mo
- Klaviyo
- 10K profiles
- Smartlead
- 10K leads
- Klaviyo
- Limited free plan
- Smartlead
- Trial
- Klaviyo
- Free
- Smartlead
- Base, Pro, Unlimited Smart, Unlimited Prime, SmartServices Growth, SmartServices Scale
- Klaviyo
- 2026-10-08
- Smartlead
- 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
Smartlead features & plan notes
- Multiple sending accounts
- Lead routing
- Master inbox
- 30,000 contacts
- 90,000 Email sends
- 30,000 Verified Emails
- Warmup Pool: Growth tier (Add-on $59/month)
- Unlimited email accounts
- CRM Access: Add-on @$39
- Clients / Workspace: Add-on @$29
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