Email APIs · side by side
Klaviyo vs Robotomail
Compare Klaviyo, Robotomail 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
Robotomail
Klaviyo
Custom / not listed
Custom / unlisted usage pricing · 10K profiles
Robotomail
$19 / mo
Starter · 50 inboxes
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 | Robotomail |
|---|---|---|
| Provider | Klaviyo | Robotomail |
| Billing unit | profiles | inboxes |
| Plan at selected usage | Custom / unlisted usage pricing | Starter |
| Monthly estimate | Custom / not listed | $19/mo |
| Workload | 10K profiles | 50 inboxes |
| Free access | Limited free plan | Developer access varies |
| Published plans | Free | Free, Starter, Growth, Scale |
| Prices checked | 2026-10-08 | 2026-10-08 |
- Klaviyo
- Klaviyo
- Robotomail
- Robotomail
- Klaviyo
- profiles
- Robotomail
- inboxes
- Klaviyo
- Custom / unlisted usage pricing
- Robotomail
- Starter
- Klaviyo
- Custom / not listed
- Robotomail
- $19/mo
- Klaviyo
- 10K profiles
- Robotomail
- 50 inboxes
- Klaviyo
- Limited free plan
- Robotomail
- Developer access varies
- Klaviyo
- Free
- Robotomail
- Free, Starter, Growth, Scale
- Klaviyo
- 2026-10-08
- Robotomail
- 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.
Email APIs feature comparison
| Email APIs | Klaviyo | Robotomail |
|---|---|---|
| Support | Not listed | |
| Mailboxes | Not listed | 10 |
| Monthly sending per mailbox | Not listed | 15,000 |
| Daily per mailbox | Not listed | 500 |
| Monthly inbound | Not listed | 2,000 |
| Custom domains | Not listed | 1 |
| Storage | Not listed | 10 GB |
| Webhooks | Not listed | |
| SSE streaming | Not listed | |
| Dedicated IPs | Not listed | Not included — |
| MCP, CLI & API access | Not listed |
- Klaviyo
- Not listed
- Robotomail
- Klaviyo
- Not listed
- Robotomail
- 10
- Klaviyo
- Not listed
- Robotomail
- 15,000
- Klaviyo
- Not listed
- Robotomail
- 500
- Klaviyo
- Not listed
- Robotomail
- 2,000
- Klaviyo
- Not listed
- Robotomail
- 1
- Klaviyo
- Not listed
- Robotomail
- 10 GB
- Klaviyo
- Not listed
- Robotomail
- Klaviyo
- Not listed
- Robotomail
- Klaviyo
- Not listed
- Robotomail
- Not included —
- Klaviyo
- Not listed
- Robotomail
Which email providers fit your needs?
Klaviyo features & plan notes
- E-commerce data
- Omnichannel
- Shopify ecosystem
Robotomail features & plan notes
- Multi-tenant inboxes
- Event streaming
- Conversation threads
- 10 mailboxes
- 15,000 sends / month per mailbox
- 500 sends / day per mailbox
- 2,000 inbound / month
- 1 custom domain
- 10 GB storage
- Webhooks
- SSE streaming
- MCP, CLI & API access
- Email support
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