Email APIs · side by side
Robotomail vs SparkPost
Compare Robotomail, SparkPost 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.
Robotomail
SparkPost
Robotomail
$19 / mo
Starter · 50 inboxes
SparkPost
$80 / mo
Growth · 100K 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 | Robotomail | SparkPost |
|---|---|---|
| Provider | Robotomail | Bird |
| Billing unit | inboxes | emails |
| Plan at selected usage | Starter | Growth |
| Monthly estimate | $19/mo | $80/mo |
| Workload | 50 inboxes | 100K emails |
| Free access | Developer access varies | Trial availability varies |
| Published plans | Free, Starter, Growth, Scale | Free, Startup, Growth, Enterprise |
| Prices checked | 2026-10-08 | 2026-10-08 |
- Robotomail
- Robotomail
- SparkPost
- Bird
- Robotomail
- inboxes
- SparkPost
- emails
- Robotomail
- Starter
- SparkPost
- Growth
- Robotomail
- $19/mo
- SparkPost
- $80/mo
- Robotomail
- 50 inboxes
- SparkPost
- 100K emails
- Robotomail
- Developer access varies
- SparkPost
- Trial availability varies
- Robotomail
- Free, Starter, Growth, Scale
- SparkPost
- Free, Startup, Growth, Enterprise
- Robotomail
- 2026-10-08
- SparkPost
- 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 | Robotomail | SparkPost |
|---|---|---|
| Sending domains | Not listed | 1,000 |
| Support | Not listed | |
| Mailboxes | 10 | Not listed |
| Monthly sending per mailbox | 15,000 | Not listed |
| Daily per mailbox | 500 | Not listed |
| Monthly inbound | 2,000 | Not listed |
| Custom domains | 1 | Not listed |
| Storage | 10 GB | Not listed |
| Webhooks | Not listed | |
| SSE streaming | Not listed | |
| Dedicated IPs | Not included — | Not listed |
| MCP, CLI & API access | Not listed | |
| Emails / month | Not listed | 100K to 2.5M |
| Webhook endpoints | Not listed | 10 |
| Sending IP | Not listed | Dedicated IPs (add-on) |
- Robotomail
- Not listed
- SparkPost
- 1,000
- Robotomail
- SparkPost
- Not listed
- Robotomail
- 10
- SparkPost
- Not listed
- Robotomail
- 15,000
- SparkPost
- Not listed
- Robotomail
- 500
- SparkPost
- Not listed
- Robotomail
- 2,000
- SparkPost
- Not listed
- Robotomail
- 1
- SparkPost
- Not listed
- Robotomail
- 10 GB
- SparkPost
- Not listed
- Robotomail
- SparkPost
- Not listed
- Robotomail
- SparkPost
- Not listed
- Robotomail
- Not included —
- SparkPost
- Not listed
- Robotomail
- SparkPost
- Not listed
- Robotomail
- Not listed
- SparkPost
- 100K to 2.5M
- Robotomail
- Not listed
- SparkPost
- 10
- Robotomail
- Not listed
- SparkPost
- Dedicated IPs (add-on)
Which email providers fit your needs?
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
SparkPost features & plan notes
- Deliverability analytics
- Enterprise scale
- Predictive signals
- 10 webhook endpoints
- 1,000 sending domains
- Dedicated IPs (add-on)
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