Email APIs · side by side
Mails.ai vs SparkPost
Compare Mails.ai, 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.
Mails.ai
SparkPost
Mails.ai
$0 / mo
Free · 0 sends
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 | Mails.ai | SparkPost |
|---|---|---|
| Provider | Mails.ai | Bird |
| Billing unit | sends | emails |
| Plan at selected usage | Free | Growth |
| Monthly estimate | $0/mo | $80/mo |
| Workload | 0 sends | 100K emails |
| Free access | 3,000 events/month, 1 agent, sending via workspace subdomain, MCP server access, and SDKs with no credit card required | Trial availability varies |
| Published plans | Free, Pro, Scale | Free, Startup, Growth, Enterprise |
| Prices checked | 2026-10-08 | 2026-10-08 |
- Mails.ai
- Mails.ai
- SparkPost
- Bird
- Mails.ai
- sends
- SparkPost
- emails
- Mails.ai
- Free
- SparkPost
- Growth
- Mails.ai
- $0/mo
- SparkPost
- $80/mo
- Mails.ai
- 0 sends
- SparkPost
- 100K emails
- Mails.ai
- 3,000 events/month, 1 agent, sending via workspace subdomain, MCP server access, and SDKs with no credit card required
- SparkPost
- Trial availability varies
- Mails.ai
- Free, Pro, Scale
- SparkPost
- Free, Startup, Growth, Enterprise
- Mails.ai
- 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 | Mails.ai | SparkPost |
|---|---|---|
| Sending domains | Not listed | 1,000 |
| Emails / month | Not listed | 100K to 2.5M |
| Webhook endpoints | Not listed | 10 |
| Sending IP | Not listed | Dedicated IPs (add-on) |
- Mails.ai
- Not listed
- SparkPost
- 1,000
- Mails.ai
- Not listed
- SparkPost
- 100K to 2.5M
- Mails.ai
- Not listed
- SparkPost
- 10
- Mails.ai
- Not listed
- SparkPost
- Dedicated IPs (add-on)
Which email providers fit your needs?
Mails.ai features & plan notes
- Inbound email parsing delivered as structured JSON with automatic prompt-injection detection
- Automatic email thread reconstruction and conversation handling via REST, SSE, or webhooks
- Native Model Context Protocol (MCP) server support alongside TypeScript and Python SDKs
- Per-agent reputation monitoring and send limits with cold outreach enforcement
- 3,000 events / month
- 1 agent
- TypeScript + Python SDKs, REST
- MCP server
- Magic-link signup, no card
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