Email APIs · side by side
AgentMail vs Plunk
Compare AgentMail, Plunk 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.
AgentMail
Plunk
AgentMail
Custom / not listed
Custom / unlisted usage pricing · 50 inboxes
Plunk
Custom / not listed
No priced plan for this volume · 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 | AgentMail | Plunk |
|---|---|---|
| Provider | AgentMail | Plunk |
| Billing unit | inboxes | emails |
| Plan at selected usage | Custom / unlisted usage pricing | No priced plan for this volume |
| Monthly estimate | Custom / not listed | Custom / not listed |
| Workload | 50 inboxes | 100K emails |
| Free access | Developer access varies | Developer free allowance |
| Published plans | Not listed | Pay as you grow, Free forever |
| Prices checked | Not listed | 2026-10-08 |
- AgentMail
- AgentMail
- Plunk
- Plunk
- AgentMail
- inboxes
- Plunk
- emails
- AgentMail
- Custom / unlisted usage pricing
- Plunk
- No priced plan for this volume
- AgentMail
- Custom / not listed
- Plunk
- Custom / not listed
- AgentMail
- 50 inboxes
- Plunk
- 100K emails
- AgentMail
- Developer access varies
- Plunk
- Developer free allowance
- AgentMail
- Not listed
- Plunk
- Pay as you grow, Free forever
- AgentMail
- Not listed
- Plunk
- 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 | AgentMail | Plunk |
|---|---|---|
| Sending methods | Not listed | Not listed |
| Inbound processing | Not listed | Not listed |
| Sending domains | Not listed | Not listed |
| Activity retention | Not listed | Not listed |
| Webhooks & events | Not listed | Not listed |
| Dedicated IP | Not listed | Not listed |
| Single sign-on | Not listed | Not listed |
| Support | Not listed | Not listed |
- AgentMail
- Not listed
- Plunk
- Not listed
- AgentMail
- Not listed
- Plunk
- Not listed
- AgentMail
- Not listed
- Plunk
- Not listed
- AgentMail
- Not listed
- Plunk
- Not listed
- AgentMail
- Not listed
- Plunk
- Not listed
- AgentMail
- Not listed
- Plunk
- Not listed
- AgentMail
- Not listed
- Plunk
- Not listed
- AgentMail
- Not listed
- Plunk
- Not listed
Which email providers fit your needs?
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