Samva vs Postmark
Postmark splits transactional and broadcast traffic into message streams. Samva covers the same transactional job with hosted versioned templates, inbound threading, and TypeScript-first tooling. The free tiers are 100 emails a month on Postmark and 3,000 on Samva.
Pricing verified August 16, 2026. Sources at the end of this page.
What Postmark charges next to Samva
Samva
| Plan | Price | Included |
|---|---|---|
| Free | $0 | 3,000 emails/mo |
| Starter | $5/mo | 15,000 emails/mo |
| Growth | $19/mo | 50,000 emails/mo |
| Scale | $99/mo | 300,000 emails/mo |
Sending, templates, inbound, and webhooks ship on every plan. On paid plans, extra emails past the allowance cost $0.50 per 1,000, under a $50 monthly spend limit you control. Free stops at its allowance.
Postmark
| Plan | Price | Included |
|---|---|---|
| Free (Developer) | $0 | 100 emails/mo |
| Basic | $15/mo | 10,000 emails/mo |
| Pro | $16.50/mo | 10,000 emails/mo |
| Platform | $18/mo | 10,000 emails/mo |
Overage bills per 1,000 emails: $1.80 on Basic, $1.30 on Pro, and $1.20 on Platform. Inbound email processing starts on Pro. Retention is 45 days by default, with configurable retention up to 365 days on Pro and Platform.
What each one ships.
Send and receive
How you send email, build templates, and bring replies back.
| Capability | Samva | Postmark |
|---|---|---|
| Send API | Typed REST, POST /v1/messages, with an OpenAPI 3.1.0 spec | REST API and SMTP, with a batch API |
| Templates | Versioned templates with rollback and publish history | Responsive templates with an editor and import tool |
| Inbound email | Inbound parsing with conversation threading per recipient | Inbound parsing to JSON with webhook delivery on Pro and Platform |
- Send API
Samva
Typed REST, POST /v1/messages, with an OpenAPI 3.1.0 spec
Postmark
REST API and SMTP, with a batch API
- Templates
Samva
Versioned templates with rollback and publish history
Postmark
Responsive templates with an editor and import tool
- Inbound email
Samva
Inbound parsing with conversation threading per recipient
Postmark
Inbound parsing to JSON with webhook delivery on Pro and Platform
Delivery and visibility
How you follow delivery, observe engagement, and protect your sending.
| Capability | Samva | Postmark |
|---|---|---|
| Webhooks | Delivery events signed with HMAC-SHA256 | Event webhooks protected with HTTP Basic Auth and IP allowlisting; no HMAC signature verification |
| Open and click telemetry | Per-message timeline of provider-observed opens and clicks | Open and click tracking |
| Deliverability | SPF, DKIM, and DMARC on your domain; bounces and complaints suppressed automatically | DKIM, SPF, and DMARC; automatic and manual suppressions; vetted shared IPs |
- Webhooks
Samva
Delivery events signed with HMAC-SHA256
Postmark
Event webhooks protected with HTTP Basic Auth and IP allowlisting; no HMAC signature verification
- Open and click telemetry
Samva
Per-message timeline of provider-observed opens and clicks
Postmark
Open and click tracking
- Deliverability
Samva
SPF, DKIM, and DMARC on your domain; bounces and complaints suppressed automatically
Postmark
DKIM, SPF, and DMARC; automatic and manual suppressions; vetted shared IPs
Integration tools
The SDKs and agent tools you can build with.
| Capability | Samva | Postmark |
|---|---|---|
| SDKs | TypeScript SDK plus an Effect-native SDK | Official libraries for Node.js, Python, Ruby, PHP, C#, and more |
| Agent tooling | Hosted MCP server and a CLI with device-flow login | Postmark Skills, hosted MCP server, and CLI |
- SDKs
Samva
TypeScript SDK plus an Effect-native SDK
Postmark
Official libraries for Node.js, Python, Ruby, PHP, C#, and more
- Agent tooling
Samva
Hosted MCP server and a CLI with device-flow login
Postmark
Postmark Skills, hosted MCP server, and CLI
Volume and billing
What you can send for free and how extra volume is billed.
| Capability | Samva | Postmark |
|---|---|---|
| Free tier | 3,000 emails a month; 1,000 a day with a card on file, 100 without | 100 emails a month, never expires |
| Past the allowance | Metered at $0.50 per 1,000, under a spend limit you set | $1.80 per 1,000 on Basic, $1.30 on Pro, and $1.20 on Platform |
- Free tier
Samva
3,000 emails a month; 1,000 a day with a card on file, 100 without
Postmark
100 emails a month, never expires
- Past the allowance
Samva
Metered at $0.50 per 1,000, under a spend limit you set
Postmark
$1.80 per 1,000 on Basic, $1.30 on Pro, and $1.20 on Platform
Strictly separated transactional and broadcast message streams are your top priority, you want a mature template editor with an import tool, or your team sends from many languages with official libraries.
You want 3,000 free emails instead of 100, HMAC-signed webhooks, and inbound threading on every plan. Postmark inbound starts on Pro. Samva Starter includes 15,000 emails for $5; Postmark Basic includes 10,000 for $15.
Postmark's message streams keep promotional and transactional mail in separate pipelines. Samva scopes suppression and reputation to each of your sending domains, with no streams to manage.
The ladders reward different volumes. Postmark starts at 100 free emails and reaches 10,000 for $15 on Basic. Pro adds inbound processing and configurable retention for $16.50. Samva includes 3,000 free and reaches 15,000 for $5. At higher volume, compare Postmark's per-1,000 overage against Samva's plan steps for your actual send rate.
Questions before you move.
What do I get for free?
Postmark's Developer plan includes 100 emails a month and never expires; overages aren't allowed on it. Samva's free plan includes 3,000 emails a month, capped at 1,000 a day with a card on file and 100 a day without one.
What does 10,000 emails a month cost?
On plans published as of August 16, 2026: Postmark's Basic plan includes 10,000 emails for $15 a month. Pro includes 10,000 for $16.50, and Platform includes 10,000 for $18. Samva's Starter plan includes 15,000 emails for $5 a month.
What happens when I send past my plan?
On Samva, extra emails cost $0.50 per 1,000, billed to the exact count, under a $50 monthly spend limit you can raise, lower, or pause. Postmark meters overage per 1,000 emails: $1.80 on Basic, $1.30 on Pro, and $1.20 on Platform.
Start on 3,000 emails, free.
No card required. Then pay for the volume you send.