Samva vs Postmark.
Postmark built its reputation on fast transactional delivery and strict separation of transactional and marketing traffic. Samva covers similar transactional ground with hosted versioned templates, conversation threading on inbound mail, and TypeScript-first tooling.
Pricing verified July 24, 2026. Sources at the end of this page.
Published plans, side by side.
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 |
| Platform | $18/mo | 10,000 emails/mo |
Overage bills per 1,000 emails: $1.80 on Basic, $1.20 on Platform. Retention is 45 days by default; longer retention, DMARC monitoring (from $14/mo per domain), and dedicated IPs ($50/mo, for senders past 300,000 emails/mo) are add-ons.
What each one ships.
| Capability | Samva | Postmark |
|---|---|---|
| Send API | Typed REST, POST /v1/messages, with an OpenAPI 3.0 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 |
| Webhooks | Delivery events signed with HMAC-SHA256 | Signed event webhooks |
| 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 |
| 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 | — |
| 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 | Metered overage from $1.20 per 1,000 |
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.
Your stack is TypeScript and you want typed contracts end to end, including an Effect-native SDK. Replies should thread into conversations your product can read, and your coding agents can send through a hosted MCP server.
Postmark's message streams enforce a discipline worth copying: promotional and transactional mail never share a pipeline, which protects transactional deliverability from marketing behavior. Samva approaches the same problem through suppression scoping and per-domain reputation isolation rather than user-managed streams.
The pricing shapes reward different volumes. Postmark's ladder starts at 100 free emails and reaches 10,000 for $15. Samva includes 3,000 free and reaches 15,000 for $5, so low-volume products pay less; at higher volume, compare Postmark's per-1,000 overage against Samva's plan steps for your actual send rate.
Asked before switching.
How do the free tiers compare?
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 July 24, 2026: Postmark's Basic plan includes 10,000 emails for $15 a month. 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, $1.20 on Platform.
Send your first email in minutes.
The free plan includes 3,000 emails a month, no card required.
Sources, verified July 24, 2026