Infisical vs Postmark
Open-source secrets, PKI and SSH — self-hostable Doppler/Vault alternative
vs. Reliable transactional email with fast delivery
Pricing tiers
Infisical
Free (Cloud)
$0. Unlimited users. 5 projects. 30-day audit. Community support.
Free
Self-Host CE (OSS)
Free forever. MIT license. Core features free. Docker Compose.
$0 base (usage-based)
Pro
$18/user/mo. Unlimited projects, secret rotation, dynamic secrets, 90-day audit, Slack alerts.
$18/mo
Enterprise
Custom. SAML, SCIM, SLA, dedicated deploy, HIPAA-ready, audit 1yr+.
Custom
Self-Host EE (BSL)
Custom. BSL-licensed enterprise features for self-hosted deploys.
Custom
Postmark
Free
100 emails/month forever. No credit card. Side projects and testing.
Free
Basic — 10k
10,000 emails/month. Overage $1.80/1k. Unlimited emails/day.
$15/mo
Pro — 10k
10,000 emails/month. Overage $1.30/1k. Inbound email + message streams.
$17/mo
Platform — 10k
10,000 emails/month. Overage $1.20/1k. Team collab, more domains.
$18/mo
Enterprise (>1.5M)
Custom for senders exceeding 1.5M/month.
Custom
Free-tier quotas head-to-head
Comparing free on Infisical vs free on Postmark.
| Metric | Infisical | Postmark |
|---|---|---|
| No overlapping quota metrics for these tiers. | ||
Features
Infisical · 18 features
- Approval Policies — PR-style approvals.
- Audit Log — Full activity trail.
- Dynamic Secrets — Generate on-demand creds.
- E2E Encryption — Optional zero-knowledge mode.
- Environments — Multi-env (dev/staging/prod).
- Infisical Agent — Sidecar for secret injection.
- Infisical CLI — Command-line access.
- Kubernetes Operator — Native K8s controller.
- PKI (Certificates) — Private CA + cert lifecycle.
- RBAC — Roles + permissions.
- SCIM — User provisioning.
- Secret Rotation — Auto-rotate keys.
- Secrets Management — Core secret storage.
- Secret Sync — Sync to cloud/hosting.
- Self-Host (CE + EE) — Docker / Helm / AMI.
- SSH — Ephemeral SSH access.
- SSO (SAML) — Enterprise auth.
- Webhooks — Change events.
Postmark · 12 features
- Activity Search — Full-text search over sent messages for 45-365 days.
- Bounce Handling — Automatic hard/soft bounce detection + suppression management.
- Broadcast Messages — Via separate Broadcast Message Stream. Bulk sends with throttling.
- DKIM + SPF — One-click verification + auto-renewal of DKIM keys.
- Inbound Email — Route inbound emails to your webhook. Parse attachments, threads.
- Message Streams — Isolate transactional from marketing for separate deliverability reputation.
- Open + Click Tracking — Configurable at template or send level.
- Raw API Access — 100+ endpoints for bounces, servers, tags, templates, stats.
- Servers — Multi-tenant isolation: each "server" has its own API token + reputation.
- Templates — Mustachio template language with variables, alias + versioning.
- Transactional Send — Reliable API for password resets, receipts, notifications. Sub-10s delivery.
- Webhook Events — Delivery, bounce, spam complaint, open, click, subscription change.
Developer interfaces
| Kind | Infisical | Postmark |
|---|---|---|
| CLI | infisical CLI | — |
| SDK | infisical-python, @infisical/sdk | postmark-dotnet, postmarker (Python), postmark-go, postmark (Node), postmark-php, postmark-rails |
| REST | Infisical REST API | Postmark REST API |
| OTHER | Infisical Agent, Infisical Dashboard, Kubernetes Operator, Self-Host (Docker) | Inbound Email, SMTP Relay, Webhooks |
Staxly is an independent catalog of developer platforms. Some links to Infisical and Postmark may be affiliate links — Staxly may earn a commission if you sign up through them, at no extra cost to you. Pricing is verified against vendor pages at publication time — reconfirm before buying.
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