Polar vs Courier
Merchant of Record for devs — usage-based billing, MoR, 4% + 40¢
vs. Notification API with multi-channel orchestration, templates, and preferences
Pricing tiers
Polar
Pay-as-you-go
4% + 40¢ per transaction. Cheapest Merchant-of-Record. No monthly or setup fees.
$0 base (usage-based)
Enterprise
Custom. Volume discounts for high-growth teams.
Custom
Courier
Free
Up to 10,000 notifications/month. All channels. Community support.
Free
Business
From $99/mo. Higher volumes, advanced routing, preference center, branding removal.
$99/mo
Enterprise
Custom. SOC 2, SSO, dedicated support, volume discounts, SLA.
Custom
Free-tier quotas head-to-head
Comparing payg on Polar vs free on Courier.
| Metric | Polar | Courier |
|---|---|---|
| notifications monthly | — | 10000 notifications/mo |
Features
Polar · 15 features
- Customer Portal — Self-serve subscription management.
- Feature Flags — Simple flag mgmt tied to subscription tiers.
- Framework Adapters — Next.js, BetterAuth, TS, Python, Laravel, Ruby, 11+ more.
- Fraud Protection — Chargeback + fraud handling included.
- GitHub Sponsors Import — Import existing sponsors to Polar.
- Global Tax Compliance — VAT/GST/sales tax filed by Polar.
- Hosted Checkout — Polar-hosted + embeddable checkout.
- License Keys — Generate + validate license keys for software.
- Metering — Track API calls, tokens, custom units.
- One-off Purchases — Single purchases + digital downloads.
- Open-Source Backend — Full platform code on GitHub.
- Sandbox Environment — Test transactions without charging.
- Subscriptions — Tiered plans with upgrades/downgrades.
- Usage-Based Billing — Event ingestion → meter → invoice.
- Webhooks — Resource events with HMAC signatures.
Courier · 13 features
- Chat — Slack, Microsoft Teams, Discord, Mattermost.
- Email — SendGrid, Postmark, Mailgun, AWS SES, Resend, SMTP.
- Inbox (In-App) — React/JS drop-in in-app inbox component.
- Lists — Segment recipients for bulk notification sends.
- Logs + Analytics — Per-message delivery timeline + engagement.
- Multi-channel Routing — Provider failover + preferred channel per user.
- Notification Designer — Visual editor for templates across channels.
- Preferences — Per-user notification preferences hub.
- Push — APNs, FCM, Expo, OneSignal.
- Send API — POST /send with template + recipients + data.
- SMS — Twilio, MessageBird, Vonage, Plivo, Telnyx.
- Templates + Versioning — Template brands, variants, localization, version history.
- Webhooks — Delivery + engagement event webhooks.
Developer interfaces
| Kind | Polar | Courier |
|---|---|---|
| CLI | — | Courier CLI |
| SDK | polar-sdk-python, @polar-sh/better-auth, @polar-sh/nextjs, @polar-sh/sdk | courier-go, courier-java, @trycourier/courier, trycourier (Python), @trycourier/react-inbox, trycourier (Ruby) |
| REST | Polar REST API | Courier REST API |
| MCP | Polar MCP | — |
| OTHER | Polar Checkout, Polar Webhooks | Courier Studio, Outbound Webhooks |
Staxly is an independent catalog of developer platforms. Some links to Polar and Courier 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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