Flagsmith vs Courier
Open-source feature flags + remote config — SaaS, private cloud, self-host
vs. Notification API with multi-channel orchestration, templates, and preferences
Pricing tiers
Flagsmith
Free
$0. 50,000 API requests/mo. 1 team member. Unlimited flags. Community support.
Free
Self-hosted
$0 (OSS). Host yourself via Docker/K8s. Fair-source license (non-compete).
$0 base (usage-based)
Start-up
$40/mo. 1,000,000 API requests/mo. 3 team members. Standard support.
$40/mo
Scale-up
$200/mo. 5,000,000 API requests. 10 team members. Priority support + SLA.
$200/mo
Enterprise
Custom. Unlimited API requests, SSO, SAML, RBAC, audit logs, on-prem.
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 free on Flagsmith vs free on Courier.
| Metric | Flagsmith | Courier |
|---|---|---|
| notifications monthly | — | 10000 notifications/mo |
Features
Flagsmith · 14 features
- A/B Testing — Multivariate flag splits.
- Audit Log — Full history of flag changes.
- Change Requests — Approval workflow for flag changes.
- Edge API — Global low-latency flag eval.
- Feature Flags — Boolean + multivariate + JSON flags.
- Local Evaluation — Server SDKs eval flags locally — no per-req API call.
- Percentage Rollouts — Gradual traffic ramp.
- Remote Config — Non-boolean config values.
- Role-Based Access — Fine-grained permissions.
- Scheduled Flags — Time-based flag changes.
- Segments — Rule-based targeting.
- Self-Hosting — Docker/Helm install.
- SSO + SAML — Enterprise SSO.
- Webhooks — Outbound event streaming.
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 | Flagsmith | Courier |
|---|---|---|
| CLI | Flagsmith CLI | Courier CLI |
| SDK | flagsmith-android, flagsmith-go, flagsmith-ios, flagsmith-java, flagsmith-js (browser), flagsmith-nodejs, flagsmith-python, flagsmith-ruby | courier-go, courier-java, @trycourier/courier, trycourier (Python), @trycourier/react-inbox, trycourier (Ruby) |
| REST | Flagsmith REST API | Courier REST API |
| OTHER | Flagsmith Dashboard, Flagsmith Webhooks | Courier Studio, Outbound Webhooks |
Staxly is an independent catalog of developer platforms. Some links to Flagsmith 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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