Synthetic customers timeline cover

Catch broken lifecycle journeys with synthetic users and AI

Paste one prompt into a coding agent and get a local test of your onboarding journey: synthetic users, real timing, and every send explained. Catch stale reminders before your customers do.

By Thomas Schiavone

November 02, 2026

Send rate limits cover

Control how fast Courier sends to your providers

You shouldn't have to think about how fast you send to Courier. Set a send rate limit on any provider, and Courier sends your notifications to it at the rate you choose. Anything over the limit is queued, not dropped.

By Thomas Schiavone

October 20, 2026

Preference webhooks and change history cover

Know the moment users change notification preferences

Every preference change in Courier now reaches your systems two ways. A `preferences:user:updated` webhook fires the moment a user opts in, opts out, or changes a topic's channels, wherever they made the change. `GET /preferences/logs` returns the history, newest first, with the previous value where Courier knows it. Keep your CRM, warehouse, or marketing tools in step with what users chose.

By Emily Lane

October 14, 2026

Courier vs Customer.io: 2026 messaging platform comparison — cover

Courier vs Customer.io: 2026 customer messaging comparison

Courier and Customer.io both send across email, push, SMS, and in-app, but they are not priced or built the same way. Courier bills by the send, puts journeys, experiments, broadcasts, an in-app inbox, preferences, and 50+ delivery providers on one platform, and exposes all of it through an API, a CLI, and an MCP server. Customer.io bills by the number of profiles in your database and is built around marketing campaigns. This comparison covers pricing, journeys, channels, in-app messaging, localization, and preferences, with every competitor figure taken from Customer.io's own pricing page and docs.

By Kyle Seyler

September 02, 2026

Template Metrics API cover

Your notification analytics are now available by API

If it's in the Courier dashboard, it's on the API. Analytics was one of the last screens where that wasn't true. GET /notifications/{id}/metrics returns sends, deliveries, opens, clicks, errors, and undeliverable counts per template as a time series, broken out by provider and channel, so the numbers can live in your own product or go straight to an agent.

By Thomas Schiavone

September 02, 2026

Top 13 push notification platforms compared for 2026, cover

Top 11 push notification platforms compared for 2026

Push starts as the whole job, then product wants an email fallback, legal wants a preference center, and support wants a searchable log. This guide compares 11 push notification platforms on channels, free tiers, and pricing, and shows why Courier's single API for push, email, SMS, in-app inbox, Slack, and Microsoft Teams fits that arc better than a push-only tool. Includes Airship's 2025 opt-in and open-rate benchmarks, a full-stack cost comparison, and what each platform leaves you to build.

By Kyle Seyler

August 17, 2026

Notification Infrastructure vs Marketing Platform: When You Need Each — cover

Notification Infrastructure vs Marketing Platform

Product events trigger notifications. People schedule campaigns. A three-question rubric for putting each message on the right layer, and where Courier covers both.

By Kyle Seyler

May 22, 2026

12 Best Customer Journey Orchestration Tools in 2026 — cover

11 Best Customer Journey Orchestration Tools in 2026

API-first infrastructure, customer engagement platforms, and enterprise suites compared: the 11 customer journey orchestration tools engineers and marketers shortlist.

By Kyle Seyler

May 19, 2026

Transactional vs Marketing Email: A Developer's Guide to Deliverability, Consent, and Infrastructure — cover

Transactional vs Marketing Email: A Developer's Guide to Deliverability, Consent, and Infrastructure

What separates transactional from marketing email, and why it shapes everything from sender reputation to which API you should reach for.

By Kyle Seyler

May 15, 2026

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