Courier
YC S19San Francisco, US · Founded 2019 · 35 employees · 6 known investors
Courier provides a notification platform that delivers messages to Slack and Teams with customizable routing, authentication, and multi-channel capabilities. It enables developers to send targeted, context-aware alerts and updates across multiple chat platforms from a single template.
Also known as Courier
Founders & leadership· Y Combinator alumni (S19)
Courier was founded in 2019 by Troy Goode.
Investors · 6
Company profile
researched Aug 2026Courier operates a customer messaging and notification platform that lets software teams send and orchestrate messages across email, SMS, push, an in-app inbox, and chat applications including Slack, Microsoft Teams and WhatsApp. A single REST API call is routed by Courier to each recipient's preferred channel and underlying delivery provider, with templating, routing rules, failover and delivery logs handled by the platform rather than by per-provider integrations built in-house.
The product set spans notification infrastructure (APIs, SDKs and primitives), Journeys for multi-step lifecycle workflows with triggers, delays, branches, batching and digests, Design Studio for no-code multi-channel content design and preview, an embeddable in-app Inbox notification center with real-time sync across devices, user preference management by topic and channel, and multi-tenancy that scopes branding, routing and preferences per customer. An AI Agent node can run frontier models such as GPT-5.4 and Claude Opus as a step in a workflow to score users, generate personalized content, enrich profiles and return structured output that downstream branches, sends and integrations consume. The platform covers both transactional notifications (password resets, receipts, alerts) and lifecycle marketing sequences from the same system.
Business model
Courier sells its platform directly as a usage-based software service. Customers bring their own delivery provider accounts — such as SendGrid, Postmark, Amazon SES, Twilio or Firebase Cloud Messaging — and connect them once; Courier layers routing, failover, templating, preferences and analytics on top and bills separately per send, so customers retain their own sender reputation, domains and provider pricing.
Usage-based pricing tied to notifications sent rather than seats or channels. Three plans are offered: a free Developer plan covering up to 10,000 sends per month, a pay-as-you-go Business plan at $0.005 per send that adds AI Translations and the AI Agent node, and a custom-priced Enterprise plan with volume discounts, dedicated Slack support, observability integrations, role-based access control, an enterprise SLA and EU data residency.
▸Full profile — market position, technology, go-to-market
Market position
Courier competes in the notification infrastructure and customer engagement software category, sitting as an orchestration layer above email, SMS, push and chat delivery providers and adjacent to lifecycle marketing automation tools.
Courier positions itself as a single platform serving developers, product teams, marketers and AI agents, combining transactional notification infrastructure with visual lifecycle journey building, a no-code and embeddable content designer, and an in-app inbox. It is provider-agnostic — customers keep their existing delivery vendors while Courier adds cross-channel routing, failover, preference enforcement and analytics — and prices on notification volume rather than per seat or per channel.
Technology
The platform is API-first, exposing a REST API for sending, users, preferences and journeys. Server SDKs cover Node, Python, Go, Ruby, Java, PHP and C#, and client SDKs cover React, JavaScript, iOS, Android, React Native and Flutter for in-app inboxes and embedded preferences. A CLI, an MCP server and agent skills allow AI coding agents to send messages, manage users and build notification workflows from a development environment. Platform capabilities include digest and batching, custom environments, API key management, internationalization and AI translations, multi-tenant support, custom link-tracking URLs, observability and data warehouse integrations, message and journey logs with tiered retention, and EU data residency. Listed compliance and security features include two-factor authentication, Google, GitHub and custom SSO, role-based access control, SOC 2 and GDPR compliance and HIPAA certification.
Go-to-market
Self-service, developer-led adoption via a free tier, quickstart documentation, SDKs, CLI and MCP server, complemented by a sales-assisted enterprise motion with demo requests, onboarding and training, dedicated Slack channels and negotiated contracts (MSA, DPA, BAA). Content marketing assets include a blog, guides, changelog, customer stories, integrations directory and free tools.
Developer, product, growth and marketing teams at software companies that need to embed notifications and lifecycle messaging in their products, ranging from individual developers on the free tier to enterprises requiring SLAs, RBAC and EU data residency. Marketed industry segments include healthcare, SaaS, HR platforms, marketplaces and developer platforms. The platform is also positioned for use by AI agents alongside human teams.
Compiled by commissioned research from 8 cited public sources — announcements, filings, and press listed under research sources below.
Key figures
latest reportedCompany-reported or press-reported figures, each dated to when it was claimed — not independently audited.
Competitors · 5
by search overlap
Companies competing with Courier for the same Google search keywords, organic and paid, via search-intersection analysis.
In the news
▸Research sources · 8
primary sources listed
- Couriercourier.com · web
8 public sources were cited for this profile; the first-party ones are listed here.
Frequently asked questions
- What does Courier do?
- Courier is a customer messaging and notification platform that orchestrates multi-channel messages from a single API and dashboard.
- Who founded Courier?
- Courier was founded by Troy Goode in 2019.
- Who are Courier's investors?
- Courier's investors include Bessemer Venture Partners, Matrix, Y Combinator, Norwest Venture Partners, Oak HC/FT, Work-Bench.
- Where is Courier headquartered?
- Courier is headquartered in San Francisco, US.