Alternatives to Courier

Courier: Customer messaging platform for humans and AI agents. 8 products similar to Courier, compared on pricing, free tier, API, MCP server, SDK and open source. 8 of 8 have a free tier, 8 of 8 have an API, 5 of 8 offer an MCP server, 1 of 8 is open source.

Knock
Customer engagement infrastructure for product, marketing, and transactional messaging
Email & messaging free tierAPIMCPSDK
Novu
Open-source notification and agent communication infrastructure
Email & messaging free tierAPIMCPSDKopen source
Pusher
Hosted realtime APIs for building live features in web and mobile apps
APIs & backend free tierAPISDK
Pingram
Messaging APIs for emails, SMS, voice, and WhatsApp
Email & messaging free tierAPIMCPSDK
Postman
API engineering for your agents
APIs & backend free tierAPIMCPSDK
Flock
Team messenger and online collaboration platform
Email & messaging free tierAPI
Knocket
One Knock. Every Connection.
Email & messaging free tierAPISDK
Composio
Integration and tool-execution platform giving AI agents secure access to 1,500+ apps
AI agents & frameworks free tierAPIMCPSDK

Side by side

Product	Pricing	Free tier	API	MCP server	SDK	Open source
Courier	Freemium	yes	yes	yes	yes	no
Knock	Freemium · from $0	yes	yes	yes	yes	no
Novu	Freemium · from $0/month (Free, 10,000 workflow runs); Pro from $30/month; Team from $250/month; Enterprise custom	yes	yes	yes	yes	yes
Pusher	Freemium	yes	yes	no	yes	no
Pingram	Freemium · from $20/month	yes	yes	yes	yes	no
Postman	Freemium · from $9	yes	yes	yes	yes	no
Flock	Freemium	yes	yes	no	no	no
Knocket	Free	yes	yes	no	yes	no
Composio	Freemium · from $0	yes	yes	yes	yes	no

Facts come from each product's own website, or from its verified owner when they have edited the listing. Each product page shows when it was last verified and how it was extracted. Similarity comes from the products' descriptions.

API

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