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About

The most powerful notification system you'll never build. Knock is flexible, reliable notifications infrastructure that's built to scale with you. Use our APIs to engage users, power cross-channel workflows, and manage notification preferences. Move fast with a notification engine that’s ready to scale from your first welcome email to a cross-channel system that puts your customer first. With Knock, you get a team that’s dedicated to one thing and one thing only: your notifications. Start with email and in-app channels. Instantly add push, SMS, and Slack when you need them. Predictable pricing that scales with you. No upfront fees or infrastructure set up required. Power high volume notifications without spending valuable engineering time on messaging infrastructure.

About

Reteno is an AI messaging platform for subscription app retention and conversion. Manage messaging through AI agents in Slack, Claude Cowork, and OpenAI Codex using natural language — no platform switching required. Built for Web2App, trial, freemium, and direct install funnels, Reteno handles Email, Mobile Push, In-App, App Inbox, SMS, Web Push, and messengers. Key AI features: - "One from Many" feature automates variant testing inside workflows and promotes stronger performers; - built-in AI generates push messages and optimizes email content on demand; - responsive email editor enables real-time collaboration and comments. Proven in Health & Fitness and Education verticals, Reteno offers ready-to-deploy playbooks that deliver measurable revenue lift faster than generic lifecycle platforms.

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Platforms Supported

Windows Not Supported
Mac Not Supported
Linux Not Supported
Cloud Supported
On-Premises Not Supported
iPhone Not Supported
iPad Not Supported
Android Not Supported
Chromebook Not Supported

Audience

Companies interested in a reliable notifications infrastructure that's built to scale

Audience

Companies that want to retain users with a push notifications solution

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

Support

Phone Support Not Supported
24/7 Live Support Not Supported
Online Supported

API

Offers API Not Supported

API

Offers API Not Supported

Screenshots and Videos

Screenshots and Videos

Pricing

$250 per month
Free Version Supported
Free Trial Not Supported

Pricing

$30 per month
$30 per month for up to 10K user profiles

Custom plan available
Free Version Supported
Free Trial Not Supported

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Reviews/Ratings

Overall 0.0 / 5
ease 0.0 / 5
features 0.0 / 5
design 0.0 / 5
support 0.0 / 5

This software hasn't been reviewed yet. Be the first to provide a review:

Review this Software

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Training

Documentation Supported
Webinars Not Supported
Live Online Not Supported
In Person Not Supported

Company Information

Knock
Founded: 2021
United States
knock.app/

Company Information

Reteno
Founded: 2017
Poland
reteno.com

Alternatives

Alternatives

Sweego

Sweego

Mindbaz
Ackee

Ackee

Ackee Digital Enterprises

Categories

Categories

Push Notifications Features

A/B Testing Supported
Analytics Supported
Campaign Segmentation Supported
Contextual Targeting Supported
Device Targeting Not Supported
Expiry Notifications Not Supported
Geo Targeting Not Supported
Mobile Notifications Supported
Notification Scheduling Supported
Visual Notifications Not Supported
Web Notifications Supported

Customer Success Features

Account Alerts Not Supported
Account Management Not Supported
Communication Management Not Supported
Customer Engagement Supported
Customer Lifecycle Management Supported
Health Score Not Supported
Onboarding Not Supported
Revenue Management Not Supported
Usage Tracking / Analytics Supported
Win / Loss Analysis Not Supported

Integrations

AccessOwl Supported
Axis LMS Not Supported
CheckpointID Supported
Claude Not Supported
ElectroNeek Supported
Hyly.AI Supported
OneDay Supported
Slack Not Supported
Zapier Not Supported
Zuma Supported

Integrations

AccessOwl Not Supported
Axis LMS Supported
CheckpointID Not Supported
Claude Supported
ElectroNeek Not Supported
Hyly.AI Not Supported
OneDay Not Supported
Slack Supported
Zapier Supported
Zuma Not Supported
Claim Knock and update features and information
Claim Knock and update features and information
Claim Reteno and update features and information
Claim Reteno and update features and information