Related Products
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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.
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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.
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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
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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
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Audience
Companies interested in a reliable notifications infrastructure that's built to scale
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Audience
Companies that want to retain users with a push notifications solution
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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Support
Phone Support
Not Supported
24/7 Live Support
Not Supported
Online
Supported
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API
Offers API
Not Supported
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API
Offers API
Not Supported
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Screenshots and Videos |
Screenshots and Videos |
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Pricing
$250 per month
Free Version
Supported
Free Trial
Not Supported
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Pricing
$30 per month
$30 per month for up to 10K user profiles
Custom plan available
Free Version
Supported
Free Trial
Not Supported
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Reviews/
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Reviews/
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Training
Documentation
Supported
Webinars
Not Supported
Live Online
Not Supported
In Person
Not Supported
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Company InformationKnock
Founded: 2021
United States
knock.app/
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Company InformationReteno
Founded: 2017
Poland
reteno.com
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Alternatives |
Alternatives |
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Categories |
Categories |
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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
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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
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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
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