Kit ◆
ConvertKit (now Kit) is an email-first platform that automates email marketing, newsletter growth, and digital product sales for creators.

Reteno (Email Marketing): Reteno is an AI messaging platform for mobile app retention, offering email, push, SMS, and web push automation. Pricing: from Free. (data verified August 2026)
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Reteno is an AI-powered messaging platform designed to help mobile app and web businesses boost customer retention and revenue through personalized, automated messaging across 8 channels, including email, push notifications, SMS, web push, and more. It solves the problem of user churn by enabling lifecycle marketing—delivering the right message at the right time, on the preferred channel, using AI-driven segmentation and personalization.
Reteno is ideal for subscription-based apps, e-commerce, and growth teams that need to engage users with automated, data-driven campaigns. It's particularly useful for mobile-first businesses looking to drive Web2App conversions and increase MAU and revenue. Not ideal for non-digital businesses or those without a mobile app or web presence, as core features rely on app/web activity data.
Real use cases include: a daily yoga app boosting annual revenue by 16% and DAU by 19% with personalized reminders; a walking app scaling CTR by 54% and CVR by 19% with multilingual campaigns; and a workout app with 50M+ installs increasing revenue by 14% with multi-message campaigns. Reteno also offers AI agents that work via Slack, Claude Cowork, or OpenAI Codex, and automated A/B testing to optimize performance.
Editorial score from our review methodology — not user ratings.
Reteno pricing: from Free. Billing model: Freemium.
Free forever plan with 1,000 sends per channel (unlimited mobile push), 20,000 workflow launches per month, unlimited segments, email and chat support.
Includes everything in STARTUP, unlimited workflows, all 8 channels (SMS additional fees apply), and a dedicated Customer Success manager. From 10K to 250K profiles, pricing is about $3 per 1,000 contacts (Growth plan around $1 per 1,000 contacts on another pricing table—verify).
For over 250K user profiles. Everything in GROWTH plus custom machine learning algorithms and custom retention strategy. Contact sales for pricing.
Free trial: STARTUP is free forever, no credit card required. Growth plan offers a free trial or start free.
Don’t take our word for it — ask your AI about Reteno