What is Post Reaction used for?

Post Reaction is a desktop app for Mac and Windows that lets AI bots react to two versions of a social post so you can compare likely engagement before publishing. It is a good fit for A/B testing post wording before publishing; and creators who prefer a local, privacy-focused workflow.

Is Post Reaction open source?

No. Post Reaction is proprietary (closed-source) software. In the Social Media category, open-source options include Postiz, Bluesky and Elk.

What are some alternatives to Post Reaction?

Post Reaction competes with Taplio and AuthoredUp.

Post Reaction: features, pricing and alternatives

About Post Reaction

Post Reaction is a desktop application for Mac and Windows that helps you decide which draft of a social media post to publish. You enter two versions of a post, and a set of AI bots, each with its own personality, interests and social behavior, respond to both by commenting, liking, sharing and bookmarking.

After the bots react, you review the interactions and metrics side by side to see which version drew stronger engagement. You can add your own name, username and profile image to make the preview look like your real account.

The app supports several model providers, including DeepSeek, OpenAI, Anthropic, xAI, Ollama, LM Studio and custom models. It can run locally and offline, and content leaves your device only if you choose a cloud model. Pricing is a free tier plus one-time Plus and Pro purchases rather than a subscription.

Key features

Side-by-side testing of two post versions
AI bots with distinct personalities react to posts
Comments, likes, shares and bookmarks per version
Supports OpenAI, Anthropic, xAI, DeepSeek, Ollama and LM Studio
Runs locally on Mac and Windows
Custom name, username and profile image in previews

Good fit for

A/B testing post wording before publishing
Creators who prefer a local, privacy-focused workflow

Tags: social-media; desktop-app; ai-bots; ab-testing; ollama; one-time-purchase

Post Reaction: questions and answers

What is Post Reaction used for?: Post Reaction is a desktop app for Mac and Windows that lets AI bots react to two versions of a social post so you can compare likely engagement before publishing. It is a good fit for A/B testing post wording before publishing; and creators who prefer a local, privacy-focused workflow.
Is Post Reaction open source?: No. Post Reaction is proprietary (closed-source) software. In the Social Media category, open-source options include Postiz, Bluesky and Elk.
What are some alternatives to Post Reaction?: Post Reaction competes with Taplio and AuthoredUp.