Getting Started with PostMimic

From sign-up to your first AI-generated post in under 10 minutes.

1. Create Your Account

  1. Go to app.postmimic.app and click "Sign Up"
  2. Enter your email and password
  3. Check your inbox for a verification email and click the link
  4. You start with 5 free AI-generated posts — no credit card required

2. Connect Your Platforms

  1. From the dashboard, go to Settings → Credentials
  2. Click "Connect" next to the platform you want to set up
  3. Supported platforms: X (Twitter), LinkedIn, Facebook, Instagram
  4. You'll be redirected to the platform to authorize PostMimic
  5. Once connected, you can publish directly from PostMimic
Note: Facebook personal timeline posting is not supported (Meta removed the API in 2018). You can post to Facebook Pages you manage.

3. Train Your Voice

  1. Go to the Voice tab
  2. Option A: Connect your X account and PostMimic will analyze your tweet history automatically
  3. Option B: Upload a tweets.js file from your X data export (Settings → Your Account → Download an archive of your data on x.com)
  4. PostMimic analyzes thousands of your real posts to build a voice fingerprint capturing your vocabulary, sentence structure, tone, and perspective
  5. Voice training takes a few minutes depending on how many posts you have
  6. You can retrain anytime if your style evolves

4. Generate Your First Post

  1. Go to the Post tab
  2. Select a topic or let PostMimic suggest one based on trending topics and your interests
  3. Choose your AI source:
    • Cloud AI — uses our servers, counts against your monthly post limit (DeepSeek by default, fast and cheap)
    • Your Own API Keys (BYOK) — enter keys from DeepSeek, OpenAI, Anthropic, or xAI in Settings. You pay the provider directly.
    • Local AI (Ollama) — runs on your computer's GPU. Free, private, unlimited. Requires Ollama installed (see Download page for setup).
  4. Click "Generate" and review the result
  5. Edit if you want, or approve it as-is
  6. Click "Publish" to post it to your connected platform

5. Set Up a Schedule

  1. Go to the Schedules tab
  2. Create a new schedule: pick a platform, set days and times, choose a timezone
  3. PostMimic will auto-generate and publish posts on your schedule
  4. Cloud scheduling works even when your computer is off (requires a paid subscription)
  5. You can review upcoming posts in the Queue tab before they go live

6. Brand Rules Pro & Agency

  1. Go to Brand Rules in the sidebar
  2. Set your role/title, tone range, and content guidelines
  3. Add forbidden topics — PostMimic will never generate content about these
  4. Add alliance and endorsement rules for political campaigns
  5. Enable factual constraints (never invent statistics, never quote anyone, etc.)
  6. Brand rules are injected into every generation to keep content on-brand and compliant

7. Desktop App vs Web Portal

Web Portal

Works in any browser, including iPad Safari. Best for quick generation, schedule management, and on-the-go approvals.

app.postmimic.app →

Desktop App

Full-powered app with local AI support (Ollama), offline drafting, and advanced configuration. Available for Windows, Mac (Apple Silicon), and Mac (Intel).

Download →

Both connect to the same account — your profiles, schedules, and settings sync between them.

8. Getting Help