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PostFast vs Kalen

A side-by-side comparison built from both listings. Blank cells mean the company has not given that detail; we never guess.

PostFast compared with Kalen
DetailPostFast logo PostFastKalen logo Kalen
What it doesSchedule social media posts across 11 platforms from one dashboard X assistant that integrates with Claude, ChatGPT and Cursor to research your niche, score AI-written posts and publish them on X
StageStartup Startup
Founded2025 Not given
Based inBG Not given
Pricing modelFreemium Freemium
Pricing7-day free trial with no credit card required. Starter: €10/month billed yearly or €12/month billed monthly. Creator: €24/month billed yearly or €29/month billed monthly. Growth: €40/month billed yearly or €49/month billed monthly. Pro (Agency): €82.50/month billed yearly or €99/month billed monthly Starter $9/month or $90/year (100 credits per month); Pro $29/month or $290/year (700 credits per month); Ultra $49/month or $490/year (1,500 credits per month). A post costs 1 credit, 2 with a first reply or link. Unused credits last 3 months. All plans include 14 days free with 50 credits.
Key features
  • Schedule posts up to a year ahead across 11 platforms
  • Fully automated Instagram Reels and TikTok publishing
  • Post approval workflows with role-based permissions
  • Analytics with CSV and PDF export
  • REST API for custom integrations
  • AI agent integration with Claude, ChatGPT and more
  • Daily niche research: top posts for keywords and X trends
  • Weekly analysis of reference account and own account performance
  • Post scoring from 0 to 100 using TypeSafe's Jev judgment model
  • Automatic rewrites up to 3 rounds for posts below pass mark
  • Schedule posts up to 3 weeks in advance
  • Optional first reply with link below each post
  • Credit-based pricing: 1 credit per post, 2 with reply or link
  • Unused credits last 3 months
What makes it different
  • Write once, publish to all 11 platforms with platform-specific customization
  • Priced per plan, not per channel or per seat
  • Fully automated publishing to Instagram Reels and TikTok without manual intervention
  • Social Inbox included on every plan with no per-conversation fee
  • AI agents and API access included on every plan
  • Works inside your existing AI without a separate editor or new subscription
  • Runs no writing model; your AI writes, Kalen researches and scores
  • Nothing publishes without your explicit approval in chat
  • Scores posts against what works in your niche and your own best posts
  • Publishes through X's official API with optional first reply for links
Community votes00
DR (Domain Rating by Ahrefs)57 −3 (down) since last check19 +1 (up) since last check
Trust Flow (Majestic)1311
Citation Flow (Majestic)3817
Referring domains (Majestic)51825

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