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PostAgent® vs Kalen

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

PostAgent® compared with Kalen
Detail PostAgent®Kalen logo Kalen
What it doesSocial media scheduling built for AI agents X assistant that integrates with Claude, ChatGPT and Cursor to research your niche, score AI-written posts and publish them on X
StageNot given Startup
FoundedNot given Not given
Based inNot given Not given
Pricing modelPaid Freemium
PricingPro plan: $29 when charged monthly. Yearly option available at 50% discount. Includes access to all features, up to 10 connected accounts, all platforms with multiple accounts each, unlimited scheduled posts, full API and MCP access, and automatic retries. 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
  • Single API call to schedule posts across X, LinkedIn, Facebook, Instagram, YouTube and TikTok
  • Per-platform caption overrides
  • Connect multiple accounts per platform
  • Unified calendar with per-platform status
  • Idempotency keys prevent duplicate posts
  • Automatic retries with backoff
  • OpenAPI spec and llms.txt for agent integration
  • Simulated mode for testing before connecting accounts
  • Manual composer and programmatic API posting
  • MCP access for advanced integrations
  • 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
  • Purpose-built API for AI agents with agent-ready documentation
  • One API call reaches all major social platforms simultaneously
  • Prevents duplicate posts with idempotency keys
  • Test entire workflow before connecting real accounts
  • Unified calendar with human-friendly interface
  • 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)8 −1 (down) since last check19 +1 (up) since last check
Trust Flow (Majestic)511
Citation Flow (Majestic)1717
Referring domains (Majestic)1325

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