PostAgent® vs Post Once

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 Post Once
Detail	PostAgent®	Post Once
What it does	Social media scheduling built for AI agents	Auto cross-posting and social media backup for content creators
Stage	Not given	Not given
Founded	Not given	Not given
Based in	Not given	Not given
Pricing model	Paid	Freemium
Pricing	Pro 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.	Free: $0 with 10 reposts and 10 backups. Solo: $9/month ($7.50/month billed yearly at $90/year) for 1 source account with unlimited reposts and backups. Studio: $19/month ($15.83/month billed yearly at $190/year) for 3 source accounts. Agency: $99/month ($82.50/month billed yearly at $990/year) for
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	Automatic reposting to Instagram, YouTube, Facebook, Threads and X Backup to Google Drive, Dropbox, Backblaze B2 or Amazon S3 Automatic retry up to 5 times if a repost fails Email notifications when reposts fail One-click retry for failed posts Connection warning alerts Caption preservation during reposting Story reposting and backup
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	Post as usual with no new routine to learn Set it up once, then forget it Direct upload algorithm boost shows on every platform Your posts stay in your own storage even if accounts are lost No re-uploading or manual copying needed
Community votes	0	0
DR (Domain Rating by Ahrefs)	8 −1 (down) since last check	8 +1 (up) since last check
Trust Flow (Majestic)	5	32
Citation Flow (Majestic)	17	19
Referring domains (Majestic)	13	10

5 details filled in for both companies.

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