PostOnce vs Shadowly

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

PostOnce compared with Shadowly
Detail	PostOnce	Shadowly
What it does	Auto post your videos everywhere through official platform APIs	View public Instagram profiles, stories, posts, reels and highlights without logging in
Stage	Not given	Not given
Founded	2023	Not given
Based in	CA	Not given
Pricing model	Free trial	Freemium
Pricing	Creator: $261/year ($0.72/day) or $29/month; Pro: $621/year ($1.70/day) or $2.27/month; Agency: $1791/year ($4.91/day) or $6.54/month. All plans include 7-day free trial, no credit card required.	Free plan includes 1 free try per day per tool, 1 Instagram Creator Report, 1 Instagram Engagement Calculator, 1 Instagram Profile Analysis, 1 TikTok Profile Analysis, and access to various profile sections. Weekly plan: $1.20 per week for 10 credits. Monthly plan: $5.00 per month for 100 credits. E
Key features	Automatic crossposting to 9 platforms Post scheduling Existing content distribution Image repurposing Developer API 17+ integrations Workflow creation and management Human support	Profile viewer showing profile photo, name, verification, post, follower and following counts, plus latest posts Anonymous stories viewing with progress bars and no account owner notification Highlights viewer for opening any highlight from the profile Reels download as MP4 files Follower and following lists with profile jumping capability Instagram engagement rate calculation from followers, likes and comments Instagram Creator Report with quality score, profile audit and estimated sponsorship rates TikTok profile analysis showing views, engagement and top videos
What makes it different	Post once and publish automatically to all connected platforms No reach loss compared to manual posting Founder-led support with real people Post using official platform APIs only Maintain your natural posting workflow	No login or password required, never asks for Instagram credentials Anonymous story viewing so account owners cannot see you watched Independent tool not affiliated with Instagram or Meta Works on mobile and requires no app installation Results appear in seconds without complex setup
Free plan	Not given	Not given
Open source	Not given	Not given
Platforms	Not given	Not given
Public API	Not given	Not given
Community votes	0	0
DR (Domain Rating by Ahrefs)	61 no change since last check	5 +1 (up) since last check
Trust Flow (Majestic)	10	0
Citation Flow (Majestic)	39	0
Referring domains (Majestic)	678	0

5 details filled in for both companies.

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