Sydium
ChatGPT plugin by Parhelion · Schedule posts in your voice
About Sydium
Sydium is a ChatGPT plugin by Parhelion in the Productivity category of the ChatGPT plugin directory. Its listing describes it as “Schedule posts in your voice”. It was created on Jul 28, 2026 and has been tracked in the directory since Oct 2, 2026.
Sydium does not currently reach the top 10 for common Productivity searches in the directory, so most people find it by searching for its name.
On the directory's Productivity page it is listed at position 511 of 638.
Sydium for ChatGPT connects your existing Sydium workspace - it requires an active plan or trial, and connecting doesn't start one (plans are managed at sydium.com).From the plugin’s directory listing
Search positions
Sydium is not in the results of any tracked search.
Listing check
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0 / 30Put a search term in the name Search rankThe name has none of the tracked search terms.Directory search ranks name matches first: 74% of top-3 results have the search term in the name. Searches for a brand name itself are not tracked.10 of 20 category leaders do this
Recent changes
No changes yet.
Sydium: questions and answers
What does Sydium do?
Schedule posts in your voice. Sydium for ChatGPT connects your existing Sydium workspace - it requires an active plan or trial, and connecting doesn't start one (plans are managed at sydium.com).
Who makes Sydium?
Sydium is developed by Parhelion.
How do I add Sydium to ChatGPT?
Open ChatGPT, go to Plugins, search for “Sydium” and select Install plugin. You can also open its page in the directory directly.
Is Sydium still available in ChatGPT?
Yes. Sydium was listed in the ChatGPT plugin directory at the latest hourly check.