Publishing & calendar
Buffer
Scheduled posting across eleven networks is well evidenced, with genuinely per-network behaviour — first comments on Instagram, Facebook and LinkedIn, threads on X, Bluesky, Threads and Mastodon, and reminders for Instagram, TikTok and YouTube. I found no public information on the calendar as a working surface, bulk or CSV operations, or what the customer sees when a scheduled post fails overnight.
Hootsuite
The publishing pages show bulk scheduling of up to 350 posts at once, a calendar covering paid and organic across networks in list and calendar views, best-time heat maps with automatic scheduling, and documented per-network constraints such as Bluesky's 300-character captions. Publishing failures are visible to me mainly as after-the-fact fix notices; we found no public information on failure notifications with one-click retry, link shortening with UTM rules, or previews matching each network's actual rendering.