Sendible
Sendible: White-label scheduling for agencies. Forty-nine profiles max on Scale before custom quotes.
Best for: Best if profile caps per tier is not a blocker and you prefer Sendible's specialty features.
Postmixr
Postmixr is a social media scheduler with a visual calendar, bulk CSV, and MCP for AI assistants. Free for up to 3 connected accounts. Starter is $14.99/month (3 workspaces). Pro is $39.99/month (15 workspaces) with team invites and no per-seat pricing.
Best for: Best if you want flat workspace pricing, a calendar the whole team can use, and optional API or MCP without a developer-only workflow.