Synapse

Synapse is a social media scheduler that covers the nine platforms a solo creator actually juggles — X, LinkedIn, Bluesky, TikTok, Instagram, YouTube, Facebook, Threads and Pinterest — with per-platform captions, scheduled posting, built-in visual design tools and analytics. "Write once, post everywhere" is a crowded category, and Synapse knows it: the site leads with "all-in-one, fairly priced" and a $0 start, positioning squarely against the $30+/month incumbents.

It also ships an API with MCP support (agent integrations are explicitly on the roadmap), which is a quietly smart move — scheduling tools that your AI assistant can drive are stickier than dashboards.

Who it's for: indie creators and small teams cross-posting everywhere without wanting a SaaS bill per platform. The 7-day free trial answers the real question (does each platform's formatting survive the cross-post) better than any feature table. Check API rate limits against your posting volume if you're automating — and remember that per-platform voice tuning still needs a human eye; identical copy on X and LinkedIn reads as automation to everyone.