PostOnce is an automatic social media crossposting tool for creators, small businesses and agencies. Publish a video once and PostOnce republishes it to up to 9 platforms within 20 minutes. It has 17 integrations including Google Drive, Canva, Dropbox, Zapier, Make and n8n, plus a REST API and an MCP server. Unlimited workflows and posts, with a 7-day free trial.