The verdict
For a small team that spends on paid ads or email and wants fewer wasted tests, I'd pick Anyword. For a team where several people write for one brand and every draft needs an edit pass to fix the tone, I'd pick Jasper.
If you have both problems, start with the one that costs you more today. Slow, inconsistent drafts point to Jasper. Expensive losing variants point to Anyword. A solo founder who writes occasionally does not need either, and a general assistant with a good prompt is enough. Both have no free plan, only a trial, so use the trial on live work. Check which Jasper plan includes API access and the MCP server before you plan an integration.