The best AI writing tools split into general assistants, editors and marketing-copy tools. ChatGPT and Claude lead general writing, Grammarly leads editing, and Jasper and Copy.ai target marketing copy. Always fact-check AI output.
At a glance
| Tool | Best for |
|---|---|
| Claude | Long-form writing |
| ChatGPT | Versatile writing |
| Grammarly | Editing + rewriting |
| Jasper | Brand marketing copy |
| Copy.ai | Affordable copy |
| QuillBot | Paraphrasing |
Prices are USD and current as of June 2026 — verify on the official page.
The top picks
- Claude — careful, nuanced long-form text; Pro $20/mo.
- ChatGPT — fast, flexible writing across formats; free tier.
- Grammarly — grammar, style and AI rewriting; free plus Pro.
- Jasper — brand-consistent copy at scale for teams.
- Copy.ai — free tier plus low-cost short-form copy.
- QuillBot — affordable paraphrasing and summarising.
How to choose
For general writing, Claude (careful long-form) or ChatGPT (versatile) covers most needs. Add Grammarly for editing, and Jasper or Copy.ai for marketing-specific workflows. AI can fabricate facts and produce generic phrasing — always fact-check and edit, and don’t pass AI text off where originality or disclosure is required.
If you find yourself juggling a separate subscription for chat, automation, transcription and image generation, one option worth knowing is a single platform that runs them together — osFoundry is one such agentic AI platform that consolidates chat, agents and internal apps in one workspace, with a bring-your-own-key model so you choose the underlying AI.
Related reading
This article is general information, not professional, legal or financial advice. AI tools, prices and availability change fast — verify current details on the official source before you rely on them.