There are three kinds of AI tool a newsletter writer reaches for. A general assistant drafts, edits and researches anything you ask. A marketing writer adds brand voice and templates for a team. An editor cleans up what you already wrote.
A fourth kind builds the whole issue for one type of newsletter. lightbreak does that for local newsletters, and it is owned by 8th Replay, the company behind this site. It is listed here with the same facts-only treatment as the rest.
At a glance
| Free plan | Starting price | |
|---|---|---|
| ChatGPT | Yes. The Free plan has unlimited text chats, with limited uploads, image creation, voice, deep research and memory. | Not published. |
| Claude | Yes. The Free plan includes web search, connectors and up to 5 Projects. | Pro is $17 a month on an annual plan (billed up front as $200), or $20 a month billed monthly. |
| Gemini | Yes. It costs $0 with a Google Account and includes Deep Research, Gems, Canvas and Gemini Live. | Google AI Plus is $4.99 a month. Google AI Pro is $19.99 a month. |
| Jasper | No. There is a 7-day free trial of Pro. | Pro is $59 per seat a month billed annually, or $69 per seat a month billed monthly. |
| Copy.ai | Not published. | Chat is $24 a month billed annually ($288 a year), or $29 a month billed monthly. It includes 5 seats. |
| Grammarly | Yes. It corrects spelling and grammar, shows tone and includes 100 AI prompts a month. | Pro is $12 USD a month. Yearly billing is not published. |
| Notion | Yes. Limits include 5 MB file uploads, 7 days of page history and 10 external guests. | Plus is $10 per member per month. Yearly billing saves up to 20%. |
| lightbreak | Not published. | Not published. |
Prices and plans change. We checked these figures on October 10, 2026, so confirm them before you buy.
What each one is
ChatGPT
An AI assistant from OpenAI that chats, writes, searches the web, makes images and runs deep research. Brainstorming, drafting, editing and researching newsletter content.
Claude
Claude is an AI assistant that drafts and edits text, searches the web, reads uploaded files and connects to other apps. Drafting and editing newsletter copy and researching stories.
Gemini
Gemini is Google's AI assistant app for writing, planning and research, with a free tier and paid Google AI plans. Drafting and outlining newsletter issues and researching topics.
Jasper
Jasper is an AI platform for marketing teams that holds brand voice and style rules and uses them across writing agents. Writing newsletter and marketing copy in a saved brand voice.
Copy.ai
Copy.ai is an AI go-to-market platform with chat, workflows and brand voice, aimed at sales and marketing teams. Drafting copy in a set brand voice.
Grammarly
Grammarly is a writing assistant that checks grammar, tone and clarity and rewrites text, in browsers, apps and documents. Proofreading and polishing newsletter copy.
Notion
Notion is a workspace that keeps team information in one place and adds AI to find answers and run recurring work. Keeping a newsletter team's notes, ideas and recurring tasks in one workspace.
lightbreak
Newsletter software for local media that gathers local content, writes it in your voice and builds one issue. Producing a local email newsletter issue and pushing it to an email platform.
How to use them without sounding like a robot
Use an assistant for the parts that are slow, not the parts that are yours. Research, outlines, subject line options and a first tidy-up are good jobs for it. Your opinions, your reporting and your voice are what readers subscribed for.
Whatever tool you pick, check every fact it gives you against a source before you send. An assistant can state something wrong with full confidence.
Is ChatGPT free to use?
Yes. There is a Free plan with unlimited text chats, subject to abuse guardrails. Uploads, image creation, voice, deep research and memory are limited on Free.
Can Claude read files I upload?
Yes. It reads common formats including Word, PDF, Excel, PowerPoint, CSV and code files.
Is Gemini free?
Yes. The Free plan costs $0 with a Google Account and includes Deep Research, Gems and Canvas.
Does Jasper have a free plan?
No. There is a 7-day free trial of Pro.
How much does Copy.ai cost?
The Chat plan is $24 a month billed annually or $29 a month billed monthly. Growth is $1,000 a month billed as $12,000 a year.