Mailmerge-JS
Gmail Email Writing
AI-powered Gmail automation for personalized emails
Like GmailGPT, Mailmerge-JS is in the Gmail Email Writing category. Both are free. Worth comparing on the detail page.
We've curated 49 of the best alternatives to GmailGPT, ranked by feature overlap, topic similarity, user ratings, and popularity. Mailmerge-JS, AI Mail Assistant, and ChatGPT Mail Responder lead the list as the closest matches.
Updated May 18, 2026
The list includes 45 free alternatives, 3 freemium, and 1 with a free trial, so whether you're looking for a no-cost replacement or a more capable paid tier, there's an option to compare. GmailGPT itself is free, which makes free alternatives the most natural starting point.
Many of these tools cluster around use cases like Free, Chatgpt, Ai Writing Tool, and Email Automation — the same problem spaces GmailGPT addresses. Cross-referencing tools that overlap on multiple topics gives a more reliable signal than category alone, because two products in the same category can still serve very different workflows.
Our ranking weighs eight signals: shared category, topic overlap, feature overlap, name and description text similarity (via PostgreSQL's pg_trgm and tsvector), Bayesian-smoothed user ratings, pricing-model match, popularity, and editorial overrides. Scores are then normalized within each tool's own candidate pool so the top match always represents the strongest available alternative.
Use the table of contents below to jump to free or paid alternatives, or scroll down to compare each option side-by-side with GmailGPT.
Ranked by compatibility score
Gmail Email Writing
AI-powered Gmail automation for personalized emails
Like GmailGPT, Mailmerge-JS is in the Gmail Email Writing category. Both are free. Worth comparing on the detail page.
Gmail Email Writing
ChatGPT AI for Gmail: Generate, summarize, translate, and improve emails.
45 free and 3 freemium options.
25 additional candidates
Mailmerge-JS ranks as the highest-scoring alternative to GmailGPT, based on shared category, topic overlap, feature similarity, and user ratings. Ratings are still being collected for this tool.
Yes — 45 fully free and 3 freemium alternatives are available, including Mailmerge-JS, AI Mail Assistant, and ChatGPT Mail Responder.
Mailmerge-JS is similarly priced (free) and sits in the same category (Gmail Email Writing). View its detail page to compare features, integrations, and reviews side-by-side.
Top Gmail Email Writing alternatives include Mailmerge-JS, AI Mail Assistant, ChatGPT Mail Responder, and Hiwriter. These tools share the same primary category and have meaningful topic overlap with GmailGPT.
Like GmailGPT, AI Mail Assistant is in the Gmail Email Writing category. Both are free. Worth comparing on the detail page.
Gmail Email Writing
AI-powered Gmail assistant for faster, smarter responses
Like GmailGPT, ChatGPT Mail Responder is in the Gmail Email Writing category. Both are free. Worth comparing on the detail page.
Gmail Email Writing
Generate perfect emails instantly with AI in Gmail
Like GmailGPT, Hiwriter is in the Gmail Email Writing category. Both are free. Worth comparing on the detail page.
Gmail Email Writing
Gmail emails that write themselves? It's not magic, it's MailWizard.
Like GmailGPT, MailWizard is in the Gmail Email Writing category. MailWizard is free-trial, while GmailGPT is free. Worth comparing on the detail page.
Gmail Email Writing
AI learns from you and drafts answers to all your emails
Like GmailGPT, Auto Gmail is in the Gmail Email Writing category. Auto Gmail is freemium, while GmailGPT is free. Worth comparing on the detail page.
Gmail Email Writing
AI drafts Gmail replies automatically
Like GmailGPT, Ready to Send is in the Gmail Email Writing category. Ready to Send is freemium, while GmailGPT is free. Worth comparing on the detail page.
Gmail Email Writing
Automatically draft email replies, straight from Gmail.
Like GmailGPT, Trimbox AI Assistant is in the Gmail Email Writing category. Trimbox AI Assistant is freemium, while GmailGPT is free. Worth comparing on the detail page.
Chatgpt
Display AI responses alongside search results.
ChatGPT for Google shares 2 topics with GmailGPT: Free and Chatgpt. Both are free.
Social Media Bios
Craft perfect social bios with AI magic.
AI Social Bio shares 2 topics with GmailGPT: Ai Writing Tool and Free. Both are free.
Chatgpt
Super Easy access to ChatGPT with a simple Chrome-Extension
GPTAnywhere shares 2 topics with GmailGPT: Free and Chatgpt. Both are free.
Paraphrasing
Rephrase text fluently with AI
Scribbr shares 2 topics with GmailGPT: Ai Writing Tool and Free. Both are free.
Email Replies
Reply to any email in 5 seconds with AI.
MailBuddy shares 2 topics with GmailGPT: Free and Email Automation. Both are free.
Customer Support
AI Support Agent to accelerate ticket resolution
Growparabolic shares 2 topics with GmailGPT: Free and Chatgpt. Both are free.
Paragraphs
Spark creativity with AI-powered inspiration.
The Inspirer shares 2 topics with GmailGPT: Ai Writing Tool and Free. Both are free.
Content
Generate AI content in Google Sheets instantly.
SV Master by Startupvisors shares 2 topics with GmailGPT: Free and Chatgpt. Both are free.
Email Writing
Craft personalized emails effortlessly with AI
AI Mailer shares 2 topics with GmailGPT: Free and Email Automation. Both are free.
Chatgpt
Free, open-source ChatGPT interface with privacy focus
Chatpad shares 2 topics with GmailGPT: Free and Chatgpt. Both are free.
Data Analysis
Turn Datasette into a ChatGPT plugin for data queries.
Datasette ChatGPT plugin shares 2 topics with GmailGPT: Free and Chatgpt. Both are free.
English Lessons
Learning English with support of ChatGPT.
ChatEngGPT shares 2 topics with GmailGPT: Free and Chatgpt. Both are free.
Chatgpt For Gmail
Boost email writing productivity and quality.
ChatGPT for Gmail shares 2 topics with GmailGPT: Free and Email Automation. Both are free.
Email Replies
Voice-to-email: Speak your reply, AI writes it.
VoxReplay shares 2 topics with GmailGPT: Free and Email Composition. Both are free.
Game Development
Create and play AI-powered games instantly.
GPT Games shares 2 topics with GmailGPT: Free and Chatgpt. Both are free.
Paraphrasing
Paraphrase content into clear, fluent messages.
Revrite shares 2 topics with GmailGPT: Ai Writing Tool and Free. Both are free.
42 more free/freemium alternatives listed below. Browse all GmailGPT alternatives ↓
48 free or freemium alternatives to GmailGPT on /tools/gmailgpt/alternatives.
ChatGPTPromptGenerator shares 2 topics with GmailGPT: Ai Writing Tool and Free. Both are free.
Neither GmailGPT nor Mailmerge-JS has user ratings yet — be the first to review either tool to help future visitors compare them.
