Best AI tools for email

ProWritingAid

Writing · Multi-model (proprietary + LLM-assisted features)

8.0

AI-powered writing coach and manuscript editor built for fiction authors and long-form writers.

Jasper

Writing · Multi-model (OpenAI / Anthropic via API)

7.6

Marketing-team-focused AI copywriter and content workflow.

Anyword

Writing · Multi-model

7.2

AI marketing copy platform that scores and predicts content performance before you publish.

Copy.ai

Writing · Multi-model (OpenAI / Anthropic via API)

7.2

Templated AI copywriter for blogs, ads, and outbound emails.

Seventh Sense

Writing · Proprietary engagement models

7.2

AI send-time optimization and orchestration layer that sits on top of HubSpot and Marketo.

GPT for Sheets

Writing · Multi-model (GPT, Claude, Gemini, Grok, DeepSeek, Mistral, OpenRouter)

7.1

Bulk AI prompts inside Google Sheets, Docs, Slides, Forms and Gmail with 50+ frontier models.

Rytr

Writing · Undisclosed

7.1

Budget AI writing assistant covering 40+ short-form copy use cases with a usable free tier.

Compose AI

Writing

7.0

Chrome extension that adds Gmail-style AI autocomplete to virtually any text field in the browser.

GPT for Gmail

Writing · Multi-model (GPT-4o, Claude, Gemini, Mistral, Perplexity)

7.0

Multi-model AI sidebar that drafts, translates, and summarizes inside Gmail.

HyperWrite

Writing · Multi-model (undisclosed)

7.0

Browser-based AI writing assistant with autocomplete, persona-matching, and integrated research citations.

Jacquard (formerly Phrasee)

Writing · Proprietary 'Language2' architecture

7.0

Enterprise AI copywriting platform that generates and optimizes brand-compliant marketing messages at scale.

Jetwriter AI

Writing · Multi-model (GPT-5, Claude Opus/Sonnet, Gemini Pro)

7.0

Browser-based AI writing assistant that lives in Gmail, WhatsApp, LinkedIn, and Outlook and learns your past replies.

Fynk

Writing

6.9

AI-assisted contract lifecycle management with eIDAS-grade e-signatures and risk flagging built in.

Jetwriter AI

Writing · Multi-model (GPT-5, Claude Opus/Sonnet, Gemini Pro)

6.9

Multi-model AI writing assistant that lives inside Gmail, LinkedIn, WhatsApp Web, and any other tab.

Merlin AI

Writing · Multi-model (GPT-4o, Claude 3.7, Gemini 2.5, Llama 3.1, Mistral, Deepseek)

6.9

Browser-based multi-model AI assistant that puts GPT-4, Claude, and Gemini one keystroke away on any webpage.

PaletteBrain

Writing · OpenAI (BYO key); Azure OpenAI supported

6.9

macOS keyboard launcher that pipes selected text in any app to ChatGPT via your own OpenAI key.

EmailTriager

Writing · Proprietary (True Voice, per-user fine-tuned)

6.8

Background AI that drafts Gmail replies in your own voice while you sleep.

Lex

Writing · Multi-model (GPT-4.1, Claude)

6.8

Google Docs-style writing app with an LLM sidekick wired into every sentence.

PressPulse AI

Writing

6.8

AI-curated HARO and journalist-query matching with auto-drafted pitches for PR-hungry experts.

RapidTextAI

Writing · GPT-5, Claude, Grok, Gemini, Deepseek

6.8

Budget AI copywriting workspace with 45+ templates for blogs, ads, and ecommerce listings.

Lavender

Writing · Multi-model (OpenAI + fine-tuned in-house LLMs)

6.7

AI email coach that grades and rewrites sales outreach in real time, inside your inbox.

WritingMate.ai

Writing · Multi-model (GPT-4, GPT-3.5, Claude)

6.7

Browser-side AI copilot that drops GPT-4 and Claude into Gmail, LinkedIn, and any web text field.

Granola

Writing

AI notepad for back-to-back meetings — captures audio locally, drafts structured notes

Propi

Writing

AI-generated client proposals with tracking and e-signature