Best AI tools for< Write Email Subject Lines >
20 - AI tool Sites

EmailComposer.ai
EmailComposer.ai is a GPT-3 OpenAI powered generative AI email writing tool that helps you create compelling and effective emails in minutes. It is designed to assist users in crafting persuasive and engaging email marketing copy, press releases, and other written content. The tool provides a range of templates and frameworks to guide users through the writing process, making it accessible to individuals of all skill levels. EmailComposer.ai emphasizes the importance of human editing to ensure the quality and accuracy of the generated content.

Phrasee
Phrasee is a generative AI platform that helps enterprise marketers create and optimize marketing messages across various channels, including email, SMS, push notifications, web and app, and social media. It uses AI to generate billions of marketing messages tailored to specific audiences and brands, ensuring consistent experiences and maximizing customer engagement. Phrasee's platform provides marketers with tools for testing, optimizing, and personalizing content, enabling them to improve performance, conversions, and ROI.

Bibit AI
Bibit AI is a real estate marketing AI designed to enhance the efficiency and effectiveness of real estate marketing and sales. It can help create listings, descriptions, and property content, and offers a host of other features. Bibit AI is the world's first AI for Real Estate. We are transforming the real estate industry by boosting efficiency and simplifying tasks like listing creation and content generation.

Content Robot
Content Robot is an AI-powered content and image generator that helps users create high-quality, SEO-optimized content for their websites, blogs, and social media. The tool offers a wide range of templates and features to help users generate unique and engaging content quickly and easily. Content Robot is also affordable and easy to use, making it a great option for businesses of all sizes.

Subject Line Generator
The Subject Line Generator is a user-friendly tool designed to help users create engaging email subject lines quickly and effortlessly. By simply inputting information about the email content, users can generate 10 creative subject line ideas in seconds. The tool offers options for different tones of voice, such as formal, informal, humorous, serious, optimistic, motivating, respectful, assertive, and conversational. Users can also choose to include emojis in their subject lines to add a fun and personalized touch. The tool is free to use and aims to boost email open rates while saving users time and effort. It is created with care and attention to detail by Newsletter Pilot.

Mailscribe
Mailscribe is an AI-powered email marketing and automation tool that helps businesses automate email campaigns and increase engagement rates. With advanced machine learning algorithms, Mailscribe optimizes email content, subject lines, and send times for maximum impact. The platform offers features such as an all-in-one email marketing platform, automation tools, subscriber segment management, AI assistant, AI painter, analytics, collaboration, drag & drop email template builder, AI email generator, and email & marketing automation. Mailscribe simplifies email creation, improves email marketing strategies, and provides real-time insights to enhance email campaigns.

Notification Harbor
Notification Harbor is an email marketing platform that uses Large Language Models (LLMs) to help businesses create and send more effective email campaigns. With Notification Harbor, businesses can use LLMs to generate personalized email content, optimize subject lines, and even create entire email campaigns from scratch. Notification Harbor is designed to make email marketing easier and more effective for businesses of all sizes.

PromptFolder
PromptFolder is the ultimate AI prompt manager designed for ChatGPT, Midjourney, and more. It allows users to generate engaging subject lines for emails, brainstorm ideas, and utilize an advanced editor for content creation. With features like folder organization, prompt customization, and seamless integration with ChatGPT, PromptFolder enhances productivity and creativity in writing tasks.

Ortto
Ortto is a customer relationship management (CRM) and marketing automation platform that helps businesses manage their customer data, create automated marketing campaigns, and track their results. Ortto's AI-powered features include an AI subject line writer, AI-powered live chat, and an AI-powered omnichannel inbox. Ortto integrates with a variety of other business applications, including Salesforce, Shopify, and Stripe.

Sentient.email
Sentient.email is an AI-powered email automation tool designed to help users manage and respond to emails efficiently. It leverages proprietary AI technology for semantic search and sentiment analysis to streamline inbox management, prioritize essential communications, and automate thoughtful responses. The tool offers features like simple AI assistance, consistent replies, customization of responses, and filtering emails by subject and tone. With a commitment to efficient and effective email communication, Sentient.email aims to save users time and enhance productivity in handling email correspondence.

Writetone
Writetone is an AI-powered writing assistant that helps users write in a variety of tones, from formal to informal, persuasive to informative, and creative to engaging. It offers a range of features to help users improve their writing skills, including a paraphrasing tool, co-writer, summarizer, grammar checker, text-to-voice tool, and subject matter expert. Writetone is available as a Chrome extension and MS Word add-in, and it offers a variety of resources to help users get started, including blogs, guides, tutorials, and free templates.

Whisper Memos
Whisper Memos is an application that allows users to record voice memos and have them transcribed into text. The app uses artificial intelligence to generate an emoji or two for the subject of the memo, and to divide the text into paragraphs. Whisper Memos also has a private mode, which allows users to opt-out of storing transcripts in their account.

Helper.email
Helper.email is an AI-powered email assistant that helps you write better emails, summarize long threads, and more. It's easy to use - just send your OpenAI API key to [email protected] to get started. Helper.email is a great tool for anyone who wants to save time and improve their email communication.

AI Email Writer
This free AI email writer is a powerful tool that can help you quickly and easily draft replies to any email. With its advanced AI technology, the email writer can analyze the content of your email and generate a personalized response that is both professional and engaging. Whether you're dealing with a customer inquiry, a sales pitch, or a personal message, the AI email writer can help you save time and effort while ensuring that your emails are always on point.

Warmer.ai
Warmer.ai is an AI-powered email writing tool that helps users personalize their cold emails in seconds. It analyzes a prospect's LinkedIn profile and website to generate highly personalized emails that are more likely to get a response. Warmer.ai is easy to use and can help users save time and improve their email marketing results.

Ready to Send
Ready to Send is an AI-powered Gmail assistant that automates the process of generating personalized email responses. It seamlessly integrates with Gmail to provide lightning-fast email replies, personalized and editable responses, and privacy-centric handling of sensitive data. The application leverages AI technology to craft contextual responses in the user's voice, transforming inbox management from a chore to a delight. With support for multiple languages and advanced language models, Ready to Send offers a secure and efficient solution for enhancing email productivity.

EmailMagic AI
EmailMagic AI is an AI-powered email writing tool that helps users create emails faster, generate responsive email replies, and communicate in any language. It analyzes email data to match the user's writing style and preferences, enabling personalized email generation. EmailMagic AI offers a 7-day free trial, with paid subscription plans available for continued use. It prioritizes data security and does not read user emails. The tool is compatible with Gmail and allows users to revise emails up to 5 times.

ChatGPT Writer
ChatGPT Writer is a free browser extension that helps users write emails, messages, and other text-based content using the power of AI. It can be used on any website and supports all languages. The extension offers a variety of features, including the ability to generate replies to emails and messages, fix grammar and spelling mistakes, rephrase text, change writing tone, summarize text, and translate text. ChatGPT Writer is also secure and privacy-friendly, and does not store any user data on its servers.

Grammarly
Grammarly is an AI-powered writing assistant that helps users improve their writing. It offers a range of features, including a grammar checker, plagiarism checker, and writing suggestions. Grammarly is available as a desktop app, browser extension, and mobile app.

Linguix
Linguix is an AI-powered writing assistant that helps you write better in English. It checks your grammar, spelling, and style, and provides suggestions to improve your writing. Linguix also has a built-in translator, so you can translate your writing into over 100 languages.
20 - Open Source AI Tools

swarms
Swarms provides simple, reliable, and agile tools to create your own Swarm tailored to your specific needs. Currently, Swarms is being used in production by RBC, John Deere, and many AI startups.

npcsh
`npcsh` is a python-based command-line tool designed to integrate Large Language Models (LLMs) and Agents into one's daily workflow by making them available and easily configurable through the command line shell. It leverages the power of LLMs to understand natural language commands and questions, execute tasks, answer queries, and provide relevant information from local files and the web. Users can also build their own tools and call them like macros from the shell. `npcsh` allows users to take advantage of agents (i.e. NPCs) through a managed system, tailoring NPCs to specific tasks and workflows. The tool is extensible with Python, providing useful functions for interacting with LLMs, including explicit coverage for popular providers like ollama, anthropic, openai, gemini, deepseek, and openai-like providers. Users can set up a flask server to expose their NPC team for use as a backend service, run SQL models defined in their project, execute assembly lines, and verify the integrity of their NPC team's interrelations. Users can execute bash commands directly, use favorite command-line tools like VIM, Emacs, ipython, sqlite3, git, pipe the output of these commands to LLMs, or pass LLM results to bash commands.

PromptChains
ChatGPT Queue Prompts is a collection of prompt chains designed to enhance interactions with large language models like ChatGPT. These prompt chains help build context for the AI before performing specific tasks, improving performance. Users can copy and paste prompt chains into the ChatGPT Queue extension to process prompts in sequence. The repository includes example prompt chains for tasks like conducting AI company research, building SEO optimized blog posts, creating courses, revising resumes, enriching leads for CRM, personal finance document creation, workout and nutrition plans, marketing plans, and more.

LLPhant
LLPhant is a comprehensive PHP Generative AI Framework that provides a simple and powerful way to build apps. It supports Symfony and Laravel and offers a wide range of features, including text generation, chatbots, text summarization, and more. LLPhant is compatible with OpenAI and Ollama and can be used to perform a variety of tasks, including creating semantic search, chatbots, personalized content, and text summarization.

DelphiOpenAI
Delphi OpenAI API is an unofficial library providing Delphi implementation over OpenAI public API. It allows users to access various models, make completions, chat conversations, generate images, and call functions using OpenAI service. The library aims to facilitate tasks such as content generation, semantic search, and classification through AI models. Users can fine-tune models, work with natural language processing, and apply reinforcement learning methods for diverse applications.

LLPhant
LLPhant is a comprehensive PHP Generative AI Framework designed to be simple yet powerful, compatible with Symfony and Laravel. It supports various LLMs like OpenAI, Anthropic, Mistral, Ollama, and services compatible with OpenAI API. The framework enables tasks such as semantic search, chatbots, personalized content creation, text summarization, personal shopper creation, autonomous AI agents, and coding tool assistance. It provides tools for generating text, images, speech-to-text transcription, and customizing system messages for question answering. LLPhant also offers features for embeddings, vector stores, document stores, and question answering with various query transformations and reranking techniques.

ColossalAI
Colossal-AI is a deep learning system for large-scale parallel training. It provides a unified interface to scale sequential code of model training to distributed environments. Colossal-AI supports parallel training methods such as data, pipeline, tensor, and sequence parallelism and is integrated with heterogeneous training and zero redundancy optimizer.

nlp-llms-resources
The 'nlp-llms-resources' repository is a comprehensive resource list for Natural Language Processing (NLP) and Large Language Models (LLMs). It covers a wide range of topics including traditional NLP datasets, data acquisition, libraries for NLP, neural networks, sentiment analysis, optical character recognition, information extraction, semantics, topic modeling, multilingual NLP, domain-specific LLMs, vector databases, ethics, costing, books, courses, surveys, aggregators, newsletters, papers, conferences, and societies. The repository provides valuable information and resources for individuals interested in NLP and LLMs.

kairon
Kairon is an open-source conversational digital transformation platform that helps build LLM-based digital assistants at scale. It provides a no-coding web interface for adapting, training, testing, and maintaining AI assistants. Kairon focuses on pre-processing data for chatbots, including question augmentation, knowledge graph generation, and post-processing metrics. It offers end-to-end lifecycle management, low-code/no-code interface, secure script injection, telemetry monitoring, chat client designer, analytics module, and real-time struggle analytics. Kairon is suitable for teams and individuals looking for an easy interface to create, train, test, and deploy digital assistants.

chatgpt-universe
ChatGPT is a large language model that can generate human-like text, translate languages, write different kinds of creative content, and answer your questions in a conversational way. It is trained on a massive amount of text data, and it is able to understand and respond to a wide range of natural language prompts. Here are 5 jobs suitable for this tool, in lowercase letters: 1. content writer 2. chatbot assistant 3. language translator 4. creative writer 5. researcher

awesome-generative-ai
Awesome Generative AI is a curated list of modern Generative Artificial Intelligence projects and services. Generative AI technology creates original content like images, sounds, and texts using machine learning algorithms trained on large data sets. It can produce unique and realistic outputs such as photorealistic images, digital art, music, and writing. The repo covers a wide range of applications in art, entertainment, marketing, academia, and computer science.

SurveyX
SurveyX is an advanced academic survey automation system that leverages Large Language Models (LLMs) to generate high-quality, domain-specific academic papers and surveys. Users can request comprehensive academic papers or surveys tailored to specific topics by providing a paper title and keywords for literature retrieval. The system streamlines academic research by automating paper creation, saving users time and effort in compiling research content.

invariant
Invariant Analyzer is an open-source scanner designed for LLM-based AI agents to find bugs, vulnerabilities, and security threats. It scans agent execution traces to identify issues like looping behavior, data leaks, prompt injections, and unsafe code execution. The tool offers a library of built-in checkers, an expressive policy language, data flow analysis, real-time monitoring, and extensible architecture for custom checkers. It helps developers debug AI agents, scan for security violations, and prevent security issues and data breaches during runtime. The analyzer leverages deep contextual understanding and a purpose-built rule matching engine for security policy enforcement.

gitleaks
Gitleaks is a tool for detecting secrets like passwords, API keys, and tokens in git repos, files, and whatever else you wanna throw at it via stdin. It can be installed using Homebrew, Docker, or Go, and is available in binary form for many popular platforms and OS types. Gitleaks can be implemented as a pre-commit hook directly in your repo or as a GitHub action. It offers scanning modes for git repositories, directories, and stdin, and allows creating baselines for ignoring old findings. Gitleaks also provides configuration options for custom secret detection rules and supports features like decoding encoded text and generating reports in various formats.

instructor-php
Instructor for PHP is a library designed for structured data extraction in PHP, powered by Large Language Models (LLMs). It simplifies the process of extracting structured, validated data from unstructured text or chat sequences. Instructor enhances workflow by providing a response model, validation capabilities, and max retries for requests. It supports classes as response models and provides features like partial results, string input, extracting scalar and enum values, and specifying data models using PHP type hints or DocBlock comments. The library allows customization of validation and provides detailed event notifications during request processing. Instructor is compatible with PHP 8.2+ and leverages PHP reflection, Symfony components, and SaloonPHP for communication with LLM API providers.
20 - OpenAI Gpts

Copywriter GPT
Your innovative partner for viral ad copywriting! Dive into viral marketing strategies fine-tuned to your needs!

SpintaxGPT
I add spintax to emails for Instantly.ai. For more cold email tips, follow me on Twitter/𝕏 at @kenautoup

Prompt Muse
Extend the utility of readymade prompt libraries with your SMB's personalized prompt prefix.

⌲ Multilingual Greek Email Creator
Enter your message in any language and get a flawless Greek email, capturing your tone, and providing 3 compelling subject line options. #Greece #Translation

Email Subject Line Generator
Generate 25 attention-grabbing subject lines for your next email. Attracting user curiosity is the bait that wins the click.

Email Tailor
Crafts personalized email openers for companies. Just input a domain name, or a list of domain names.

B2B Email Writer Wizard
I help you compose emails based on email type, audience, and goals. GPT will ask many questions manually, so be ready to answer, or follow the prompt below to get DOC templates to make things easier

Taylor: Sales Email Assistant
Specialized in creating personalized, professional sales emails for SDRs and AEs.

E-Commerce Email Expert
Assists with personalized, effective email marketing for e-commerce, focusing on engaging content and trends.

📩 メール執筆・校正アシスタント【✅セキュリティ強化済み】
メールの作成・添削・返信の提案などを行います。メールの校正は、草案をそのままコピペするだけで可能です。件名・署名・添付ファイルなどを忘れないようリマインドも行います。さらにこのGPTは、特別な設定で「Use conversation data in your GPT to improve our models」の項目をOFFにしています。そのため、うっかり機密情報が含まれるメール文を送信してしまった場合でも、ChatGPTの学習に利用されないと思われます。 ※ただし、今後の仕様変更や他の経路からの情報漏洩などのリスクもありえます。個人情報は決して書き込まないでください。