Top 29 Hi AI Alternatives in 2026

AImReply auto‑generates email drafts and replies in up to 17 languages, offering 12 tones and three length options. It delivers real‑time edits and AI suggestions, streamlining composition for professionals, support agents, academics, and entrepreneurs—no login needed.

Harveyai is a native AI email assistant tool that helps professionals write better contextualized email replies faster with technical support and free trial.

Instantly.ai is a cold email software that uses AI technology and personalization to increase response rates and drive new business.

Voilà AI Assistant is a cross‑platform browser extension, desktop, and mobile app that uses GPT‑5 to summarize, rewrite, translate, and auto‑reply to emails, chats, PDFs, spreadsheets, and YouTube transcripts, while correcting spelling, grammar, tone and generating images from text.

Hix.ai is a versatile AI writing platform featuring tools like Articlegpt and Browsergpt for optimized article generation and smooth web integration, respectively, enhancing writing productivity and search engine optimization.

Canary Mail unifies multiple email accounts across Mac, iOS, Android, and Windows in a single inbox. AI drafts replies, summarizes threads, auto‑categorizes mail, and offers read receipts, snooze, templates, and secure PGP/HIPAA‑compliant encryption for enterprise‑grade privacy.

HiWriter is an AI-powered email generator that creates personalized and appropriate emails with various features and supports multiple languages.

MailReply streamlines email management by crafting contextual responses to your incoming emails, saving time and adding a professional touch to your email correspondence. Compatible with both Windows and MacOS, MailReply generates context-aware email responses and allows for customization to match your preferences.

PulseMail is an AI-powered email assistant that optimizes inbox management through smart responses, prioritization, meeting handling, and automation. It provides personalized messages, analytics, and seamless integration with existing tools for enhanced communication efficiency.

Emailor generates structured email drafts from a brief intent, audience context, and desired action in seconds. It allows tone, urgency, and relationship customization, supports multiple languages, and offers ready‑made templates for sales, support, and HR communications.

AI Mail Assistant is a Gmail add‑on that uses GPT‑4o to automate email tasks: it generates concise replies, summarizes long messages, translates 13 languages, provides grammar checks, auto‑labels and archives emails, and flags tone issues.

Inbox AI is a voice-driven automation tool for macOS that streamlines email management and task processing. It integrates with Apple Mail for smart actions, supports custom voice assistants, and ensures privacy through on-device processing.

AI Mail Assistant integrates with Gmail to auto‑generate replies, summarize threads, correct grammar and tone, translate into 13 languages, and flag ethical concerns—all without an OpenAI account—saving professionals time and improving email clarity.

AI Email Writer utilizes GPT-4 technology to accelerate email composition, offering customizable templates and smart suggestions for Gmail and Outlook. It allows users to adapt writing styles, improving productivity while maintaining effective communication for various contexts.

Inboxly aggregates email, social media, and messaging into one inbox, auto‑organizing and prioritizing content. AI drafts replies, cuts response time, and sends a daily digest for a quick channel overview, saving users time and streamlining outreach.

Serif streamlines email management by automating replies, scheduling, and organizing messages, reducing processing time by up to 50%. It integrates with Gmail and Outlook, allowing efficient task delegation and easy access to pre-written responses.

Mails.ai automates cold‑email campaigns—creating, sending, and scheduling follow‑ups—while supporting unlimited Gmail, Outlook, Zoho, or custom SMTP accounts. It verifies addresses, warms mailboxes, generates personalized AI copy, rotates inboxes for deliverability, tracks contacts, reports, and offers team collaboration.

Fyxer streamlines email management by auto‑labeling and filtering spam, generating draft replies in your voice, summarizing meetings, and syncing Gmail/Outlook calendars. It supports single/multi‑inbox setups for teams, cutting admin time.

Eloquens AI is a smart email assistant that automates routine emails, books appointments, and filters spam in 160+ languages. It learns user preferences, operates continuously, and provides performance analytics.

HiJiffy Guest Communications Hub delivers real‑time AI responses to guest inquiries across web, social media, and WhatsApp. It syncs with PMS to automate pre‑check‑in, key distribution, room updates, and virtual concierge services, reducing call volume and streamlining operations.

Reply.io automates personalized cold email and LinkedIn outreach, using AI-driven customization and real‑time B2B contact data. It offers multichannel sequences, inbox‑optimization tools, API integration, and meeting‑scheduling to streamline lead qualification and accelerate sales pipelines.

Dear Ai is an AI-powered tool that simplifies letter writing by providing personalized templates and tone control. With features like scheduling and upcoming integrations for social media and handwritten cards, it saves time while maintaining authenticity.

Boost your email writing efficiency with Email Whisperer, an AI tool for Gmail and Outlook. Enhance clarity, fix errors, and personalize your tone for error-free, customized emails. Speed up your workflow and automate email composition effortlessly.

Quickmail AI is an AI-driven email assistant that generates professional emails quickly from brief prompts. It enhances productivity by reducing writing time and allows users to customize content to fit their style, supporting efficient email management.

Ellie is a browser extension that auto‑drafts and categorizes emails, learning from your recent 200 messages to match tone. It supports multilingual replies, role‑based responses, and integrates with Gmail, Outlook Web, and Fastmail while respecting privacy.

Filo Mail is an AI-powered email client for Gmail that summarizes emails, organizes messages with smart labels, identifies tasks, and generates tailored responses. It prioritizes user data security and adapts through regular feature updates.

Hoory AI unifies live chat, email, WhatsApp, Telegram, and more into a single omnichannel inbox. It offers a no‑code chatbot builder, AI assistant trained on custom knowledge bases, and automated ticket resolution for 24/7 global support across diverse industries.

GhostWrite generates draft emails from concise prompts, offering subject‑line suggestions and template recognition. Users preview, edit, and approve drafts, while the system learns from edits to improve future suggestions. No auto‑sending; secure, lightweight web interface.

Inbox Zero is an AI‑powered assistant for Gmail and Outlook that auto‑labels mail, drafts replies in the user’s voice, bulk unsubscribes, and syncs with calendars and CRM. It offers privacy‑centric, self‑hostable code and inbox analytics.