Communication & Email

Slack is a cloud-based team communication and collaboration platform organized around channels, direct messages, and threads, widely used in businesse

Webex is Cisco's enterprise-grade unified collaboration suite covering video meetings, team messaging, calling, webinars, and events in a single platf

Cal.com is an open-source (AGPLv3) scheduling infrastructure platform — a self-hostable Calendly alternative — that lets individuals and teams share b

Microsoft Teams is Microsoft's integrated collaboration platform combining persistent chat, video meetings, file co-authoring, and team channels withi

Thunderbird is Mozilla's free, open-source desktop email client for Windows, macOS, and Linux that manages multiple email accounts, calendars, contact

A full-featured desktop email client for Windows and macOS that manages email, calendar, tasks, contacts, notes, and chat — including Slack and Micros

Signal is a free, open-source, end-to-end encrypted messaging app for iOS, Android, and desktop that supports text, voice notes, images, video, file s

Telegram is a cloud-based instant messaging platform supporting text, voice, video, and file transfers up to 2 GB per file across unlimited devices si

WhatsApp is Meta's end-to-end encrypted messaging and calling app used by over 2 billion people worldwide for text, voice, video, file sharing, and gr

Notion Calendar is a free, unified calendar app from Notion that combines Google Calendar events with Notion database items (tasks, projects, timeline

Inbox AI is a Mac application that combines AI-driven email automation with a universal AI assistant accessible via hotkey from any app. It can flag c

Fastmail is a privacy-focused, paid email service that offers email, calendar, contacts, notes, and file storage with no ads and no data mining — user

ChatHelp.ai is an all-in-one AI business assistant platform that provides a customizable website chat widget for 24/7 customer support, lead capture,

Insighto.ai is a no-code AI chatbot and voice agent platform available on AppSumo that deploys conversational agents for customer support, sales, and

Canary Mail is a privacy-first email client for macOS, iOS, and Android that offers automatic end-to-end encryption, invisible tracker blocking, and a

SenderStack is an AI email assistant delivered as a Chrome extension that learns your writing style from your connected Gmail or Outlook account and d

Snoooz AI is an AI-powered email assistant that automates out-of-office and inbox management workflows for Gmail, Outlook, Apple Mail, Yahoo, and othe

BusyCal is a full-featured calendar app for macOS and iOS that goes well beyond Apple Calendar with customizable views (Day/Week/Month/Year Planner/Li

Zoom is a cloud-based video conferencing and collaboration platform supporting HD video meetings, team chat, webinars, whiteboards, and phone — free f

HelloFax (now rebranded as Dropbox Fax) is an online fax service that lets users send and receive faxes from any device without a fax machine, deliver

Jamy (jamy.ai) is an AI meeting note-taker available on AppSumo that automatically joins Google Meet, Zoom, and Teams calls to transcribe, summarize,

Reclaim is an AI calendar assistant for Google Calendar and Outlook that automatically schedules tasks, focus time blocks, habits, and meetings around

Fluent (fluenthq.com) is an AI-powered automated reporting platform built specifically for marketing agencies. It connects to ad and analytics platfor

Spark Mail is Readdle's cross-platform email client (macOS, Windows, iOS, Android) built around a Smart Inbox that automatically separates newsletters

Mailbird is a Windows (and Mac) desktop email client that unifies multiple Gmail, Outlook, Exchange, and IMAP accounts into a single unified inbox wit

Pencil'd is an AI-powered virtual receptionist service built for small service businesses such as plumbers, cleaners, landscapers, and painters that f

Meet Oscar is an AI email assistant for Gmail that writes accurate, on-brand replies by drawing on a knowledge base the user builds from uploaded PDFs

Mail Archiver X by Moth Software is a macOS email archiving application that exports and stores messages from Apple Mail, Outlook, Postbox, Thunderbir

Emailit is a developer-focused email delivery service that provides both REST API and SMTP relay for sending transactional and marketing emails. It su

Agenda is a date-focused note-taking app for Mac, iPhone, and iPad that links notes to specific calendar events and dates, giving users a chronologica

Cisdem ContactsMate is a Mac contacts manager that aggregates contacts from macOS Contacts, iCloud, Google, Outlook, Exchange, Yahoo, and AOL into a s

Amie is a productivity app that unifies calendar, tasks, contacts CRM, and AI meeting notes into a single joyful interface for Mac and iOS. It lets us

Answerly is an AI chatbot platform for 24/7 customer support that trains strictly on your own data — websites, Google Docs, Google Sheets, or uploaded

BusyContacts is a professional contact manager for macOS that combines multi-column list views, tag-based filtering, and an Activity List showing emai

Chrome Tab Reminder is a browser extension that lets you set time-based reminders to revisit any website tab, with quick presets (1 minute to 1 hour)