Alternatives to Stamp

Slashy is an AI email client that drafts replies in your voice, chases follow-ups, and schedules meetings

Replai is an AI email assistant that learns your writing style and drafts replies in your own voice, plus inbox triage and meeting notes.

AI Gmail add-on that auto-drafts contextual email replies in your voice, ready for your review before sending

NOX is a macOS-only AI messaging inbox that unifies 10 chat platforms and drafts replies in your voice.

Cora is an autonomous AI email assistant that connects to Gmail, drafts replies in your voice, and sends you twice-daily briefs.

Jetwriter AI is a personalized AI writing assistant extension that drafts email and message replies in your voice across Gmail, Slack, LinkedIn, and other

Jace is an AI executive assistant that sits on top of Gmail and Outlook to organize your inbox, draft replies with full context, and run email-triggered

Shortwave is an AI email assistant for Gmail that triages, drafts, schedules, and searches your inbox with Claude 4.6 models.

Free Chrome extension that drafts email replies, Excel formulas, code, and marketing copy on any site via ⌘+U.

Spark Mail is a cross-platform AI email client that sorts, summarizes, and drafts across Gmail, Outlook, Exchange, iCloud, Yahoo, and IMAP.

Missive + AI folds GPT-powered summarize, translate, and reply drafting into a shared team inbox for email, SMS, WhatsApp, and chat.

Canary Mail is an AI email client with an on-device Copilot, PGP encryption, and a unified inbox for Mac, iOS, Windows, and Android.

Shortwave is an AI email assistant and native client where Claude 4.6 agents manage triage, drafting, scheduling, and search in your inbox.

AI-first email app that turns your inbox into a chat-style hub for email, docs, tasks, and calls

AI email assistant and tracking extension that runs inside Apple Mail, Gmail, and Outlook instead of replacing your inbox.

Free email with AI compose, thread summaries, and a Planner that turns messages into tasks and calendar events.

Mailopoly is an AI email assistant that folds email and business messaging into one Poly-powered inbox.

AI email rewriting tool for Gmail, Outlook, LinkedIn, and iOS with custom tones and Quick Replies.

superReply is a Chrome extension that generates tone-matched AI email replies inside Gmail and Outlook Web. Free up to 90 replies a month.

Buzz Mail drafts professional Gmail replies from a one-click add-on, billed by pay-per-use word credits you share across a family or small team.

Superhuman is AI email, docs, and a proactive Go assistant whose agents run inside Slack and your other work apps.

AI email assistant that triages your inbox and drafts replies for $8.25/month.

Scape is a Mac email client that drafts your replies and records meetings locally.

A Google Workspace Marketplace add-on that turns bullet notes into polished Gmail drafts using Gemini, inside the tab you already have open.

Avec turns Gmail into a swipeable task stack with hold-to-talk voice compose on iPhone.

Gmail's Gemini 3 rebuild turns your inbox into a question-answering, thread-summarizing assistant

AI sales agent that reads your staffing ATS and client book to flag when past and target employers are hiring again.

Saner is an AI personal assistant for ADHD that turns emails, notes, to-dos, and files into one searchable Smart Inbox.

SaneBox AI email management sorts your inbox into smart folders so you waste fewer hours on low-priority mail.

Floatboat turns your calendar into an agent runtime that preps briefs, drafts, and follow-ups before you sit down.