Email Startups

Posterous provides a blogging platform that lets users publish content by sending emails, and offers privacy-controlled sharing features across multiple platforms.

4 investors

Mailgun provides an API platform that enables businesses to send, receive, and track transactional and marketing email messages.

3 investors

Rapportive displays contact information and social profiles directly within email clients, allowing users to view photos, locations, and professional details about message senders and connect with them on social networks.

3 investors

AgentMail provides an email inbox API that enables AI agents to create and manage their own email accounts. The platform serves developers building AI agents that need email communication capabilities.

2 investors

Compose.ai offers a Chrome extension that uses artificial intelligence to autocomplete text across web applications, functioning similarly to email autocompletion tools but with broader applicability.

2 investors

Forage Mail provides automated email filtering for Gmail accounts that separates low-priority messages and delivers a daily digest summary with condensed versions of newsletters, while allowing users to customize filtering rules across any email client.

2 investors

Mailwarm is a SaaS platform that automates email warmup and optimizes deliverability to help businesses improve inbox placement and sender reputation. The platform serves founders, sales teams, and agencies looking to send emails safely at scale and avoid spam filters.

2 investors

Zaymo provides interactive email blocks that enable customers to complete transactions, write reviews, and manage subscriptions directly within emails without leaving the email client. The platform offers no-code integration with existing email templates and marketing stacks, serving email marketers and brand marketing teams.

2 investors

Cedar provides sales automation software that helps account executives reduce administrative work on CRM tasks and deal management, allowing them to focus on selling for high-growth companies.

1 investor

Freestyle is an AI assistant for Gmail that automates email tasks including reply generation, meeting scheduling, newsletter management, and inbox search using natural language. It serves individual Gmail users seeking to reduce email management overhead.

1 investor

Glider helps businesses manage their contract workflows and reduce administrative overhead so teams can focus on core operations rather than manual contract handling. The platform serves organizations of all sizes across various industries.

1 investor

Hive provides marketing and event management software for live event promoters, helping clients send over 2.5 billion emails annually.

1 investor

Lightmeter helps B2B sales and marketing teams send emails at scale by providing email delivery services and mailserver automation. The company focuses on making the decentralized email network accessible to entrepreneurs through open standards and open source technology.

1 investor

Loops builds an email platform designed for software companies to manage customer communication and engagement.

1 investor

MailTime reformats email threads into chat-style conversations and separates personal communications from marketing messages and newsletters.

1 investor

Odo is an AI-powered email assistant that monitors inboxes, identifies important messages, generates daily briefings, and drafts email replies that match the user's writing style. It serves professionals and founders who want to reduce time spent on email triage and management.

1 investor

Polymail is an email inbox application for operators and deal-makers, offering features like read receipts, message scheduling, and collaborative thread management. The product targets entrepreneurs and high-volume email users seeking efficiency and clarity in business communications.

1 investor

Post.fm provides an alternative email inbox application.

1 investor

Proxis automates internal operations for enterprises by implementing AI across organizations, including onboarding non-technical employees onto AI tools, managing Claude Skills, and building private AI agents connected to a company's system of record with employee-level permissions. It serves teams across sales, marketing, go-to-market, and engineering functions.

1 investor

A mobile email application that stores email locally on iPhones and provides full-text search across messages.

1 investor

An AI tool that speeds up email management and processing for inbox users.

1 investor

Slik provides automation tools for sales teams to generate leads and identify prospects through email outreach.

1 investor

Threadable provides software for managing group email communications, designed to reduce clutter and increase the ability for teams to act on messages.

1 investor

Waypoint provides an email layer designed for software teams building SaaS products, marketplaces, and fintech applications. The company was launched in 2023 and focuses on simplifying product email integration.

1 investor