Email Startups

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

9 investors

Posterous offered an email-based blogging platform that let people publish posts by sending an email. Its Posterous Spaces product added privacy controls for selectively sharing content across multiple platforms.

7 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.

6 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.

4 investors

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

4 investors

Mailgun is a developer-focused email delivery platform that lets companies send, receive, and track transactional and marketing emails through an API. It serves developers and businesses needing email deliverability infrastructure.

4 investors

Rapportive is a browser tool that displays contact details—photo, location, role, and social profiles—directly inside the user's email inbox, letting people learn about and connect with their contacts. It functions as a relationship-management add-on for email, including LinkedIn connections.

4 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.

3 investors

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.

2 investors

Hive is a marketing automation platform for event marketers, handling email, SMS, and ad campaigns along with CRM and audience segmentation. It serves event promoters, festivals, venues, and event-centric brands across North America, integrating with partners like Ticketmaster and Shopify to ingest customer data in real time.

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

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.

2 investors

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.

2 investors

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.

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

Fira is an AI-powered financial research platform that helps analysts and investors query and analyze complex financial documents, SEC filings, and internal data. The platform enables users to conduct comparative valuation analysis, reconcile financial statements, and generate cited answers across hundreds of documents for finance professionals.

1 investor

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

Glider provides software that organizes the deal and contract process, used by companies ranging from large public firms to small businesses. It also filters distracting emails away from users' inboxes.

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

MailTime builds a mobile email client that presents emails in a conversational, text-message-style interface, along with an AI feature for drafting and proofreading emails. It targets individual consumers looking for a faster way to handle email on mobile.

1 investor

Polymail is an email platform for sales teams that includes email tracking, Salesforce sync, and calendar scheduling to help increase conversion and shorten sales cycles, while giving executives visibility into sales activity. It serves business sales communication in the sales productivity software category.

1 investor

Post.fm built a new type of email inbox. The company was part of Y Combinator's Summer 2010 batch and is now inactive.

1 investor

reMail was a YC-backed (W09) email company that was acquired by Google in 2010. The page reads as a personal bio of the founder rather than an active company site.

1 investor

Slik builds an automated sales development tool that handles prospecting for sales teams, using machine learning trained on a company's own data to act as an automated SDR.

1 investor