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IMAP
IMAP (Internet Message Access Protocol) is a standard email protocol that allows email clients to access and manage email messages stored on a mail server. IMAP enables users to view and manage email from multiple devices while keeping messages synchronized on the server.
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Providers working in IMAP
Providers whose own tags share at least two of this topic's tags, most shared first — the top 30 of 47.
| Provider | About | Rating | APIs |
|---|---|---|---|
| AgentMail | AgentMail is an API-first email platform that gives AI agents their own email inboxes to autonomously send, receive, reply to, and act on email. Unlike traditional transactional email APIs built for one-way notifications, AgentMail is desi… | strong | 1 |
| SMTP | Simple Mail Transfer Protocol (SMTP) is the foundational internet standard for transmitting electronic mail across networks. Defined in RFC 5321 (October 2008), SMTP uses a command-response model over TCP port 25 (or 587 for submission, 46… | emerging | 2 |
| Customer.io | Customer.io is a customer engagement platform that combines a customer data platform, marketing automation, and messaging delivery to send behavior-triggered email, push, SMS, and in-app messages. Its API surface includes the Track API for… | exemplar | 4 |
| Brevo | Brevo (formerly Sendinblue) is a French customer-relationship platform that combines email marketing, transactional email and SMTP relay, transactional and campaign SMS, WhatsApp messaging, web and mobile push, live chat, a sales CRM, an e… | exemplar | 21 |
| Amazon Pinpoint | Amazon Pinpoint is a flexible and scalable outbound and inbound marketing communications service that enables you to engage with customers across multiple messaging channels including email, SMS, push notifications, and voice messages. Not… | exemplar | 2 |
| Infobip | Infobip is a global communications platform as a service (CPaaS) provider headquartered in Vodnjan, Croatia, and is Croatia's largest technology company. It sells programmable messaging, voice, video, email and customer engagement APIs on… | exemplar | 47 |
| Braze | Braze is a leading customer engagement platform providing REST APIs for managing user profiles, orchestrating multi-channel messaging campaigns, and exporting analytics. The platform supports email, SMS, push notifications, in-app messages… | exemplar | 1 |
| Amazon SES | Amazon Simple Email Service (SES) is AWS's cloud email platform for sending and receiving mail at scale — marketing, notification and transactional. The current contract is the SES v2 API (version 2019-09-27), an 86-operation REST-JSON ser… | exemplar | 2 |
| Nylas | Nylas connects your application to every email inbox and calendar in the world. The Nylas v3 platform provides REST APIs for email, calendar, contacts, scheduling, meeting notetaking, authentication, and administration across Google, Micro… | exemplar | 2 |
| Novu | Novu is the open-source notification infrastructure for developers. A single REST API and workflow engine route a triggered event across in-app inbox, email, SMS, push, chat (Slack / Discord / MS Teams / WhatsApp) and custom channels — wit… | exemplar | 1 |
| SendPulse | SendPulse is a multichannel marketing automation platform covering bulk email, SMTP transactional email, SMS, web push, website pop-ups, a CRM, an online course builder, and chatbots across WhatsApp, Telegram, Facebook Messenger, Instagram… | exemplar | 20 |
| SMTP2GO | SMTP2GO is a New Zealand-founded email and SMS delivery platform, running since 2006, that sends and tracks transactional and marketing messages over SMTP relay or a JSON REST API from data centres in the United States, the European Union… | exemplar | 1 |
| Paubox | Paubox is a HIPAA compliant, HITRUST certified email infrastructure company serving healthcare organizations in the United States. Its products encrypt outbound email without recipient portals, passwords, or plugins, and work alongside Goo… | exemplar | 3 |
| Knock | Knock is notifications infrastructure as a service — a product and customer messaging platform you use to power transactional, lifecycle, broadcast, and in-product messaging across email, SMS, push, in-app, in-app guides, chat (Slack / Dis… | exemplar | 13 |
| Postmark | Postmark is an email delivery service that helps businesses send and track transactional and broadcast email reliably, replacing SMTP with a scalable service that surfaces detailed delivery analytics, bounce tracking, open and click tracki… | exemplar | 3 |
| Zavu | Zavu is a unified multi-channel messaging platform that consolidates SMS, WhatsApp, Telegram, Email, Voice, and Messenger behind a single REST API, so developers integrate once instead of stitching together Twilio, Vonage, MessageBird and… | strong | 1 |
| Cordial | Cordial is a cross-channel marketing and customer data platform headquartered in San Diego, California, used by consumer brands to unify customer data and orchestrate personalized messaging across email, SMS/MMS, RCS, mobile app (push, in-… | strong | 2 |
| Dyspatch | Dyspatch is an email template management and production platform that lets marketing, design, and engineering teams build, collaborate on, approve, localize, and publish transactional and marketing messages without hand-coding HTML. Conten… | strong | 1 |
| MailerSend | MailerSend is a transactional email and SMS platform built for developers. Its v1 REST API covers email sending (single, bulk to 500 objects per request, and scheduled up to 72 hours out), SMTP relay, templates, sending domains and DNS ver… | strong | 1 |
| Insider | Insider (rebranded Insider One; useinsider.com now redirects to insiderone.com) is an AI-native customer engagement and personalization platform used by 2,000+ global brands. It unifies a Customer Data Platform, cross-channel journey orche… | strong | 18 |
| Amazon SNS | Amazon Simple Notification Service (SNS) is a fully managed messaging service for both application-to-application (A2A) and application-to-person (A2P) communication. It enables pub/sub, SMS, email, and mobile push notifications. | strong | 1 |
| Route Mobile | Route Mobile Limited is a Mumbai-headquartered cloud communications platform (CPaaS) provider and one of India's largest A2P messaging aggregators, listed on the BSE and NSE and now majority-owned by Belgium's Proximus Group, where it sits… | strong | 5 |
| Bluecore | Bluecore is a retail marketing technology platform that unifies shopper identity, behavior, and product data into a customer data platform with 20+ predictive AI models, cross-channel experience orchestration (email, SMS, site, paid media)… | developing | 3 |
| Fyno | Fyno is a notification routing and orchestration platform that provides a single unified REST API for sending and managing notifications across 10+ communication channels including email, SMS, push, WhatsApp, in-app, RCS, voice, and iMessa… | developing | 1 |
| CommsHarbor | Transactional email and permission-based marketing infrastructure with tenant isolation, deliverability tracking, CRM, and multi-tenant governance. Self-describes as an agent-first HTTP API with a hosted MCP server. | developing | 2 |
| Bird | Bird (formerly MessageBird) is an omnichannel customer communications platform offering REST APIs for email, SMS, WhatsApp, RCS, push notifications, voice, and data management. Trusted by more than 450,000 developers, Bird provides enterpr… | developing | 6 |
| FrontApp | Front is a customer service and communication platform that combines the efficiency of a help desk with the familiarity of email, giving teams a shared inbox across email, SMS, chat, and social channels. The Front Core API is a REST API (b… | developing | 1 |
| Missive | Missive is a team inbox and collaboration platform that brings email, SMS, WhatsApp, Instagram, Facebook Messenger, and live chat into one unified workspace. It provides a REST API for managing conversations, messages, contacts, labels, dr… | developing | 1 |
| Conversica | Conversica is an AI conversation automation company - "The Conversation Company" - whose Revenue Digital Assistants and AI Agents hold two-way, natural-language conversations with leads and customers over email, SMS and website chat to gen… | developing | 1 |
| Google Gmail | The Gmail API lets you view and manage Gmail mailbox data like threads, messages, and labels. It provides RESTful access to Gmail mailboxes, supporting message sending, drafting, organizing with labels, managing settings, and push notifica… | developing | 1 |
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EmailIMAPMessagingProtocol