Communications/email/SMS

Twilio, Inc.twilio.comCommunications/email/SMS

Build amazing customer experiences on the Twilio platform with APIs for SMS, RCS, voice, and email, plus conversational AI for smarter engagement, and identity verification for trust.

Postmarkpostmarkapp.comCommunications/email/SMS

Send transactional and marketing emails and get them to the inbox on time, every time. Postmark is a fast and reliable email delivery service for developers.

Mailgun Technologies, Inc.mailgun.comCommunications/email/SMS

Powerful Transactional Email APIs that enable you to send, receive, and track emails, built with developers in mind. Learn more today!

Segmentsegment.comCommunications/email/SMS

Collect, unify, and enrich customer data across any app or device with the Twilio Segment CDP, now available on Twilio.com.

sendgrid.comCommunications/email/SMS

SendGrid's trusted email API and marketing campaigns platform is now available through Twilio.com.

Resendresend.comCommunications/email/SMS

The best way to reach humans instead of spam folders. Deliver transactional and marketing emails at scale.

pusher.comCommunications/email/SMS

Simple, scalable and reliable. Hosted realtime APIs loved by developers and trusted by giants. Build live dashboards, notifications, geotracking, chat and more.

ZeroBouncezerobounce.netCommunications/email/SMS

Optimize your email strategy with ZeroBounce.

Segment.io, Inc.segment.ioCommunications/email/SMS

Collect, unify, and enrich customer data across any app or device with the Twilio Segment CDP, now available on Twilio.com.

Knock Labs, Inc.knock.appCommunications/email/SMS

Knock is customer engagement infrastructure for your product, marketing, and transactional messaging. Activate your data, ship cross-channel messaging, and accelerate growth.

Couriercourier.comCommunications/email/SMS

The messaging platform for humans and AI agents. Send multichannel notifications across email, push, SMS, Slack, and more, with journeys and preferences built in.

Loops.soloops.soCommunications/email/SMS

Loops is email marketing software for SaaS teams to send marketing, lifecycle, and transactional email from one product. Free to start.

Nylasnylas.comCommunications/email/SMS

Nylas API lets you integrate with 250+ email, calendar and meeting providers (including Gmail, Microsoft, IMAP, Zoom and others) in 5 minutes. We also provide agent accounts for giving unique identities to your AI Agents under the same API platform.

Vonage Business, Inc.vonage.comCommunications/email/SMS

Vonage offers flexible and scalable voice, messaging, video and data capabilities across Unified Communications, Contact Centers and Communications APIs.

Bird.com Inc. Provides Sparkpost, an email delivery provider. United Statesbird.comCommunications/email/SMS

Send Email, SMS, WhatsApp, Apple Messages, and Voice with Bird. Build with MCP, CLI and SDKs, automate journeys, and track delivery.

Sinchsinch.comCommunications/email/SMS

Unlock meaningful conversations across the customer journey with programmable SMS, voice, email, video, & verification APIs!

ably.comCommunications/email/SMS

Ably is the realtime platform built for scale and reliability. Power live chat, messaging, collaborative apps, and AI experiences that never drop.

MessageBird USA, Incmessagebird.comCommunications/email/SMS

Send and receive across email, SMS, WhatsApp, and voice. One API, one contract, on the network that already carries 40% of the world's commercial messages.

Clickatell, Inc.clickatell.comCommunications/email/SMS

Be part of the Chat Commerce & customer engagement mobile revolution with Clickatell's range of products & solutions. Build revenue and customer engagement now!

CometChatcometchat.comCommunications/email/SMS

Build real time chat, voice and video calling experience with CometChat's flexible SDKs, APIs & UI Kits. Sign up now!

GovDeliverygranicus.comCommunications/email/SMS

Citizen Experience Platform Transforming How Governments Serve. Granicus technology connects 330M people & 7,000+ government organizations.

HelloFax (dropbox)hellofax.comCommunications/email/SMS

Send and receive faxes online with Dropbox Fax (formerly HelloFax). Fast, secure, and reliable faxing from any device. Start faxing for free today!

Instantly.aiinstantly.aiCommunications/email/SMS

Turn leads into clients with automated outreach, a B2B lead database, email deliverability tools, and an AI-powered CRM. Start free today.