More in APIs & Messaging
10TwilioProgrammable voice, SMS, and email
SendGridTransactional email at scale
AgoraReal-time voice and video APIs
AblyRealtime infrastructure for developers
PusherHosted websockets for apps
BirdOmnichannel messaging, ex-MessageBird
ResendEmail API developers enjoy
AlgoliaSearch-as-a-service standard
MeilisearchOpen-source instant search
RingCentralCloud phone system standard
More in Email & Calendar
10FastmailIndependent email done properly
HEYOpinionated email from 37signals
ZohoThe bootstrapped software suite
MissiveTeam email and chat in one
Notion CalendarCalendar with Notion superpowers
TutaEncrypted German email
ShortwaveAI email from ex-Googlers
Spark MailEmail by Readdle
MimestreamNative Gmail for Mac
Mailbox.orgPrivate German email