Communications Index
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The Top Communications Tools and Services Ranked By Stacks
Ranked by the number of tech stacks a tool is included in
1
Twilio
10.1K
Stacks
Bring voice and messaging to your web and mobile applications.
Voice and SMS
Visit Website
2
Twilio SendGrid
9.65K
Stacks
Email Delivery. Simplified.
Transactional Email
Visit Website
3
Amazon SES
9K
Stacks
Bulk and transactional email-sending service.
Transactional Email
Visit Website
4
Mailgun
7.37K
Stacks
The Email Service for Developers.
Transactional Email
Visit Website
5
Mandrill
4.42K
Stacks
Send transactional, triggered, and personalized email, then track results.
Transactional Email
Visit Website
6
Amazon SNS
1.3K
Stacks
Fully managed push messaging service
Mobile Push Messaging
Visit Website
7
WhatsApp
373
Stacks
A freeware, cross-platform messaging and Voice over IP service
Phone
Visit Website
8
OneSignal
321
Stacks
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
9
OneSignal
321
Stacks
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
10
Postmark
310
Stacks
Email delivery for web apps - done right.
Transactional Email
Visit Website
11
Telegram Bot API
305
Stacks
HTTP-based interface created for developers keen on building bots for Telegram
Chatbot Platforms & Tools
Visit Website
12
Firebase Cloud Messaging
256
Stacks
A cross-platform messaging solution
Mobile Push Messaging
Visit Website
13
Dialogflow
243
Stacks
Give users new ways to interact with your product by building engaging voice and text-based conve...
Chatbot Platforms & Tools
Visit Website
14
Mailjet
208
Stacks
Email delivery made easy
Transactional Email
Visit Website
15
Alexa
206
Stacks
A cloud-based voice service
Voice AI
Visit Website
16
Nexmo
177
Stacks
API for SMS, Voice and Phone Verification
Voice and SMS
Visit Website
17
Microsoft Bot Framework
165
Stacks
Connect intelligent bots that interact via text/sms, Skype, Slack, Office 365 mail and other popu...
Chatbot Platforms & Tools
Visit Website
18
IBM Watson
154
Stacks
A question-answering computer system capable of answering questions posed in natural language
Chatbot Platforms & Tools
Visit Website
19
Telegram API
148
Stacks
Build your own customized Telegram clients
Chat API
Visit Website
20
SparkPost
139
Stacks
Email Delivery and Analytics for Developers and Enterprises
Transactional Email
Visit Website
21
Postfix
130
Stacks
A free and open-source mail transfer agent
Email Deliverability
Visit Website
22
Messenger Platform
128
Stacks
Tools to help you build your bot and reach 900 million people around the world
Chatbot Platforms & Tools
Visit Website
23
SendBird
127
Stacks
A Complete Chat Platform, Messaging and Chat SDK and API
Communications SDK
Visit Website
24
Mailtrap
118
Stacks
Email Delivery Platform that delivers just in time.
 Great for businesses and individuals.
Transactional Email
Visit Website
25
LINE
115
Stacks
Get engaged in interactive conversations with LINE users
Communications SDK
Visit Website
26
Braze
110
Stacks
Customer engagement platform
Engagement/Lifecycle Marketing
Visit Website
27
Nodemailer
105
Stacks
A module for Node.js applications to allow email sending
Transactional Email
Visit Website
28
Agora
94
Stacks
The Real-Time Engagement platform for devs to integrate voice & video chat, interactive live stre...
Voice and SMS
Visit Website
29
Agora
94
Stacks
The Real-Time Engagement platform for devs to integrate voice & video chat, interactive live stre...
Voice and SMS
Visit Website
30
Amazon Lex
91
Stacks
Build conversational voice and text interfaces, using the same deep learning technologies as Alexa
Chatbot Platforms & Tools
Visit Website
31
Google Cloud Messaging
89
Stacks
Simple and reliable messaging to reach over a billion devices.
Mobile Push Messaging
Visit Website
32
RingCentral
82
Stacks
Cloud business phone systems that work the way you do.
Phone
Visit Website
33
Botpress
80
Stacks
Open-source conversational AI platform for enterprise automation
Chatbot Platforms & Tools
Visit Website
34
Api.ai
77
Stacks
Conversational interface platform for apps, devices, bots, and services.
Chatbot Platforms & Tools
Visit Website
35
Aircall
75
Stacks
The phone system for modern business
Phone
Visit Website
36
Botkit
75
Stacks
Building Blocks for Building Bots
Chatbot Platforms & Tools
Visit Website
37
Apple Push Notification Ser...
74
Stacks
A platform notification service
Web Push Notifications
Visit Website
38
Plivo
72
Stacks
API platform to build Voice & SMS Applications
Voice and SMS
Visit Website
39
Chatfuel
68
Stacks
Create chatbots easily — no coding required
Chatbot Platforms & Tools
Visit Website
40
Amazon Pinpoint
65
Stacks
Targeted Push Notifications for Mobile Apps
Mobile Push Messaging
Visit Website
41
MessageBird
64
Stacks
Making business communications feel as natural as communicating with friends.
Voice and SMS
Visit Website
42
Urban Airship
64
Stacks
Improve customer engagement with push notifications, location-based marketing and analytics.
Mobile Push Messaging
Visit Website
43
sendwithus
63
Stacks
Email automation for developers + testing and analytics for marketers.
Transactional Email
Visit Website
44
ChatGPT
60
Stacks
Optimizing Language Models for Dialogue
GPT Tools
Visit Website
45
OpenTok
57
Stacks
Build live interactive video, voice and messaging into your web and mobile apps
Communications SDK
Visit Website
46
OpenTok
57
Stacks
Build live interactive video, voice and messaging into your web and mobile apps
Communications SDK
Visit Website
47
Twilio API for WhatsApp
54
Stacks
Reach users on the world’s most popular messaging app through one streamlined API, officially sup...
Communications SDK
Visit Website
48
Postscript
52
Stacks
Mailchimp for SMS
Voice and SMS
Visit Website
49
Amazon Polly
50
Stacks
Text to Speech in 47 Voices and 24 Languages
Text-To-Speech as a Service
Visit Website
50
PHPMailer
47
Stacks
The classic email sending library for PHP
Email API
Visit Website
The Top Communications Tools and Services Ranked By Jobs
Ranked by the number of active job listings a tool is included in
1
LINE
4.64K
Jobs
Get engaged in interactive conversations with LINE users
Communications SDK
Visit Website
Visit Website
2
Twilio
474
Jobs
Bring voice and messaging to your web and mobile applications.
Voice and SMS
Visit Website
Visit Website
3
Bandwidth
317
Jobs
Cloud-ready voice, messaging, and 9-1-1 built for the enterprise
Voice and SMS
Visit Website
Visit Website
4
WhatsApp
286
Jobs
A freeware, cross-platform messaging and Voice over IP service
Phone
Visit Website
Visit Website
5
Braze
207
Jobs
Customer engagement platform
Engagement/Lifecycle Marketing
Visit Website
Visit Website
6
SMTP
197
Jobs
Transactional and Email Relay API
Transactional Email
Visit Website
Visit Website
7
RingCentral
136
Jobs
Cloud business phone systems that work the way you do.
Phone
Visit Website
Visit Website
8
8x8
98
Jobs
Create a better customer experience with SMS, Chat Apps, Video Interaction & Voice
Communications SDK
Visit Website
Visit Website
9
8x8
98
Jobs
Create a better customer experience with SMS, Chat Apps, Video Interaction & Voice
Communications SDK
Visit Website
Visit Website
10
8x8
98
Jobs
Create a better customer experience with SMS, Chat Apps, Video Interaction & Voice
Communications SDK
Visit Website
Visit Website
11
Courier
73
Jobs
Deliver your notifications to the best channel for each user
Web Push Notifications
Visit Website
Visit Website
12
MessageBird
52
Jobs
Making business communications feel as natural as communicating with friends.
Voice and SMS
Visit Website
Visit Website
13
Aircall
42
Jobs
The phone system for modern business
Phone
Visit Website
Visit Website
14
Dialpad
33
Jobs
A pure-cloud business communication platform
Phone
Visit Website
Visit Website
15
Mailing
26
Jobs
Build, test, send emails with React
Open Source Email Templates
Visit Website
Visit Website
16
SendBird
23
Jobs
A Complete Chat Platform, Messaging and Chat SDK and API
Communications SDK
Visit Website
Visit Website
17
Viber
23
Jobs
Free and secure calls and messages
Phone
Visit Website
Visit Website
18
Plivo
19
Jobs
API platform to build Voice & SMS Applications
Voice and SMS
Visit Website
Visit Website
19
Postfix
18
Jobs
A free and open-source mail transfer agent
Email Deliverability
Visit Website
Visit Website
20
SparkPost
14
Jobs
Email Delivery and Analytics for Developers and Enterprises
Transactional Email
Visit Website
Visit Website
21
Knock
14
Jobs
Notification infrastructure for developers
Mobile Push Messaging
Visit Website
Visit Website
22
Knock
14
Jobs
Notification infrastructure for developers
Mobile Push Messaging
Visit Website
Visit Website
23
ChatGPT
13
Jobs
Optimizing Language Models for Dialogue
GPT Tools
Visit Website
Visit Website
24
ExoPlayer
13
Jobs
An extensible media player for Android
Media Player
Visit Website
Visit Website
25
Serenity
12
Jobs
A Rust library for the Discord API
Chatbot Platforms & Tools
Visit Website
Visit Website
26
Postscript
10
Jobs
Mailchimp for SMS
Voice and SMS
Visit Website
Visit Website
27
Alexa
8
Jobs
A cloud-based voice service
Voice AI
Visit Website
Visit Website
28
Outspoken
8
Jobs
SMS, MMS, Transcoding and User Lookup API
Voice and SMS
Visit Website
Visit Website
29
OneSignal
8
Jobs
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
Visit Website
30
OneSignal
8
Jobs
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
Visit Website
31
Servo
7
Jobs
Servo is an open source conversational AI platform,
Chatbot Platforms & Tools
Visit Website
Visit Website
32
Amazon SNS
5
Jobs
Fully managed push messaging service
Mobile Push Messaging
Visit Website
Visit Website
33
Amazon Lex
5
Jobs
Build conversational voice and text interfaces, using the same deep learning technologies as Alexa
Chatbot Platforms & Tools
Visit Website
Visit Website
34
Agora
4
Jobs
The Real-Time Engagement platform for devs to integrate voice & video chat, interactive live stre...
Voice and SMS
Visit Website
Visit Website
35
ManyChat
4
Jobs
A Messenger bot platform for marketing, e-commerce, and support
Chatbot Platforms & Tools
Visit Website
Visit Website
36
Deepgram
4
Jobs
Scalable Speech API for Businesses
Speech Recognition as a Service
Visit Website
Visit Website
37
3CX
4
Jobs
Your PBX, Your Way: On-premise or in the Cloud
Phone
Visit Website
Visit Website
38
Agora
4
Jobs
The Real-Time Engagement platform for devs to integrate voice & video chat, interactive live stre...
Voice and SMS
Visit Website
Visit Website
39
Google Voice
3
Jobs
Smart voice calling on all your devices
Phone
Visit Website
Visit Website
40
Daily.co
3
Jobs
WebRTC video and audio APIs for every developer
Chat API
Visit Website
Visit Website
41
IBM Watson
3
Jobs
A question-answering computer system capable of answering questions posed in natural language
Chatbot Platforms & Tools
Visit Website
Visit Website
42
Dovecot
3
Jobs
An open source IMAP and POP3 email server
Email Deliverability
Visit Website
Visit Website
43
Daily.co
3
Jobs
WebRTC video and audio APIs for every developer
Chat API
Visit Website
Visit Website
44
OpenTok
2
Jobs
Build live interactive video, voice and messaging into your web and mobile apps
Communications SDK
Visit Website
Visit Website
45
OpenTok
2
Jobs
Build live interactive video, voice and messaging into your web and mobile apps
Communications SDK
Visit Website
Visit Website
46
Mandrill
2
Jobs
Send transactional, triggered, and personalized email, then track results.
Transactional Email
Visit Website
Visit Website
47
Amazon Polly
2
Jobs
Text to Speech in 47 Voices and 24 Languages
Text-To-Speech as a Service
Visit Website
Visit Website
48
Cisco Unity Connection
2
Jobs
A feature-rich voice messaging platform
Voice Messaging
Visit Website
Visit Website
49
OpenPhone
1
Jobs
Your business phone, reimagined
Phone
Visit Website
Visit Website
50
Firebase Cloud Messaging
1
Jobs
A cross-platform messaging solution
Mobile Push Messaging
Visit Website
Visit Website