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
10.7K
Stacks
Bring voice and messaging to your web and mobile applications.
Voice and SMS
Visit Website
2
Twilio SendGrid
10.2K
Stacks
Email Delivery. Simplified.
Transactional Email
Visit Website
3
Amazon SES
9.44K
Stacks
Bulk and transactional email-sending service.
Transactional Email
Visit Website
4
Mailgun
7.7K
Stacks
The Email Service for Developers.
Transactional Email
Visit Website
5
Mandrill
4.43K
Stacks
Send transactional, triggered, and personalized email, then track results.
Transactional Email
Visit Website
6
Amazon SNS
1.4K
Stacks
Fully managed push messaging service
Mobile Push Messaging
Visit Website
7
WhatsApp
399
Stacks
A freeware, cross-platform messaging and Voice over IP service
Phone
Visit Website
8
OneSignal
334
Stacks
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
9
OneSignal
334
Stacks
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
10
Postmark
322
Stacks
Email delivery for web apps - done right.
Transactional Email
Visit Website
11
Telegram Bot API
318
Stacks
HTTP-based interface created for developers keen on building bots for Telegram
Chatbot Platforms & Tools
Visit Website
12
Firebase Cloud Messaging
267
Stacks
A cross-platform messaging solution
Mobile Push Messaging
Visit Website
13
Dialogflow
253
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
213
Stacks
Email delivery made easy
Transactional Email
Visit Website
15
Alexa
210
Stacks
A cloud-based voice service
Voice AI
Visit Website
16
Nodemailer
187
Stacks
A module for Node.js applications to allow email sending
Transactional Email
Visit Website
17
Nexmo
180
Stacks
API for SMS, Voice and Phone Verification
Voice and SMS
Visit Website
18
Microsoft Bot Framework
173
Stacks
Connect intelligent bots that interact via text/sms, Skype, Slack, Office 365 mail and other popu...
Chatbot Platforms & Tools
Visit Website
19
ChatGPT
171
Stacks
Optimizing Language Models for Dialogue
GPT Tools
Visit Website
20
IBM Watson
155
Stacks
A question-answering computer system capable of answering questions posed in natural language
Chatbot Platforms & Tools
Visit Website
21
Telegram API
150
Stacks
Build your own customized Telegram clients
Chat API
Visit Website
22
Postscript
143
Stacks
Mailchimp for SMS
Voice and SMS
Visit Website
23
SparkPost
139
Stacks
Email Delivery and Analytics for Developers and Enterprises
Transactional Email
Visit Website
24
Postfix
133
Stacks
A free and open-source mail transfer agent
Email Deliverability
Visit Website
25
SendBird
132
Stacks
A Complete Chat Platform, Messaging and Chat SDK and API
Communications SDK
Visit Website
26
Messenger Platform
130
Stacks
Tools to help you build your bot and reach 900 million people around the world
Chatbot Platforms & Tools
Visit Website
27
LINE
124
Stacks
Get engaged in interactive conversations with LINE users
Communications SDK
Visit Website
28
Mailtrap
120
Stacks
Email Delivery Platform that delivers just in time.
 Great for businesses and individuals.
Transactional Email
Visit Website
29
Braze
114
Stacks
Customer engagement platform
Engagement/Lifecycle Marketing
Visit Website
30
Agora
99
Stacks
The Real-Time Engagement platform for devs to integrate voice & video chat, interactive live stre...
Voice and SMS
Visit Website
31
Agora
99
Stacks
The Real-Time Engagement platform for devs to integrate voice & video chat, interactive live stre...
Voice and SMS
Visit Website
32
Amazon Lex
93
Stacks
Build conversational voice and text interfaces, using the same deep learning technologies as Alexa
Chatbot Platforms & Tools
Visit Website
33
Google Cloud Messaging
89
Stacks
Simple and reliable messaging to reach over a billion devices.
Mobile Push Messaging
Visit Website
34
RingCentral
86
Stacks
Cloud business phone systems that work the way you do.
Phone
Visit Website
35
Botpress
82
Stacks
Open-source conversational AI platform for enterprise automation
Chatbot Platforms & Tools
Visit Website
36
Api.ai
81
Stacks
Conversational interface platform for apps, devices, bots, and services.
Chatbot Platforms & Tools
Visit Website
37
MailKit
78
Stacks
A cross-platform .NET library for IMAP, POP3, and SMTP
Email API
Visit Website
38
Apple Push Notification Ser...
77
Stacks
A platform notification service
Web Push Notifications
Visit Website
39
Aircall
76
Stacks
The phone system for modern business
Phone
Visit Website
40
Botkit
76
Stacks
Building Blocks for Building Bots
Chatbot Platforms & Tools
Visit Website
41
Plivo
74
Stacks
API platform to build Voice & SMS Applications
Voice and SMS
Visit Website
42
Amazon Pinpoint
70
Stacks
Targeted Push Notifications for Mobile Apps
Mobile Push Messaging
Visit Website
43
Chatfuel
69
Stacks
Create chatbots easily — no coding required
Chatbot Platforms & Tools
Visit Website
44
MessageBird
66
Stacks
Making business communications feel as natural as communicating with friends.
Voice and SMS
Visit Website
45
Urban Airship
65
Stacks
Improve customer engagement with push notifications, location-based marketing and analytics.
Mobile Push Messaging
Visit Website
46
sendwithus
63
Stacks
Email automation for developers + testing and analytics for marketers.
Transactional Email
Visit Website
47
OpenTok
57
Stacks
Build live interactive video, voice and messaging into your web and mobile apps
Communications SDK
Visit Website
48
OpenTok
57
Stacks
Build live interactive video, voice and messaging into your web and mobile apps
Communications SDK
Visit Website
49
Twilio API for WhatsApp
55
Stacks
Reach users on the world’s most popular messaging app through one streamlined API, officially sup...
Communications SDK
Visit Website
50
Amazon Polly
52
Stacks
Text to Speech in 47 Voices and 24 Languages
Text-To-Speech as a Service
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
3.55K
Jobs
Get engaged in interactive conversations with LINE users
Communications SDK
Visit Website
Visit Website
2
WhatsApp
292
Jobs
A freeware, cross-platform messaging and Voice over IP service
Phone
Visit Website
Visit Website
3
Twilio
277
Jobs
Bring voice and messaging to your web and mobile applications.
Voice and SMS
Visit Website
Visit Website
4
Cohesive
255
Jobs
Create magical content with a powerful AI editor
GPT Tools
Visit Website
Visit Website
5
Bandwidth
140
Jobs
Cloud-ready voice, messaging, and 9-1-1 built for the enterprise
Voice and SMS
Visit Website
Visit Website
6
Braze
140
Jobs
Customer engagement platform
Engagement/Lifecycle Marketing
Visit Website
Visit Website
7
LLM
119
Jobs
A Rust Crate/CLI for CPU inference of LLMs
Large Language Model Tools
Visit Website
Visit Website
8
SMTP
100
Jobs
Transactional and Email Relay API
Transactional Email
Visit Website
Visit Website
9
ChatGPT
78
Jobs
Optimizing Language Models for Dialogue
GPT Tools
Visit Website
Visit Website
10
Mailing
51
Jobs
Build, test, send emails with React
Open Source Email Templates
Visit Website
Visit Website
11
LangChain
47
Jobs
Build AI apps with LLMs through composability
Large Language Model Tools
Visit Website
Visit Website
12
Courier
45
Jobs
Deliver your notifications to the best channel for each user
Web Push Notifications
Visit Website
Visit Website
13
RingCentral
34
Jobs
Cloud business phone systems that work the way you do.
Phone
Visit Website
Visit Website
14
SendBird
29
Jobs
A Complete Chat Platform, Messaging and Chat SDK and API
Communications SDK
Visit Website
Visit Website
15
Dialpad
26
Jobs
A pure-cloud business communication platform
Phone
Visit Website
Visit Website
16
Aircall
26
Jobs
The phone system for modern business
Phone
Visit Website
Visit Website
17
MessageBird
25
Jobs
Making business communications feel as natural as communicating with friends.
Voice and SMS
Visit Website
Visit Website
18
8x8
22
Jobs
Create a better customer experience with SMS, Chat Apps, Video Interaction & Voice
Communications SDK
Visit Website
Visit Website
19
8x8
22
Jobs
Create a better customer experience with SMS, Chat Apps, Video Interaction & Voice
Communications SDK
Visit Website
Visit Website
20
8x8
22
Jobs
Create a better customer experience with SMS, Chat Apps, Video Interaction & Voice
Communications SDK
Visit Website
Visit Website
21
aider
21
Jobs
GPT powered coding in your terminal
AI Programming Assistant
Visit Website
Visit Website
22
Plivo
20
Jobs
API platform to build Voice & SMS Applications
Voice and SMS
Visit Website
Visit Website
23
Outspoken
15
Jobs
SMS, MMS, Transcoding and User Lookup API
Voice and SMS
Visit Website
Visit Website
24
Viber
15
Jobs
Free and secure calls and messages
Phone
Visit Website
Visit Website
25
DALL-E
13
Jobs
Create realistic images and art from a description in natural language
Large Language Models
Visit Website
Visit Website
26
Serenity
12
Jobs
A Rust library for the Discord API
Chatbot Platforms & Tools
Visit Website
Visit Website
27
Hugging Face
12
Jobs
Build, train and deploy state of the art models
Large Language Model Tools
Visit Website
Visit Website
28
Postscript
10
Jobs
Mailchimp for SMS
Voice and SMS
Visit Website
Visit Website
29
Generative Models
9
Jobs
Open-source Generative Models by Stability AI
Large Language Models
Visit Website
Visit Website
30
LLaMA
9
Jobs
A foundational, 65-billion-parameter large language model (By Facebook)
Large Language Models
Visit Website
Visit Website
31
OneSignal
9
Jobs
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
Visit Website
32
OneSignal
9
Jobs
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
Visit Website
33
LlamaIndex
8
Jobs
A central interface to connect your LLMs with external data
Large Language Model Tools
Visit Website
Visit Website
34
Knock
7
Jobs
Notification infrastructure for developers
Mobile Push Messaging
Visit Website
Visit Website
35
Baseplate
7
Jobs
Backend-as-a-service for LLM apps
Large Language Model Tools
Visit Website
Visit Website
36
Knock
7
Jobs
Notification infrastructure for developers
Mobile Push Messaging
Visit Website
Visit Website
37
ExoPlayer
5
Jobs
An extensible media player for Android
Media Player
Visit Website
Visit Website
38
Amazon Lex
6
Jobs
Build conversational voice and text interfaces, using the same deep learning technologies as Alexa
Chatbot Platforms & Tools
Visit Website
Visit Website
39
MosaicML Pretrained Transfo...
6
Jobs
A new standard for open-source, commercially usable LLMs
Large Language Models
Visit Website
Visit Website
40
BLOOM
5
Jobs
A 176B-parameter open-access multilingual language model
Large Language Models
Visit Website
Visit Website
41
3CX
5
Jobs
Your PBX, Your Way: On-premise or in the Cloud
Phone
Visit Website
Visit Website
42
Servo
5
Jobs
Servo is an open source conversational AI platform,
Chatbot Platforms & Tools
Visit Website
Visit Website
43
Alexa
4
Jobs
A cloud-based voice service
Voice AI
Visit Website
Visit Website
44
Whisper
5
Jobs
Open source speech recognition by OpenAI
Large Language Models
Visit Website
Visit Website
45
Agora
3
Jobs
The Real-Time Engagement platform for devs to integrate voice & video chat, interactive live stre...
Voice and SMS
Visit Website
Visit Website
46
Agora
3
Jobs
The Real-Time Engagement platform for devs to integrate voice & video chat, interactive live stre...
Voice and SMS
Visit Website
Visit Website
47
Postfix
3
Jobs
A free and open-source mail transfer agent
Email Deliverability
Visit Website
Visit Website
48
ManyChat
3
Jobs
A Messenger bot platform for marketing, e-commerce, and support
Chatbot Platforms & Tools
Visit Website
Visit Website
49
Claude
3
Jobs
A next-generation AI assistant for your tasks, no matter the scale
Large Language Models
Visit Website
Visit Website
50
Stable Diffusion
3
Jobs
A latent text-to-image diffusion model
Large Language Models
Visit Website
Visit Website