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
11K
Stacks
Bring voice and messaging to your web and mobile applications.
Voice and SMS
Visit Website
2
Twilio SendGrid
10.5K
Stacks
Email Delivery. Simplified.
Transactional Email
Visit Website
3
Amazon SES
9.68K
Stacks
Bulk and transactional email-sending service.
Transactional Email
Visit Website
4
Mailgun
7.86K
Stacks
The Email Service for Developers.
Transactional Email
Visit Website
5
Mandrill
4.41K
Stacks
Send transactional, triggered, and personalized email, then track results.
Transactional Email
Visit Website
6
Amazon SNS
1.37K
Stacks
Fully managed push messaging service
Mobile Push Messaging
Visit Website
7
LangChain
462
Stacks
Build AI apps with LLMs through composability
Large Language Model Tools
Visit Website
8
WhatsApp
407
Stacks
A freeware, cross-platform messaging and Voice over IP service
Phone
Visit Website
9
OneSignal
348
Stacks
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
10
OneSignal
348
Stacks
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
11
OpenAI
329
Stacks
Creating safe AGI that benefits all
Large Language Models
Visit Website
12
Postmark
326
Stacks
Email delivery for web apps - done right.
Transactional Email
Visit Website
13
Telegram Bot API
322
Stacks
HTTP-based interface created for developers keen on building bots for Telegram
Chatbot Platforms & Tools
Visit Website
14
ChatGPT
269
Stacks
Optimizing Language Models for Dialogue
GPT Tools
Visit Website
15
Firebase Cloud Messaging
269
Stacks
A cross-platform messaging solution
Mobile Push Messaging
Visit Website
16
Dialogflow
259
Stacks
Give users new ways to interact with your product by building engaging voice and text-based conve...
Chatbot Platforms & Tools
Visit Website
17
Nodemailer
251
Stacks
A module for Node.js applications to allow email sending
Transactional Email
Visit Website
18
Alexa
222
Stacks
A cloud-based voice service
Voice AI
Visit Website
19
Vercel AI SDK
215
Stacks
An interoperable, streaming-enabled, edge-ready software development kit for AI apps
Large Language Model Tools
Visit Website
20
Mailjet
213
Stacks
Email delivery made easy
Transactional Email
Visit Website
21
Nexmo
183
Stacks
API for SMS, Voice and Phone Verification
Voice and SMS
Visit Website
22
Microsoft Bot Framework
175
Stacks
Connect intelligent bots that interact via text/sms, Skype, Slack, Office 365 mail and other popu...
Chatbot Platforms & Tools
Visit Website
23
IBM Watson
157
Stacks
A question-answering computer system capable of answering questions posed in natural language
Chatbot Platforms & Tools
Visit Website
24
Telegram API
152
Stacks
Build your own customized Telegram clients
Chat API
Visit Website
25
SparkPost
139
Stacks
Email Delivery and Analytics for Developers and Enterprises
Transactional Email
Visit Website
26
SendBird
138
Stacks
A Complete Chat Platform, Messaging and Chat SDK and API
Communications SDK
Visit Website
27
Postfix
135
Stacks
A free and open-source mail transfer agent
Email Deliverability
Visit Website
28
LINE
134
Stacks
Get engaged in interactive conversations with LINE users
Communications SDK
Visit Website
29
Messenger Platform
129
Stacks
Tools to help you build your bot and reach 900 million people around the world
Chatbot Platforms & Tools
Visit Website
30
Postscript
123
Stacks
Mailchimp for SMS
Voice and SMS
Visit Website
31
Mailtrap
122
Stacks
Email Delivery Platform that delivers just in time.
 Great for businesses and individuals.
Transactional Email
Visit Website
32
Braze
116
Stacks
Customer engagement platform
Engagement/Lifecycle Marketing
Visit Website
33
Agora
101
Stacks
The Real-Time Engagement platform for devs to integrate voice & video chat, interactive live stre...
Voice and SMS
Visit Website
34
Agora
101
Stacks
The Real-Time Engagement platform for devs to integrate voice & video chat, interactive live stre...
Voice and SMS
Visit Website
35
Amazon Lex
96
Stacks
Build conversational voice and text interfaces, using the same deep learning technologies as Alexa
Chatbot Platforms & Tools
Visit Website
36
Google Cloud Messaging
91
Stacks
Simple and reliable messaging to reach over a billion devices.
Mobile Push Messaging
Visit Website
37
Botpress
88
Stacks
Open-source conversational AI platform for enterprise automation
Chatbot Platforms & Tools
Visit Website
38
RingCentral
85
Stacks
Cloud business phone systems that work the way you do.
Phone
Visit Website
39
Api.ai
83
Stacks
Conversational interface platform for apps, devices, bots, and services.
Chatbot Platforms & Tools
Visit Website
40
Plivo
80
Stacks
API platform to build Voice & SMS Applications
Voice and SMS
Visit Website
41
Apple Push Notification Ser...
79
Stacks
A platform notification service
Web Push Notifications
Visit Website
42
Aircall
77
Stacks
The phone system for modern business
Phone
Visit Website
43
Botkit
76
Stacks
Building Blocks for Building Bots
Chatbot Platforms & Tools
Visit Website
44
Chatfuel
72
Stacks
Create chatbots easily — no coding required
Chatbot Platforms & Tools
Visit Website
45
Amazon Pinpoint
71
Stacks
Targeted Push Notifications for Mobile Apps
Mobile Push Messaging
Visit Website
46
MessageBird
71
Stacks
Making business communications feel as natural as communicating with friends.
Voice and SMS
Visit Website
47
sendwithus
64
Stacks
Email automation for developers + testing and analytics for marketers.
Transactional Email
Visit Website
48
Urban Airship
64
Stacks
Improve customer engagement with push notifications, location-based marketing and analytics.
Mobile Push Messaging
Visit Website
49
OpenTok
57
Stacks
Build live interactive video, voice and messaging into your web and mobile apps
Communications SDK
Visit Website
50
OpenTok
57
Stacks
Build live interactive video, voice and messaging into your web and mobile apps
Communications SDK
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
guidance
1.81K
Jobs
A guidance language for controlling large language models
Large Language Model Tools
Visit Website
Visit Website
2
LINE
1.69K
Jobs
Get engaged in interactive conversations with LINE users
Communications SDK
Visit Website
Visit Website
3
WhatsApp
194
Jobs
A freeware, cross-platform messaging and Voice over IP service
Phone
Visit Website
Visit Website
4
Cohesive
174
Jobs
Create magical content with a powerful AI editor
GPT Tools
Visit Website
Visit Website
5
Agents
183
Jobs
An open-source framework for autonomous language agents
GPT Tools
Visit Website
Visit Website
6
LLM
169
Jobs
A Rust Crate/CLI for CPU inference of LLMs
Large Language Model Tools
Visit Website
Visit Website
7
Unstructured
147
Jobs
ETL for LLMs
Large Language Model Tools
Visit Website
Visit Website
8
Twilio
106
Jobs
Bring voice and messaging to your web and mobile applications.
Voice and SMS
Visit Website
Visit Website
9
OpenAI
82
Jobs
Creating safe AGI that benefits all
Large Language Models
Visit Website
Visit Website
10
LangChain
59
Jobs
Build AI apps with LLMs through composability
Large Language Model Tools
Visit Website
Visit Website
11
SMTP
57
Jobs
Transactional and Email Relay API
Transactional Email
Visit Website
Visit Website
12
aider
56
Jobs
GPT powered coding in your terminal
AI Programming Assistant
Visit Website
Visit Website
13
Bandwidth
43
Jobs
Cloud-ready voice, messaging, and 9-1-1 built for the enterprise
Voice and SMS
Visit Website
Visit Website
14
Courier
48
Jobs
Deliver your notifications to the best channel for each user
Web Push Notifications
Visit Website
Visit Website
15
ChatGPT
47
Jobs
Optimizing Language Models for Dialogue
GPT Tools
Visit Website
Visit Website
16
Viber
45
Jobs
Free and secure calls and messages
Phone
Visit Website
Visit Website
17
Braze
42
Jobs
Customer engagement platform
Engagement/Lifecycle Marketing
Visit Website
Visit Website
18
BLOOM
20
Jobs
A 176B-parameter open-access multilingual language model
Large Language Models
Visit Website
Visit Website
19
Generative Models
24
Jobs
Open-source Generative Models by Stability AI
Large Language Models
Visit Website
Visit Website
20
Outlines
21
Jobs
Generate text with LLMs
Large Language Model Tools
Visit Website
Visit Website
21
Mailing
19
Jobs
Build, test, send emails with React
Open Source Email Templates
Visit Website
Visit Website
22
Dialpad
19
Jobs
A pure-cloud business communication platform
Phone
Visit Website
Visit Website
23
Hugging Face
15
Jobs
Build, train and deploy state of the art models
Large Language Model Tools
Visit Website
Visit Website
24
Aircall
19
Jobs
The phone system for modern business
Phone
Visit Website
Visit Website
25
Knock
10
Jobs
Notification infrastructure for developers
Mobile Push Messaging
Visit Website
Visit Website
26
Knock
10
Jobs
Notification infrastructure for developers
Mobile Push Messaging
Visit Website
Visit Website
27
Nexmo
14
Jobs
API for SMS, Voice and Phone Verification
Voice and SMS
Visit Website
Visit Website
28
Ollama
15
Jobs
Get up and running with large language models locally
Large Language Model Tools
Visit Website
Visit Website
29
LLaMA
10
Jobs
A foundational, 65-billion-parameter large language model (By Facebook)
Large Language Models
Visit Website
Visit Website
30
RingCentral
7
Jobs
Cloud business phone systems that work the way you do.
Phone
Visit Website
Visit Website
31
Claude
6
Jobs
A next-generation AI assistant for your tasks, no matter the scale
Large Language Models
Visit Website
Visit Website
32
Semantic Kernel
10
Jobs
Integrate cutting-edge LLM technology quickly and easily into your apps (By Microsoft)
Large Language Model Tools
Visit Website
Visit Website
33
LlamaIndex
9
Jobs
A central interface to connect your LLMs with external data
Large Language Model Tools
Visit Website
Visit Website
34
Outspoken
9
Jobs
SMS, MMS, Transcoding and User Lookup API
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
Alexa
6
Jobs
A cloud-based voice service
Voice AI
Visit Website
Visit Website
37
Postscript
8
Jobs
Mailchimp for SMS
Voice and SMS
Visit Website
Visit Website
38
ExoPlayer
2
Jobs
An extensible media player for Android
Media Player
Visit Website
Visit Website
39
GPT-4 by OpenAI
7
Jobs
A large multimodal model that can solve difficult problems with greater accuracy
Large Language Models
Visit Website
Visit Website
40
Postfix
4
Jobs
A free and open-source mail transfer agent
Email Deliverability
Visit Website
Visit Website
41
OneSignal
6
Jobs
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
Visit Website
42
OneSignal
6
Jobs
A high volume push notification service for websites and mobile applications
Mobile Push Messaging
Visit Website
Visit Website
43
Plivo
6
Jobs
API platform to build Voice & SMS Applications
Voice and SMS
Visit Website
Visit Website
44
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
45
SendBird
5
Jobs
A Complete Chat Platform, Messaging and Chat SDK and API
Communications SDK
Visit Website
Visit Website
46
Postmark
4
Jobs
Email delivery for web apps - done right.
Transactional Email
Visit Website
Visit Website
47
Gorilla
4
Jobs
An API store for LLMs
Large Language Model Tools
Visit Website
Visit Website
48
Workers AI
4
Jobs
Serverless GPU-powered inference
Large Language Model Tools
Visit Website
Visit Website
49
AutoGen
4
Jobs
Enable next-gen large language model applications (By Microsoft)
Large Language Model Tools
Visit Website
Visit Website
50
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