
Ghost
Medium
Buttondown
beehiiv
MailChimp
WordPress
Notocat
With Substack, anyone can start a publication that combines a personal website, blog, and email newsletter or podcast. It's quick and simple.

Retell AI
Bland AI
Smith.ai
Bolna
Deepgram
Voiceflow
Goodcall
Voice AI Infrastructure for the Internet

Which is more popular?
Based on our record, Substack seems to be a lot more popular than Vapi. While we know about 111 links to Substack, we've tracked only 9 mentions of Vapi.
Website, pricing, platforms and company facts side by side.
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| Website | substack.com | vapi.ai |
| Company | Startup from the United States | — |
| Listed in |
What each product offers, as listed by its team.


Possible disadvantages
No features have been listed yet.
An editorial look at what each product does well and who it suits.


Overall verdict
Why this product is good
Recommended for
No analysis of Vapi yet.
Walkthroughs and reviews on video.
Monetizing Podcasts and Newsletters - Chris Best of Substack and Jonathan Gill of Backtracks
More videos
Exploring Vapi A Quick Review - Discuss what is needed to compare to Air.Ai
More videos
How often each product is chosen within a category, 0–100% relative to the other.


Share your experience with using Substack and Vapi. For example, how are they different and which one is better?
External articles and on-site reviews we used to compare the two products.


Substack offers writers of all experience levels the ability to write an email newsletter that’s profitable through subscriptions. Substack provides purpose-built web and newsletter publishing tools to enable writers...
What sеts Substack apart is its sеamlеss intеgration of contеnt crеation and subscription-basеd monеtization. Substack’s usеr-friеndly intеrfacе, distribution tools, and support for various contеnt formats make it a...
Substack and Medium differ primarily in their monetization methods. Medium pays creators based on reader engagement, while Substack enables writers to monetize directly through paid subscriptions to their newsletters....
Developers shouldn’t have to guess what happens to their conversations once they hit the platform. With Vapi and Retell, “ownership” often comes with strings attached. SigmaMind AI takes the opposite stance: your data...
Iâd recommend Vapi if you are planning to create advanced AI meeting agents. It is great for creating custom flows and integrates easily with all of your databases, CRMs, and knowledge bases.
Vapi is a San Francisco-based AI Voice Agent Development Agency founded 2023. This company is well-known for its developer-first platform that supports businesses to deploy their own AI voice agents. Vapi is one of...
Recommendations tracked on public social media and blogs since March 2021.


Books have already been written on this, some as early as 1945 (That Hideous Strength, C.S. Lewis). Otherwise I can recommend basically everything by Curtis Yarvin and Kevin Dolan (https://substack.com/@exitgroup,... - Source: Hacker News / 11 days ago
We built something quite similar 6 months ago called PEAK (Proof of Effort And Knowledge). Blog post and YT video here: https://substack.com/@jeffksmithjr/p-195763168 Our version has its own TUI and was intended for semi-adversarial... - Source: Hacker News / 13 days ago
Https://substack.com/@rubenafo/note/c-332218129?r=26y5kn&utm_source=notes-share-action&utm_medium=web. - Source: Hacker News / 23 days ago
The Vapi platform helps developers build and deploy voice agents and AI products in Python, React, and TypeScript. It provides two ways to make intelligent voice apps. It's assistant's option allows you to create simple conversational... - Source: dev.to / 8 months ago
It can make/take phone calls[0], but they need to be prompted on the nature of the call, the data they need, and how to collect it. They can also output the results of the call via API. An AI agent from Masterworks recently called me... - Source: Hacker News / 9 months ago
### Resources **VAPI Documentation:** [vapi.ai/docs](https://vapi.ai/docs) – Voice agent API, webhook integration, real-time call transcription, intent detection endpoints, assistant configuration, function calling. **Twilio Voice... - Source: dev.to / 10 months ago
When comparing Substack and Vapi, you can also consider the following products.

Ghost is a fully open source, adaptable platform for building and running a modern online publication. We power blogs, magazines and journalists from Zappos to Sky News.
Compare Ghost to Substack or Vapi:

API that enables developers to build human-like voice agents
Compare Retell AI to Substack or Vapi:

Welcome to Medium, a place to read, write, and interact with the stories that matter most to you.
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Buttondown is the best way to start and run your newsletter
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Smith.a is one of the best virtual receptionist and chat services that offer phone calls, answer chats and take messages for you and your staff.
Compare Smith.ai to Substack or Vapi: