
Hello there.
People here usually share their stories and I want to share mine too. I hope it will help someone or at least entertain you.
Long-story-short, I have an in-house technology my company used for years for building chatbots in HR Tech. These bots help with automating employee support, recruiting, learning and etc.
It's doing OK but has too many enterprise sale cycles with not-much-enterprise checks. It's also a vitamin, not a painkiller which makes it even more annoying.
Anyway, in 2020 I decided that I need something less "enterprisy" and more global - I decided to publish one of the core tools we use inside: our chatbot engine. I decided to focus it on the only audience (except HR peeps of course) I understand - developers.
My thinking was that developers do not need UI - API-first SaaS product might be more interesting and stay out in the crowd. It's not empty space though - there are a few similar platforms, so it's a kinda validated market.
My company is a part of the Microsoft Startup program and proficient Azure user. All our in-house apps run on Azure, which makes a choice of tools quite limited.
There is a new type of no-code tool called API Management. AWS has one, Azure has one, there are also some independent solutions.
What is API Management in easy words? It's a way to wrap your APIs with billing and provide it to the world in a secure manner. You can read a bit more about that on MS blog: How to monetize APIs with Azure API Management (AAM) with Stripe

That was the "main dish". I also needed these additions to it:
For landing, I chose Landen (now Umso). I was impressed with how fast I can create a landing page and not impressed with it after a while. I would probably move away soon to another no-code website builder, more suitable for bigger custom websites.
GitHub login required me to add some kind of a single sign-on solution. There is Azure AD B2C for that, which is an Azure solution for user management and SSO. It's nice and free for under 50 000 users and also provides user management capabilities.
For payment providers, there are amazing products available to not only gather money but to manage subscriptions as well. All-in-one.
I needed quite a basic setup: I need to wrap my existing APIs with API Management, authenticate it with GitHub, and bill through the payment provider.
Problems began from the start. AAM use Paperbits under the hood to build a custom developer portal. It's a nice tool for drag-and-drop website building, only somehow it's not fully integrated into AAM. A lot of features missing including basic stuff, like adding HTML or js - so I can't add analytics to the developer portal. It's also doesn't work very well. When I started it dropped session every hour and I lost half of the website content several times. I think they fixed it right now.
Paperbits editor

The next problem lies in GitHub auth. You might think that auth for developers product, build with developers product from the same owner as a GitHub will have this auth by default? You are 50% wrong. The current implementation of the auth will give you neither email nor the name of the user signed in. You need to write code to manually peek these through GitHub API.
And finally, the payments. AAM has subscription management in it, but it lacks any type of payment. So to get money for your API you need to delegate all subscription management and user management to your own coded service. I wonder now if there a way to smash several no-code tools together to achieve the same thing, but I preferred to code it instead.
I wrote about it here if you want technical details.
Here is a bunch of points I learned so far.
Sometime after launching the landing page and starting coding I started to promote the thing. Promoting to developers is an entirely separate complex thing. There is actually quite a good article from @PovilasKorop on this site which helped me a lot with that.
I started to do the following
I have only one last concern here: am I betting on a dead horse. Chatbot hype is long gone, it looks like the idea is slowly climbing up from the Trough of Disillusionment right now, but who knows.

The time will show. For now, I'm just happy to share the way we built bots for thousands of people with anyone who wants to do it yourself.