SellByChat vs DIY ChatGPT Bot
A DIY ChatGPT bot is one you build yourself with a prompt and the API. You own it and can change anything. SellByChat is a finished system with Instagram built in, follow-up, and a team running it. Build your own if you enjoy the engineering. Pick SellByChat if you want it working now.
Side by side
| What you are comparing | SellByChat | DIY ChatGPT Bot |
|---|---|---|
| Who it is for | Coaches who want a working setter without building one | Builders who want to own the whole thing |
| Custom AI training on your offer | Professional prompt engineering with iterative testing and refinement | A prompt you write and adjust yourself |
| Objection handling | Battle-tested objection reframes refined across thousands of conversations | Whatever you put in the system prompt, tested by you |
| Multi-day follow-up | Built-in follow-up engine that re-engages over days and weeks | No follow-up system. You'd need to build that separately |
| Coaching-specific design | Trained on coaching sales psychology and high-ticket closing patterns | Generic ChatGPT with no coaching sales expertise |
| Done-for-you setup | Full infrastructure including API, conversation management, and analytics | You build and maintain everything. API costs, hosting, bugs are all on you |
| Instagram integration | Native Instagram DM integration via official Meta API | No Instagram integration. Requires custom development to connect |
| Price | Core $397/month. AI + Full Management $597/month. | Model costs plus your build time. |
Pricing in this table is what we could see published on 2026-09-21. Where a cell says not listed, we could not verify a public price and did not guess one.
Where DIY ChatGPT Bot is better
You own it outright and can change anything you want, any day
Model costs alone are low compared with any managed service
You learn exactly how it works, which makes you better at running it
No vendor to wait on when you want a change
Pick SellByChat if
- You want it live in 7 days instead of building it for months
- You want Instagram, follow-up, and reporting already handled
- You would rather spend your time coaching than debugging
Pick DIY ChatGPT Bot if
- You or someone on your team genuinely enjoy building this
- You want full ownership with no monthly fee to a vendor
- Your use case is unusual and you want to shape every part of it
The verdict
If you like building, build it. You own it, the model costs are small, and you will understand it better than any vendor could explain. The real cost is your time on the Instagram connection, conversation state, follow-up, and upkeep. SellByChat is for coaches who want that already done and live in 7 days.
Questions
Can I just use ChatGPT for my DM sales?
ChatGPT is a general-purpose AI. It has no Instagram integration, no follow-up system, no conversation management, and no coaching sales training. You would need to build all of that yourself.
How much does it cost to build your own ChatGPT DM bot?
API costs are just the start. Factor in developer time for Instagram integration, conversation state management, follow-up logic, error handling, and ongoing maintenance. Most coaches spend more building a DIY solution than SellByChat costs.
Is a DIY bot as good as SellByChat?
Unlikely. SellByChat's prompts are refined across thousands of real coaching conversations. A DIY bot starts from zero with no real-world data. Plus you'd need to build the entire infrastructure around it.
Not sure which one fits?
Book a strategy call. We look at your inbox and say straight out whether SellByChat is the right pick for you, or whether DIY ChatGPT Bot is.