I want to be clear: ChatGPT is an extraordinary tool. For research, for reasoning through complex problems, for coding assistance, for synthesizing long documents, it is hard to beat.
For email drafting specifically? I paid $20/month for two years before I did the math.
How I was actually using ChatGPT Plus
Looking back at my usage over the last six months, roughly 70% of my ChatGPT sessions were email-related. I would paste a thread, write a brief, generate a draft, copy it back to Gmail, and send.
I had a system prompt I had iterated on over months. It was pretty good. My emails were better than they would have been without it.
But I was also spending about 2-3 minutes per substantive email on the mechanics of the workflow: tab-switching, pasting, prompting, copying. For someone sending 20-30 emails a day that need real thought, that is meaningful time.
More importantly: after two years of this, the AI still did not know how I write. Each session started cold. Every time I needed to draft an email to my most important client (a person I have emailed hundreds of times, with a specific relationship tone and shared context), I was starting from scratch.
The math
$20/month for ChatGPT Plus.
Of that, I was using maybe 70% for email. Call it $14/month of value derived from email drafting.
Alternatively: a purpose-built email AI that costs $15/month, runs inside Gmail and Outlook without tab-switching, and has actually read my sent email history.
The comparison was not complicated.
What changed after switching
Three things I noticed immediately:
The voice gap closed. The drafts from FinalDraft are conditioned on my actual sent email history. When I draft a reply to a client I have emailed 50 times, the output reads more like me than anything ChatGPT produced from my system prompt. Not perfect on the first draft every time, but recognizably mine.
The workflow friction went to near-zero. I do not have a "ChatGPT tab" anymore. I open the email, I click the button, I see a draft, I send or edit. The 2-3 minutes per email compresses to 15-20 seconds for 70-80% of my email volume.
My ChatGPT usage became more focused. Removing email from my ChatGPT workflow did something unexpected: my remaining ChatGPT sessions became more intentional. I use it now for the things it is genuinely best at. The email tab-switching habit was actually cluttering the tool with a use case that had a better solution.
What I kept ChatGPT for
I did not cancel ChatGPT Plus for everything. I kept it for:
- Long-form reasoning and analysis tasks
- Research synthesis
- Complex emails that need multiple rounds of iteration and manual direction
- Everything outside email
The free tier of ChatGPT is now sufficient for my email-related use cases, which is roughly none of them.
The one thing I would do differently
I wish I had set up the in-inbox workflow before I built such an elaborate ChatGPT system prompt. Two years of prompt iteration produced something I was proud of, and then I realized the system prompt approach has a fundamental ceiling that voice-matched RAG does not.
If you are just starting your AI-for-email journey, skip the prompt engineering rabbit hole and start with an in-inbox tool that learns from your sent history. The prompt engineering work is fun but the returns diminish faster than you expect.
If you want to test what voice-matched email drafting looks like before committing to a full setup, the FinalDraft Persona Prompt Generator builds a first-person prompt from your answers in about 5 minutes. It is a manual approximation of what the full pipeline derives automatically, and it is free.