๐ From AI/ML Engineer to Solo SaaS Founder: Building TailorMails.dev
Hi, Iโm Randhir Kumar โ an AI/ML engineer turned solo founder.
This is the story of how I built my first SaaS product, TailorMails.dev, from scratch, why I decided to build it in public, and whatโs coming next as we prepare to launch on Product Hunt.
โ The Problem: Cold Emails That Donโt Work
Cold emailing has always been a pain point for me. Whether itโs job hunting, reaching out to potential collaborators, or trying to generate leads, the success rate is painfully low.
Why most cold emails fail?
- They sound robotic
- Personalization is missing
- Following up consistently is hard
As an engineer, I thought: โWhy not use AI to solve this?โ
๐ก The Idea: TailorMails.dev
I wanted to create a tool that makes cold emails less cold.
TailorMails helps you:
- Turn a LinkedIn bio into a personalized, reply-worthy email
- Generate multiple subject line variations for A/B testing
- Automate follow-ups while keeping a human tone
- Use a lightweight CRM to track prospects from new โ converted
๐ That became TailorMails.dev.
๐ ๏ธ The Build Journey (In Public)
I decided to build this product in public on X (Twitter).
I share openly about:
- The tech stack I used (React, Firebase, OpenAI API)
- The mistakes I made
- The small wins, like the first sign-up
This way, I could stay accountable, get feedback early, and connect with other builders.
โก Challenges as a Solo Founder
Building your first SaaS product solo isnโt easy.
Some challenges I faced:
- Balancing engineering with design + marketing
- Avoiding feature creep and staying focused
- Overcoming self-doubt (โWill anyone actually use this?โ)
But every challenge taught me something valuable.
๐ Why Product Hunt?
Launching on Product Hunt feels like the next big step.
Itโs not just about getting upvotes โ itโs about putting TailorMails in front of early adopters, founders, and sales pros who care about productivity and personalization.
I want to learn from their feedback and make the product better.
๐ฎ Whatโs Next?
Upcoming features for TailorMails:
- Advanced analytics to predict the best email sending times
- Integrations with Gmail, Outlook, and HubSpot
- Scaling infrastructure as users grow
And of course, continuing to share the journey in public.
๐ฏ Final Thoughts
This is my first SaaS product, built by a solo founder who just wanted to solve his own problem.
If youโve ever sent cold emails that didnโt get replies, Iโd love for you to try ๐ TailorMails.dev.
And if youโre building your own project, donโt be afraid to share the process openly.
Building in public might just be your best marketing tool.
โ๏ธ About Me
Iโm Randhir Kumar โ AI/ML Engineer โข Solo Founder of TailorMails.dev
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