New project: Warm Reply

I've been sending cold emails to generate leads for various products, but ran into issues. My first campaign got my main Substats email flagged and for two days everything I sent went to spam. Searching for contacts in Clay and similar products yielded poor results and had a subpar UX. I wanted something I could put on autopilot that prioritized quality over quantity and sent messages that weren't slop.

I built Warm Reply because it's the outbound email product that I wanted. It has:

• Intelligent contact search, where the system takes my ICP description and constructs the best query to return a given number of contacts with a match score.
• Personalized email generation for each person, written in my voice, reflecting my product, and the recipient's company.
• Smart send times with controls around volume.
• Automations for each one of these steps so cold emails go out regularly and warm leads land in my inbox.

There's more on the backstory on the about page, but that's more or less what I wanted a product to do and that's what Warm Reply does.

When thinking about how to price it – in case others find it as useful as I do – I wanted there to be minimal friction to get started. I also like outcome-based pricing especially for AI products (shout out to Ramanujam for that one).

So the product is mainly priced around warm replies. It's free to add your own contacts, generate personalized emails, and send – you're only charged when you get a warm reply.

This kind of pricing model wasn't really feasible before. Our system receives replies (via Resend's Inbound feature), and gpt-5-mini classifies it as a warm reply or not. Then the reply is delivered to the original sender, who can take it from there.

Data storage and email sending is extremely cheap, so it's fine for those aspects of the product to be free.

The non-cheap part is contact retrieval. Data providers such as People Data Labs (which Warm Reply uses and which also powers Clay) charge upwards of $0.30 per contact. Warm Reply offers 10 free contacts to new users and then each marginal contact is effectively sold at cost. (Hopefully as Warm Reply usage grows, we can benefit from volume discounts and pass those cost savings onto our customers.)

This was fun to build not just because I'm actually using it every weekday to power cold outreach but also because I got to build an information-dense UI that suits my personal tastes. It's probably not for everyone, but it's what I like. Will be writing more about these hypersonal UIs soon.

Check it out and let me know what you think!