For Coldproof: three companies that look like your buyers.

Your buyer, as we read your site: Coldproof sells to founders and first sales hires of small US and UK B2B software companies who have to generate sales meetings but can't book them themselves..

PromptlessHiring a Founding Engineer (All Levels) in San Francisco, CA, US, posted about 12 months ago, on YC's job board
KenobiOn Hacker News: "Launch HN: Kenobi (YC W22) – Personalize your website for every visitor" (46 points, 2025-12-17)
ErgoHiring a Sales Development Representative in San Francisco, CA, US, posted about 3 months ago, on YC's job board

The three, with their receipts

Each sentence below was written from the sources listed under it and from nothing else.

1. Promptless promptless.ai

Promptless is a 5-person YC Winter 2025 company that sells an AI teammate for customer-facing docs, and it's hiring a Founding Engineer, so the team is still small and building. Its Show HN launch, which got 35 points, suggests the founders are finding early users themselves, and that is the position Coldproof's buyers are in when they have to generate sales meetings but can't book them on their own.

Hiring a Founding Engineer (All Levels) in San Francisco, CA, US, posted about 12 months ago, on YC's job boardwww.ycombinator.com/companies/promptless/jobs/FdJSR55-founding-engineer-all-levels, 2025-11-07
On Hacker News: "Show HN: Tag Promptless on any GitHub PR/Issue to get updated user-facing docs" (35 points, 2026-02-24)news.ycombinator.com/item?id=47140332, 2026-02-24
On Hacker News: "My practical guide for optimizing docs for agents" (2 points, 2026-03-24)news.ycombinator.com/item?id=47506051, 2026-03-24
Listed in YC's directory: 5 people, Winter 2025www.ycombinator.com/companies/promptless, 2026-11-02

2. Kenobi kenobi.ai

Kenobi is a three-person, YC Winter 2022 company in the UK that sells website personalization, so it is a small British B2B software team of the kind Coldproof sells to. It launched on Hacker News in December 2025 with both a Launch HN and a Show HN, which suggests a young company that is still working to get its product in front of buyers.

On Hacker News: "Launch HN: Kenobi (YC W22) – Personalize your website for every visitor" (46 points, 2025-12-17)news.ycombinator.com/item?id=46301865, 2025-12-17
On Hacker News: "Show HN: Kenobi – AI personalized website content for every visitor" (7 points, 2025-12-15)news.ycombinator.com/item?id=46277709, 2025-12-15
Listed in YC's directory: 3 people, Winter 2022www.ycombinator.com/companies/kenobi, 2026-11-02

3. Ergo joinergo.com

Ergo is a nine-person Winter 2025 YC company that has posted a Sales Development Representative role twice, most recently about three months ago, which suggests outbound meeting generation is something the team is still trying to staff. It also advertised a Founding Account Executive role at the same time, so the founders appear to be building out a first sales team in San Francisco, which matches the founders and first sales hires you sell to.

Hiring a Sales Development Representative in San Francisco, CA, US, posted about 3 months ago, on YC's job boardwww.ycombinator.com/companies/ergo/jobs/9EzPf70-sales-development-representative, 2026-08-04
Hiring a Founding Account Executive in San Francisco, CA, US, posted about 3 months ago, on YC's job boardwww.ycombinator.com/companies/ergo/jobs/M4V6K9g-founding-account-executive, 2026-08-04
Hiring a Sales Development Representative in San Francisco, CA, US, posted about 12 months ago, on YC's job boardwww.ycombinator.com/companies/ergo/jobs/N4uRYHv-sales-development-representative, 2025-11-07
Listed in YC's directory: 9 people, Winter 2025www.ycombinator.com/companies/ergo, 2026-11-02

Audited: 6 claims, 11 sources, 0 unsupported.

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