Two public directories that are quietly great B2B lead sources

Most teams buy lead lists. The lists are stale, half the emails bounce, and everyone in your niche bought the same file. Meanwhile some of the best lead sources sit in plain sight: public directories that publish structure, freshness signals and even contact routes, free to read for anyone willing to parse them.

I run a fleet of scrapers on Apify (a new one ships every few days, so whatever count I write here is already wrong) and the two directory actors I promoted this week are a good case study in what public data can do for outreach.

Source one: the Y Combinator startup directory. YC publishes every funded company with batch, industry, region, team size and hiring status. That is a prefiltered universe of funded buyers: each company passed a selective screen, raised money recently and is usually growing. The directory itself does not list emails, but almost every startup site does, so the actor filters the directory first and then visits each company website to scrape a contact address. One run returns rows like company, pitch, website, team size, batch and the email it found, with the rows that lack an email flagged honestly. Recruiters filter by hiring status, sellers filter by industry, investors watch specific batches.

Source two: podcast RSS feeds. Every podcast feed carries an owner field, and that field usually holds the exact email the host wants business mail sent to. Search the public podcast directory for a keyword, pull each show feed, read the owner email plus episode count and last episode date, and you have a list of active shows in a niche with reachable hosts. The freshness signal matters as much as the email: a show that has not published in two years wastes your pitch, so the actor surfaces the last episode date and lets you skip dead shows before writing to anyone.

The pattern behind both is the same and it generalizes:

1. Find a directory that curates for you. Curation is the expensive part of lead generation, and YC (funded companies) or a podcast index (shows by topic) already did it.
2. Look for the freshness field. Hiring status, last episode date, latest batch: recency separates a lead from a museum piece.
3. Follow the entity to its own property for contact data. Company sites and RSS feeds publish contact routes on purpose, which makes them fair and reliable in a way harvested emails are not.
4. Return misses honestly. A row that says no email found is information, not failure, and it keeps your input list reconciled one to one.

Everything here is keyless HTTP against public endpoints, no browser automation and no login walls, which keeps runs fast and costs tiny. On pay per event pricing that matters: a lead costs a few cents only when the row actually delivers.

Both actors are live on Apify under the Scrapemint account as YC Startup Leads and Podcast Host Leads, priced per result with the first rows of every run free, and they sit alongside the rest of the fleet: an email checker, a phone checker, a VAT checker and more list hygiene tools that clean whatever the lead sources produce.

The bigger takeaway is that directories are underrated infrastructure. Everyone scrapes search results and social feeds, which are hostile and noisy, while directories are structured, consented and refreshed by their owners. What public directory in your niche is sitting there unparsed?