Free cold email and email list tools
By Ryan Doyle, co-founder of Sales.co. Published November 2, 2026.
Sales.co has 5 free tools for people who send cold email or buy email lists: one to clean a list and one to size a market. Two check an email before you send it, and one plans how many meetings a campaign can book. Each tool page shows its data, where it came from and its date. None of them asks for an email address. For founders, sales teams and small business owners who run their own outreach.
If you'd rather not run it yourself, Sales.co runs done-for-you cold email from $2,000 a month for up to 10,000 emails, and sells one-time business email lists at $295 each.
Free email list cleaner: remove duplicate emails and flag the inboxes nobody reads
Paste a list to remove duplicate emails, bad addresses and typos, flag info@ and noreply@ inboxes, and compare its free-mail share with 45 business lists.
Open the toolHow many restaurants, plumbers, gyms and other businesses are in the US, by state
US business counts for 41 industries in every state: Census 2023 establishments next to the contacts Sales.co has on file. 618,476 restaurants.
Open the toolCold email subject line grader, scored on 933,601 prospects' replies
Grade a cold email subject line against 933,601 prospects' replies (Oct 6, 2025 to Oct 17, 2026): first name in the line 0.89% vs 0.57%, 5 to 7 words best.
Open the toolEmail spam checker for cold emails, scored on 1,143,259 first emails' replies
Free email spam checker: paste a cold email to see its trigger words and the reply rate of emails like it, from 1,143,259 first emails we sent.
Open the toolLead generation calculator: how many meetings your cold email will book
Free lead generation calculator prefilled with Sales.co rates from 336,257 contacts: replies, meetings and cost per lead for your cold email volume.
Open the toolSources: where the numbers come from
- The subject line grader and the spam checker use replies to cold email Sales.co sent for its clients, refreshed every week by a job that reads the sending data. The lead generation calculator is prefilled with Sales.co campaign rates. Each page states its count and dates.
- The business count lookup uses the US Census Bureau's County Business Patterns, next to the contacts on file for each Sales.co email list.
- The list cleaner compares your list's free-mail share with 45 Sales.co business lists counted between September 3 and October 21, 2026. It runs in your browser and does not send your list anywhere.
- Prices: done-for-you from $2,000 a month for up to 10,000 emails on sales.co/pricing, and $295 per list on sales.co/email-lists, read November 2, 2026.
Where to go next
cold email research · email lists · cold email templates · pricing · Sales.co home