Free tools for cold email

67 tools in six suites, the same ones Ken runs on every campaign. Paste one thing and Ken picks the right check, runs it, and shows the whole result on screen. No signup. Email yourself the report if you want to keep it.

Six suites

Each suite is one app. Your input carries across its tools.

Deliverability

30 tools

Check a domain, test a mailbox, size the inbox fleet.

Domain health check A to F grade SPF checker 10-lookup meter DMARC checker policy ladder Blacklist checker domains and IPs

All 30 deliverability tools

Copy lab

8 tools

Paste an email. Every check runs at once.

Cold email grader 0 to 100, roast mode Spam word checker inline highlights Subject line tester inbox previews AI content detector reads human?

All 8 copy tools

Prospecting

5 tools

From a website to an ICP, a market count and a checked list.

ICP generator live company count TAM calculator companies and people Email verifier syntax, MX and role ESP checker Google vs Microsoft

All 5 prospecting tools

CSV tools

14 tools

Clean, combine and prepare a list in your browser. The file never leaves your device.

CSV list cleaner every cleaner in one pass Remove duplicates from CSV by email, domain or row Merge tag checker finds "Hi ," rows CSV converter Apollo to any import

All 14 CSV tools

Planner

10 tools

Calculators that open on a worked example.

Cold email inbox calculator inboxes, domains, cost Outbound ROI calculator leads to revenue B2B funnel builder canvas + forecast A/B test calculator sample size

All 10 planner tools

Benchmarks

Soon

Real reply data from Ken campaigns, updated monthly.

Every tool

Grouped by suite. Tools marked Soon are on the way.

Copy lab

Cold email grader Spam word checker AI content detector Subject line tester Cold email compliance checker Spintax generator AI personalization Cold email skills

Prospecting

ICP generator TAM calculator Company lookupCompany searchEmail verifier ESP checker

CSV tools

CSV list cleaner Company name cleaner Name cleaner Job title normalizer Domain normalizer Phone number formatter Remove duplicates from CSV Merge CSV files Split CSV Suppression list Merge tag checker CSV converter Email extractor CSV encoding fixer

Planner

B2B funnel builder Outbound ROI calculator Sales forecast calculator Sales quota calculator Outbound cost calculator SDR cost calculator Agency pricing calculator Email rate calculator A/B test calculator LinkedIn limits calculator

Free API

Free API and MCP

Every check as JSON, or as tools your agent can call from Claude, Cursor or Clay. Free key, the same engines as the pages.

Read the API docs Connect the MCP server

GET /api/free/v1/domain-health?domain=northwind-outbound.com

{ "domain": "northwind-outbound.com", "grade": "B", "score": 79,
  "checks": [ { "id": "dmarc", "status": "warn",
               "title": "DMARC p=none" }, ... ],
  "source_url": ".../tools/domain-health-check" }

How every tool works

Result first, on screen

One input, defaults prefilled. The full result is free and never behind a form.

Email yourself the report

The full report, the exact fixes and a link that stays live for 90 days.

Chain to the next tool

A grade hands off to the fix. A count hands off to the list. Your input carries along.

These tools run inside Ken too.

Checks, lists and campaigns in one place. Start free with 1,000 credits, no card.

Start free - 1,000 credits, no card