Skip to content
CheckMX logo

CheckMX

Runs cold email campaigns and follow-up sequences across your own mailboxes, with warm-up and email address checks before sending.

Free plan · From $37/mo

SalesWorkflow automationFree tier
checkmx.dev ↗
Open checkmx.devAlternativesSet it up for my team
CheckMX: data, price, alternatives
At a glancechecked Oct 31, 2026

not read yet

Use

For
Sales and outreach teams sending cold email from their own Gmail, Outlook or SMTP mailboxes
Price
Free plan · From $37/mopricing page, read Oct 31, 2026Trial & discounts: free trial · save 20% yearly
Used for
  • Check whether an address will accept mail before outreach
  • Run multi-step follow-up sequences across connected mailboxes
  • Review replies from all mailboxes in one inbox
read off checkmx.dev on Oct 31, 2026
Worth knowingcomputed from what we read · each with its source
  • Has an MCP server (1 in the registry)public registry →
Pricingpricing page, read Oct 31, 2026

Free plan · From $37/mo

Trial & discounts free trial · save 20% yearly

pricing page

Price Watch: every price change in the Atlas, weekly

How a program reaches itfound, not claimed · read Oct 31, 2026
  • MCP serverdev.checkmx/checkmxverified in the MCP registry
  • Stateanswers, requires sign-inchecked 2026-10-31
  • Address to connectcheckmx.dev/mcp
  • API docscheckmx.dev/api-docsthe vendor's page ↗

MCP server details →

This card as JSON, for your agent →

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.

Alternatives in Salesby use, among tools still maintained

Figure and bar: visits/mo, estimate · year: online since

Compare CheckMX with

Pick up to two.

All 10 alternatives to CheckMX →

All Sales tools →

Not it? Say what you need

beta

Three tools from the Atlas for the job you describe, each with what fits and what does not.

From people who use itnot part of the reading

No notes yet. What do you use CheckMX for?

Sign in to leave a note
Questions this page answers
  • What is CheckMX?

    Runs cold email campaigns and follow-up sequences across your own mailboxes, with warm-up and email address checks before sending. It is listed in the Atlas under Sales.

  • Who is CheckMX for?

    Sales and outreach teams sending cold email from their own Gmail, Outlook or SMTP mailboxes

  • How much does CheckMX cost?

    CheckMX has a free plan; paid plans start at $37/mo, per its pricing page on 2026-10-31.

  • Is CheckMX free?

    Yes, CheckMX has a free plan, per its pricing page on 2026-10-31.

  • Does CheckMX have a free trial?

    Yes, a free trial, per its pricing page (2026-10-31).

  • What are alternatives to CheckMX?

    In Sales, by use: Apollo.io, Salesloft, RocketReach, AI Follow-ups by folk, Prospeo.

How we read a tool

No votes, no reviews, no vendor claims. Every week a crawler reads each tool's own site and a few public registries, and the words on the card are bands over what it read.

  • Use: visits to the site (estimated), installs from npm and PyPI, presence in Chrome's usage report.
  • Activity: the newest release on GitHub, npm or PyPI; the newest dated page on the site; open roles on a public jobs board.
  • Price: the vendor's own pricing page, read with the date. A figure is printed only when it is on that page.
  • The line and the use cases are written by us from the homepage, one tool at a time, and refused when they repeat the vendor's marketing.

How AI assistants read each site — the reading vendors ask us about — is on each tool's own visibility page.

How we read every tool → · By INITE Atlas Desk