Head to head

Instantly vs Mailscale

Same facts, side by side: starting price, free tier, MCP, API and what each one is actually built for.

Instantly

$47/mo Free trial

Cold-email infra for teams farming many sending mailboxes. Public Outreach start is $47/mo monthly.

Where Instantly fits

  • Outbound recruiting teams sending at volume
  • Agencies running many sending accounts
  • Desks that need warmup plus a unibox
  • MCP/API automation around campaigns

Mailscale

Sales-quoted

Mailscale now leads with agentic B2B cold email, pre-warmed mailboxes, and a 400 million contact file. Public rates are not printed. Plans are built on a sales call.

Where Mailscale fits

  • B2B teams that want mailboxes plus an outbound agent in one vendor
  • Desks that need pre-warmed domains instead of a two-week warmup
  • Staffing and sales teams that already close and lack prospecting time
  • Buyers comparing mailbox infrastructure against Instantly or Smartlead

At a glance

DetailInstantlyMailscale
Starting price$47/moSales-quoted
Free tier–No–No
Free trialYesNot on record
MCP server✓Yes–No
Public API✓Yes–No
Listed underLead generation, OutreachDeliverability

Where they pull apart

Instantly

Stands out: Warmup, unibox, and volume send with hosted MCP and a public API.

Watch out: Deliverability still depends on your domains and inboxes, not the tool alone.

Not the right fit for

  • Teams that only need LinkedIn messaging
  • Buyers looking for an ATS

Mailscale

Stands out: The live homepage sells an autonomous outbound agent that writes 125 email variants and reroutes sends when inbox placement drops, on top of mailbox provisioning.

Watch out: The vendor does not publish a rate card. The homepage tells you to get a custom plan on a call, so there is no self-serve pricing.

Not the right fit for

  • Teams that need a published per-inbox rate before talking to sales
  • In-house recruiters who only need an ATS, not outbound email

Pros and cons

Instantly

  • Warmup and unibox in the same desk
  • Hosted MCP plus REST API
  • No-card get-started path on the vendor site
  • Sending domains and inboxes are bought separately
  • Sequence designer is plainer than multichannel rivals
  • Volume tiers step up quickly as mailboxes grow

Mailscale

  • Pre-warmed mailboxes so you skip the two-week warmup
  • Help centre still covers mailbox, domain, and billing operations
  • Agentic copy, list building, and reply handling in the same product
  • No public rate card
  • Pricing is a sales call, not self-serve checkout
  • Shared mailbox infrastructure is a deliverability variable you do not control

What each one costs

Instantly

$47/mo

From ~$30/mo. Confirm current terms on the vendor site.

Checked 17 Sep 2026

Mailscale

Sales-quoted

The vendor does not publish a rate card. The homepage says an outbound specialist builds your plan and pricing on a call. Help-centre docs still cover mailbox and domain billing. Treat current commercial terms as sales-quoted. Confirm current terms on the vendor site.

Checked 19 Sep 2026

Common questions

Can you try Instantly or Mailscale for free?
Neither carries a free tier on our listing. Instantly offers a free trial.
Does Instantly or Mailscale have an MCP server?
Instantly ships a first party MCP server, so an AI assistant can work the product directly.

Not the pair you wanted?

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Editorial listings, never paid rankings. Prices checked 17 Sep 2026. Confirm current terms on the vendor site. Spot an error?