Compare/Head to head

Folderly vs Mailscale

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

Starting price

Folderly

$79/mo Free tier

Folderly tests email deliverability and monitors inbox placement. Inbox Insights has a free tier with 2 tests a month, then $79/mo for 100 tests.

Where Folderly fits

  • Outbound teams whose mail is landing in spam and need placement proof
  • RevOps watching DMARC and inbox placement across many domains
  • Agencies that want a deliverability report to show clients
  • Senders who already have warmup and now need monitoring

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

DetailFolderlyMailscale
Starting price$79/moSales-quoted
Free tier✓Yes–No
MCP server–No–No
Public API–No–No
Listed underDeliverabilityDeliverability

Where they pull apart

Folderly

Stands out: The product is placement and authentication (SPF, DKIM, DMARC, seed-list inbox tests), not a warmup bot and not a sequencer.

Watch out: Folderly does not send your campaigns. You still need Instantly, Smartlead, or Google Workspace as the actual mail server.

Not the right fit for

  • Teams that only need a $15 warmup mailbox
  • Buyers looking for a cold-email sequencer

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

Folderly

  • Inbox placement tests rather than warmup-only
  • Free tier with 2 placement tests a month
  • Useful when the problem is DNS and reputation, not copy
  • Does not send or warm the mail for you
  • Overlap with Instantly's built-in placement features

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

Folderly

$79/mo

Inbox Insights (placement tests before you launch) has a free tier with 2 tests a month, then $79/month for 100 tests, or $799 a year. The core Folderly deliverability product is $96 per mailbox per month on yearly billing. Pulse spam-placement alerts are free. Confirm current terms on the vendor site.

Checked 4 Nov 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 4 Nov 2026

Common questions

Can you try Folderly or Mailscale for free?
Folderly carries a free tier on our listing.

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Editorial listings, never paid rankings. Prices checked 4 Nov 2026. Confirm current terms on the vendor site. Spot an error?