Compare/Head to head

Folderly vs Google Postmaster Tools

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

Google Postmaster Tools is Google's own free dashboard for how Gmail rates the mail you send to personal Gmail accounts. Every cold email sender targeting Gmail inboxes should have it set up on each sending domain. It costs nothing and needs only a Google account and a DNS record per domain.

Where Google Postmaster Tools fits

Any sender emailing personal Gmail addresses
Agencies checking Gmail compliance before scaling a domain
Recruiters sending to candidates on Gmail accounts
Teams that want the official spam rate number for free

At a glance

Detail	Folderly	Google Postmaster Tools
Starting price	$79/mo	Free
Free tier	✓Yes	✓Yes
MCP server	–No	–No
Public API	–No	✓Yes
Listed under	Deliverability	Deliverability

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

Google Postmaster Tools

Stands out: It is the only place to see the user-reported spam rate and compliance status Gmail itself measures you on, where third-party tools estimate placement from seed tests. Paid tools such as GlockApps and Warmy pull their Gmail reputation data from this same source.

Watch out: Data covers only personal Gmail addresses, so it says nothing about Google Workspace or Microsoft 365 inboxes, which is where most B2B recruiting outreach lands. Low volume domains often show no data at all, and dashboards lag by about a day.

Not the right fit for

Low volume senders whose dashboards stay empty
B2B outreach aimed mainly at company inboxes on Workspace or Microsoft 365
Anyone needing real-time alerts or inbox placement tests

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

Google Postmaster Tools

Free and run by Google
Shows the official Gmail spam rate
Compliance checklist for sender rules

Personal Gmail addresses only
Empty dashboards at low volume
Data lags around 24 hours

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

Google Postmaster Tools

Free

Google Postmaster Tools is free. You need a Google Account or Google Workspace account and must verify each sending domain with a TXT or CNAME record before dashboards show data. There are no paid plans. Confirm current terms on the vendor site.

Checked 4 Nov 2026

Common questions

Can you try Folderly or Google Postmaster Tools for free?

Folderly and Google Postmaster Tools carry a free tier on our listing.

Not the pair you wanted?

All Folderly alternatives All Google Postmaster Tools alternatives Every Deliverability tool

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