Compare/Head to head

Google Postmaster Tools vs WarmySender

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

Starting price

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

WarmySender

$29/mo 7 day free trial

All in one outreach account for cold email, built in warmup, LinkedIn, WhatsApp and Instagram, from $29/mo month to month or $13.05/mo billed yearly, with $12 per seat social add-ons. Its MCP server lets Claude, Cursor or another agent build and launch campaigns while WarmySender's scheduler keeps every account inside safe limits. Best for small recruiting desks and agencies that want one cheap tool instead of separate sender, warmup and LinkedIn subscriptions.

Where WarmySender fits

  • Solo recruiters and small agencies running candidate and client outreach on a tight budget
  • Desks that want email warmup, cold email and LinkedIn in one subscription
  • Teams that want Claude or another AI agent to build and manage campaigns
  • Recruiters who post LinkedIn Recruiter jobs and want an agent to handle postings and applicant lists

At a glance

DetailGoogle Postmaster ToolsWarmySender
Starting priceFree$29/mo
Free tier✓Yes–No
Free trialNot on record7 day free trial
MCP server–No✓Yes
Public API✓Yes✓Yes
Listed underDeliverabilityOutreach, Deliverability, Verification, Lead generation, LinkedIn

Where they pull apart

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

WarmySender

Stands out: The agent integration is unusually deep and unusually guarded: 90 MCP tools reach campaigns on four channels, the unified inbox, lead search and verification, yet an agent can never send a message itself or raise a cap, because every action goes through the same scheduler as the web app. Recruiters also get something sales tools rarely offer, MCP tools that draft, publish and close LinkedIn Recruiter job postings and list applicants.

Watch out: The cheapest prices need commitment: the headline month to month Pro rate is $29, and the low per month figures come from paying a year ($156.60) or three years ($313.20) up front. LinkedIn, WhatsApp and Instagram are each $12 per connected account per month on top, so a multichannel desk adds up. Automating LinkedIn and Instagram from any tool carries account restriction risk even with WarmySender's ramps and caps, and ChatGPT only gets a reduced set of MCP tools.

Not the right fit for

  • Teams that need deep native ATS or recruiting CRM sync
  • Buyers who will only pay month to month and want the lowest price
  • Companies whose policy forbids LinkedIn or Instagram automation

Pros and cons

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

WarmySender

  • Email, warmup, LinkedIn, WhatsApp and Instagram in one low cost account
  • 90 tool MCP server included on every paid plan, with hard send caps agents cannot override
  • Generous mailbox allowances, 50 even on Pro, with warmup included
  • Lowest prices require annual or three year prepayment
  • LinkedIn, WhatsApp and Instagram each cost an extra $12 per account per month
  • Young, bootstrapped vendor with a short review history

What each one costs

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

WarmySender

$29/mo

Pro is $29/mo month to month for 10,000 emails a month, 50 mailboxes and 10,000 lead saves, Enterprise $69.99/mo for 100,000 emails, 400 mailboxes and API access, and Ultimate $199/mo for 300,000 emails, 800 mailboxes and 10 workspaces. Annual billing takes 55% off (Pro works out at $13.05/mo, billed $156.60 a year) and a three year prepay takes 70% off. LinkedIn, WhatsApp and Instagram outreach are add-ons at $12 per connected account per month, or $120 a year. Email verification packs without a plan start at $29 for 15,000 checks and never expire. New accounts get a 7-day free trial. Confirm current terms on the vendor site.

Checked 27 Oct 2026

Common questions

Can you try Google Postmaster Tools or WarmySender for free?
Google Postmaster Tools carries a free tier on our listing. WarmySender offers a 7 day free trial.
Does Google Postmaster Tools or WarmySender have an MCP server?
WarmySender ships a first party MCP server, so an AI assistant can work the product directly.

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