Alternatives & Comparisons

Warmy alternative

By Chris Aylott · Last verified: September 2026

Warmy has the largest review base in the email warmup category — more than 460 reviews on G2 at 4.8 stars. If you are comparing tools, that matters. So do the two complaints that appear most often in those same reviews.

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Where Warmy genuinely leads

Warmy has built the strongest review moat in the category. Over 460 G2 reviews at 4.8 stars represents years of consistent customer feedback — no other warmup tool is close on raw review volume. If social proof is your primary decision signal, Warmy wins that metric by a wide margin.

Source: Warmy on G2 — verify count and rating at read time, review data changes.

The two complaints that appear most in those reviews

Warmy’s G2 page carries the positive reviews prominently. Reading the full text reveals two recurring friction points that reviewers name independently of each other.

Per-inbox pricing that stops working at scale

Warmy charges per mailbox — typically $41–49/inbox at entry level, with no public pricing page (pricing is available on request). Reviewers consistently identify this as the top reason for leaving, particularly for teams running 10 or more inboxes, where the total climbs to $400–500/month or higher.

Multiple independent reviewers describe the same pattern: positive experience with the product, cancelled on cost. The concern is not the price for one mailbox — it is what happens when the number grows.

Corroborated across multiple independent G2 reviews. Pricing should be verified directly at warmy.io or on request before making a decision.

Accounts disconnecting silently while billing continues

The second pattern — appearing in roughly 40 separate G2 reviews — is accounts disconnecting without notification. Reviewers report warmup sequences stopping, sending dropping to zero, and billing continuing as normal with no alert from the tool.

For a “set and forget” product, this is the most damaging complaint possible: the tool is supposed to run in the background so you don’t have to think about it. Silent disconnection means it stops working precisely at the moments you are least likely to notice.

Sourced from G2 review text. Reviewers describe the experience; Warmy as a company has not publicly confirmed this as a known issue.

Side-by-side

Warmy pricing requires a sales conversation — figures below are from reviewer reports and should be verified directly.

Feature	Warmy	InboxPlease
Pricing at 10 mailboxes	$400–500/month	~€158/month (€14/mailbox extra over 5)
Free trial	None	14 days, no card required
Public pricing page	No — requires sales call	Yes
Placement test seed network	Capped at 50 tests/month; seed panel not publicly disclosed	Sample size published with every result
Microsoft 365 support	Reported weaker than Google Workspace	Provider-weighted sending; bi-directional across Gmail and Outlook
Disconnection alerts	No — disconnections reported as silent	Auto-continuation rebuilds strategy from results; state visible on demand
Strategy preview before execution	No	Yes — review the strategy, give feedback, then it runs
G2 review base	460+ reviews at 4.8 — largest in the category	Earlier stage; fewer reviews
Warm-up speed control	Not customisable	Adjustable per mailbox
Real-time alerts	Not included	Included

How InboxPlease addresses these specifically

On pricing

InboxPlease charges €79/month for 5 mailboxes, with additional mailboxes at €14 each and a 25-mailbox plan at €299/month. The pricing is public on the site — no sales call required to compare. At 10 mailboxes the total is roughly €149/month, compared to the $400–500/month range reviewers report for Warmy at the same scale.

On silent disconnections

InboxPlease uses auto-continuation: when a warmup cycle completes, the system analyses the results and builds the next strategy from them rather than stopping. Current state is surfaced on request through the AI assistant — so if a disconnect does occur, you can ask what is running and get an honest answer rather than a silent gap. Nothing runs unnoticed.

On placement testing

Warmy’s placement testing is capped at 50 tests per month and the seed panel size is not publicly disclosed. InboxPlease publishes the sample size alongside every result — so when a score comes back, you know how many mailboxes it was measured against, not just the number itself. A score with a stated sample size is a measurement; without it, it is closer to a reading.

On Microsoft 365

Reviewers report Warmy is noticeably weaker on M365 than on Google Workspace. InboxPlease uses provider-weighted sending that adjusts volume per provider based on actual performance, with bi-directional sending across Gmail and Outlook. If your infrastructure is primarily M365, that difference matters.

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No warmup required to run the test. See where your domain lands across Gmail, Outlook, and other major providers — with the sample size shown alongside the result.

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